辽河滩海东部地区断裂活动与油气成藏关系初探  

Discussion of the relationship between fault activities and hydrocarbon accumulation in eastern Liaohe offshore area

作　　者：杜庆国[1] 

机构地区：[1]中国石油辽河油田分公司勘探开发研究院,辽宁盘锦124010

出　　处：《石油地质与工程》2018年第3期13-16,20,共5页Petroleum Geology and Engineering

基　　金："渤海湾盆地精细勘探关键技术"下属课题<渤海湾盆地北部油气富集规律与增储领域研究>下属专题<辽河坳陷增储领域地质评价与勘探实践>(2016ZX05006–005)

摘　　要：对辽河滩海东部地区葵花岛构造带断裂特征及断层活动速率进行研究,分析断裂活动与油气成藏关系,结果表明:(1)龙王庙构造的断层活动性比葵花岛主体断层强;(2)断至沙一段或沙三段的断层为相对有利的油源断裂;(3)当东二段、东三段断层断接厚度绝对值小于100 m时,探井获得油气层概率较大;(4)当馆陶组断层活动速率小于2.5 m/Ma时,与其断层相关圈闭的含油气性都较好;东二期断层活动速率小于35 m/Ma时,明显有利于油气汇聚保存,东三期断层活动速率小于66 m/Ma时,有利于东三段及以下地层油气汇聚保存。综合评价认为太葵构造主体两条有利断层控制的圈闭是潜在的有利目标。Through the research on fracture characteristics and fault activities rate of Kuihuadao in eastern Liaohe offshore area, the relationship between fault activities and hydrocarbon accumulation was analyzed. The results indicated:(1)The fault activity of Longwangmiao structure is stronger than that of Kuihuadao.(2)The faults in the first member or third member of Shahejie formation are of relatively favorable oil source fractures.(3)When the absolute value of the faulted thickness is less than 100 m, the probability of obtaining hydrocarbon reservoirs is higher.(4)When the fault activities rate of Guantao formation is less than 2.5 m/Ma, the oil–bearing properties of the traps are better; when the rate in Dong–2 period is less than 35 m/Ma, it is obviously favorable for hydrocarbon accumulation preservation; when the rate in Dong–3 period is less than 66 m/Ma, it is favorable for hydrocarbon accumulation preservation in Dong–3 member and below. The comprehensive evaluation believes that the trap controlled by two favorable faults in Taikui structure is the potential favorable target.

关 键 词：辽河滩海东部地区 断裂特征 断层活动速率 油气成藏 

分 类 号：TE111.2[石油与天然气工程—油气勘探]