ABSTRACTSOF SELECTED ARTICLES

Study on Improving the Efficiency of Pumping Unit Oil Production System

XU Xiufen，LIHongfei，CAO Ying，XUE Xingchang，ZHOU Yong（NortheastPetroleum University）2019，9（2）：01-04

Abstract:When the pumping unit is in the down-stroke，the balance weights are carried from the low point to the high by the energy which is given by the motor and the energy which is released by sucker rod string dropping，in this process the energy is stored up in the form of potential energy of the balance weight.Afterwards，in the up stroke，the input energy of the motor and the potential energy released by the balance weight dropping are all used to lift the sucker rod string and the liquid column upward，that is，doing work to the suspension point load to lift the liquid to ground.The working process of the system is a process of energy transferring and transforming.On the basis of studying energy transferring and transforming mechanism of the pumping unit oil production system，the calculation method of the input power of the motor and the system efficiency is obtained for the first time.The calculation method gives the function relation between the system efficiency and the pumping parameters of the oil well.The analysis shows that:1.The output power of the system is determined by the oil well output， that is， when the output is determined， the output power is determined.2.Under the condition that the suction pressure requirement of the pump is satisfied，the pump depth can be reduced as much as possible to reduce the input power and increase the system efficiency.3.Under the condition that the oil well output is satisfied，the larger pump diameter and lower pumping speed should be adopted to improve system efficiency.It is of great significance that the work process of pumping oil production system is researched and analyzed by applying work and energy conversion principle.The result provides theoretical and directional guidance for improving the efficiency of the system and realizing the energy saving and reducing consumption of the mechanical oil production system.

Keywords:pumping unit oil production system;system efficiency;work and energy conversion principle;pumping parameters;energy saving

Field Test Application of Super Long Stroke Lifting Technology with One Pumping Unit Driving Two Mutual Balance Production Wells

YI Zhengchang（No.4 Oil Production Plant，Daqing Oilfield Co.，Ltd.）2019，9（2）：05-07

Abstract:In order to make full use of the short distance of the cluster Wells，an energy saving lifting system of"one tow two"is applied in the test.The flexible steel wire rope is used to replace part of the sucker rod，and the flexible steel wire rope moves up and down through the positive and reverse of the motor，and the purpose of one pumping unit running with two Wells at the same time is realized by using the method of one top and one bottom mutual balance.The motor can be flexibly controlled through the intelligent control cabinet，and the maximum stroke can be up to 50 m with 1～12 h-1 continuous adjustable stroke.Field test results show that the average energy saving rate of single well is up to 32.6%，the pump efficiency is improved by 25.1%，and the system efficiency is improved by 11.8%

Keywords:cluster well;super long stroke;lifting system;flexible control;text;energy saving

Feasibility Analysis of Shale Gas Pressure Energy Generation

SHANG Yanhong，ZHOU Bing，LI Chao（Research Institute of Petroleum Machinery Company，Sinopec）2019，9（2）：08-12

Abstract：Shale gas production process requires throttling and decompression treatment of gas tree outlet， and then transported through pipe network to gathering station forcentralized treatment.Throttling and decompression process on the one hand makes enormous pressure energy loss， on the other hand，in order to prevent throttling and cooling ice plugging and prevent hydrate formation，but also need heat preservation treatment，consumption of fuel.If the screw expander and needle valve two-stage decompression process can be used to recover the pressure difference in the process of pressure regulation through the expander can be used to generate electricity for gas well production equipment，it will produce enormous economic benefits.This paper puts forward a scheme of shale gas generation by single screw expander，and analyzes the feasibility of the scheme from the aspects of technology and cost by investigating the present situation of shale gas production in FulingJiaoshiba.

Keywords：shale gas；pressure energy；screw expander；feasibility analysis

Research and Application of Intelligent Servo Control Technology to Improve System Efficiency of Beam Pumping Unit

MENG Xiangtao（Safety and Environmental Protection Department，Zhongyuan Oilfield Branch，Sinopec）2019，9（2）：13-16

Abstract:This essay looks into the factual condition of pumping unit system and try to find out the causes of low pumping efficiency and substantial energy cost.And the essay purposes that the smart servo control technology should be intensively developed to match the particular structure and characteristics of beam pumping unit，by which manner the operation condition of beam pumping unit can be precisely manipulated.And then the beam，the sucker rod and the motor may run in a stable and well-coordinated manner as desired，that may cut the loss of every stroke and lower the load and boost the pumping efficiency and lengthen the expectance of the unit.

Keywords:servo technology;smart control;pumping machine;efficiency.

Discussion and Application of Classified Treatment Method for Low System Efficiency Wells in High Water Cut Oilfield

YIN Tiedong（NO.6 Oil Production Plantin Daqing Oilfield）2019，9（2）：17-19

Abstract：With the continuous development of oil fields and the increasing maturity of energy-saving optimization technology，all major oil fields in China have achieved better results in improving the efficiency of oil well system through optimization.However，the comprehensive optimization management method for all types of low system efficiency wells under high water content conditions is not targeted.To determine the distribution law of low system efficiency wells，and to draw a map of the classification and management measures of low system efficiency wells by calculating the sensitivity of multiple parameters，the optimal method of the measures can be solved.By actively adopting classification and management measures for low system efficiency wells，the system efficiency increased by 14.28 percentage points，and the 100 metric tons of liquid power consumption decreased by 0.10 kWh.

Keywords：systemefficiency;energy saving;control chart;classified management

Discussion on Relation Between Energy-saving Control Technology Application and Load Rate

JIN Huoqing（NO.6 Oil Production Plant inDaqing Oilfield Company）2019，9（2）：20-21

Abstract：At present， there are many kinds and quantities of energy-saving control technologies applied in oil field pumping wells.Field tests show that the power-saving rate of these control technologies is closely related to the load rate of motor.By analyzing the relationship between motor load rate and actual operation efficiency of pumping wells，the influence of motor load rate level on the application effect of energy-saving control technology can be determined.When selecting energy-saving control technology for pumping wells，energysaving technology can be selected according to the actual load rate of the motor.The test results show that the active power-saving rate can be increased by 4.24 percentage points，and the energy consumption loss of the oil wells can be further reduced.

Keywords:pumping wells;load rate;power saving rate;load;power saving

xperiment and Application of New Energy Saving Rod LessOil Recovery Technology for Heavy Oil

MENG Xiaochun，HAN Qiqing，HAN Tao，CHEN Rui（Second Oil Production PlantofDagang Oilfield Company）2019，9（2）：22-26

Abstract:Heavy oil reservoirs in Dagang Oilfield have a large proportion of geological reserves，high crude oil viscosity and high energy consumption.The degree of reservoir filling is low，and the thermal recovery technologies such as steam flooding and fire oil formation can not be matched.Conventional pumping unit lifting needs auxiliary production measures such as electric heating，wellbore water mixing，adding medicine，and so on.The one-time investment and operation and maintenance costs are high.Therefore，high viscous heavy oil reservoirs are in urgent need of new technologies that can reduce investment and reduce energy consumption.Dagang Oilfield has started to promote the research and test of heavy oil cold recovery technology with electric submersible screw pump，which has achieved success and provided an effective technical way for the benefit develop pment of Dagang Oilfield block.

Keywords:pumping electric heating;Cold recovery of heavy oil;electric submersible screw pump

Comprehensive Recovery and Utilization Technology of Fracturing Fluid

WANG Changjun，HUANG Honghui，GUAN Xin（LinpanOil Production Plant of ShengliOilfield Banch）2019，9（2）：27-29

Abstract:With the deepening of oilfield development，low permeability and ultra-low permeability have gradually become the main battlefield for stabilizing production and increasing production.At present，fracturing and production is one of the most widely used development methods for various reservoirs.According to statistics，the amount of fracturing fluid used in Shengli Oilfield is increasing year by year.The annual amount of fracturing fluid used in Shengli Oilfield has reached nearly 50×104m3，and the average amount of single well used is nearly 500 m3.These fracturing fluids not only aggravate the cost of sewage treatment，but also waste resources and aggravate the pollution damage to the oil environment.Fracturing fluid comprehensive recovery and utilization technology focuses on residual fluid after fracturing and flowing back fluid，removing mechanical impurities such as proppant and mud cuttings in residual fluid by technical means，and then classifying the treated fracturing fluid according to its classification，which is applied to profile control of different fracturing wells or water wells to reduce the effluent discharging while utilizing the available effective components in the system.It is a green，low carbon and environmental protection comprehensive recycling technology.

Keywords:fracturing fluid;recovery performance evaluation;field application

Research and Application of Upgrading Technology of Heavy Oil Sewage Effluent Treatment Process

ZHANG Yang，YAO Xiaolin（ZhongyuanPetroleum Engineering Design Co.，Ltd，Sinopec）2019，9（2）：30-33

Abstract:In view of the water quality characteristics of heavy oil wastewater and the wide application of ultrafiltration membrane technology in water treatment，a suitable ultrafiltration process was selected for advanced treatment of heavy oil wastewater.After the biochemical system of"biofilm hydrolysis acidification+biofilm contact oxidation"，the two-stage filtration+ultrafiltration system was added to the sewage treatment process.The monitoring data showed that the average COD convent of heavy oil wastewater after deep treatment was decreased from 148 mg/L to 105 mg/L，continuously and stably met the water effluent standard（COD＜120 mg/L）.The average content of oil and suspended substance was only 0.19 mg/L，0.25 mg/L.It can be seen that this ultrafiltration process can significantly reduce the COD content in the heavy oil wastewater treatment system and the treated water quality meet the requirements of sewage discharge，which is suitable for the advanced treatment of heavy oil sewage.

Keywords:heavy oil sewage；ultrafiltration process；removal of COD；ultrafiltration membrane

Application of Automatic Control Technology in Injection Station

WANG Yongqiang，XU Hong（No.6 Oil Production Plant in Daqing Oilfield Co.，Ltd）2019，9（2）：34-36

Abstract:In the later stage of high water cut oilfield development，polymer injection and subsequent water flooding are the main means of stimulation.But at present，the traditional injection mode of injection station has the problems of difficult control，low regulation efficiency and high energy consumption caused by the mismatch between injection pressure and injection quantity.Aiming at the main links of polymer injection and water distribution，starting from precise flow control and injection allocation，the bottom number of flowmeter is collected by PLC.Through the control of upper computer，the automatic control program is optimized.The precise automatic control of mother liquor injection and single well injection is realized，which improves injection efficiency and reduces injection energy consumption.In addition to improving injection efficiency and reducing human error，the annual energy saving can reach 224 000 kWh.

Keywords：injectionstation;automatic instrument;injection;precision;energy saving

Field Energy Saving Application of Electric Submersible Screw Pump Technology

HOU Liquan，XU Yang,DUAN Zhicheng（The Third Oil Production Plant of DagangOilfield Company）2019，9（2）：37-40

Abstract：Widely used lifting mode in oilfield production mainly includes rod pump， electric submersible centrifugal pump，hydraulic piston pump and ground screw pump，etc。Heavy oil and sand production well are not suitable for rod pump production due to high energy consumption and short production cycle.The structure，working principle and lifting characteristics of electric submersible pump are studied in this paper.Combined with the new technology and supporting measures of electric submersible screw pump，this paper selects representative oil Wells for field test。The analysis of energy saving effect and its extension and application has certain guiding significance for field production。

Key words：electric submersible screw pump；energy saving；application

Evaluation of Energy Saving Effect of Variable Speed Operation of Pumping Units

ZHANG Yunzhao，WANG Guilin，YAO Qingtong，HE Gaiying（The 5th Oil Production Plant of HuabeiOilfield Branch of PetroChina）2019，9（2）：41-43

Abstract：In order to reduce the energy consumption of mechanical production wells in the later stage of oilfield development， especially for oil wells with insufficient liquid supply and low pump efficiency， combined with the construction of smart intelligent oilfield，Promote the application of intelligent control technology for variable speed operation of pumping units，Through the automatic tracing and monitoring of well indicator diagram and production parameters，pump efficiency calculation and frequency conversion control technology.Realize the variable speed operation of the pumping well，save energy and reduce consumption.In the Y oilfield，17 wells are used for the variable speed operation intelligent control technology of the pumping unit.Through testing and analysis，the difference between the variable speed operation of the pumping unit and the parameters of the normal operating parameters is analyzed.Evaluate the application effect of the intelligent control of the shifting operation of the pumping unit.In the low-running state，The average pump efficiency of the 17 pumping units implemented was increased by 12.38 percentage points;The system efficiency increased by 6.63 percentage points on average;The average single-day power saving is 17.95 kWh.

Keywords:variable speed operation;run the powerfrequency;effectivenessevaluation;energy saving;consumption

Optimization Management of Water Injection System Efficiency and Consumption Reduction

MENG Yong，GAO Peng，HAN Feng，LIU Peng，ZHAO Chuang（Hekou production plant ofShengliOilfield）2019，9（2）：44-46

Abstract：The water injection pumping station of oil production enterprises is an important part of the injection and production system.It is not only a large energy consumer but also a large energy saving potential.After more than 40 years of production in a factory in Shengli Oilfield， the pumping station， water injection pump and water injection process related to the water injection system have a certain degree of incompatibility.Therefore，it is of great practical significance to optimize the system to reduce energy consumption.Through systematic investigation of the water injection system and energy consumption，the scientific partial pressure is used to strengthen the efficiency of the plunger pumping station，the water injection pump is matched to improve the efficiency and the water injection station avoids the peak and fill the valley，and the energy consumption of the water injection system is reduced.Energy-saving effect，a total investment of 1.7 million yuan，11 234 kWh of electricity saving after the transformation， annual energy saving of 6.74 million yuan， achieved remarkable results，ensured the smooth operation of the water injection system，the total energy consumption of the whole plant was well controlled.

Keywords：water injection system;energy conservation;efficiency improvement;consumption reduction.

Analysis and Treatment of Low Efficiency Well of Pumping Unit

HOU Lei（No.3 oil production plant Daqing Oilfield Co.，Ltd）2019，9（2）：47-49

Abstract:in order to clarify the system efficiency analysis method and governance countermeasures，this paper analyzes the system efficiency from the three aspects of output，liquid level，consumption of power，gives the corresponding governance countermeasures for the reasons of low efficiency，and combined with the specific situation of the oil well analysis and governance.To reduce the consumption of power，improve the efficiency of the system.It provides a method for inefficient well management.

Keywords:System efficiency；Analyze;output；Liquid level;Consumed power.

Application of Automatic Instrument，Instrument and Digital Oilfield Construction in Oil Field Production and Energy Conservation

QIZhaoqing（Daqing Oilfield Automation Instrument Co.，Ltd）2019，9（2）：50-52

Abstract|:in recent years，the industrial production technology has developed rapidly and rapidly，the use of automation instrumentation equipment has become more and more widespread，and it has played a significant role in the petroleum industry.However，the large number of automated instrumentation and instrumentation arrangements and applications will consume huge energy resources.It is difficult to meet the development requirements of environmental protection and energy conservation in China.Therefore，for the better development of oil fields，we need to develop more environmentally friendly and energy-efficient instruments and formulate more mature plans to meet the needs of oil field production while achieving environmental protection and energy conservation goals.

Keywords:oil field production;environmental protection;energy conservation;automatic instruments;instruments

Application of Derrick Pumping Unit in Sabei Oilfield

KONGLinglu（NO.3Oil Production Plant inDaqing Oilfield）2019，9（2）：53-56

Abstract:Derrick pumping unit has simple structure， and can fulfill intratelluric pumping， high volume lift，wide range of adjustment strokes per minute，energy-saving and intermittent pumping.Derrick pumping unit should be ideal pumping unit during high water cut stage.Conventional beam pumping unit consumes much more energy， and has more complicated power transmission mechanisms.If ever by improving the structure，it will inevitably add an additional loss.For the past few years，more and more derrick pumping unit was being applicated in Sabei oilfield，each pumping unit and technology has its advantage.Through analysis of structural characteristic，applicated scope of production，statistics of energy consumption amid several derrick pumping units， summarize the scope and energy saving effect of the derrick pumping unit， provide technical support for its promotion application.

Keywords:pumping unit;derrick;energy-saving;comparation

Maintenance sewage control optimization in High H2S Natural Gas Purifying Device

ZHANG Gangqiang（Natural Gas Purification Plant，Puguang Branch of ZhongyuanOilfiled Company，Sinopec）2019，9（2）：57-60

Abstract：Puguang natural gas purification plant uses high hydrogen sulfide natural gas as raw material.Large amounts of ferrous sulfide are produced during operation.Before device maintenance，passivation must be carried out;otherwise， when the system is open for maintenance， the contact between ferrous sulfide and oxygen will cause spontaneous combustion， resulting in human injury and equipment damage.In addition，small molecules of sulphur alcohol，ammonia nitrogen and other malodorous substances exist in the system，which will cause environmental pollution.Therefore，deodorization should be carried out.Deodorant and passivation require a large number of related agents，consume a large amount of water and produce a large amount of sewage with high COD.Through a lot of analysis and practice，this paper optimizes the deodorization and passivation process，and reduces the wastewater production from the source.The application results show that the economic benefits are obvious.

Keywords：hydrogen sulfide；ferrous sulfide；passivation；deodorization；sewage;economicbenefits

Research and Application of hydraulic Oil discharge device for Environmental Protection

LIU Yong（No.8 oil production plant Daqing Oilfield Co.，Ltd）2019，9（2）：61-62

Abstract:in order to solve the problem of environmental protection construction of crude oil from the tubing to the ground during pump inspection，the hydraulic oil discharging environmental protection device is studied.The device consists of an upper joint，an outer cylinder，a sliding sleeve，a pin，a seal ring and a drain hole，and is mounted on the upper part of the pumping pump.It can be opened by pressing the tubing when checking the pump，so that the crude oil in the tubing can be released into the wellbore.Crude oil does not take to the ground to achieve environmental protection construction.The field test shows that it can be used in vertical well and inclined well without the influence of wax deposit and sucker rod breakage.It has the advantages of simple structure， convenient operation， good sealing performance，safe and reliable oil discharge and so on.It is of positive significance to the construction of oil field environmental protection operation and has broad prospect of popularization and application.

Keywords:downhole operation;oil discharger;environmental protection construction;positive pressure

The Popularization and Application of HY Super High Strength Sucker Rod in WennanOilfield

WANG Yuehua（Technology Research Institute of No.4 Oil Production Plant，ZhongyuanOilfield branch，Sinopec）2019，9（2）：63-65

Abstract:In view of many limiting factors such as leading to the pumping well overloading，high demand for ground lifting equipment，high energy consumption of applying HY level high strength sucker rod in low level and low productivity wells of WennanOilfield.To meet the energy saving and consumption reduction of oil Wells and reduce the cost of ground equipment，quote the technology of HY level high strength sucker rod deep pumping.Introduce the performance parameters of HY level high strength sucker rod in contrast with HL level in the aspect of technical analysis， because of the better performance of the former， two stage assembly come true in the design of wells.HY level high strength sucker rod was designed six times to deep pumping in 2014 in Wennanoilfied，the biggest pump deep was 3000m，effect was remarkable，pump inspection period extended，investment in equipment reduced， energy was saved， the cost of production run and maintenance reduced，production increased.HY level high strength sucker rod has started to promote and apply step by step in deep pumping wells since 2015.

Keywords:HY level high strength sucker rod； save energy； 4 inch casing；sidetracking wells

Application of High Power Permanent Magnet Motor in Water Injection and Gathering and Transportation System

WANG Dongsheng，YIN Qiang，LIU Chengxiang（ZhanxiOil Production Plant of ShengliOil Company）2019，9（2）：66-68

Abstract:At present，a large number of Y series and YB series motors are still in use in the water injection and gathering system of Zhuangxi Oil Production Plant， which are inefficient in design and high in loss， and have been listed in the national eliminated product catalogue.Permanent magnet synchronous motor（PMSM）has the advantages of simple structure，light weight，low loss，high efficiency and high power factor.Recently，with the maturity of production technology of high-power PMSM over 55 kW，in order to improve the energy efficiency level of equipment and reduce power loss，Zhuangxi Oil Production Plant has developed high-power PMSM in water injection and gathering system.Applied research to achieve the purpose of energy saving.

Keywords:high power permanent magnet motor;water injection system;gathering system