顺北中部超深层断控缝洞型油气藏储集体特征与实践应用  

Characteristics and practical application of ultra-deep fault-controlled fracturedcavity type reservoir in central Shunbei area

作　　者：张煜[1] 毛庆言[1] 李海英[1] 李宗杰[1] 韩俊[1] 林波[1] Zhang Yu;Mao Qingyan;Li Haiying;Li Zongjie;Han Jun;Lin Bo(Sinopec Northwest Oilfield Company)

机构地区：[1]中国石化西北油田分公司,830011

出　　处：《中国石油勘探》2023年第1期1-13,共13页China Petroleum Exploration

基　　金：国家自然科学基金企业创新发展联合基金项目“克拉通盆地内部走滑断裂体系成因及控藏机制研究——以塔里木盆地为例”(U21B2063)。

摘　　要：超深层碳酸盐岩储层非均质性强,其内部结构受地震资料精度限制,规模储层预测和分布认识存在难度。选取顺北中部北东向断裂体系的顺北4号断裂带为研究对象,开展断裂构造破碎成储物理模拟实验、井震精细标定、模型正演、储集体表征、储集体地质模型研究,提出断裂面附近发育多个由空腔、裂缝带组成的多组缝洞集合体,建立了走滑断裂栅状储集体结构模式,阐明走滑断裂栅状储集体的成因机制与主控因素,构建了断裂带规模储集体“一体多栅”结构模型,形成了断控储集体空间定位与“一井多控、一井一靶、一井多靶”分类井轨迹设计方案。成果应用指导了顺北4号、顺北8号断裂带钻井轨迹设计,实现了断控缝洞型复杂油气藏的“少井高产”,新增一个百万吨产能新阵地,对我国其他盆地超深层断控型油气藏的勘探具有一定指导与借鉴意义。The ultra-deep carbonate reservoir is characterized by strong spatial heterogeneity,and the interpretation of the internal reservoir structure is limited by the accuracy of seismic data,leading to the difficulty in predicting the distribution of large-scale reservoirs.By taking Shunbei No.4 fault zone of the NE-trending fault system in the central part of Shunbei area as the study object,physical simulation experiment of reservoir formation by the fractured fault structure,fine calibration of well-seismic data,forward modeling,reservoir characterization and reservoir geological modeling are conducted.The study results show that multiple groups of fractured-cavity aggregates composed of cavities and fracture zones were developed near the fault plane.As a result,a structural model of grid reservoir in strike-slip fault is proposed,and the genetic mechanism and main controlling factors of grid reservoir in strike-slip fault are identified.An“integrated multi-grid”structure model of large-scale reservoir in fault zone is constructed,and the technology of spatial positioning of fault-controlled reservoir and the classified well trajectory design of“one well with multi-control,one well with one target and one well with multiple targets”is developed.The application of the study results has guided the well trajectory design in Shunbei No.4 and No.8 fault zones,realized the goal of“high output by drilling few wells”of complex fault-controlled fractured-cavity oil and gas reservoirs,and supported to add a new position with capacity of one million tons,which have certain guidance and reference significance for the exploration of ultra-deep fault-controlled reservoirs in other basins in China.

关 键 词：顺北 碳酸盐岩 走滑断裂带 断控缝洞储集体 栅状结构 井轨迹设计 

分 类 号：TE112.23[石油与天然气工程—油气勘探]