井—震结合曲流型储层构型研究及应用——以大庆长垣西部斜坡区为例  

Meandering reservoir architecture based on well-seismic analysis and its application:Taking the western slope area of Daqing Oilfield as an example

作　　者：杨春生 焦艳丽[2] 蔡东梅[2] 杨莹彬[2] 边婧 YANG Chunsheng;JIAOYanli;CAI Dongmei;YANG Yingbin;BIAN Jing(School of Earth Sciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Research Institute of Exploration and Development of Daqing Oilfield Company Ltd.,Daqing,Heilongjiang 163712,China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318 [2]大庆油田勘探开发研究院,黑龙江大庆163712

出　　处：《石油地球物理勘探》2024年第6期1330-1339,共10页Oil Geophysical Prospecting

基　　金：中国石油天然气股份公司重大科技专项“中高渗油田特高含水期大幅度提高采收率技术研究”(2023ZZ22)资助。

摘　　要：大庆油田西部斜坡区萨尔图油层萨Ⅰ组储层以曲流型河道砂体沉积为主,由于点坝砂体边界及其内部废弃河道识别精度低,制约着开发水平井的部署。为此,在高密度地震资料基础上,采用基于动态Q补偿的偏移处理技术,大幅提高了河道砂体的成像精度,明确了地震剖面上曲流型河道砂体点坝及其内部废弃河道的波组特征;平面上为进一步突出曲流型河道砂体内部非均质特征,利用楔状地震正演模型,建立了不同频率地震数据体可识别的极限砂体厚度,根据研究区砂体厚度分布值域,优选基于S变换的3个单频体采用RGB三色融合技术,实现了不同厚度级别砂体精准预测;同时,建立了点坝砂体边界及其内部废弃河道的岩心相-测井相-地震相的响应模式,明确了点坝及废弃河道的含油性。研究结果表明:基于动态Q补偿的偏移处理技术,提高了河道砂体在地震剖面上的识别精度;基于S变换的分频体RGB属性融合技术,能够在平面上精准预测废弃河道、点坝边界及其内部非均质性;建立的岩心相—测井相—地震相的响应模式,能够准确预测不同类型砂体的含油性。应用研究成果指导部署井位304口,其中188口直井钻井成功率98.0%,116口水平井平均实钻水平段长度387.8 m,平均含油砂岩钻遇率93.4%。The SAⅠFormation of the Saertu oil layer in the western slope area of Daqing Oilfield is mainly com-posed of meandering channel sand deposits.The low accuracy of identifying the boundary of the point bar sand bodies and the internal abandoned channels restricts the development plan of horizontal wells.Therefore,based on high-density seismic data,we adopt the migration processing technology based on dynamic Q compensation to significantly improve the imaging accuracy of the channel sand bodies,clarifying the wave group characteristics of sand body point bars on meandering channels and the internal abandoned channels on seismic sections.To further highlight the internal heterogeneity characteristics of meandering channel sand bodies on the plane,we utilize a wedge shaped seismic forward model to establish the maximum thickness of sand bodies that can be re-cognized by seismic data volumes at different frequencies.RGB three-color fusion technology is used on three Stransform-based single frequency bodies selected according to the value range of sandstone thickness distribution in the area to accurately predict the sand bodies with different thickness levels.At the same time,a response model of core facies-logging facies-seismic faciesis established for the boundary of the point bar sand bodies and the internal abandoned river channels,clarifying their oil-bearing properties.The research results show that the migration processing technology based on dynamic Q compensation has improved the recognition accuracy of channel sand bodies on seismic sections.The frequency divider RGB attribute fusion technology based on S-transform can accurately predict abandoned channels,point bar boundaries,and the heterogeneity therein on the plane.The established response model of core facies-logging facies-seismic facies can accurately predict the oil-bearing properties of different types of sand bodies.The application research results guide the deployment of 304 well locations.To be specific,the drilling success rate of 188 vertica

关 键 词：点坝 废弃河道 地震正演 RGB融合 非均质性 

分 类 号：P631[天文地球—地质矿产勘探]