摘要
针对浊积岩油藏成藏规律复杂、含油性差异大的问题,以东营凹陷洼陷带东部沙三中亚段浊积岩为例,在文献调研的基础上,基于地震、测井、钻井、试油等多项资料,采用成藏基本地质要素及油气现今分布规律研究与典型油藏解剖相结合的方法,分析了研究区浊积岩成藏的主控因素。结果表明,研究区沙三中亚段浊积岩的成藏主要受控于以下3个方面:①有效储层的发育基本控制了油层的展布规律,储层的厚度中心往往也是油层的分布区或富集区;②在有效储层的分布约束前提下构造背景及异常高压控制了油气的富集;③有效的断层输导条件是研究区浊积岩能否成藏的关键,与相对独立的透镜状浊积砂体相比,由断裂体系沟通下部烃源岩的浊积岩砂体更容易成藏。在明确研究区成藏主控因素的基础上,总结了针对洼陷带浊积岩油藏的综合评价方法。
Turbidite reservoir is characterized by complex hydrocarbon accumulation rule and diverse oiliness.Based on the data of seismic,well logging,well drilling and well testing.The fundamental geologic features,combined with the hydrocarbon distribution rule and typical reservoir analysis were applied to study the main controlling factors of the accumulation of turbidite.The result shows that the hydrocarbon accumulation of turbidite in the middle sub-member of Es3 is controlled by the following three aspects：①The development of effective reservoir basically controlled the oil layer distribution,and the reservoir with great thickness is the distributed area and enrichment area of oil layer;②Oil and gas enrichment is controlled by structural setting and abnormal high pressure;③Effective transporting condition of faults is the key for hydrocarbon accumulation of turbidite.Compared with separate lenticular turbidite sand body,turbidite sandstone which is communicated with source rock by fault is easily charged by oil.Finally,a comprehensive evaluation method for the turbidite in sub-depression belt is concluded.
出处
《岩性油气藏》
CSCD
2012年第3期61-65,73,共6页
Lithologic Reservoirs
基金
国家科技重大专项"渤海湾盆地东营凹陷勘探成熟区精细评价示范工程"(编号:2008ZX05051)部分研究成果
关键词
成藏条件
主控因素
浊积岩
沙三中亚段
东营凹陷
hydrocarbon accumulation； main controlling factors； turbidite； the middle sub-member of the third member of Shahejie Formation； Dongying Sag
