临清坳陷东部高古4井煤成气藏成藏特征  

Hydrocarbon accumulation characteristics of well Gaogu 4 coal-derived gas reservoir in eastern Linqing depression

作　　者：梁钊 周瑶琪 王瑞[2] 刘晨光 朱之锦[3] 张德彬[3] LIANG Zhao;ZHOU Yaoqi;WANG Rui;LIU Chenguang;ZHU Zhijin;ZHANG Debin(School of Geosciences, China University of Petroleum, Qingdao 266580, China;Research Institute of Geological Sciences, ShengLi Oilfield Company, SINOPEC, Dongying 257051, China;Gudao Oil Plant, Shengli Oilfield Company, SINOPEC, Dongying 257231, China)

机构地区：[1]中国石油大学地球科学与技术学院,山东青岛266580 [2]中国石化胜利油田股份有限公司地质科学研究院,山东东营257051 [3]中国石化胜利油田股份有限公司孤岛采油厂,山东东营257231

出　　处：《煤田地质与勘探》2016年第4期46-53,共8页Coal Geology & Exploration

基　　金：全国油气资源战略选区调查与评价项目(2009-GYXQ17)~~

摘　　要：为了查明临清坳陷东部上古生界煤成气藏的勘探潜力,通过多种方法对其成藏条件进行研究并对高古4井煤成气藏进行解剖。结果表明:该区主要发育煤岩和砂泥岩互层沉积,其中煤岩和泥岩可作为烃源岩,干酪根类型多为Ⅲ型和Ⅱ2型,生气为主,砂体可作为储层,与煤岩和泥岩形成储盖组合;高古4井太原组气藏中的天然气主要来源于本组煤岩,储集空间以溶蚀孔隙和微裂缝为主,上覆煤岩封盖和侧向泥岩遮挡形成断块圈闭,定型于新近纪,烃类聚集主要发生于新近纪之后,其它组段砂岩由于侧向遮挡条件不利而未成藏。高古4井煤成气成藏具有"近源自生自储、超晚期生烃成藏、断层侧向遮挡"的特点,发育类似成藏条件的区域应该成为该区今后勘探的重点。In order to find out the exploration potential of the coal-derived gas reservoir of the Upper Paleozoic ofeastern Linqing depression, many ways were used to study its reservoir-forming conditions and analyze Gaogu 4coal-derived gas reservoir. The results show that eastern Linqing depression develops coal and sandstone-mudstone.The coal and dark mudstone could act as source rocks, whose kerogen types are mainly Ⅲ or Ⅱ2, and dominatinglygenerate gas. The sandstones could act as reservoirs and the coal and mudstones could act as cap rocks. The gas inTaiyuan Formation of well Gaogu 4 reservoir is mainly from the coal in the same formation, and the dissolvedpores and micro-fractures are the main pore types. The gas was accumulated in Neogene-Quaternary after theshaping of the trap. The coal-derived gas pool is characterized by “near-source, self-generating, self-accumulating”,“super-late hydrocarbon generating and accumulating” and “favorable lateral barrier condition”. The areas developingsimilar conditions should be the focus for future exploration.

关 键 词：上古生界 煤成气 高古4 井 临清坳陷东部 

分 类 号：P618.13[天文地球—矿床学]