叠前地质统计学反演在松辽盆地徐家围子断陷X区块火山岩储层预测中的应用  

Application of prestack geostatistical inversion in volcanic reservoir prediction of Block X in Xujiaweizi Rift in Songliao Basin

作　　者：向阳臣 XIANG Yangchen(Gas Production Company of PetroChina Daqing Oilfield Co Ltd,Daqing 163458,China)

机构地区：[1]中国石油大庆油田有限责任公司采气分公司,黑龙江大庆163458

出　　处：《大庆石油地质与开发》2022年第1期141-147,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气股份有限公司重大科技专项“松北深层天然气富集规律、勘探技术研究与规模增储”(2016E-0203)。

摘　　要：针对松辽盆地徐家围子断陷火山岩储层和有效储层预测难题,以徐家围子断陷X区块为例,开展火山岩储层预测方法研究与应用。通过岩石物理分析,综合对比多种弹性参数,明确了密度是火山岩储层的敏感岩石物理参数,能有效区分储层与非储层;岩性阻抗对储层含气性最敏感,可以利用岩性阻抗预测储层含气性;研究地震道集叠加方案以及建立精细初始模型,明确了5个角度叠加反演分辨率高于3个角度叠加反演;验证了应用地震均方根振幅属性作为地质约束条件,可提高初始地质模型精度;通过优选地震道集叠加方案、构建精细初始模型,建立了高分辨率叠前地质统计学反演火山岩有利储层和有效储层综合预测方法,在X区块应用中取得良好的效果。研究成果可为其他盆地火山岩储层地震预测提供借鉴。In the light of the problems of volcanic reservoir and effective reservoir prediction in Xujiaweizi Rift of Songliao Basin,taking Block X as example,volcanic reservoir prediction method and its application are conducted.With the help of petrophysical analysis and comprehensive comparison of several elastic parameters,density is determined to be sensitive petrophysical parameter of volcanic reservoir,which can effectively distinguish reservoir from non-reservoir.Lithologic impedance is most sensitive to gas-bearing property and can be used to predict gasbearing property of reservoir.Seismic gather stacking program is studied and fine initial model is established,verifying inversion resolution of five-angle stacking is higher than that of three-angle stacking.It is verified that extracting seismic RMS amplitude attribute as the geological constraint can improve accuracy of initial geological model.By optimizing gather stack program and fine initial modeling,comprehensive prediction methods of predicting favorable and effective volcanic reservoirs are established by high-resolution prestack geostatistical inversion and applied in Block X,and better effects are achieved.The study achievements can provide reference for seismic prediction of volcanic reservoirs in other basins.

关 键 词：叠前地质统计学反演 火山岩储层预测 松辽盆地 徐家围子断陷 

分 类 号：P631[天文地球—地质矿产勘探]