四川盆地自流井组页岩油气地质特征及富集规律  

Geological characteristics and enrichment regular patterns of shale oil and gas at Ziliujing Formation in Sichuan Basin

作　　者：刘忠宝 LIU Zhongbao(State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development,Beijing 102206,China;Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology,Beijing 102206,China;Sinopec Petroleum Exploration and Production Research Institute,Beijing 102206,China)

机构地区：[1]页岩油气富集机理与高效开发全国重点实验室,北京102206 [2]中国石化页岩油气勘探开发重点实验室,北京102206 [3]中国石化石油勘探开发研究院,北京102206

出　　处：《世界石油工业》2024年第3期35-47,共13页World Petroleum Industry

基　　金：国家科技重大专项课题“陆相层系页岩气勘探潜力评价”(2017ZX05036004);中国石油化工股份有限公司基础前瞻性研究课题“混积型和基质型陆相页岩油优质储层发育机理”(P23240-3)。

摘　　要：为研究中高成熟陆相页岩油气形成条件及富集规律,以四川盆地自流井组东岳庙段与大安寨段两套富有机质页岩为研究对象,采用岩石薄片、全岩X衍射、有机碳含量、岩石热解、干酪根碳同位素、氩离子抛光-扫描电镜、物性等多种实验测试技术方法,基于岩相、烃源、储集、保存及含油气性等研究,总结了中高成熟陆相页岩油气富集规律。研究结果表明:研究区陆相富有机质页岩岩相及组合类型多样,以富含方解石介壳纹层为特点;页岩物性明显好于介壳灰岩与粉砂岩夹层,其中以黏土质页岩与介壳灰质页岩宏观物性与微观孔隙(类型、结构)最佳;整体保存条件好,具有构造稳定、高压-超高压特征,油气同产。综合分析认为自流井组陆相富有机质页岩具有“两相控烃控储、压缝控富控产”的页岩油气富集规律。基于目前盆地重点探区及相邻层段的勘探实践,提出加强重点地区地质-开发-工程一体化技术攻关,加强非常规页岩油气-常规油气整体综合评价研究与勘探部署。In order to find out the formation conditions and enrichment rules of medium or high mature continental shale oil and gas.Taking the two sets of organic-rich shale that rest on Dongyuemiao member and Daanzhai member of Ziliujing Formation in Sichuan Basin as the research object,using variety of experimental testing methods,such as rock thin section,whole-rock X-ray diffraction,organic carbon content,rock pyrolysis,kerogen carbon isotope,SEM image observation,physical properties,etc.The enrichment rules of medium or high mature continental shale oil and gas are summarized,which based on the research of lithofacies,hydrocarbon source,reservoir,preservation and oil and gas bearing properties.The result shows that the lithofacies and combination of continental organic-rich shale in the study area are various,characterized by calcite-rich shell laminae;the physical properties of shale are obviously better than the shell shale with interlaminated siltstone,among the macroscopic physical properties and microscopic pores(types and structures)of clay shale and shell limestone shale are best;the whole observation conditions are good,having the characteristics of stable structure and high pressure-ultra-high pressure,and simultaneous oil and gas production.Comprehensive analysis shows that continental organic-rich shale has the enrichment rules of“lithofacies and organic-facies control the hydrocarbon source and reservoir,pressure and micro-fracture control enrichment and production of shale oil”.Based on current exploration practices in key area and adjacent strata in Sichuan Basin,proposing highlight advice:firstly,strengthening the unifying technology of geology-development-engineering in key areas;secondly,strengthening comprehensive evaluation research and exploration deployment of unconventional shale oil and gas-conventional oil and gas.

关 键 词：陆相页岩油气 有机显微组分 页岩储层 有机质孔隙 保存条件 自流井组 

分 类 号：TE122.2[石油与天然气工程—油气勘探]