摘要
珠江口盆地A油田作为南海东部典型的中型礁灰岩油田,在前期研究过程中面临着诸多困难与挑战。一是低渗礁灰岩油田储层非均质性强,井间对比困难,孔渗关系复杂,二是岩性边界及低渗灰岩储层“甜点”分布复杂,对开发方案的制定实施产生较大影响。面对两大难题,针对性地在低渗灰岩储层“甜点”敏感因子构建、叠前地震资料优化处理及高分辨率储层反演预测等方面采用了创新性技术手段和方法;通过SVR(Support Vactor Regression)支持向量机模拟技术精细预测横波曲线,并基于坐标转换的体融合技术创建“甜点”综合敏感因子,创新运用井控提高分辩率的道集优化处理技术开展低渗储层“甜点”预测研究,明显改善了反演结果的多解性并取得良好效果,为油田开发方案设计、井网优化和油藏生产提供了有力保障;同时,系列技术创新应用与成功经验对今后其他类似在建设油气田的前期研究具有指导和借鉴意义,助推南海东部油田增储上产。
Oilfield A in the Pearl River Mouth Basin,as a typical medium-sized reef limestone oilfield in the eastern part of the South China Sea,faces many difficulties and challenges in the preliminary research process.Firstly,the strong reservoir heterogeneity and the complex interhole permeability relationship makes the comparison between wells difficult.Secondly,the complex lithologic boundary and the“sweet spot”distribution renders a great influence on the formulation and implementation of the development plan.In the face of these problems,innovative technical methods and solutions are proposed to construct“sweet spot”sensitive factor in low-permeability limestone reservoirs,to optimize pre-Stack seismic data processing,and to predict high-resolution reservoir inversion.For the reef limestone oil field,SVR support vector machine simulation technology is used to predict the transverse wave curve,and the coordinate transformation parameter fusion technology is used to create the“sweet spot”comprehensive sensitive factor,and well control CRP(common reflection point)gather optimal processing technology is innovatively used to carry out the low-permeability reservoir“sweet spot”prediction research,which obviously reduces the multi-solution of the inversion results and provides a strong guarantee for oil field development design,well network optimization and reservoir production.At the same time,a series of technological innovations and successful experiences have positive guidance and reference significance for the preliminary studies of other similar oilfields under construction in the future,and ensuring increased production of the oil fields in the eastern part of the South China Sea.
作者
董政
李黎
徐超
赵伟超
刘南
Dong Zheng;Li Li;Xu Chao;Zhao Weichao;Liu Nan(Shenzhen Branch of CNOOC Ltd,Shenzhen Guangdong 518000,China)
出处
《工程地球物理学报》
2022年第6期819-828,共10页
Chinese Journal of Engineering Geophysics
基金
中海石油(中国)有限公司项目(编号:YXKY-2019-ZY-05)。
关键词
低渗灰岩储层
横波预测
甜点敏感因子
井控道集优化
甜点预测
low permeability limestone reservoir
transverse wave prediction
sweet spot sensitivity factor
well control gather optimization
sweet spot prediction
