纯纵波提取技术在大民屯凹陷砂砾岩体储层预测中的应用
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摘要
大民屯凹陷古近系沙河街组四段为扇三角洲沉积,具有近源混杂堆积,纵向厚度大,相带及岩性变化快,含油气井段长、差异大等特点;且研究区地震资料分辨率低,声波测井曲线不能直接反映储层特征,难以识别砂砾岩体的有利储层。纯纵波提取技术能够克服水平叠加的缺点,有效去除AVO(振幅随偏移距的变化)效应,获取高分辨率的地震资料。为此,应用纯纵波提取技术对原始地震资料进行处理,提高地震资料的分辨率,满足后续地震反演的需求;再利用拟声波重构技术进行地震反演,准确刻画出砂砾岩体的有利储层相带,可以有效指导勘探开发。
Es4 in Damintun Sag is a fan delta deposit with characteristics of near-source mixed sedimentary,large vertical thickness,rapid variation of facies,belt and lithology,long oil-bearing section and large difference.The resolution of seismic data is very low,and the well logging curves can not directly reflect the reservoir characteristics in the study area.With the conventional pure-wave seismic data,seismic inversion is very difficult to identify the favorable reservoir of sandy conglomerate body in this area.The method of pure compression wave extraction is applied to solve the above-mentioned problems,effectively remove the effect of AVO for obtaining the seismic data with high resolution.In quasi-acoustic wave reconstruction technology,the low frequency information of formation background velocity is considered,by which the formation information can be more truly reflected.Therefore by using the pure compression wave extraction technology for processing the original seismic data,the resolution of seismic data is improved,it can satisfy the needs of subsequent seismic inversion,the quasi-acoustic wave reconstruction technology is used again for seismic inversion for accurately depicting the favorable reservoir belts for effectively guiding exploration and production in oilfields.
Es4 in Damintun Sag is a fan delta deposit with characteristics of near-source mixed sedimentary,large vertical thickness,rapid variation of facies,belt and lithology,long oil-bearing section and large difference.The resolution of seismic data is very low,and the well logging curves can not directly reflect the reservoir characteristics in the study area.With the conventional pure-wave seismic data,seismic inversion is very difficult to identify the favorable reservoir of sandy conglomerate body in this area.The method of pure compression wave extraction is applied to solve the above-mentioned problems,effectively remove the effect of AVO for obtaining the seismic data with high resolution.In quasi-acoustic wave reconstruction technology,the low frequency information of formation background velocity is considered,by which the formation information can be more truly reflected.Therefore by using the pure compression wave extraction technology for processing the original seismic data,the resolution of seismic data is improved,it can satisfy the needs of subsequent seismic inversion,the quasi-acoustic wave reconstruction technology is used again for seismic inversion for accurately depicting the favorable reservoir belts for effectively guiding exploration and production in oilfields.
引文
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[2] 单俊峰,刘兴周,李理.古近系致密砂岩“优质储层”预测方法初探[J].特种油气藏,2012,19(5):11～14+151.
[3] 李晓光,高险峰,李玉金,等.辽河探区油气勘探潜力与前景[J].特种油气藏,2011,18(5):1～5.
[4] 鲍丹丹.单井评价在老区油气勘探中的应用[J].中外能源,2017,22(4):37～42.
[5] 李庆忠.用剔除拟合法求纵波正入射剖面一种取代水平叠加的处理技术[J].石油地球物理勘探,1995,30(2):147～167.
[6] 钟森才.Radon变换在提取地震反射信号和压制干扰的应用[A].勘探地球物理北京(89)国际讨论会论文摘要集[C].1989.
[7] 孙耀华,张宏,宋桂桥,等.剔除拟合法在ST盆地地震资料处理中的应用[J].物探化探计算技术,1999,21(3):231～237.
[8] 孙赞东,张远银,王招明,等.基于弹性反演的纯纵波数据刻画储层发育细节方法:中国,CN104007465A [P].2014-08-27.
[9] Liu L F,Zhou X Y,Sun Z D,et al.A new non-linear AVO inversion method and Its Application in the prediction of carbonate reservoirs[A].76th Conference and Exhibition,EAGE,Extended Abstracts[C].2014.
[10] Sun S Z,Chen L,Bai Y,et al.PSO non-linear pre-stack inversion method and the application in reservoir prediction[A].82th SEG Annual International Meeting,SEG,Extended Abstracts[C].2012.
[11] 朱国军.声波曲线重构技术在储层预测中的应用[J].物探化探计算技术,2017,39(3):383～387.
[12] 张静,王彦春,陈启林,等.储层特征曲线重构技术在储层预测中的应用研究[J].天然气地球科学,2008,19(3):57～60+5.
[13] 贾跃玮,魏水建,游瑜春,等.兴隆气田长兴组生物礁储层预测研究[J].物探与化探,2017,41(4):605～610.
[14] 张学芳,董月昌,慎国强,等.曲线重构技术在测井约束反演中的应用[J].石油勘探与开发,2005,32(3):70～72.
[15] 张星,钱诗友,裴然.曲线重构技术在富安次凹阜三段储层预测中的运用[J].复杂油气藏,2016,9(2):12～14.
[16] 安晶,安鹏,张宏伟,等.多曲线融合技术在储层随机反演中的应用[J].物探与化探,2012,36(4):633～636.