Facies-controlled prediction of dolomite reservoirs in the Middle Permian Qixia Formation in Shuangyushi,northwestern Sichuan Basin

作     者：Chao Zheng Benjian Zhang Rongrong Li Hong Yin Yufeng Wang Xin Hu Xiao Chen Ran Liu Qi Zeng Zhiyun Sun Rui Zhang Xingyu Zhang Weidong Yin Kun Zhang 

作者机构：Exploration and Development Research InstitutePetroChina Southwest Oil&Gas Field CompanyChengduSichuan610500China Northwest Sichuan Gas BranchPetroChina Southwest Oil&Gas Field CompanyJiangyouSichuan621709China PetroChina Southwest Oil&Gas Field CompanyChengduSichuan610500China School of Geosciences and TechnologySouthwest Petroleum UniversityChengduSichuan610500China 

出 版 物：《Energy Geoscience》 (能源地球科学（英文）)

年 卷 期：2024年第5卷第2期

页      面：21-30页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0709[理学-地质学] 081803[工学-地质工程] 070901[理学-矿物学、岩石学、矿床学] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

主　　题：Reservoir prediction Seismic facies Shoal-facies dolomite Qixia formation Shuangyushi Sichuan basin 

摘      要：The Middle Permian Qixia Formation in the Shuangyushi area,northwestern Sichuan Basin,develops shoal-facies dolomite *** pinpoint promising reservoirs in the Qixia Formation,deep thin shoal-facies dolomite reservoirs were predicted using the techniques of pre-stack Kirchhoff-Q compensation for absorption,inverse Q filtering,low-to high-frequency compensation,forward modeling,and facies-controlled seismic meme *** results are obtained in six ***,the dolomite reservoirs mainly exist in the middle and lower parts of the second member of Qixia Formation(Qi2 Member),which coincide with the zones shoal cores are ***,the forward modeling shows that the trough energy at the top and bottom of shoal core increases with increasing shoal-core thickness,and weak peak reflections are associated in the middle of shoal ***,five types of seismic waveform are identified through waveform analysis of seismic ***-Ⅰ and Type-Ⅱ waveforms correspond to promising facies(shoal core microfacies).Fourth,vertically,two packages of thin dolomite reservoirs turn up in the sedimentary cycle of intraplatform shoal in the Qi2 Member,and the lower package is superior to the upper package in dolomite thickness,scale and lateral ***,in plane,significantly controlled by sedimentary facies,dolomite reservoirs laterally distribute with consistent thickness in shoal cores at topographical highs and extend toward the ***,the promising prospects are the zones with thick dolomite reservoirs and superimposition of horstegraben structural traps.