THE TECTONIC EVOLUTION AND RESERVOIR FORMATION IN WENLIU AREA, BOHAIWAN BASIN
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摘要: 文留构造是Es3(2)-Es2期间在中央隆起带背景上因盐聚集而形成的背斜构造,构造翼部因盐滑塌而使圈闭幅度加大.C-P煤系因埋深加大而进入二次生气期,并在约4000m发生初次运移.烃源岩的主体埋深5200~6300m,位于文东和前梨园地区.煤成气以微裂缝-裂隙(断层)网络为主要通道向中央隆起带运移,并在东营运动(Ⅱ幕)期达到最大规模.天然气进入圈闭后,首先充注Es4(3-5)段Ⅰ类和Ⅱ类储层(驱水效率73%~56%),后随着气柱加大驱替压力增加而向Es4(1-2)和Es4(7-8)Ⅲ类储层中扩散,最终驱水效率约为40%.Abstract: Wenliu structure is an anticline caused by salt-gathering on the background of center mole track,it was formed from Es3(2)to Es2.The extent of the trap is enlarged because of the salt-slumping of the wings.With the increase of the burial depth,C-P coal formation began its secondary hydrocarbon generating,and started migrating at depth of 4 000m for the first time.The main source rock was located in Wendong and Qianliyuan areas,with the depth of 5 200~6 300m.Micro-fracture-fault network was the main way for the coal-derived gas to migrate to the center mole track,the migration reached its peak at the age Ed (Ⅱ episode).In the trap,the gas prefered to entering the typeⅠand Ⅱreservoirs in Es4(3-5)(the water-displacement rate is 73%~56%),then with the increase of the gas column and pressure,the gas began to enter the type Ⅲ of reservoir in Es4(1-2 and Es4(7-8),the final water-displacement rate is 40%.
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[1] 朱家蔚,戚厚发.文留煤成气藏的发现及其对华北盆地找气的意义[J].石油勘探与开发,1983,(1). [2] 朱家蔚,许化政.东濮凹陷煤成气地化指标及其与油成气的对比[J].石油与天然气地质,1985,(7). [3] 许化政.文留盐背斜形成与油气富集[J].石油与天然气地质,1988,l9,(7). [4] 王捷,关德范.油气生成运移聚集模型研究[M].北京:石油工业出版社,1999. [5] 中原石油勘探局.东濮凹陷油气生成地球化学研究[M].北京:石油工业出版社,1991. [6] 谯汉生,等.中国东部深层石油地质[M].北京:石油工业出版社,2002.
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