大庆石油地质与开发2025，Vol.44Issue(5)：52-61,10.DOI:10.19597/J.ISSN.1000-3754.202504049
油田开发后期叠前反演薄储层预测技术及其应用
Pre-stack inversion thin reservoir prediction technology and its applica-tion in late stage of oilfield development
摘要
Abstract
Aiming at the challanges of low prediction accuracy of sporadic thin reservoir sand bodies and poor pro-duction of remaining potential of thin reservoir sand bodies in late stage of oilfield development,research on pre-stack inversion thin reservoir prediction technology is conducted,pre-stack fidelity-preserved seismic gather fre-quency enhancement processing technique is developed,the applicability conditions for pre-stack geostatistical in-version and pre-stack waveform indication inversion are dialectically anaylzed,and the identification accuracy of in-version methods are quantitatively evaluated.The results show seismic frequency bandwidth increases to 6-100 Hz.An innovative dry rock model for reservoirs in late stage of water injection development is constructed,establishing petrophysical chart to quantitatively distinguish sandstone with various thicknesses.The main sandstone reservoirs in studied area are characterized by low P-S wave velocity ratio and low P-wave impedance value,with both parameters decreasing gradually as the increase of sandstone thickness.Identification accuracy of pre-stack inversion for thin interbedded sand bodies with thickness of 1-2 m is up to>81.5％,which is 10 percentage points higher than that of post-stack inversion,improving the prediction accuracy of thin reservoir sand bodies with thinkness of approximately 2m.The research has excellent application effect in fine prediction of thin sand bodies in various blocks of Daqing Placanticline and peripheral oilfields,providing significant support for precise potential tapping of water-chemical flooding in Daqing Placanticline oilfield,reserve increase and oil production stablization in peripheral oilfields.关键词
薄储层预测/叠前反演/地质统计学/波形指示/岩石物理建模/开发后期Key words
thin reservoir prediction/pre-stack inversion/geostatistics/waveform indication/petrophysical mod-eling/late development stage分类
天文与地球科学引用本文复制引用
梁宇,徐立恒,黄伟,陈雷,赵明珠,黄勇..油田开发后期叠前反演薄储层预测技术及其应用[J].大庆石油地质与开发,2025,44(5):52-61,10.基金项目
中国石油天然气股份有限公司重大科技专项"中高渗油田特高含水期大幅度提高采收率技术研究"(2023ZZ22). （2023ZZ22）
