黄骅坳陷中北区多元复合成因浅层气藏与序列  

Shallow gas reservoirs and sequences with multiple and composite origins in the middle and northern areas of Huanghua depression

作　　者：张凡磊[1] 周宗良[1] 肖建玲[1] 李秋媛 

机构地区：[1]中国石油大港油田公司勘探开发研究院

出　　处：《录井工程》2017年第4期110-114,共5页Mud Logging Engineering

摘　　要：黄骅坳陷中北区新近系馆陶组、明化镇组浅层气丰富。为提高浅层气的开发程度,进行了成藏因素和多元复合成因类型分析,浅层气浅层气分布主要受断层及曲流河砂体展布形态等控制,单一气藏的规模受河道砂体岩性边界的影响很大。气藏可分4种类型:"Y"字形断层控制型气藏、反向断块型气藏、断层-岩性控制型气藏、砂岩透镜体型气藏。浅层气源主要为油溶释放气和原油降解气,其形成机理主要表现在深部"端源"古近系生成油气沿大断层向上运移,二次油气分布主要是以游离气或油溶气、水溶气形式向上运移形成的古近系东营组及新近系馆陶组、明化镇组油藏;这些浅层油藏经原油稠化后的油气分离、天然气渗滤扩散,在新近系明化镇组、馆陶组浅层气成藏即第三次油气再分布。根据对浅层气成因及成藏序列的分析,在选择浅层有利目标时,可以优先考虑下部油气富集、断层发育的构造高部位,这些部位一般也是浅层气藏相对发育、储量分布相对集中的有利部位。The Neogene Guantao formation and Minghuazheng formation in the middle-northern part of Huanghua depression are rich in shallow gas. In order to improve the development of shallow gas,the hydrocarbon accumulation factors and the types of multiple and composite origins were analyzed. Shallow gas distribution is mainly controlled by faults and the through-going form of meandering sand body. Four types of gas reservoirs can be divided:Y-shaped fault controlled gas reservoir,reverse fault-block gas reservoir,fault lithology controlled gas reservoir and sand body lens gas reservoir. The shallow gas sources are mainly oil-soluble liberated gas and crude oil degradation gas. The formation mechanism of shallow gas mainly occurs in the deep end source Paleogene oil and gas migrated upwards along the large fault. The secondary distribution of oil and gas is mainly the reservoirs of the Paleogene Dongying formation and the Neogene Guantao formation and Minghuazhen formation,which are formed by upward migration of free gas,oil soluble gas and water-soluble gas. The gas/oil separation formed by crude oil thickening these shallow oil reservoirs,after the infiltration and diffusion of natural gas,shallow gas reseroirs were formed in the Neogene Minghuazhen formation and Guantao formation,that is the third redistribution of oil and gas. According to the analysis of the origin and the sequence of shallow gas accumulation,when selecting the favorable target of shallow layer,it is possible to give priority to the accumulation of oil and gas in the lower part and the high part of the fault development. In general,these are also favorable places of the relative development of shallow gas reservoir and the relative concentration of reservoir distribution.

关 键 词：黄骅坳陷 浅层气藏 多元复合 成藏序列 

分 类 号：TE132.1[石油与天然气工程—油气勘探]