Enrichment factors of movable hydrocarbons in lacustrine shale oil and exploration potential of shale oil in Gulong Sag,Songliao Basin,NE China

作     者：ZHAO Wenzhi BIAN Congsheng LI Yongxin ZHANG Jinyou HE Kun LIU Wei ZHANG Bin LEI Zhengdong LIU Chang ZHANG Jingya GUAN Ming LIU Shijul 

作者机构：ZWZ Academician Research StudioPetroChina Research Institute of Petroleum Exploration&DevelopmentBeijing 100083China PetroChina Research Institute of Petroleum Exploration&DevelopmentBeijing 100083China Exploration and Development Research Institute of PetroChina Daqing Oilfield CompanyDaqing 163712China 

出 版 物：《Petroleum Exploration and Development》 (石油勘探与开发（英文版）)

年 卷 期：2023年第50卷第3期

页      面：520-533页

核心收录：

学科分类：0820[工学-石油与天然气工程] 081803[工学-地质工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

基　　金：Supported by the National Natural Science Foundation of China(U22B6004) the PetroChina Research Institute of Petroleum Exploration&Development Project(2022yjcq03) 

主　　题：Gulong Sag continental shale oil movable hydrocarbon enrichment factor enrichment zone/interval evaluation material basis component flow engineering-associated factor 

摘      要：The geological characteristics and production practices of the major middle-and high-maturity shale oil exploration areas in China are *** with laboratory results,it is clear that three essential conditions,*** initial production,commercial cumulative oil production of single well,and large-scale recoverable reserves confirmed by the testing production,determine whether the continental shale oil can be put into large-scale commercial *** quantity and quality of movable hydrocarbons are confirmed to be crucial to economic development of shale oil,and focuses in evaluation of shale oil enrichment area/*** evaluation indexes of movable hydrocarbon enrichment include:(1)the material basis for forming retained hydrocarbon,including TOC2%(preferentially 3%-4%),and typeⅠ-Ⅱkerogens;(2)the mobility of retained hydrocarbon,which is closely related to the hydrocarbon composition and flow behaviors of light/heavy components,and can be evaluated from the perspectives of thermal maturity(Ro),gas-oil ratio(GOR),crude oil density,quality of hydrocarbon components,preservation conditions;and(3)the reservoir characteristics associated with the engineering reconstruction,including the main pore throat distribution zone,reservoir physical properties(including fractures),lamellation feature and diagenetic stage,***,13 evaluation indexes in three categories and their reference values are *** evaluation indicates that the light shale oil zones in the Gulong Sag of Songliao Basin have the most favorable enrichment conditions of movable hydrocarbons,followed by light oil and black oil zones,containing 20.8×10^(8) t light oil resources in reservoirs with R_(0)1.2%,pressure coefficient greater than 1.4,effective porosity greater than 6%,crude oil density less than 0.82 g/cm^(3),and GOR100 m/m^(3).The shale oil in the Gulong Sag can be explored and developed separately by the categories(resource sweet spot,engineering sweet