High-resolution Geochemistry in the Lucaogou Formation,Junggar Basin:An Assessment of Heterogeneous Shale Resources

作     者：SUN Shijie ZHANG Bin WANG Xiaomei TIAN Hua ZHANG Shuichang HOU Guiting SUN Shijie;ZHANG Bin;WANG Xiaomei;TIAN Hua;ZHANG Shuichang;HOU Guiting

作者机构：School of Earth and Space SciencesPeking UniversityBeijing 100871China Research Institute of Petroleum Exploration and DevelopmentPetroChinaBeijing 100083China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报(英文版))

年 卷 期：2025年第99卷第1期

页      面：177-193页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by the National Natural Science Foundation of China(No.U22B6004) the Basic Research and Strategic Reserve Technology Research Project of CNPC(No.2020D-5008-01) the Scientific Research and Technology Development Project of PetroChina Exploration&Development Research Institute(Nos.2021DJ0104 and 2021DJ1808) 

主　　题：unconventional resource heterogeneity Rock-Eval pyrolysis Lucaogou Formation Junggar Basin 

摘      要：Controlled by fluctuating paleoclimates and sedimentary environments,the organic and inorganic features of the Lucaogou Formation exhibit strong heterogeneity in the vertical profile,challenging conventional geological *** elucidate the possible influence of heterogeneity on resource evaluation,a high-resolution sampling approach was applied to an 86.2 cm long core from the Lucaogou Formation of the Jimsar sag in the Junggar Basin.86 sets of samples were micro-drilled from the core and subjected to comparative Rock-Eval *** the classical guidelines,the organic abundance,kerogen type,and maturity of source rocks were exhaustively *** results revealed that organic richness and composition vary significantly under different sedimentary backgrounds,which in turn leads to differential hydrocarbon *** combination of hydrocarbon generation,transport,and expulsion results in peculiar patterns for hydrocarbon accumulation in the Lucaogou *** shales in the Lucaogou Formation serve as both hydrocarbon source rocks and reservoirs,with laminae being migration ***-rich dolomites in the Lucaogou Formation have a considerable hydrocarbon-generating capacity and present the characteristics of self-generation and ***,massive mudstones act purely as hydrocarbon source rocks.