Advances and trends of non-marine shale sedimentology:A case study from Gulong Shale of Daqing Oilfield,Songliao Basin,NE China  

作　　者：SUN Longde ZHU Rukai ZHANG Tianshu CAI Yi FENG Zihui BAI Bin JIANG Hang WANG Bo 

机构地区：[1]National Key Laboratory for Multi-resource Collaborated Green Development of Continental Shale Oil,Daqing 163712,China [2]PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China [3]CNPC Key Laboratory of Oil and Gas Reservoirs,Beijing 100083,China [4]Peking University,Beijing 100871,China

出　　处：《Petroleum Exploration and Development》2024年第6期1367-1385,共19页石油勘探与开发(英文版)

基　　金：Supported by the National Natural Science Foundation of China(42090020,42090025);Enlisting and Leading Project of Heilongjiang Province(2021ZXJ01A09);PetroChina Scientific Research and Technological Development Project(2019E2601)。

摘　　要：This study took the Gulong Shale in the Upper Cretaceous Qingshankou Formation of the Songliao Basin,NE China,as an example.Through paleolake-level reconstruction and comprehensive analyses on types of lamina,vertical associations of lithofacies,as well as stages and controlling factors of sedimentary evolution,the cyclic changes of waters,paleoclimate,and continental clastic supply intensity in the lake basin during the deposition of the Qingshankou Formation were discussed.The impacts of lithofacies compositions/structures on oil-bearing property,the relation between reservoir performance and lithofacies compositions/structures,the differences of lithofacies in mechanical properties,and the shale oil occurrence and movability in different lithofacies were investigated.The insights of this study provide a significant guideline for evaluation of shale oil enrichment layers/zones.The non-marine shale sedimentology is expected to evolve into an interdisciplinary science on the basis of sedimentary petrology and petroleum geology,which reveals the physical,chemical and biological actions,and the distribution characteristics and evolution patterns of minerals,organic matter,pores,fluid,and phases,in the transportation,sedimentation,water-rock interaction,diagenesis and evolution processes.Such research will focus on eight aspects:lithofacies and organic matter distribution prediction under a sequence stratigraphic framework for non-marine shale strata;lithofacies paleogeography of shale strata based on the forward modeling of sedimentation;origins of non-marine shale lamina and log-based identification of lamina combinations;source of organic matter in shale and its enrichment process;non-marine shale lithofacies classification by rigid particles+plastic components+pore-fracture system;multi-field coupling organic-inorganic interaction mechanism in shale diagenesis;new methods and intelligent core technology for shale reservoir multi-scale characterization;and quantitative evaluation and intelligent analysis system o

关 键 词：non-marine shale sedimentology lithofacies paleogeography of shale strata organic-inorganic interaction mechanism intelligent core technology Cretaceous Qingshankou Formation Gulong Shale Songliao Basin 

分 类 号：P618.13[天文地球—矿床学]