顺北油田分支断裂及断控储层的识别与描述研究  

Identification and Description of Branch Fracture and Fault-controlled Reservoirs in Shunbei Oilfield

作　　者：王鹏[1] 龚伟[1] 吴金才 聂可可 Wang Peng;Gong Wei;Wu Jincai;Nie Keke(Research Institute of Exploration and Development,Northwest Oilfield Company of Sinopec,Urumqi Xinjiang 830011,China;Goilgas(Beijing)Energy Technology Co.,Ltd,Beijing 102200,China)

机构地区：[1]中国石化西北油田分公司勘探开发研究院,新疆乌鲁木齐830011 [2]吉奥科思(北京)能源科技有限公司,北京102200

出　　处：《工程地球物理学报》2024年第4期663-671,共9页Chinese Journal of Engineering Geophysics

基　　金：中石化西北油田分公司勘探开发研究院科研项目(编号:KY2020-S-137)。

摘　　要：顺北油气田是断裂控制的断控油气田,其中不少断层发育有分支断裂。分支断裂在常规地震资料上难以发现,属于断距小或者说是比较隐蔽的断裂。因这些断裂带形态与分布不清,断控储集体特征也不清楚,从而使得储层预测与目标优选困难。如何对这类断裂开展识别和描述,进而开展储层预测和目标评价,本次研究尝试从多种方法的组合使用入手,通过反复试验发现,把时频谱蓝化提高地震分辨率处理与方向性边界保持断层增强处理组合使用,能有效提高地震资料分支断裂的识别能力;把梯度结构张量断裂检测处理与最大似然属性断裂检测处理组合使用能很好地对分支断裂进行描述与刻画;把结构张量属性分析与缝洞增强处理组合使用能很好地对洞穴型储层进行有效刻画;GST(Gradient Structural Tensor)相干属性与不连续性属性联合使用实现了对孔洞型储层的预测;体曲率+最大似然属性组合使用实现了对裂缝型储层预测与描述;在不同类型储层预测基础上,通过不同类型储层的叠合得到的总储层预测。Shunbei oil and gas field is a fault-controlled oil and gas field where many branch faults are difficult to be detected in conventional seismic data at small fracture distance or relatively hidden fracture.The unclear morphology and distribution of these fault zones and the unclear characteristics of the broken control collective make it difficult to predict the reservoir and target selection.To identify and describe this kind of fracture,this study starts with the combinatorial use of multiple methods,and then carry out reservoir prediction and target evaluation,Through repeated tests,the paper finds that the combination of seismic resolution processing and fault enhancement processing can effectively improve the identification ability of seismic data branch faults;The combination of gradient structure tensor fracture detection treatment and maximum likelihood attribute fracture detection treatment can describe and depict the branch faults very well;The combination of structural tensor attribute analysis and seam hole enhancement treatment can depict the cave reservoir effectively;The joint use of GST coherent attribute and discontinuity attribute enables the prediction of hole reservoir;The combination of body curvature and maximum likelihood attribute realizes the prediction and description of the fracture reservoir.A set of technical methods are explored for the identification and description of branch fracture and control reservoirs in Shunbei oilfield.

关 键 词：分支断裂 提高分辨率处理 断层增强处理 断裂检测 断控储集体预测 

分 类 号：P631.4[天文地球—地质矿产勘探]