中國(guó)西部疊合盆地深部油氣復(fù)合成藏機(jī)制與富集規(guī)律2013年度報(bào)告

龐雄奇 姜振學(xué) 姜福杰

摘 要：本研究完成的主要工作如下：①深入開(kāi)展了塔北隆起和準(zhǔn)噶爾盆地腹部等地區(qū)的地質(zhì)結(jié)構(gòu)、構(gòu)造應(yīng)力場(chǎng)與古構(gòu)造恢復(fù)和古溫壓場(chǎng)重建的研究工作；②進(jìn)一步闡明了油氣成藏門(mén)限，研究了不同豐度碳酸鹽巖烴源巖特征；以相關(guān)的實(shí)驗(yàn)為基礎(chǔ)，揭示了塔里木盆地臺(tái)盆區(qū)海相油氣的主要成藏相態(tài)特性及其成藏機(jī)制，建立了碳酸鹽巖油氣藏富集模式；③主要研究了塔里木盆地碳酸鹽裂縫發(fā)育控制因素，儲(chǔ)集層類(lèi)型及有利區(qū)帶預(yù)測(cè)，并探討了熱流體與儲(chǔ)層物性的關(guān)系。同時(shí)利用反演技術(shù)建立碳酸鹽儲(chǔ)層模型，以達(dá)到雕刻碳酸鹽儲(chǔ)層縫洞體系的目的；④ 研究了塔里木盆地庫(kù)車(chē)坳陷白堊系沉積、儲(chǔ)層及孔隙演化，準(zhǔn)噶爾盆地二疊系碎屑巖儲(chǔ)層特征及評(píng)價(jià)和有效儲(chǔ)層地球物理預(yù)測(cè)方法；⑤ 開(kāi)展了塔里木盆地深部典型油氣藏的剖析，建立了成藏模式；確定了致密砂巖氣成藏期成藏臨界物性條件；并研究了輸導(dǎo)層非均質(zhì)性、沉積成巖非均質(zhì)性及陸相儲(chǔ)層非均質(zhì)性對(duì)油氣運(yùn)聚的影響；歸納特征地區(qū)油氣分布與斷裂的關(guān)系；⑥在塔里木盆地油氣分布特征及成藏機(jī)制剖析基礎(chǔ)上，深化了研究區(qū)深部碳酸鹽巖油氣富集規(guī)律與成藏主控因素研究，重新評(píng)價(jià)了臺(tái)盆區(qū)油氣資源量；通過(guò)準(zhǔn)南儲(chǔ)層分布和沖斷帶成因機(jī)制厘定，深化南緣下組合油氣成藏機(jī)制認(rèn)識(shí)。

關(guān)鍵詞：成藏主控因素 儲(chǔ)集物性 地質(zhì)改造 地震反演 油氣成藏模式

Abstract：The annual task in 2013： the key factors of controlling the accumulation of deep oil and gas as well as the mechanism. Doing some following research： the intergrowth and association of the deep structural crack， corrosion pores and many types of reservoir space； the compositely additive effect and genetic connection of geological process such as the effect of hydrothermal fluid and Karstification； the Geological and geophysical response of deep carbonate reservoir space； In addition， the other issues relating with accumulation research and deep oil and gas. Accomplished mian works： ① deep research on the geological structure， restoration of tectonic tress field and paleostructure， and reconstruction of paleopressure and paleotemperature in the region of the North Tarim Uplift and the hinterland of Junggar Basin etc.②To further elucidate the hydrocarbon accumulation threshold， studying the characteristics of source rocks in different abundances of carbonate； revealing main accumulation and phase state characteristic and forming mechanism in the Tarim Basin， having builded enrichment mode of carbonate rock reservoir.③the main research are the controlling factors of carbonate fracture， reservoir type ，the prediction of favorable zone and the relationship of thermal fluid and reservoir. At the same time， inversion techniques being used to build a carbonate reservoir model， in order to carve fracture cave and pore system in carbonate reservoir. ④ the cretaceous deposition， evolution of reservoir and pore have studied as well as features and evaluation of Permian clastic rock reservoir and effective reservoir geophysical prediction method. ⑤Deep typical gas reservoirs in the Tarim Basin is analysised， and reservoir pattern is established ；the critical physical conditions of forming period reservoir about compact sandstone gas is determined；at the same time， the influence of conducting layer heterogenelty， sedimentary rock heterogeneity and continental reservoir hetergeneity in oil-gas migration and accumulation are studied； The relationships between distribution of oil-gas and fracture in characteristic area are concluded； ⑥Based on the analysis of forming mechanism and distribution characteristics of the Tarim Basin oil and gas.

Key word：Main factors of hydrocarbon accumulaiton；reservoir property；geological transformation；seismic inversion；hydrocarbon accumulaiton model

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