摘要： 断控缝洞型油气藏在塔里木盆地碳酸盐岩领域勘探开发中占有着重要的地位.针对不同断裂、同一断裂不同段油气开发效果差异明显、油气富集特征不清晰,影响了超深层高效开发效果的问题.以塔里木盆地富满油田一间房组—鹰山组为例,采用钻井数据、高品质三维地震数据和生产动态数据,开展超深走滑断裂对油气富集程度的控制作用研究.结果表明:①断裂带控制油气富集主要受断裂与烃源岩接触关系、优势运移通道及储集体规模三方面因素控制;②通过已钻井生产效果的对比分析,构建了通源性、断裂疏导、储集体储量规模与油气富集的定量关系,完善了一套超深断控油气藏差异化富集程度的评价计算方法;③深大断裂通源性是断控油气藏富集程度的重要影响因素,断裂与烃源岩接触关系好、运移通道上下连通性好、有效储集体规模大的油藏富集程度高.利用新方法对富满油田 19 号断裂油气富集程度进行评价,其结果与钻探成果符合率达 92%.基于断控缝洞体油藏断裂"三性"分析新认识,形成了一种断控缝洞型油气藏富集程度评价方法,并对塔里木盆地其他类似油田高效开发实践具有较好的借鉴意义.

关键词: 走滑断裂带, 构造样式, 油气垂向运移, 断裂疏导, 通源性, 油气富集

Abstract: The fault-controlled fracture-cavity type oil and gas reservoir plays an important role in the exploration and develop-ment of oil and gas in the carbonate rocks of the Tarim Basin.Research shows that there are significant differences in the oil and gas development effects in different fractures or different segments of the same fracture in the Fuman Oilfield,leading to unclear oil and gas accumulation characteristics and affecting the efficient development of ultra-deep layers.This paper takes the strata from the Yijianfang Group to the Yingshan Group in the Fuman Oilfield of the Tarim Basin as an example,using drilling data,high-quality 3D seismic data,and production dynamic data to study the control effect of ultra-deep strike-slip faults on the degree of oil and gas accumulation.The results show that:(1)The oil and gas accumulation in the fault zone is mainly controlled by three factors:the contact relationship between the fault and the source rock,the fault's role as a migration pathway,and the size of the reservoir.(2)By comparing and analyzing the drilling production results,the paper establishes a quantitative relationship between the connectivity of the source,the fault's guiding role,the scale of the reservoir,and oil and gas accumulation,improving a set of evaluation and calculation methods for the differentiated accumulation degree of ultra-deep fault-controlled oil and gas reservoirs.(3)The source connectivity of deep and large faults is an important factor affecting the accumulation degree of fault-controlled oil and gas reservoirs.The higher the oil and gas accumulation,the better the contact between the fault and the source rock,the better the vertical connectivity of the migration pathway,and the larger the effective reservoir scale. This paper proposes a new understanding of the"source connectivity"analysis of fractures in fault-controlled fracture-cav-ity reservoirs and develops an evaluation technique for ultra-deep carbonate"fault-controlled oil and gas reservoir formation".Using this method,the oil and gas accumulation degree of the FI 19 fault zone in the Fuman Oilfield was analyzed,with a match rate of 92%to the well data.This method has good reference value for the further development practice of other oilfields in the Tarim Basin.

Key words: strike-slip fault zone, structural style, vertical transport of oil and gas, fault-controlled fluid migration, source-con-nectivity, oil and gas enrichment

中图分类号: 

• TE132.1 P62