Key factors controlling shale oil enrichment in saline lacustrine rift basin:implications from two shale oil wells in Dongpu Depression,Bohai Bay Basin  

作　　者：Tao Hu Xiong-Qi Pang Fu-Jie Jiang Qi-Feng Wang Guan-Yun Wu Xiao-Han Liu Shu Jiang Chang-Rong Li Tian-Wu Xu Yuan-Yuan Chen 

机构地区：[1]State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China [2]College of Geosciences,China University of Petroleum,Beijing 102249,China [3]Energy&Geoscience Institute,University of Utah,Salt Lake City,UT 84108,USA [4]Research Institute of Exploration and Development,Zhongyuan Oilfeld Company,SINOPEC,Puyang,Henan 457001,China

出　　处：《Petroleum Science》2021年第3期687-711,共25页石油科学（英文版）

基　　金：This study was fnancially supported by the China Postdoctoral Science Foundation(2019M660054);Science Foundation of China University of Petroleum(Beijing)(2462019BJRC005);Strategic Cooperation Technology Projects of CNPC and CUPB(ZLZX2020-01-05);Natural Science Foundation of China(41872148,41872128);NSFC Basic Research Program on Deep Petroleum Resource Accumulation and Key Engineering Technologies(U19B6003-02);the Science Projects of the Sinopec Zhongyuan Oilfeld Company(P15022).

摘　　要：Comparative analyses of petroleum generation potential,reservoir volume,frackability,and oil mobility were conducted on 102 shale cores from the Dongpu Depression.Results show the shale has high organic matter contents composed of oil-prone type I and type II kerogens within the oil window.Various types of pores and fractures exist in the shale,with a porosity of up to 14.9%.The shale has high brittle mineral contents,extensive fractures,and high potential for oil mobility due to high seepage capacity and overpressure.Although the petroleum generation potential of the shale at Well PS18-8 is relatively greater than that at Well PS18-1,oil content of the latter is greater due to the greater TOC.The porosity and fracture density observed in Well PS18-1 are greater and more conducive to shale oil enrichment.Although the shales in Wells PS18-1 and PS18-8 have similar brittle mineral contents,the former is more favorable for anthropogenic fracturing due to a higher preexisting fracture density.Besides,the shale at Well PS18-1 has a higher seepage capacity and overpressure and therefore a higher oil mobility.The fracture density and overpressure play key roles in shale oil enrichment.

关 键 词：Petroleum generation potential Reservoir volume Frackability Oil mobility Shale oil enrichment Dongpu Depression Saline lacustrine rift basin 

分 类 号：TE34[石油与天然气工程—油气田开发工程]