基于导航金字塔的强地震约束建模方法——以胜利油田沙二段河流相为例  

Strong seismic constraint modeling based on steerable pyramid:A case study of fluvial facies in Sha-2 member in Shengli Oilfield

作　　者：张海峰 黄旭日[1,2,3] 张俊 任梦宇[1,2] ZHANG Haifeng;HUANG Xuri;ZHANG Jun;REN Mengyu(School of Geoscience and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China;State Key Laboratory of Reservoir Geology and Exploitation,Chengdu,Sichuan 610500,China;Natural Gas Geology Key Laboratory of Sichuan Province,Chengdu,Sichuan 610500,China;Shengli Oilfield Production Plant of SINOPEC Shengli Oilfield Company,Dongying,Shandong 257051,China)

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500 [2]油气藏地质及开发工程国家重点实验室,四川成都610500 [3]天然气地质四川省重点实验室,四川成都610500 [4]中国石化胜利油田分公司胜利采油厂,山东东营257051

出　　处：《石油地球物理勘探》2024年第6期1197-1205,共9页Oil Geophysical Prospecting

基　　金：国家自然科学基金联合基金项目“莺琼盆地中深层异常温压地震岩石物理理论及综合智能储层预测方法研究”(U20B2016);国家自然科学基金项目“羌塘盆地格架及沉积结构地球物理成像理论与识别技术研究”(42241206)联合资助。

摘　　要：河流相储层横向变化快、非均质性强,传统建模方法已不能满足目前储层表征的需求。为此,首先利用导航金字塔技术,将地震数据进行分解与重构,重构后的数据更加凸显地质规律,有利于沉积相的刻画;然后采用贝叶斯—序贯高斯地震约束建模方法进行储层建模,建立测井数据与地震属性的约束关系,提高模型垂向分辨率。胜利油田沙二段河流相储层建模实践表明,经导航金字塔技术处理后的地震数据横向表征能力增强,砂体边界识别效果较好;与传统序贯高斯方法相比,贝叶斯—序贯高斯方法模拟模型垂向分辨率更高,砂体预测厚度与实际厚度吻合率达86%,更有利于砂体识别。该方法可为剩余油开采提供指导。Rendering traditional modeling methods are inadequate for fluvial reservoir characterization due to the reservoir’s rapid lateral variations and strong heterogeneity.To address this,we initially employ steerable pyramid technology to decompose and reconstruct seismic data,enhancing the geological laws crucial for sedimentary facies characterization.Subsequently,we apply Bayesian-sequential Gaussian seismic-constraint modeling to the reservoir,establishing constraints between logging data and seismic attributes to enhance the model’s vertical resolution.Modeling practices in the fluvial reservoir of the Sha-2 member in Shengli Oilfield demonstrate that,after the steerable pyramid process,seismic data,lateral characterization improves,with effective sand body boundary identification.Compared to traditional Sequential Gaussian methods,the Bayesian-sequential Gaussian approach achieves higher vertical resolution,with an 86%match between sand body thickness and the actual value,making it more effective for sand body identification.This method provides guidance for remai-ning oil recovery.

关 键 词：河流相储层 导航金字塔 贝叶斯—序贯高斯 储层建模 地震约束 

分 类 号：P631[天文地球—地质矿产勘探]