冀中坳陷文安斜坡古生界断块油气藏形成机制  

The Mechanism of Paleozoic Oil-gas Fault-block Pools Formation in Wen’an Slope in the Jizhong Depression

作　　者：王明明[1] 孟元林[1] 刘吉余[2] 王建东[1] 

机构地区：[1]中国地质大学 [2]大庆石油学院

出　　处：《断块油气田》2004年第5期3-5,共3页Fault-Block Oil & Gas Field

摘　　要：文安斜坡古生古储断块油气藏的形成 ,有利条件是渐新世多期岩浆活动使石炭—二叠系煤系烃源层系二次成烃效果显著。古生界具有侧向封堵条件的区域性盖层主要是上石盒子组上段—石千峰组大套泥岩 ,这决定了断块区奥陶系碳酸盐岩风化淋滤带及二叠系大套砂岩储层在反向断层遮挡下能形成断块圈闭。在 5种断层反向遮挡组合中 ,3种能形成有效的圈闭。运用该机制评价出古生界The advantage, in which fault-block oil-gas pools formed in Wen’an slope which’s oil-gas generated from and gathered in Paleozoic stratum, is multiple’ magmatic active in Oligocene epoch which made the action of hydrocarbon generated secondarily in the coal strata of Carboniferous and Permian markedness. Because the main territorial cap rock which could block off hydrocarbon migration in another side of fault in Paleozoic stratum is huge thick mudstone in upper mbr of Shangshihezi group and Shiqianfeng group, this make only backward fault to dip direction can block to form fault-block trap in the reservoir stratum of carbonatite eluvial horizon in Ordovician and thick sandstone in Permian . Three kinds in account of five kinds of combination of backward faults to dip direction could block off to form effective fault-block traps. To use this mechanism, three exploration targets of Paleozoic oil-gas fault-block pools are selected.

关 键 词：冀中坳陷 文安斜坡 古生界 断块 圈闭 油气藏 封盖层 

分 类 号：TE347[石油与天然气工程—油气田开发工程]