异常高压对烃源岩成烃机理和油气运聚成藏的影响  

EFFECTS OF ABNORMAL HIGH-PRESSURE ON THE HYDROCARBON-FORMING MECHANISM OF SOURCE ROCKS AND THE MIGRATION AND ACCUMULATION OF OIL AND GAS

作　　者：卓勤功 

机构地区：[1]石油大学

出　　处：《石油实验地质》2005年第2期169-172,共4页Petroleum Geology & Experiment

基　　金：中国石油化工股份有限公司科研项目(P00018)

摘　　要：流体异常高压控制着烃源岩的成烃机理和油气运聚成藏。超压促进沙四上亚段富硫烃源岩的生烃,而对贫硫的沙三中下亚段烃源岩生烃起抑制作用。因而沙四上亚段烃源岩早生、早排、成熟度较低,生成的油气充注凹陷外围及上部圈闭;沙三中下亚段烃源岩晚生、晚排、成熟度较高,生成的油气充注凹陷内部及下部圈闭。流体异常高压还能形成油气运聚的通道。所以,隐蔽输导体系的预测是今后岩性油气藏勘探的关键。The abnormal high-pressure of fluid controls the hydrocarbon-forming mechanism of source rocks and the migration and accumulation of oil and gas. Overpressure promoted the hydrocarbon generation of sulphur-rich source rocks in the upper sub-member of Es^4; by contraries, it restrained the hydrocarbon generation of sulphur-poor source rocks in the middle and lower sub-members of Es^3. Thus, in the former situation, hydrocarbon generated and discharged early, its maturity was lower, and it filled the peripheral and top traps of sags; in the latter, hydrocarbon generated and discharged late, its maturity was higher, and it filled the inner and lower traps of sags. The abnormal hygh-pressure of fluid also formed passages for hydrocarbon migration and accumulation. For the future, the forecast of subtle transportation systems is the key of exploration for lithological reservoirs.

关 键 词：异常高压 成烃机理 运聚成藏 隐蔽输导体系 济阳坳陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]