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%。
Wenliu structure is an anticline caused by salt-gathering on the background of center mole track, it was formed from Es^(3(2)) to Es^2. 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 Es^(4(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 Es^(4(1-2)) and Es^(4(7-8)), the final water-displacement rate is 40%.
出处
《石油实验地质》
CAS
CSCD
2003年第6期712-720,共9页
Petroleum Geology & Experiment
基金
中国石化科技项目(P0002).
关键词
盐滑塌
二次生气
初次运移
驱水效率
文留构造
渤海湾盆地
salt-slumping
secondary hydrocarbon generating
first migration
water-displacement rate
Wenliu structure
Bohaiwan Basin
