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中国南方下寒武统牛蹄塘组页岩气高效勘探开发储层地质参数
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  • 英文篇名:Reservoir geological parameters for efficient exploration and development of Lower Cambrian Niutitang Formation shale gas in South China
  • 作者:王朋飞 ; 姜振学 ; 韩波 ; 吕鹏 ; 金璨 ; 张昆 ; 李鑫 ; 李廷微
  • 英文作者:Wang Pengfei;Jiang Zhenxue;Han Bo;LüPeng;Jin Can;Zhang Kun;Li Xin;Li Tingwei;Geoscience Documentation Center,CGS;National Geological Library of China;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum;Unconventional Natural Gas Research Institute,China University of Petroleum;School of Energy Resource,China University of Geosciences;Sinopec Shanghai Offshore Petroleum Company;
  • 关键词:中国南方 ; 下寒武统 ; 牛蹄塘组页岩 ; 高效勘探开发 ; 储层地质参数
  • 英文关键词:South China;;Lower Cambrian;;Niutitang Formation shale;;exploration and development;;reservoir parameters
  • 中文刊名:SYXB
  • 英文刊名:Acta Petrolei Sinica
  • 机构:中国地质调查局地学文献中心;中国地质图书馆;中国石油大学油气资源与探测国家重点实验室;中国石油大学非常规天然气研究院;中国地质大学能源学院;中国石油化工股份有限公司上海海洋油气分公司;
  • 出版日期:2018-02-15
  • 出版单位:石油学报
  • 年:2018
  • 期:v.39
  • 基金:中国地质调查局地学情报综合研究项目(121201015000150002);; 南方页岩气基础地质调查工程项目(12120114046701)资助
  • 语种:中文;
  • 页:SYXB201802003
  • 页数:11
  • CN:02
  • ISSN:11-2128/TE
  • 分类号:28-38
摘要
近年来对中国南方下寒武统牛蹄塘组页岩气进行了大规模勘探开发,但效果并不理想,只有四川盆地井研—犍为及湖北宜昌地区钻井见商业气流。为了明确四川盆地周缘牛蹄塘组页岩气勘探开发失利原因并为后续高效勘探开发提供储层地质参数指标,在此次研究中,采用有机碳热解分析、等效镜质体反射率测定及聚焦离子束扫描电子显微镜(FIB-SEM)等实验方法并以四川盆地周缘渝东北地区下寒武统牛蹄塘组页岩储层为例进行分析。结果表明:渝东北地区牛蹄塘组页岩样品的TOC平均含量达3.1%;等效镜质体反射率分布范围在3.0%~4.0%,热演化程度已达到过成熟—变质期阶段。由于热演化程度过高导致研究区下寒武统牛蹄塘组页岩样品有机质孔隙不发育,发育以粒间孔隙和粒内孔隙为主要类型的微纳米孔隙。热演化程度控制了页岩中的干酪根及滞留液态烃的持续生气,同时又控制着页岩有机质孔隙的发育。四川盆地周缘渝东北地区牛蹄塘组页岩的有机质孔隙演化和生烃演化未达到最佳匹配,在页岩有机质孔隙大量发育时期,由于地层未及时抬升,导致储层热演化程度进一步加强,有机质孔隙数量急剧减少,页岩气在生成后失去有机质孔隙这一有效赋存空间而散失。针对中国南方下寒武统牛蹄塘组页岩气的高效勘探开发应寻找热演化程度适中(2.0%        South China has carried out large-scale exploration and development for the shale gas of the Lower Cambrian Niutitang Formation,but the effect is not ideal.At present,only the Sichuan Basin Jingyan-Qianwei and Yichang,Hubei,see the commercial air flow.In order to clarify the failure of Niutitang Formation shale gas exploration and development and provide reservoir geological parameters for subsequent efficient exploration and development,in this study,the analysis of organic carbon pyrolysis,experimental method for determining the equivalent vitrinite reflectance and focused ion beam scanning electron microscope and the results show that the TOC content of the shale samples in the Niutitang Formation in northeastern Chongqing is 3.3%;the equivalent vitrinite reflectance distribution ranged from 3.0% to 4.0%,and the degree of thermal evolution has reached over maturity and metamorphic stage.Because of the over degree of thermal evolution,the pores of the organic matter of shale are not developed,and the interparticle pores and intraparticle pores are the main types of micro-nano pores.The degree of thermal evolution controls the persistent gas production of kerogen and trapped liquid hydrocarbons in the shale,while controlling the organic matter pores development of shale.The hydrocarbon generation evolution and organic matter pore evolution of the Niutitang shale in the northeastern Chongqing area did not achieve the best match.During the massive development of organic matter pores of shale,the thermal evolution of reservoirs is further enhanced because the strata are not uplifted in time and the number of or-ganic matter pores is drastically reduced due to excessive evolution,and the shale gas lost the effective storage space in the first time after the formation.For efficient exploration and development of Lower Cambrian Niutitang shale in South China,it is found that the moderate thermal maturity(2.0%
引文
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