TTI各向异性建模技术在泌阳凹陷中南部地区的应用  

Application of TTI anisotropic modeling technology in the central-southern area of Biyang Sag

作　　者：胡小波[1] 张高成[1] 陈从希[1] 杨兴圣[1] 王雷[1] 李俨[1] 石榴 HU Xiaobo;ZHANG Gaocheng;CHEN Congxi;YANG Xingsheng;WANG Lei;LI Yan;SHI Liu(Henan Oilfield Company,SINOPEC,Nanyang 473000,Henan,China;Sinopec Shanghai Engineering Co.,Ltd.,Shanghai,China,200127)

机构地区：[1]中国石化河南油田分公司勘探开发研究院,河南南阳473000 [2]中石化上海工程有限公司,上海200127

出　　处：《石油地质与工程》2025年第2期65-72,共8页Petroleum Geology and Engineering

摘　　要：泌阳凹陷中南部地区油气资源丰富、油气藏类型多样,具有较大勘探潜力,该地区以往开展了大量各向同性深度偏移技术攻关,仍然存在成像与实钻井误差较大,各向异性问题显著,难以满足进一步精细勘探需求;为解决各向异性问题,开展了TTI各向异性建模技术应用研究。采用测井约束速度建模技术提高了白云岩速度异常区速度模型精度,采用浅中深一体化融合速度建模技术提高了陡坡带“双复杂区”速度模型精度;采用从VTI到TTI递进式的各向异性速度参数建模技术,使得井震误差减小,各向异性问题得到较好解决。同时,采用构造属性约束代替常规层位属性约束,使得复杂构造速度模型与地下构造特征更加吻合,优化了井震误差分析环节,提高TTI建模效率。最终应用成果表明,泌阳凹陷中南部地区复杂构造得到准确刻画,为油气勘探开发提供了高品质基础资料。The central-southern area of Biyang Sag are rich in oil and gas resources,with multiple reservoirs types and great exploration potential.In response to seismic imaging in this area,a large number of technical research efforts on isotropic depth migration have been carried out.However,there still exists a relatively large error between the imaging results and the actual drilled wells,and the anisotropy problem makes it difficult to meet the requirements of further fine exploration.To solve the anisotropy problem,an application study of TTI anisotropic modeling technology has been carried out.The logging-constrained velocity modeling method is adopted to improve the accuracy of the velocity model in the dolomite velocity abnormal zone,and the integrated shallow-middle-deep fusion velocity modeling technology is used to improve the accuracy in the"double complex area"of the steep slope zone.The progressive anisotropic velocity parameter modeling technology from VTI to TTI is adopted,which reduces the well-seismic error and better solves the anisotropy problem.At the same time,the structural attribute constraint is used to replace the conventional horizon attribute constraint,making the complex structural velocity model more consistent with the underground structural features,optimizing the well-seismic error analysis link and improving the efficiency of TTI modeling.The final application results show that the complex structures in the central-southern area are accurately characterized,providing high-quality basic data for oil and gas exploration and development.

关 键 词：泌阳凹陷 速度异常区 双复杂区 各向异性建模 

分 类 号：P631[天文地球—地质矿产勘探]