石油学报 ›› 2019, Vol. 40 ›› Issue (7): 798-812.DOI: 10.7623/syxb201907004

• 地质勘探 • 上一篇    下一篇

桂中坳陷下石炭统鹿寨组页岩气成藏条件和有利区预测

周雯1,2, 姜振学1,2, 仇恒远1,2, 金晓春3, 王瑞湖4, 岑文攀4, 唐相路1,2, 李鑫1,2, 王国臻1,2, 曹香妮1,2, 孙玥1,2   

  1. 1. 油气资源与探测国家重点实验室 北京 102249;
    2. 中国石油大学(北京)非常规天然气研究院 北京 102249;
    3. 星光能源国际公司 美国休斯顿 4315;
    4. 广西壮族自治区地质调查院 广西南宁 530023
  • 收稿日期:2018-07-16 修回日期:2019-01-07 出版日期:2019-07-25 发布日期:2019-07-28
  • 通讯作者: 姜振学,男,1963年4月生,1986年获大庆石油学院学士学位,1998年获中国地质大学(北京)矿产普查与勘探专业博士学位,现为中国石油大学(北京)非常规天然气研究院教授,主要从事含油气盆地分析、常规和非常规油气形成与分布、常规和非常规油气资源评价的科研和教学工作。Email:jiangzx@cup.edu.cn
  • 作者简介:周雯,女,1993年9月生,2016年获南京工业大学勘查技术与工程专业学士学位,现为中国石油大学(北京)硕士研究生,主要从事非常规油气地质方面的研究。Email:zwfcg16@163.com
  • 基金资助:

    国家自然科学基金项目(No.41472112)和国土资源部南方页岩气基础地质调查工程项目(12120114046701)资助。

Shale gas accumulation conditions and prediction of favorable areas for the Lower Carboniferous Luzhai Formation in Guizhong depression

Zhou Wen1,2, Jiang Zhenxue1,2, Qiu Hengyuan1,2, Jin Xiaochun3, Wang Ruihu4, Cen Wenpan4, Tang Xianglu1,2, Li Xin1,2, Wang Guozhen1,2, Cao Xiangni1,2, Sun Yue1,2   

  1. 1. State Key Laboratory of Petroleum Resources and Prospecting,Beijing 102249,China;
    2. Unconventional Natural Gas Research Institute,China University of Petroleum,Beijing 102249,China;
    3. Star Energy International Corporation,Houston 4315, USA;
    4. Geological Survey Institute of Guangxi Zhuang Autonomous Region,Guangxi Nanning 530023,China
  • Received:2018-07-16 Revised:2019-01-07 Online:2019-07-25 Published:2019-07-28

摘要:

以桂中坳陷野外考察和岩心观察为基础,结合地球化学、扫描电镜、全岩X射线衍射和低温气体吸附等数据,分析了下石炭统鹿寨组的泥页岩分布、有机地球化学参数、储层特征和含气性等页岩气成藏的地质条件。研究表明,桂中坳陷下石炭统鹿寨组页岩以深水陆棚相沉积为主,富有机质页岩的分布面积广,沉积厚度一般在50~300 m,埋深适中;页岩的有机碳含量大于1.5%,有机质成熟度达到高成熟-过成熟阶段;储层中脆性矿物较多,孔隙空间发育较好,气体吸附性能好,具备页岩气聚集成藏的有利地质条件。结合桂中坳陷剥蚀厚度较大、经历断裂和岩浆活动较多、页岩气保存环境较差等问题综合分析,认为柳州-鹿寨和河池-宜州地区一带为桂中坳陷下石炭统鹿寨组页岩气勘探的有利区。

关键词: 页岩气, 鹿寨组, 有利区, 成藏条件, 桂中坳陷

Abstract:

Based on field investigation and cores observation,in combination with the data of geochemistry,scanning electron microscopy,X-ray diffraction and low-temperature gas adsorption,this study analyzes the geological conditions of shale gas accumulation such as mud shale distribution,geochemical parameters,reservoir characteristics and gas-bearing characteristics in the Lower Carboniferous Luzhai Formation in Guizhong depression. The study shows that the shale from the Lower Carboniferous Luzhai Formation in Guizhong depression is dominated by deep-water continental shelf sediments. The organic-rich shale is distributed widely,generally with the sedimentary thickness from 50m to 300m and moderate buried depth. The organic carbon content in shale is above 1.5%,and the organic matter reaches the high mature or over mature stage. That brittle minerals,pore spaces and gas adsorption performances are well developed in the reservoir indicate favorable geological conditions for shale gas accumulation. In combination with the comprehensive information that Guizhong depression has large erosion thickness,experiencing multi-stage faults and magmatism and poor shale gas preservation environment,it is believed that the Liuzhou-Luzhai area and the Hechi-Yizhou area are favorable areas for shale gas exploration in the Lower Carboniferous Luzhai Formation,Guizhong depression.

Key words: shale gas, Luzhai Formation, favorable area, conditions for hydrocarbon accumulation, Guizhong depression

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