地质学报2018，Vol.92Issue(6)：1313-1323,11.
中国南方海相页岩气选区关键参数探讨
Evaluation Parameters Study of Selecting Favorable Shale Gas Areas in Southern China
摘要
Abstract
Marine shale gas in southern China is characterized by high thermal evolution and tectonic movements.Based on the development and exploration of shale gas in southern China,this study proposed a preferential method that takes the preservation condition as the core and the geological evaluation as an emphasis,coupled with consideration of economic evaluation.This method screened out some key evaluation index,such as total organic carbon (TOC) content and thermal maturity and pressure coefficient,which are suitable for evaluating favorable areas of shale gas in southern China.TOC content is the material basis for shale gas enrichment and accumulation;thus selecting favorable area should be the shale formation with high TOC content (TOC＞ 2％) in thick shale section.Excessive maturity has a negative impact on shale gas enrichment and accumulation,and selecting favorable area should be on the basis of "finding a low Ro value in high place",i.e.looking for the areas with high pressure coefficient in the intensive tectonic setting.Pressure coefficient can directly reflect the preservation degree of shale gas,and the higher the pressure coefficient indicated the better preservation degree of shale gas.Taking the exploration of shale gas in the Niutitang Formation in northwestern Hunan Province as an example,it is believed that the Niutitang shale gas has good prospects for exploration and development,but the high thermal maturity and poor preservation conditions (low pressure coefficient) are the major risks for enrichment and high yield of shale gas in northwestern Hunan Province.关键词
四川盆地及其周缘/页岩气/有利区/有机质含量/成熟度/压力系数Key words
Sichuan Basin and its periphery/shale gas/favorable area/total organic carbon/thermal maturity/pressure coefficient引用本文复制引用
郗兆栋,唐书恒,王静,张振,李彦朋,龚明辉,肖何琦..中国南方海相页岩气选区关键参数探讨[J].地质学报,2018,92(6):1313-1323,11.基金项目
本文为国家科技重大专项项目35(编号2017ZX05035)资助的成果. （编号2017ZX05035）
