黔西北地区构造对下寒武统页岩气藏保存的影响

Influence of Structure of Northwest Guizhou Area on Preservation of Lower Cambrian Shale Gas Reservoirs

付景龙 丁文龙 曾维特 何建华 王哲

FUJinglong DINGWenlong ZENGWeite HEJianhua WANGZhe

中国石油华北油田勘探开发研究院, 河北 任丘 062552 中国地质大学(北京)能源学院, 北京 海淀 100083 页岩气藏资源战略评价国土资源部重点实验室·中国地质大学(北京), 北京 海淀 100083 海南省地质调查院, 海南 海口 570206

Exploration and Development Research Institute of Huabei Oilfield, PetroChina, Renqiu, Hebei 062552, China School of Energy Resources, China University of Geosciences(Beijing), Haidian, Beijing 100083, China Key Laboratory for Shale Gas Exploitation and Assessment, Ministry of Land and Resources, China University of Geosciences(Beijing), Haidian, Beijing 100083, China Hainan Institute of Geological Survey, Haikou, Hainan 570206, China

针对黔西北地区构造条件的复杂性，通过对黔西北地区构造演化特征、褶皱断裂发育分布特征研究，结合本区页岩的沉积环境、厚度、和等，对黔西北地区下寒武统牛蹄塘组页岩气藏的保存条件进行了研究，参照页岩气藏保存条件评价指标，划分出了页岩气藏保存条件的有利区。同时，对其他地区页岩气藏保存条件的研究具有重要的参考价值。认为黔西北地区褶皱断裂非常发育，发育了以隔槽式为主的褶皱和不同期次下4组走向的断裂体系，使页岩气藏的保存条件得到了不同程度的破坏。页岩气藏保存条件有利的地区主要分布在黔西北中部的大方县和黔西县大部分地区、黔西北东北部的桐梓县以及仁怀市部分地区。

Tectonic conditions of Northwest Guizhouare highly complex. The preservation conditions of shale gas reservoirs in Lower Cambrian Niutitang Formation are studied and the favorable preservation condition areas of the shale gas reservoirs are divided with reference to shale gas reservoirs' preservation condition evaluation index. Combined with the tectonic evolution, the development and distribution characteristics of folds and faults, the shale sedimentary environment and thickness, the organic carbon content and the organic matter maturity, etc. in Northwest, Guizhou. Preservation conditions of shale gas reservoirs have important reference values in other areas. The folds and faults are highly developed in Northwest,Guizhou. The folds are mainly trough-like folds,and the faults have four groups of fault systems at different stages and trends. The preservation conditions of shale gas reservoirs are destroyed at different degrees by the above reasons. The favorable preservation condition areas of the shale gas reservoirs are mainly distributed in most parts of the Dafang and Qianxi County in Central of Northwest Guizhou, and some parts of the Tongzi County and Renhuai City in the northeast of Northwest Guizhou.

10.11885/j.issn.16745086.2015.01.08.02