东营凹陷广利油田隐蔽油气藏油气富集条件研究  

Oil-gas Enrichment Conditions of the Subtle Reservoirs of Guangli Oilfield in Dongying Sag

作　　者：吴克峰[1] 

机构地区：[1]中石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《石油天然气学报》2013年第5期46-50,4,共5页Journal of Oil and Gas Technology

基　　金：国家科技重大专项(2008ZX05051)

摘　　要：随着我国东部油田勘探开发程度的不断深入,隐蔽油气藏成为开发后期油田的主要勘探对象,广利油田古近系沙河街组四段(Es4)是东营凹陷隐蔽油气藏的主要勘探对象。研究区生储盖组合优越,油源充足。通过油气运移系统分析,研究区油气运移主要包括断裂、砂体和微裂缝3种输导方式,断裂是研究区的主要输导方式,砂体和微裂缝次之。在"三元控藏"理论指导下对成藏因素逐一分析:研究区正向断层和反向断层都是有利的油源断层和遮挡层,反向断层最有利于油气的聚集和成藏,正向断层相对不利,但正向断层也具有一定的分隔能力;研究区砂体发育局限,且受构造活动形成的古地貌控制,储层展布决定了油藏分布范围;并且压力的分布决定了油藏的类型。With the deepening of oilfield exploration and development,the subtle reservoir was the major prospecting target of oilfield development at the late stage of its development,and the fourth member of Es 4 in Guangli Oilfield was the main object of the exploration of subtle reservoirs in Dongying Sag.The assemblage of oil genesis,reservoir and cap-rock was dominated in the work area with sufficient sources.By analyzing the oil-gas migration system,it was indicated that the migration in the studied area included 3 types,such as faults,sand bodies and micro-cracks,the faults were the main migration style,sand bodies and micro-cracks were the next.The gas/oil migration of the work area is analyzed in order based on 3 element reservoir control theory,forward and reverse faults in the studied area are beneficial oil source faults and barrier beds,the reverse faults are more beneficial hydrocarbon accumulation and migration,the forward faults are relatively non-beneficial,but it has certain isolation ability.The sand development is limited,and is controlled by the palaeogeomorphology formed by tectonic activity,so the reservoir distribution determines reservoir distributive range,and the distribution of the formation pressure determines the reservoir types.

关 键 词：广利油田 油气富集 生储盖 油气运移 成藏因素 

分 类 号：P618.13[天文地球—矿床学]