鄂西渝东区油气保存条件分析  

HYDROCARBON PRESERVATION CONDITIONS IN WEST HUBEI AND EAST CHONGQING

作　　者：邓模[1] 吕俊祥[1] 潘文蕾[1] 翟常博[1,2] 闻涛[3] 朱义清[4] 杨潇[1] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所,江苏无锡214151 [2]中国地质大学能源学院,北京100083 [3]中国石油化工股份有限公司勘探南方分公司勘探开发科学研究院,成都610000 [4]中国地质大学资源学院石油系,武汉430074

出　　处：《石油实验地质》2009年第2期202-206,共5页Petroleum Geology & Experiment

基　　金：全国油气资源战略选区调查与评价项目(XQ-2007-02)

摘　　要：通过对鄂西渝东区盖层展布及封盖性能、主要断层封闭性和钻井地层水化学环境等的分析认为,该区保存条件存在差异性。石柱复向斜主体因盖层完整、特别是下三叠统嘉陵江组膏盐岩盖层连片分布且断裂构造不发育而保存条件最好;方斗山、齐岳山潜伏构造保存条件较好,但位于西侧的方斗山潜伏构造要好于齐岳山潜伏构造;复背斜主体因区域大断层的开启及区域盖层的剥蚀而保存条件较差;利川复向斜南部盖层较完整,保存条件较好,而北部较差。Analyses of distribution and preservation characters of sealing rocks, sealing ability of main faults and chemical environment of formation water in wells have indicated that, there are differences of hydrocarbon preservation conditions among different regions in West Hubei and East Chongqing. Due to occurrence of complete sealing sequence, especially wide distribution of gypsum seal of the Lower Triassic Jialingjiang Formation and poor development of fault structures, the Shizhu synclinorium is most favorable for hydrocarbon preservation. The Fangdoushan and Qiyueshan buried structures are both favorable for preservation, with the former better than the latter. Main part of synclinorium shows poor preservation conditions as the result of regional large fault opening and regional seal erosion. In the south of Lichuan synclinorium, seals are relatively complete and preservation conditions are good; while in the north, it is poor.

关 键 词：潜伏构造 断层封闭 盖层展布 保存条件 鄂西渝东 

分 类 号：TE122.34[石油与天然气工程—油气勘探]