西安石油大学学报（自然科学版）2025，Vol.40Issue(3)：26-38,13.DOI:10.3969/j.issn.1673-064X.2025.03.003
四川盆地金秋气田须三段河道砂体精细刻画与致密气有利区预测
Fine Characterization of Channel Sand-bodies and Prediction of Favorable Areas for Tight Gas in Xu 3 Member of Jinqiu Gasfield,Sichuan Basin
摘要
Abstract
The narrow river channel,thin sand body,and significant differences in gas content are the difficulties that constrain the effi-cient development of tight gas in Xu 3 member of the Jinqiu gasfield.The response characteristics of various types of sand bodies in the Xu 3 member are clarified by forward simulation of sand bodies,and the fine characterization of river channels and the quantitative prediction of reservoirs and gas content are carried out using the pre-stack attributes sensitive to physical properties and gas content and geostatistical inversion and convolutional neural network.The results show that,(1)The Xu 3 member can be divided into two types of sand bodies:medium thickness Class Ⅰ sand-bodies and thin interbedded Class Ⅱ sand-bodies.There are differences in seismic,logging response,and sand-body thickness between the two types of sand bodies.SQ1 and SQ2 gas reservoirs have developed river channels and are composed of thick sand bodies,while SQ3 gas reservoir has narrow river channels and is mainly composed of thin sand-bodies.(2)The Xu 3 member reservoir is controlled by river channel sand-bodies.The reservoirs of SQ1 and SQ3 are concentrated in the Class Ⅰ sand bodies of the northern distributary channel,while the fractures in the southern part of SQ2 are more developed,and the reservoirs are mainly Class Ⅱ sand bodies on the side edge of the channels.(3)A gas content prediction model based on convolutional neural network was established using P+G,near-field superposition and far-field superposition attributes that are sensitive to gas content.The SQ1 gas res-ervoir is located in the QL32 and QL2-Q1 well areas,and its appearance is basically consistent with the distributary channel.The SQ2 and SQ3 gas reservoirs are concentrated in the river channels of the northern FuS1,QL2,QL3,and QL218 wells.(4)Based on the pre-dicted results of sand bodies,reservoirs,fractures,and gas content,the Xu 3 member is divided into two types of favorable zones.The Class Ⅰ favorable area of SQ1 is located in the middle of the distributary channel in the FuS1-QL2-Q1 well area,and the Class Ⅱ favora-ble area is located on the side of the distributary channel in the FuS1-QL2-Q1 well area.The Class Ⅰ favorable areas of SQ2 and SQ3 are located in the middle of the distributary channels in the FuS1-QL32-QL3,QL1,and QL22 well areas,respectively.关键词
砂体预测/地震属性/致密砂岩气/须三段/金秋气田/四川盆地Key words
sand-body prediction/seismic attribute/tight sandstone gas/3rd member of Xujiahe Formation/Jinqiu gasfield/Sichuan Basin分类
地球科学引用本文复制引用
肖柏夷,刘雪,曹脊翔,曾琪,王锦西,李唐律,黄董..四川盆地金秋气田须三段河道砂体精细刻画与致密气有利区预测[J].西安石油大学学报（自然科学版）,2025,40(3):26-38,13.基金项目
中国石油西南油气田公司科技专项"四川盆地中生界陆相含油气系统及气藏分布规律研究"(20230301-08) （20230301-08）
西南油气田公司致密油气勘探开发项目部2023年地震资料处理解释研究专项"川中—川西过渡带须家河组须五段储层及含气性地震预测"(2023-137) （2023-137）
