石油物探2025，Vol.64Issue(2)：379-387,9.DOI:10.12431/issn.1000-1441.2023.0272
西湖凹陷斜坡带平湖组富煤地层弱煤优化处理
Seismic processing for coal-rich Pinghu reservoirs in the slope zone of the Xihu sag
摘要
Abstract
Thin coal seams in the Pinghu Formation,Pingbei slope zone of the Xihu sag,cause strong seismic reflections and geologic misinterpretation.These strong reflections have a remarkable negative impact on reservoir prediction,including lateral extension and vertical thickness prediction,through seismic inversion.Based on different reflection coefficients of coal-mud-sand associations,we propose an angle-gather conditioning technique to identify and eliminate strong reflections and thus weaken the effect of coal seams.Gather conditioning suppresses strong reflections of coal seams and side lobes and highlights effective signals of sandstone reservoirs.A prestack inversion shows improved reservoir prediction with decreased uncertainties,which offers support to development well drilling and post-drilling evaluation of the Pinghu Formation in the slope zone.关键词
西湖凹陷/富煤地层/强反射分量/弱煤优化处理Key words
Xihu sag/coal-rich formation/strong reflection component/coal effect weakening分类
地质学引用本文复制引用
王腊梅,涂齐催,毛云新,陈易周,娄敏,李炳颖,石子昭..西湖凹陷斜坡带平湖组富煤地层弱煤优化处理[J].石油物探,2025,64(2):379-387,9.基金项目
国家科技重大专项"东海厚层非均质性大型气田有效开发关键技术"(2016ZX05027-004)和中海油有限公司科研生产项目"西湖凹陷在生产油气田中后期综合调整关键技术研究与实践"(CNOOC-KJ 135 ZDXM 39 SH03)共同资助. This research is financially supported by the National Science and Technology Major Project(Grant No.2016ZX05027-004)and the CNOOC Comprehensive Research Project(Grant No.CNOOC-KJ 135 ZDXM 39 SH03). （2016ZX05027-004）
