箕状断陷缓坡带油气富集的主要地质因素  

Main geological factors of controlling accumulation and distribution of oil and gas in gentle slope of half graben basin

作　　者：金凤鸣 李宝刚[2] 崔周旗 董雄英 王海潮 侯凤香 

机构地区：[1]中国石油华北油田分公司,河北任丘062550 [2]中国石油大学(华东)地球资源与信息学院,山东东营257061

出　　处：《断块油气田》2011年第6期726-729,共4页Fault-Block Oil & Gas Field

基　　金：中石油重大科研攻关项目"冀中坳陷油气勘探新领域地质特征研究"(2008B-0303)资助

摘　　要：箕状断陷缓坡带勘探面积大,长期继承性发育,紧邻洼陷带生油中心,具有优越的成藏条件。缓坡带油气的富集取决于多个地质因素:缓坡带烃源岩的分布增加了高倾角缓坡带油气的丰度,直接决定着低倾角缓坡带油气的分布;地层倾角控制缓坡带油气横向运移距离和油气分布范围;鼻状构造带是缓坡带油气区域运移的指向;缓坡带内侧同生断层的断距控制油气富集的层位,断距大,油气富集层位多;缓坡带反向断层侧向封堵性强,靠近凸起规模较大的反向断层控制着油气分布,构成了缓坡带油气的成藏边界。Gentle slope in half graben basin presents the favorable conditions of oil and gas accumulation, such as great area, longterm inherited development, and close to oil generation center. Oil and gas accumulation in gentle slope is affected by several geological factors, namely oil source rock in gentle slope enriches the oil and gas abundance in high clip slope and controls the distribution of oil and gas in low dip slope; the dip of the strata in gentle slope controls the lateral migration distance and the scope of oil and gas distribution; nose-shape structural zone is the target of oil and gas migration in gentle slope; the greater the displacement of the growth fault is, the more oil and gas layers are in gentle slope; the adverse faults, especially the one close to the uplift, showed a strong lateral sealing ability, controlling the distribution of oil and gas and forming the boundary of oil and gas accumulation in gentle slope.

关 键 词：缓坡带 油气富集 地质因素 箕状断陷 

分 类 号：TE122.3[石油与天然气工程—油气勘探]