大庆石油地质与开发2025，Vol.44Issue(1)：131-141,11.DOI:10.19597/J.ISSN.1000-3754.202308019
川中地区金秋气田侏罗系沙一段有利含气区预测
Prediction of favorable gas-bearing areas in Jurassic Sha 1 Member of Jinqiu gas field in central Sichuan Basin
摘要
Abstract
In view of the problems of widespread tightness,poor property and high heterogeneity of channel sand-bodies in Member 1 of Shaximiao Formation(Sha 1 Member)in Jinqiu gas field,multiple pre-stack attributes are optimized by forward modeling,and 3D perspective and artificial intelligence inversion are used to predict sandbod-ies boundaries,reservoirs and gas content.Favorable areas for tight gas development are optimized.The results show that channels in Ⅲ and Ⅳ sandstones of Sha 1 Member are most developed and concentrated in western area near provenance with width decreased significantly towards the east,channels in Ⅱ and Ⅴ sandstones are secondly developed,andⅠsandstone has the fewest channels.Reservoirs in Sha 1 Member is significantly controlled by dis-tributary channels,and reservoir thicknesses of Ⅲ and Ⅳ sandstones are generally larger than 8 m,contiguously distribute concentratedly in western JQ8 well block,or strippedly distributed limitedly in eastern JQ5H well block.Reservoir thicknesses of Ⅱ and Ⅴ sandstones are 6～8 m,located at confluence of channels in JQ8 well block and within distributary channels in JQ5H well block,respectively.Favorable gas-bearing areas in sandstones are pre-dicted via supervised learning of artificial intelligence.Ⅲ and Ⅳ sandstones have high gas saturation,and gas reser-voirs distribute concentratedly at confluence of channels in JQ8 and JQ5H well blocks.Gas reservoirs in Ⅱ sand-stone distribute as narrow strips in channel-developed areas of JQ8 and JQ5H well blocks.Gas reservoirs in Ⅴ sand-stone distribute limitedly in distributary channels of QL7 and JH5 well blocks.Ⅲ and Ⅳ sandstones have large chan-nel and reservoir thicknesses and high gas saturation,which are key target layers for tight gas development.The re-search provides geologic basis for high efficient development of tight gas in Sha 1 Member of Jinqiu gas field in cen-tral Sichuan area.关键词
砂体预测/地震属性/致密砂岩气藏/沙一段/金秋气田/川中地区Key words
sand body prediction/seismic attribute/tight sandstone gas reservoir/Sha 1 Member/Jinqiu gas-field/central Sichuan area分类
能源科技引用本文复制引用
关旭,李建海,唐青松,韦滕强,张少敏,王小娟,朱讯..川中地区金秋气田侏罗系沙一段有利含气区预测[J].大庆石油地质与开发,2025,44(1):131-141,11.基金项目
西南油气田公司重大科技专项"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）
