塔河油田碳酸盐岩叠前裂缝预测技术应用分析  

The Application of Pre-stack Fracture Prediction Technique in Tahe Oilfield Carbonate Reservoirs

作　　者：王震[1] 邓光校 文欢 丁维 王鑫 

机构地区：[1]中国石油化工股份有限公司西北油田分公司,新疆乌鲁木齐830011 [2]中石化地球物理公司华北分公司2236地震队,河南南阳473000

出　　处：《工程地球物理学报》2018年第1期65-72,共8页Chinese Journal of Engineering Geophysics

基　　金：国家科技重大专项(编号:2016ZX05053)

摘　　要：塔河油田奥陶系碳酸盐岩断裂—裂缝主要发育于加里东—海西期,经历多期应力改造,以高角度构造缝为主。利用纵波各向异性预测裂缝的分布特征,其方位特征与成像测井成果匹配度高。叠前与叠后预测结果差异较大,分析认为叠前各向异性对于单组高角度缝更敏感,而叠后属性对于较大规模的断裂破碎带更有效;由于受各向异性及成像方位的影响,分方位偏移成像效果差异较大,拟合叠后分方位数据发现差异主要分布于断裂、溶洞周边,与地质认识相符。The faults and fractures of the Ordovician carbonate in the Tahe oilfield are mainly developed in the Caledonian-Hercynian period,which is subjected to multi-period stress transformation and dominated by high-angle structural joints.The distribution characteristics of fractures are predicted by longitudinal wave anisotropy,and their azimuth characteristics are highly matched with imaging logs.The results show that prestack anisotropy is more sensitive to single-group high-angle slits,and post-stack properties are more effective for larger-scale fracture zones.There are big differences in the imagingeffect of azimuth shift,due to the influence of anisotropy and imaging orientations and these differences are found mainly around the fractures and caves by the fitting data,which is consistent with the geological understanding.

关 键 词：塔河油田 碳酸盐岩 叠前各向异性 全方位 高角度裂缝 

分 类 号：P631.4[天文地球—地质矿产勘探]