雪峰山西侧埃迪卡拉系陡山沱组页岩气成藏体系评价

Evaluation of accumulation system for shale gas of Doushantuo Formation in western Xuefeng Mountain

李旭兵 陈绵琨 刘安 危凯 王保忠

Li Xubing Chen Miankun Liu An Wei Kai Wang Baozhong

武汉地质矿产研究所, 武汉 430205 2. 中国石化 江汉油田分公司 勘探开发研究院, 武汉 430223

Wuhan Institute of Geology and Mineral Resources, Wuhan, Hubei 430205, China 2. Exploration and Production Research Institute of SINOPEC Jianghan Oilfield Company, Wuhan, Hubei 430223, China

页岩气是一个很有潜力的非常规油气勘探新领域，资源丰富，属于“持续式”聚集的非常规天然气。目前我国还没有大规模开展页岩气的资源评价。对雪峰山西侧地区埃迪卡拉系陡山沱组碳质页岩的厚度、总有机碳含量、有机质类型、成熟度、裂缝、孔隙度、渗透率、矿物组成、深度及烃源岩生烃强度等页岩气藏因素进行了研究分析。结合陡山沱组地层对比以及岩相古地理特征，利用页岩气“甜点”的评价体系，指出雪峰山西侧地区埃迪卡拉系陡山沱组页岩气的有利勘探区为桑植—石门复向斜及宜都鹤峰背斜区，可以作为雪峰山西侧地区页岩气的战略突破区。

Shale gas is an unconventional resource with great exploration potential and continuous accumulation. At present, our country has not carried out large-scale shale gas resource evaluation. The accumulation factors such as TOC, organic matter type, maturity, crack, porosity, permeability, brittle mineral content, thickness and depth of shale, and hydrocarbon potentials are analyzed in this paper. Based on the study of stratigraphic correlation and paleogeographic characteristics of the Doushantuo Formation, and the key parameters for shale gas sweet spots, the results suggest that the Sangzhi-Shimen synclinorium and the Yidu Hefeng anticline zone are the most favorable areas for shale gas exploration which will become strategic breakthrough areas in the western Xuefeng Mountain.

中国地质调查局项目“桑植—石门及邻区油气地质综合调查及地层对比研究”（1212011220745）资助。

https://doi.org/10.11781/sysydz201402188