Thin-interbedded reservoirs prediction based on seismic sedimentology

作     者：NI Changkuan SU Mingjun YUAN Cheng LIU Huaqing CUI Xiangli NI Changkuan;SU Mingjun;YUAN Cheng;LIU Huaqing;CUI Xiangli

作者机构：Research Institute of Petroleum Exploration and Development-Northwest(NWGI)PetroChinaLanzhou 730020China University of Electronic Science and TechnologyChengdu 611731China 

出 版 物：《Petroleum Exploration and Development》 (石油勘探与开发（英文版）)

年 卷 期：2022年第49卷第4期

页      面：851-863页

核心收录：

学科分类：0820[工学-石油与天然气工程] 081801[工学-矿产普查与勘探] 081802[工学-地球探测与信息技术] 081803[工学-地质工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

基　　金：Supported by the National Science and Technology Major Project(2017ZX05001-003) PetroChina Science and Technology Major Project(2021DJ0403) 

主　　题：seismic sedimentology thin-interbedded reservoir stratal slice amplitude-frequency spectrum Triassic Kelamayi Formation Junggar Basin 

摘      要：Interference of thin-interbedded layers in seismic reflections has great negative impact on thin-interbedded reservoirs *** deal with this,two novel methods are proposed that can predict the thin-interbedded reservoirs distribution through strata slices by suppressing the interference of adjacent layer with the help of seismic *** plane distribution of single sand bodies in thin-interbedded reservoirs can be clarified.(1)The minimum interference frequency slicing method,uses the amplitude-frequency attribute estimated by wavelet transform to find a constant seismic frequency with the minimum influence on the stratal slice of target layer,and then an optimal slice corresponding the constant frequency mentioned above can be obtained.(2)The superimposed slicing method can calculate multiple interference coefficients of reservoir and adjacent layers of target geological body,and obtain superimposed slice by weighted stacking the multiple stratal slices of neighboring layers and target *** two proposed methods were used to predict the distribution of the target oil layers of 6 m thick in three sets of thin-interbedded reservoirs of Triassic Kelamayi Formation in the Fengnan area of Junggar Basin,Northwestern China.A comparison with drilling data and conventional stratal slices shows that the two methods can predict the distribution of single sand bodies in thin-interbedded reservoirs more accurately.