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异常高压对烃源岩成烃机理和油气运聚成藏的影响
石油实验地质
2005年 27卷 第2期
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Title
EFFECTS OF ABNORMAL HIGH-PRESSURE ON THE HYDROCARBON-FORMING MECHANISM OF SOURCE ROCKS AND THE MIGRATION AND ACCUMULATION OF OIL AND GAS
单位
石油大学, 山东, 东营, 257061
2. 中国石化, 胜利石油有限公司, 地质科学研究院, 山东, 东营, 257015
Organization
Petroleum University, Dongying, Shandong 257061, China
2. Research Institute of Geological Sciences, Shengli Oilfield, SINOPEC, Dongying, Shandong 257015, China
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。
Abstract
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 Es4; by contraries, it restrained the hydrocarbon generation of sulphur-poor source rocks in the middle and lower sub-members of Es3. 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;
Keywords:
abnormal high-pressure;
hydrocarbon-forming mechanism;
migration and accumulation;
subtle transportation system;
the Jiyang Depression;
基金项目
中国石油化工股份有限公司科研项目(P00018)
DOI
https://doi.org/10.11781/sysydz200502169
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