断裂密集带及附近下生上储式油气富集的控制因素  

Controlling factors of hydrocarbon enrichment with the type of“below source and upper reservoir”in fault concentrated zones and nearby

作　　者：付广[1] 王宇鹏 FU Guang;WANG Yupeng(School of Earth Sciences,Northeast Petroleum University,Daqing 163318,Heilongjiang,China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318

出　　处：《岩性油气藏》2018年第2期23-29,共7页Lithologic Reservoirs

基　　金：国家自然科学基金项目"油源断裂转换带优势输导油气条件研究"(编号:41372153)资助

摘　　要：为研究断裂密集带及附近下生上储式油气分布规律,在断裂密集带内部结构类型及成因分析的基础上,利用断裂密集带及附近油气分布与成藏条件之间的关系,对断裂密集带及附近下生上储式油气富集的控制因素进行了研究。结果表明,断裂密集带及附近下生上储式油气富集主要受3个因素的控制:(1)断裂密集带边界断裂是否为油源断裂控制着断裂密集带及附近油气是否聚集,如果边界为油源断裂,断裂密集带及附近油气聚集,否则无油气聚集;(2)断裂密集带内部结构类型控制着油气在断裂密集带及附近的富集程度,背形断裂密集带及附近油气聚集,而单斜形和向形断裂密集带及其附近油气较少;(3)边界断裂与盖层之间的配置关系控制着油气在断裂密集带及附近的聚集层位,盖层封闭区内,油气在断裂密集带及附近盖层之下聚集,反之则在其盖层上下聚集。因此,断裂密集带及附近下生上储式油气勘探应着重考虑以上3个主要因素。In order to study the oil and gas distribution law of the type of“below source and upper reservoir”in fault concentrated zones and nearby,based on the analysis of internal structure types and its genesis of the fault concentrated zones,through the study of the relationship between the reservoir forming conditions and hydrocarbon distribution in the fault concentrated zones and nearby,the controlling factors of hydrocarbon enrichment with the type of“below source and upper reservoir”in fault concentrated zones and nearby were studied.The results show that there are mainly three controlling factors of hydrocarbon enrichment:(1)Whether the boundary fault in the fault concentrated zones is the source fracture that controls the hydrocarbon accumulation,only the boundary fault in the fault concentrated zones is the source fracture can make the underlying source rocks generate and accumulate oil and gas in the fault concentrated zones and nearby target layer.(2)Hydrocarbon enrichment degree is controlled by the type of fault concentrated zones,and hydrocarbons are enriched in the back fault concentrated zones and nearby,but relatively few in the monoclinic and synform fault concentrated zones and nearby.(3)The relationship between the boundary fault and caprock controls the hydrocarbon accumulation layer,in the caprock enclosed area,hydrocarbons accumulate under the caprock,otherwise,accumulate up and down the caprock.Therefore,the above three main factors should be taken into consideration in the oil and gas exploration of the type of“below source and upper reservoir”in fault concentrated zones and nearby.

关 键 词：断裂密集带 下生上储式 油气富集 主控因素 

分 类 号：TE122[石油与天然气工程—油气勘探]