• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    WELL TESTING ANALYSIS FOR HORIZONTAL WELL WITH CONSIDERATION OF THRESHOLD PRESSURE GRADIENT IN TIGHT GAS RESERVOIRS*

    2012-08-22 08:31:49GUOJingjing
    關(guān)鍵詞:平均值長度設(shè)備

    GUO Jing-jing

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China, E-mail: gjjswpu@126.com

    ZHANG Su

    Central Sichuan Mining District, PetroChina Southwest Oil and Gas Field Company, Suining 629000, China

    ZHANG Lie-hui

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China

    QING Hairuo

    Department of Geology, University of Regina, Regina, SK S4S 0A2, Canada

    LIU Qi-guo

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China

    (Received January 4, 2012, Revised April 18, 2012)

    WELL TESTING ANALYSIS FOR HORIZONTAL WELL WITH CONSIDERATION OF THRESHOLD PRESSURE GRADIENT IN TIGHT GAS RESERVOIRS*

    GUO Jing-jing

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China, E-mail: gjjswpu@126.com

    ZHANG Su

    Central Sichuan Mining District, PetroChina Southwest Oil and Gas Field Company, Suining 629000, China

    ZHANG Lie-hui

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China

    QING Hairuo

    Department of Geology, University of Regina, Regina, SK S4S 0A2, Canada

    LIU Qi-guo

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China

    (Received January 4, 2012, Revised April 18, 2012)

    A fundamental solution for homogeneous reservoir in infinite space is derived by using the point source function with the consideration of the threshold pressure gradient. The fundamental solution of the continuous point source function is then derived based on the Green function. Various boundary conditions of the reservoirs are considered for this case and the corresponding solutions are obtained through the mirror image reflection and the principle of superimposition. The line source solution is obtained by integration. Subsequently, the horizontal-well bottom hole pressure response function for a non-linear gas flow in the homogeneous gas reservoir is obtained, and the response curve of the dimensionless bottom hole pressure and the derivative for a horizontal well in the homogeneous gas reservoir are obtained. In the end, the sensitivities of the relevant parameters are analyzed. The well test model presented in this paper can be used as the basis of the horizontal well test analysis for tight gas reservoirs.

    horizontal well, non-linear gas flow, threshold pressure gradient, tight gas reservoir

    Introduction

    In the early 1987, the concept of the threshold pressure gradient was introduced into the petroleum industry. Subsequent studies have confirmed the exi-stence of the threshold pressure gradient in tight gas reservoirs. Due to large pore throats in conventional gas reservoirs, the threshold pressure gradient has little effect on the well performance and can be neglected. However, with significantly smaller pore throats in tight gas reservoirs, the effect of the threshold pressure gradient might be significant and should be considered for the prediction of the well performance.

    The horizontal well test analysis models were first developed during the 1980s. Clonts and Ramey[1]derived one of the earliest analytical solutions for the horizontal well test analysis, based on the line source approximation for a vertical partially penetrated fracture well, with the assumption that a horizontal wellcould be viewed as a well producing from a line source in an infinite-acting reservoir. These models have three major limitations: (1) the wellbore pressure is calculated at a finite radius outside the source and it is therefore impossible to obtain the wellbore pressure within the source, (2) it is difficult to conduct a realistic productivity comparison between a horizontal well and a vertical fractured well, (3) the line source approximation may not be adequate for reservoirs with thin pay zones.

    During the 1990s, some new models were developed to eliminate the limitations of the earlier horizontal well models. However, the fundamental assumptions and the methodology employed in the development of these new set of solutions remain virtually the same as those of the earlier models. Ozkan[2]presented one of the most compelling arguments that the horizontal wells require realistic models and concepts which are robust enough to meet the increasingly challenging task of the accurate evaluation of the horizontal well performance. Ozkan’s work presented a critique of the conventional and contemporary horizontalwell-test analysis procedures that they will not be adeof conditions. Ogunsanya et al.[3,4]developed a new quate and the margin of error is associated with a set type curve solution for a hydraulically fractured horizontal well producing from a solid bar source in an infinite-acting reservoir. A dimensionless rate function was introduced to convert the pressure response of a horizontal well into the equivalent response of a vertical fractured well.

    In the 20th century, Ozkan[5,6]presented a discussion of the fractured horizontal-well performance in conventional and tight reservoirs. Based on Ozkan’s studies, Brown et al.[7]presented an analytical trilinear flow solution to simulate the pressure transient and production behavior of fractured horizontal wells in tight reservoirs.

    Some models were also proposed to study the pressure dynamics for vertical wells with consideradual porosity reservoirs[8-12]. However, to the best of tion of the threshold pressure gradient in single and our knowledge, little progress has been made on horizontal well test models with consideration of the threshold pressure gradient in tight gas reservoirs. Therefore, this paper proposes a transient mathematical model for horizontal wells with consideration of the threshold pressure gradient which is more suitable for general tight gas reservoirs. Subsequently, the horizontal well bottom hole pressure response function for a non-linear gas flow in a homogeneous gas reservoir is constructed. The response curve of the horizontal well in the form of the dimensionless bottom hole pressure and its derivative for the homogeneous gas reservoir are obtained. In the end, the sensitivities of related parameters are analyzed.

    Fig.1 Schematic diagram of infinite space unit

    1. Point source function in an infinite space

    As shown in Fig.1, let Ω be an arbitrary subdomain within the boundary B, and n be the outward unit normal to dΓ, a surface element of the boundary B of the study area. M is a volume element dV at any point within the boundary B. According to the law of conservation of mass, the overall fluid quantity in the hierarchy of control should be equal to the mass difference between the inflow and the outflow.

    where D is the space-time domain, φ is the porosity, ν is the flow velocity, ρ is the density and t is the time varia- ble.

    We restrict our attention to Newtonian fluids and isothermal conditions, and the reservoir is considered homogeneous in all rock properties and isotropic with respect to permeability. Ignoring gravity and capillary pressure, the equation governing the flow with consideration of the threshold pressure gradient can be derived from the equation of state, the motion equation and the continuity equation, which is expressed in terms of the pseudo pressure.

    where ψ is the pseudo pressure for the real gas,, k is the permeability, μ is the viscosity for the gas, Z is the gas compressibility coefficient,ic is the total compressibility of the porous medium, η is the diffusivity of the porous solid, η=k/(φμct), λψBis the (pseudo) threshold pressure gradient , λψB=2piλBL/μZ, λBis the threshold pressure gradient,ip is the reference pressure, L is the reference length.

    Let iD=i/L, i=x,y,z, tD=ηt/L2, Δψ= ψi-ψ. Then we obtain the dimensionless form of Eq.(2) as follows

    whereDt is the dimensionless time.

    The Laplace transformation of Eq.(3) yields

    where s is the Laplace transform variable.

    For a point source located at the origin in an isotropic system, we can write Eq.(4) with the consideration of the threshold pressure gradient in the spherical coordinates as

    and

    whereDρ is the dimensionless spherical radial distance.

    The boundary condition at the surface of a vanishingly small sphere corresponding to the instantaneous withdrawal of an amount of fluid1q~ at =0t can be expressed by

    where ε is the micro variable,1q~ is the production rate from a point source, T is the temperature,scp andscT are the pressure and the temperature under the standard condition.

    The Laplace transform of Eq.(6) gives

    For simplicity, assume that the strength of the source is unity, then Eq.(7) can be written as

    By using the pre-solution[13]method, the general solution of Eq.(9) is

    That is the fundamental solution of the instantaneous point source function in the Laplace space. It is worth pointing out that the first term in Eq.(10) is directly related to a point source strength and the second term is related to the threshold pressure gradient. WhenBψλ is equal to zero, Eq.(10) is the instantaneous fundamental solution without consideration of the threshold pressure gradient.

    Considering the strength of the source, the instantaneous fundamental solution is

    When a point source function in the center withdraws a continuous liquid from 0 to t, the fundamental solution of a continuous point source in the physical space is given by

    where

    Unless explicitly specified, we will assume that the source distribution in time and over the integration path in Eq.(12) is uniform. Thus we have

    Fig. 2 Schematic diagram of a horizontal well in infinite formation

    2. Mathematical models of horizontal well

    The physical model of a horizontal well is schematically shown in Fig.2. The key assumptions are:

    (1) The reservoir is horizontal, homogeneous, anisotropic with the constant horizontal permeability khand the constant vertical permeability kv, the thickness h, and the porosity φ. The reservoir can be infinite or finite in the lateral extension. The reservoir is bounded with closed top and bottom boundaries.

    取平均值ΔL為17.5 dB/m,ΔL0對于本設(shè)備取120 dB,計(jì)算出消聲器長度為L=1 010 mm.

    (2) The reservoir pressure is constant in the initial condition. Gravity effect and capillary pressure are considered to be negligible.

    (3) The well is assumed to be parallel to the top and the bottom sealing boundaries, to be located at any locationwz, from the bottom, and its length is 2L. The well radius iswr.

    (4) Single-phase fluid and constant rate production,scq.

    According to the fundamental solution to a continuous point source in an infinite space, Eq.(13), the fundamental solution under impermeable upper and lower boundary conditions can be obtained by using the mirror images and the principle of superposition, which is given by

    where

    Equation (14) is the continuous point source solution for the laterally infinite system. Assume that the gas reservoir is a close system with a cylindrical surface boundary located at RD=ReD. In the case where the boundary conditions at zD=0 and 1 and at RD=ReDare all impermeable, a solution in the following form can be constructed

    In Eq.(15), P is a solution that satisfies the inner boundary condition and the impermeable boundary conditions at zD=0 and 1. G is also a solution that satisfies the boundary condition at zD=0 and 1, and P+G satisfies the boundary conditions at RD= ReDand the inner boundary condition. Then we can choose the solution Eq.(14) as P. Since Eq.(14) satisfies the inner boundary condition, the contribution of G to the inner boundary condition vanishes as RD→0. We can get the expression of G as follows by using the Muskat’s method

    where

    Thus, the continuous point source solution for the laterally closed system can be written as

    Equations (14) and (17) are the continuous point source solutions for laterally infinite and laterally closed systems with impermeable top and bottom boundaries, respectively.

    The solution for a horizontal line-source well of length 2L can be obtained from the integration of the right side of Eqs.(14) and (17) from (xw-L) to (xw+L) with respect to xw. The pressure distribution for the horizontal well in a laterally infinite reservoir with boundaries of two impermeable planes at z=0 and z=h can be written as

    where

    The pressure distribution for a horizontal well in a laterally bounded reservoir with boundaries of two impermeable planes at =0z and =zh, can be written as

    where

    The preceding solutions give the horizontal-well pressure response functions for various boundary conditions. However, the wellbore storage and skin effects have not yet been taken into account. By using the Duhamel principle, the dimensionless well bottom pressure of the horizontal wells with the wellbore storageDC and the skin effects S and in the Laplace domain is obtained as

    where

    3. Analysis of type curve features

    According to the solution of the mathematical model for a horizontal well in tight gas reservoirs, the pressure and the derivative type curves that reflect the horizontal well pressure behavior in laterally infinite gas reservoirs are obtained by using the Stehfest numerical reversion algorithm[14,15]. The results are shown in Figs.3-4.

    Figure 3 is a dimensionless pressure and pressure-derivative log-log type curve for a horizontal well with differentDλ in an infinite gas reservoir with a sealing top and bottom boundaries. When the threshold pressure gradient is considered, there is an obviously pressure behavior change in the fourth flow regime. The fourth flow regime can be further divided into two phases, the late horizontal pseudo-radial flow and the upwarping flow. In other word, the effect of the threshold pressure gradient on the pressure behavior mainly exists in the med-late periods. It leads to a gradual growth of the pressure drawdown and an upwarping of the pressure and derivative curves. The greater the threshold pressure gradient is, the steeper the upwarping feature will be. The upwarping seg-ment of the curve usually appears after the late horizontal pseudo-radial time period. However, whenDλ is too large, the previous flow regime can become deceitful. The effect of the threshold pressure gradient on the relationship between the derivative and the time shows mainly in this stage. With the growth ofDλ, the fourth flow regime shows up earlier, butDλ has no obviously effect on the other flow regimes.

    Fig.3 The effect of threshold pressure gradient on horizontal gas well pressure behavior (Pe=30MPa , TR=80oC , rw=0.1m , γg=0.65, β=5, CDe2s=300, LD=10, hD=300,zwD=0.5)

    Fig.4 The effect of dimensionless length on horizontal gas well pressure behavior (Pe=30MPa , TR=80oC , rw= 0.1m, γg=0.65, β=5, CDe2s=300, λD=0.005, hD=300,zwD=0.5)

    Figure 4 is a dimensionless pressure and pressure-derivative log-log type curve of one horizontal well with different dimensionless lengthDL in an infinite gas reservoir with a sealing top and bottom boundaries. Figure 4 shows that the effect of the threshold pressure gradient on the curve shows mainly in the upwarping flow regime after the late horizontal radial flow time period. WhenDλ is given, the smaller the value ofDL is, the earlier the upwarping of the curve appears, and vice versa. The reason lies in the condition that the other parameters are invariant. The smaller the value ofDL is, the shorter the horizontal length is and the smaller its the drainage area will be. The resistance to the flow becomes relatively greater, and the corresponding drawdown pressure will be greater. Because the permeability and the threshold pressure gradient are given, the upwarping of the pressure and derivative curves shows up earlier.

    Similar to the previous process, based on the solution of the mathematical percolation model for a horizontal well in a closed external boundary gas reservoir with a sealing top and bottom boundaries, the pressure and derivative type curves for a horizontal well are obtained and plotted in Figs.5-6.

    Fig.5 The effect of threshold pressure gradient on horizontal gas well pressure behavior (Pe=30MPa , TR=80oC , rw=0.1m , γg=0.65, β=5, CDe2s=300, LD=10, hD=300,reD=10)

    Fig.6 The effect of dimensionless length on horizontal gas well pressure behavior (Pe=30MPa , TR=80oC , rw= 0.1m, γg=0.65, β=5, re=3000, CDe2s=300, hD=300,λD=0.01)

    Figure 5 shows the dimensionless pressure and its derivative type curves of a single horizontal gas well in a laterally closed gas reservoir with a sealing top and bottom boundaries. From the derivative curve, it can be seen that the flow behavior is identical to that of the infinite situation before the pressure wave propagates to the circular outer boundary. After the pressure wave reaches the circular closed outer boundary, it is shown that the pseudo-stable flow behavior is controlled by the closed outer boundary. The greater the threshold pressure gradient is, the earlier the upwarping of the derivative curve will be. The derivative is a straight line with a certain slope related to the value ofDλ and less than 1. In addition, the pseudostable flow behavior appears earlier. When the value ofDλ exceeds a certain value, the previous flowregime might be deceitful. The above features of the derivative curve are caused by the combination of the effects of the threshold pressure gradient and the closed outer boundary.

    Figure 6 shows the dimensionless pressure and its derivative log-log type curves for a single horizontal gas well with differentDL in a laterally closed gas reservoir with a sealing top and bottom boundaries. With or without considering the effect of the threshold pressure gradient, the appearance of the pseudo-stable radial flow is not related to the length of the horizontal wells. However, due to the existence ofDλ, the upwarping feature caused by the effect of the closed boundary comes relatively earlier. With the decrease ofDL, the late horizontal pseudo-stable flow shows up earlier. The reverse is true whenDL increases.

    4. Model validation

    In this section, a horizontal production well located in a tight gas reservoir is considered. The relevant parameters of the well are as follows. The reservoir thickness is 12.6 m, the well length of the horizontal section is 735.23 m, the well radiuswr is 0.1 m, the average porosity is 0.1, and the reservoir temperature and the initial pressure are 405 K and 42.11 MPa, respectively. The well has been in production for 34.15 h at a rate of 36.59×104 m3/d before the pressure buildup test and the PBU well test lasts 238.59 h. The fluid viscosity is 0.03362 cp. The Z-factor is 0.9114, and the total compressibility is 0.01516 MPa-1.

    Fig.7 Log-log fitting curves of actual well test data

    The log-log fitting curves are shown in Fig.7. The parameter λ can be calculated by the fitting resultsDλ. The obvious upwarping tendency caused by the threshold pressure gradient can be observed from the fitting curves in a late time.

    The fitting results are as follows: the permeability is 6.746 mD, and the wellbore storage factor is 0.1429 m3/MPa, and the calculated threshold pressure gradient is 0.00034 MPa/m.

    5. Conclusions

    (1) The horizontal gas well models with consideration of the threshold pressure gradient is established in this paper and they can be used as the theoretical basis of the horizontal well test analysis for tight gas reservoirs.

    (2) The bottom hole pressure response function for the horizontal gas well with consideration of the threshold pressure gradient in various boundary conditions is derived by using the fundamental solution of the point source function in the Laplace domain.

    (3) The effect of the threshold pressure gradient on the pressure behavior for horizontal gas wells mainly shows in the med-late time periods. The upwarping feature of the type curves appears earlier with the increase ofDλ value, and vice versa. The threshold pressure gradient has a negligible effect on the previous flow regimes.

    (4) For an infinite gas reservoir, with fixedDλ, the smaller the value ofDL is, the earlier the upwarping feature of the type curves appears, and vice versa. For a laterally closed gas reservoir, the appearance of the pseudo-stable radial flow is independent of the well length of the horizontal section. However, due to the existence ofDλ, the upwarping feature of the type curves is caused by the closed boundary conditions.

    Acknowledgement

    This worked was supported by the Research Foundation of the State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University (Grant No. PLN-ZL201201).

    [1] CLONTS M. D., RAMEY H. J. Pressure transient analysis for wells with horizontal drainholes[C]. SPE 15116. Oakland, California, USA, 1986, 215-230.

    [2] OZKAN E. Analysis of horizontal-well responses: Contemporary vs. conventional[J]. SPE Reservoir Evaluation and Engineering, 2001, 4(4): 260-269.

    [3] OGUNSANYA B. O. A physically consistent solution for describing the transient response of hydraulically fractured and horizontal wells[D]. Ph. D. Thesis, Lubbock, Texas, USA: Texas Tech University, 2005.

    [4] OGUNSANYA B. O., OETAMA T. P. and LEA J. F. et al. A coupled model for analyzing transient pressure behavior of horizontal drainholes[C]. SPE 94331. Oklahoma City, Oklahoma, USA, 2005, 1-14.

    [5] OZKAN E. Comparison of fractured horizontal-well performance in conventional and unconventional reservoirs[C]. SPE 121290. San Jose, California, USA, 2009, 1-16.

    [6] OZKAN E., BROWN M. and RAGHAVAN R. et al. Comparison of fractured-horizontal-well performance in tight sand and shale reservoirs[J]. SPE Reservoir Evaluation and Engineering, 2011, 14(2): 248-259.

    [7] BROWN M., OZKAN E. and RAGHAVAN R. et al. Practical solutions for pressure transient responses of fractured horizontal wells in unconventional reservoirs[J]. SPE Reservoir Evaluation and Engineering, 2011, 14(6): 663-676.

    [8] LIANG Bin, LI Min and ZENG Fanhua et al. Study on the analytical solution of mathematical model for the tight gas reservoir about start-up gradient[J]. Fault-Block Oil and Gas Field, 2004, 11(6): 31-34(in Chinese).

    [9] LIU Qi-guo, YANG Xu-ming and WEI Hong-mei et al. Study of well-test model of low permeability’s dualpore media with flowing boundary in oil and gas[J]. Journal of Southwest Petroleum Institute, 2004, 26(5): 30-33(in Chinese).

    [10] ZHANG Yun, WANG Zi-sheng and YAO Jun et al. Study and application of pressure transient of naturally fractured reservoirs with stree-sensitive and start pressure grade[J]. Journal of Hydrodynamics, Ser. A, 2007, 22(3): 332-337(in Chinese).

    [11] FENG Guo-qing, LIU Qi-guo and SHI Guang-zhi et al. An unsteady seepage flow model considering kickoff pressure gradient for low-permeability gas reservoirs[J]. Petroleum Exploration and Development, 2008, 35(4): 457-461(in Chinese).

    [12] CHENG Lin-song, REN Sheng-li and LIAN Pei-qing. Well test analysis on low velocity and non-Darcy flow in dual-porosity reservoir with dynamic boundary[J]. Chinese Journal of Computational Mechanics, 2011, 28(6): 879-883(in Chinese).

    [13] ZHANG Xue-yuan. The resolvent method of solving second order variable coefficient linear non-homogeneous differential equation[J]. Journal of Shanghai Second Polytechnic University, 2004, (1): 1-7(in Chinese).

    [14] ZHANG Llie-hui, GUO Jing-jing and LIU Qi-guo. A new well test model for a two-zone linear composite reservoir with varied thicknesses[J]. Journal of Hydrodynamics, 2010, 22(6): 804-809.

    [15] GUO J., ZHANG L. and WANG H. et al. Pressure transient analysis for multi-stage fractured horizontal wells in shale gas reservoirs[J]. Transport in Porous Media, 2012, 93(3): 635-653.

    10.1016/S1001-6058(11)60278-3

    * Project supported by the National Science Fund for Distinguished Young Scholars of China (Grant No. 51125019), the National Key Basic Research and Development Program of China (973 Program, Grant No. 2011CB201005).

    Biograophy: GUO Jing-jing (1986-), Female, Ph. D. Candidate

    ZHANG Lie-hui,

    E-mail: zhangliehui@vip.163.com

    猜你喜歡
    平均值長度設(shè)備
    “平均值代換”法在數(shù)學(xué)解題中的應(yīng)用
    諧響應(yīng)分析在設(shè)備減振中的應(yīng)用
    平均值的一組新不等式
    1米的長度
    基于MPU6050簡單控制設(shè)備
    電子制作(2018年11期)2018-08-04 03:26:08
    愛的長度
    怎樣比較簡單的長度
    500kV輸變電設(shè)備運(yùn)行維護(hù)探討
    不同長度
    讀寫算(上)(2015年6期)2015-11-07 07:17:55
    原來他們都是可穿戴設(shè)備
    av天堂中文字幕网| e午夜精品久久久久久久| 欧美乱色亚洲激情| 日韩欧美国产在线观看| xxxwww97欧美| 夜夜爽天天搞| 亚洲美女视频黄频| 亚洲精品日韩av片在线观看 | 深爱激情五月婷婷| 九九在线视频观看精品| 国产高清三级在线| 欧美色视频一区免费| 综合色av麻豆| 国产精品久久视频播放| 国产一区在线观看成人免费| 小说图片视频综合网站| 日韩欧美在线二视频| 久久6这里有精品| 一进一出好大好爽视频| 三级男女做爰猛烈吃奶摸视频| 欧美日韩福利视频一区二区| 国产三级黄色录像| 国产午夜福利久久久久久| 小蜜桃在线观看免费完整版高清| 男插女下体视频免费在线播放| 深夜精品福利| 欧美区成人在线视频| 亚洲va日本ⅴa欧美va伊人久久| 成人18禁在线播放| 国产中年淑女户外野战色| 性色avwww在线观看| 久久久成人免费电影| 91字幕亚洲| 亚洲av二区三区四区| 午夜激情福利司机影院| 99国产综合亚洲精品| 美女黄网站色视频| www日本黄色视频网| 久久香蕉精品热| 欧美xxxx黑人xx丫x性爽| 欧美最新免费一区二区三区 | 在线天堂最新版资源| 小蜜桃在线观看免费完整版高清| 午夜精品一区二区三区免费看| 在线观看免费午夜福利视频| 我要搜黄色片| 特级一级黄色大片| 一级毛片高清免费大全| 免费看日本二区| 久久性视频一级片| 国产高清视频在线观看网站| av欧美777| 国产极品精品免费视频能看的| 高潮久久久久久久久久久不卡| 嫁个100分男人电影在线观看| 亚洲片人在线观看| 国产午夜精品久久久久久一区二区三区 | 老司机在亚洲福利影院| 亚洲av一区综合| 婷婷精品国产亚洲av| 欧美不卡视频在线免费观看| 99热这里只有是精品50| 可以在线观看的亚洲视频| 麻豆国产97在线/欧美| 只有这里有精品99| 精品不卡国产一区二区三区| 尾随美女入室| 国产成人午夜福利电影在线观看| 国产色婷婷99| 亚洲美女搞黄在线观看| 久久99热6这里只有精品| 最近的中文字幕免费完整| 婷婷色综合www| 国模一区二区三区四区视频| 搡老妇女老女人老熟妇| 成人特级av手机在线观看| 亚洲一级一片aⅴ在线观看| 亚洲精品成人久久久久久| av在线观看视频网站免费| 22中文网久久字幕| 日本-黄色视频高清免费观看| 人人妻人人澡人人爽人人夜夜 | 色网站视频免费| 成年版毛片免费区| 国产一区二区三区av在线| 爱豆传媒免费全集在线观看| 亚洲高清免费不卡视频| 中文字幕亚洲精品专区| 国产精品人妻久久久久久| 肉色欧美久久久久久久蜜桃 | 我的老师免费观看完整版| 免费观看在线日韩| 国产成人精品福利久久| 亚洲最大成人手机在线| 国产黄色小视频在线观看| 能在线免费看毛片的网站| 美女高潮的动态| 又爽又黄a免费视频| 九九爱精品视频在线观看| 婷婷色av中文字幕| 亚洲人与动物交配视频| 五月天丁香电影| 嫩草影院新地址| 国产精品女同一区二区软件| 国产亚洲91精品色在线| 亚洲av成人av| 久久99热这里只有精品18| 日韩精品青青久久久久久| 大话2 男鬼变身卡| 1000部很黄的大片| 80岁老熟妇乱子伦牲交| 久久久久久久久久久丰满| 亚洲精品中文字幕在线视频 | 国产色爽女视频免费观看| 麻豆成人午夜福利视频| 少妇裸体淫交视频免费看高清| 舔av片在线| 校园人妻丝袜中文字幕| av在线播放精品| 在线观看免费高清a一片| 国产成人a∨麻豆精品| 美女黄网站色视频| 高清日韩中文字幕在线| 日韩欧美精品v在线| 日韩一本色道免费dvd| 亚洲精品亚洲一区二区| 我的老师免费观看完整版| 成年版毛片免费区| 欧美日韩综合久久久久久| 欧美区成人在线视频| 久久久久久久久久人人人人人人| 免费人成在线观看视频色| 国产综合懂色| 精品一区二区三卡| kizo精华| 身体一侧抽搐| 亚洲综合色惰| 最近中文字幕高清免费大全6| 国产视频内射| 波多野结衣巨乳人妻| 国产乱人视频| 精品久久久久久久久av| 久久久国产一区二区| 九九久久精品国产亚洲av麻豆| 男女下面进入的视频免费午夜| 国产精品无大码| 黄片wwwwww| 九九久久精品国产亚洲av麻豆| 爱豆传媒免费全集在线观看| 国产男人的电影天堂91| 亚洲av福利一区| 国产成人福利小说| 国产视频首页在线观看| 国产一区二区亚洲精品在线观看| 久久久久久久久大av| 亚洲精品亚洲一区二区| 亚洲精品视频女| 午夜福利高清视频| 身体一侧抽搐| 日本-黄色视频高清免费观看| 三级国产精品欧美在线观看| 22中文网久久字幕| 一区二区三区高清视频在线| 我的老师免费观看完整版| 免费无遮挡裸体视频| 国产探花极品一区二区| 亚洲无线观看免费| 久久精品国产亚洲av涩爱| 亚洲性久久影院| 中国美白少妇内射xxxbb| 欧美激情国产日韩精品一区| 欧美变态另类bdsm刘玥| 天堂网av新在线| 精品久久久久久久久久久久久| 亚洲久久久久久中文字幕| 国产久久久一区二区三区| 欧美成人午夜免费资源| 久久久久久久久久久丰满| 伊人久久国产一区二区| 日日啪夜夜爽| 蜜桃久久精品国产亚洲av| 亚洲精品中文字幕在线视频 | 午夜日本视频在线| 寂寞人妻少妇视频99o| 成人亚洲欧美一区二区av| 美女脱内裤让男人舔精品视频| 高清午夜精品一区二区三区| 亚洲不卡免费看| 国产亚洲av嫩草精品影院| 精品久久久久久久末码| 亚洲精品影视一区二区三区av| 插阴视频在线观看视频| 男插女下体视频免费在线播放| 能在线免费看毛片的网站| 亚洲va在线va天堂va国产| 最近手机中文字幕大全| 国模一区二区三区四区视频| 最近手机中文字幕大全| 精品欧美国产一区二区三| 99久国产av精品国产电影| 亚洲欧美中文字幕日韩二区| 秋霞在线观看毛片| 中文字幕制服av| 午夜久久久久精精品| 欧美一级a爱片免费观看看| 国产亚洲精品av在线| 免费大片黄手机在线观看| 一个人看视频在线观看www免费| 白带黄色成豆腐渣| 你懂的网址亚洲精品在线观看| 国产黄片美女视频| 精品酒店卫生间| 大话2 男鬼变身卡| 国产黄频视频在线观看| 3wmmmm亚洲av在线观看| 亚洲怡红院男人天堂| 国产精品三级大全| 两个人视频免费观看高清| 欧美zozozo另类| 大香蕉97超碰在线| 麻豆精品久久久久久蜜桃| 亚洲久久久久久中文字幕| 久久精品国产鲁丝片午夜精品| 天堂网av新在线| 可以在线观看毛片的网站| 伊人久久精品亚洲午夜| av.在线天堂| 婷婷色麻豆天堂久久| 久久精品夜夜夜夜夜久久蜜豆| 免费不卡的大黄色大毛片视频在线观看 | 男女下面进入的视频免费午夜| 国产精品国产三级国产av玫瑰| av又黄又爽大尺度在线免费看| 欧美日韩视频高清一区二区三区二| 舔av片在线| 一区二区三区免费毛片| 简卡轻食公司| 狠狠精品人妻久久久久久综合| 乱码一卡2卡4卡精品| 波多野结衣巨乳人妻| h日本视频在线播放| 亚洲第一区二区三区不卡| 2021天堂中文幕一二区在线观| 国产精品av视频在线免费观看| 亚洲欧洲日产国产| 男女视频在线观看网站免费| 熟女人妻精品中文字幕| 最近最新中文字幕大全电影3| 老师上课跳d突然被开到最大视频| 午夜免费男女啪啪视频观看| 少妇熟女aⅴ在线视频| 国产熟女欧美一区二区| 只有这里有精品99| 高清日韩中文字幕在线| 免费观看性生交大片5| 在线 av 中文字幕| 内地一区二区视频在线| av专区在线播放| 欧美不卡视频在线免费观看| 亚洲精品乱码久久久久久按摩| 3wmmmm亚洲av在线观看| 国产国拍精品亚洲av在线观看| 女人十人毛片免费观看3o分钟| 久久久久精品性色| 日本三级黄在线观看| 人人妻人人看人人澡| 精品不卡国产一区二区三区| 日韩精品青青久久久久久| 国产欧美另类精品又又久久亚洲欧美| 国精品久久久久久国模美| 国产精品美女特级片免费视频播放器| 内地一区二区视频在线| 国产亚洲精品av在线| 午夜福利在线观看免费完整高清在| 中文欧美无线码| 亚洲国产欧美在线一区| 91在线精品国自产拍蜜月| 精品欧美国产一区二区三| 亚洲av电影不卡..在线观看| 免费av观看视频| 成人亚洲欧美一区二区av| 中文欧美无线码| 亚洲av福利一区| 色播亚洲综合网| 国产黄色视频一区二区在线观看| 成年av动漫网址| 国产激情偷乱视频一区二区| 你懂的网址亚洲精品在线观看| 一级毛片 在线播放| 狂野欧美激情性xxxx在线观看| 高清欧美精品videossex| 天堂影院成人在线观看| 亚洲精品一二三| 自拍偷自拍亚洲精品老妇| 国产精品一区二区三区四区久久| 久久精品久久精品一区二区三区| 国产精品国产三级国产专区5o| 国产色爽女视频免费观看| 欧美激情久久久久久爽电影| av卡一久久| 精品久久久精品久久久| 99热6这里只有精品| 日韩视频在线欧美| 欧美最新免费一区二区三区| 国产三级在线视频| 丰满乱子伦码专区| 亚洲成人久久爱视频| 国产 一区 欧美 日韩| 亚洲经典国产精华液单| 男人舔女人下体高潮全视频| 校园人妻丝袜中文字幕| 三级国产精品片| av专区在线播放| 亚洲欧美一区二区三区黑人 | 免费黄色在线免费观看| 国产色婷婷99| 日韩一本色道免费dvd| 精品久久久久久久久av| 在线免费观看不下载黄p国产| 看免费成人av毛片| 免费观看a级毛片全部| 欧美日韩视频高清一区二区三区二| 国产乱来视频区| 又黄又爽又刺激的免费视频.| 国产毛片a区久久久久| 国产精品无大码| 青青草视频在线视频观看| 少妇熟女欧美另类| 国产伦精品一区二区三区四那| 免费观看在线日韩| 色吧在线观看| 能在线免费看毛片的网站| 亚洲美女搞黄在线观看| 国内精品一区二区在线观看| 亚洲国产精品sss在线观看| 乱人视频在线观看| 精品人妻熟女av久视频| 男女那种视频在线观看| 色网站视频免费| 日韩制服骚丝袜av| 国产黄色小视频在线观看| 美女高潮的动态| kizo精华| 蜜臀久久99精品久久宅男| 久久久久久久午夜电影| 老司机影院成人| videos熟女内射| 夫妻性生交免费视频一级片| 五月伊人婷婷丁香| 99九九线精品视频在线观看视频| 亚洲最大成人av| 一边亲一边摸免费视频| 国产精品熟女久久久久浪| 观看免费一级毛片| 精品国产一区二区三区久久久樱花 | 91狼人影院| 久久久午夜欧美精品| 2018国产大陆天天弄谢| 精品一区二区三区视频在线| 欧美97在线视频| 亚洲欧美精品自产自拍| 在线免费观看的www视频| 男插女下体视频免费在线播放| 久久久久久久亚洲中文字幕| 大陆偷拍与自拍| 免费电影在线观看免费观看| 春色校园在线视频观看| 日韩欧美国产在线观看| 夜夜看夜夜爽夜夜摸| av又黄又爽大尺度在线免费看| 在现免费观看毛片| 久久精品熟女亚洲av麻豆精品 | 我的女老师完整版在线观看| 嫩草影院入口| 亚洲天堂国产精品一区在线| 亚洲国产高清在线一区二区三| 丰满人妻一区二区三区视频av| 久久久色成人| 日韩一区二区视频免费看| 日韩av在线免费看完整版不卡| 丰满乱子伦码专区| 最近的中文字幕免费完整| 日韩在线高清观看一区二区三区| 丰满人妻一区二区三区视频av| 午夜激情欧美在线| 国产有黄有色有爽视频| 在线观看免费高清a一片| 别揉我奶头 嗯啊视频| 国产精品综合久久久久久久免费| 有码 亚洲区| 欧美xxxx性猛交bbbb| 久久这里有精品视频免费| 亚洲激情五月婷婷啪啪| 偷拍熟女少妇极品色| 久热久热在线精品观看| 女人久久www免费人成看片| 九九久久精品国产亚洲av麻豆| 午夜福利视频1000在线观看| 欧美潮喷喷水| av国产免费在线观看| 亚洲国产精品成人久久小说| 欧美不卡视频在线免费观看| 激情五月婷婷亚洲| 亚洲av在线观看美女高潮| 久久精品人妻少妇| 免费观看性生交大片5| 尤物成人国产欧美一区二区三区| 我的老师免费观看完整版| 美女xxoo啪啪120秒动态图| 熟妇人妻不卡中文字幕| 国产午夜福利久久久久久| 91久久精品国产一区二区三区| 美女高潮的动态| 在线a可以看的网站| 床上黄色一级片| 干丝袜人妻中文字幕| 网址你懂的国产日韩在线| 国产精品人妻久久久影院| 国产精品一二三区在线看| 亚洲av二区三区四区| 天堂√8在线中文| 久久精品久久久久久久性| 伦理电影大哥的女人| 国产成人福利小说| 色视频www国产| 成人亚洲精品一区在线观看 | 亚洲欧洲日产国产| 99久国产av精品| 边亲边吃奶的免费视频| 欧美激情在线99| 亚洲美女搞黄在线观看| 国产免费一级a男人的天堂| 天美传媒精品一区二区| 国产高清三级在线| 自拍偷自拍亚洲精品老妇| 六月丁香七月| 日韩一区二区视频免费看| 3wmmmm亚洲av在线观看| 国产精品熟女久久久久浪| 尾随美女入室| 亚洲av免费在线观看| 女人被狂操c到高潮| 99re6热这里在线精品视频| 国产欧美另类精品又又久久亚洲欧美| 在线免费观看不下载黄p国产| 欧美激情久久久久久爽电影| 国产精品一及| 一级黄片播放器| 三级男女做爰猛烈吃奶摸视频| 国产亚洲91精品色在线| 久久人人爽人人片av| 免费无遮挡裸体视频| 国产黄a三级三级三级人| 亚洲精品456在线播放app| 亚洲精品国产av蜜桃| 一级毛片aaaaaa免费看小| 精品国产三级普通话版| 韩国av在线不卡| 精品国产一区二区三区久久久樱花 | 2022亚洲国产成人精品| 久久午夜福利片| 日韩成人伦理影院| 亚洲国产精品专区欧美| 中文乱码字字幕精品一区二区三区 | 淫秽高清视频在线观看| 亚洲精品一区蜜桃| 久久久亚洲精品成人影院| 六月丁香七月| 秋霞伦理黄片| 菩萨蛮人人尽说江南好唐韦庄| av卡一久久| 久久久精品免费免费高清| 少妇丰满av| 好男人在线观看高清免费视频| 不卡视频在线观看欧美| 国产一区亚洲一区在线观看| 精品亚洲乱码少妇综合久久| 久久久久精品久久久久真实原创| 国产单亲对白刺激| 欧美日韩在线观看h| 少妇人妻精品综合一区二区| 男人舔奶头视频| 最近的中文字幕免费完整| 亚洲欧美精品自产自拍| 啦啦啦中文免费视频观看日本| 欧美一级a爱片免费观看看| 哪个播放器可以免费观看大片| 老司机影院成人| 免费大片黄手机在线观看| 国产黄a三级三级三级人| 午夜精品国产一区二区电影 | 久久久久久久国产电影| 男女啪啪激烈高潮av片| 久久午夜福利片| 国产伦在线观看视频一区| 最近最新中文字幕免费大全7| 国产精品国产三级国产专区5o| 九九在线视频观看精品| 青青草视频在线视频观看| 日韩视频在线欧美| 少妇丰满av| 国产乱来视频区| 欧美xxⅹ黑人| 91久久精品国产一区二区成人| 美女被艹到高潮喷水动态| 亚洲国产精品sss在线观看| 精品一区二区三区视频在线| 女人久久www免费人成看片| 国产高清国产精品国产三级 | 亚洲av成人精品一二三区| 国产乱来视频区| av在线观看视频网站免费| 亚洲欧美中文字幕日韩二区| 国内精品美女久久久久久| 丝袜美腿在线中文| 91精品一卡2卡3卡4卡| 国产国拍精品亚洲av在线观看| 欧美高清性xxxxhd video| 日韩精品青青久久久久久| 国产亚洲av嫩草精品影院| www.av在线官网国产| or卡值多少钱| 大又大粗又爽又黄少妇毛片口| 九九久久精品国产亚洲av麻豆| 亚洲一区高清亚洲精品| 国产爱豆传媒在线观看| 18禁裸乳无遮挡免费网站照片| 免费看光身美女| 激情 狠狠 欧美| 可以在线观看毛片的网站| 亚洲一级一片aⅴ在线观看| 99热这里只有精品一区| 2021天堂中文幕一二区在线观| 在线免费十八禁| 精品熟女少妇av免费看| 久久午夜福利片| 国内精品一区二区在线观看| 青春草亚洲视频在线观看| 国产免费又黄又爽又色| 成人国产麻豆网| 久久草成人影院| 亚洲激情五月婷婷啪啪| 国产精品嫩草影院av在线观看| 色网站视频免费| 国产免费视频播放在线视频 | 777米奇影视久久| 亚洲国产精品国产精品| 3wmmmm亚洲av在线观看| 日本黄色片子视频| 久久热精品热| 国产片特级美女逼逼视频| 夫妻性生交免费视频一级片| 女人十人毛片免费观看3o分钟| av在线亚洲专区| 狂野欧美激情性xxxx在线观看| 一级毛片aaaaaa免费看小| 亚州av有码| 色尼玛亚洲综合影院| 3wmmmm亚洲av在线观看| 久热久热在线精品观看| 街头女战士在线观看网站| 少妇人妻精品综合一区二区| 国产高潮美女av| 亚洲精品日本国产第一区| 国产熟女欧美一区二区| 美女内射精品一级片tv| 成年版毛片免费区| 日日摸夜夜添夜夜爱| 少妇熟女aⅴ在线视频| 免费大片18禁| 国产精品不卡视频一区二区| 欧美另类一区| 成人午夜精彩视频在线观看| 亚洲内射少妇av| 久久这里有精品视频免费| 又粗又硬又长又爽又黄的视频| 国产成人a区在线观看| 国产精品国产三级国产av玫瑰| 日日啪夜夜爽| 久久久久久伊人网av| 伊人久久国产一区二区| 九九久久精品国产亚洲av麻豆| 熟妇人妻不卡中文字幕| 日韩不卡一区二区三区视频在线| 欧美 日韩 精品 国产| av免费观看日本| 欧美成人精品欧美一级黄| 日本色播在线视频| 99久国产av精品| 少妇被粗大猛烈的视频| 一级av片app| 日本午夜av视频| 久久久久久久国产电影| 男女下面进入的视频免费午夜| 午夜精品国产一区二区电影 | 亚洲精华国产精华液的使用体验| 亚洲精品国产成人久久av| 看黄色毛片网站| 我要看日韩黄色一级片| 色5月婷婷丁香| 国产黄色小视频在线观看| 国产成人freesex在线| 两个人视频免费观看高清| 黄色一级大片看看| 国产精品久久久久久av不卡| 波野结衣二区三区在线| 插阴视频在线观看视频| 午夜福利在线观看免费完整高清在| 一本一本综合久久| 国产女主播在线喷水免费视频网站 | 秋霞在线观看毛片| 国产极品天堂在线| 又爽又黄无遮挡网站| 亚洲精品成人久久久久久| 亚洲人成网站在线播|