大庆石油地质与开发2025，Vol.44Issue(3)：139-150,12.DOI:10.19597/J.ISSN.1000-3754.202403015
四川盆地公山庙地区凉高山组地震沉积特征及油气地质意义
Seismic sedimentological characteristics and petroleum geological significance of Lianggaoshan Formation in Gongshanmiao area of Sichuan Basin
摘要
Abstract
In order to determine the sedimentary characteristics and its evolution law of Lianggaoshan Formation in Gongshanmiao area of Sichuan Basin,seismic sedimentology methods including frequency division processing,stra-ta slicing and RGB attributes fusion are used to finely characterize the sedimentary facies of Lianggaoshan Forma-tion constrained by sequence framework and cores.The results show that,Lianggaoshan Formation experienced a complete transgression-regression cycle,and is a complete third-order sequence,which is subdivided into 3 fourth-order sequences including SQ1,SQ2 and SQ3.Affected by provenance from Longmenshan in western area,heavy mineral ZTR index of Lianggaoshan Formation shows growth trend from west to east in Gongshanmiao area,while strata thickness and sand content reduce quickly.Sedimentary facies of Lianggaoshan Formation in Gongshanmiao area are mainly braided river delta fronts and partially braided river delta plains and semi-deep lakes,and are fur-ther subdivided into 6 micro-facies.Multi-attributes RGB fusion results calibrated by core and logging curves show that in SQ1,there are small lake area and shallow water,with mainly sandy sediments in delta plains.In SQ2,huge thick semi-deep lake mud shale deposit with large-scale lake transgression,which are the main hydrocar-bon-source rack shale oil reservoirs in Gongshanmiao area.In SQ3,lake level falls,with large-scale distributary chan-nel sandbodies developed,which are the main tight oil reservoirs in studied area.The research provides theoretical guidance for the prediction of reservoirs distribution in Lianggaoshan Formation in Gongshanmiao area.关键词
沉积特征/层序地层/凉高山组/公山庙地区/四川盆地/属性融合/地震沉积学Key words
sedimentary characteristic/sequence strata/Lianggaoshan Formation/Gongshanmiao area/Sichuan Basin/attributes fusion/seismic sedimentology分类
天文与地球科学引用本文复制引用
曹脊翔,李唐律,刘雪,肖柏夷,李建海,左强..四川盆地公山庙地区凉高山组地震沉积特征及油气地质意义[J].大庆石油地质与开发,2025,44(3):139-150,12.基金项目
中国石油西南油气田公司科技专项"四川盆地中西部地区致密气成藏条件及物探关键技术研究"(2022ZD01-01) （2022ZD01-01）
中国石油西南油气田公司2022年勘探配套地震资料处理解释研究项目"西浅1井区凉高山组储层及含气性地震预测研究"(2022-145). （2022-145）
