大庆石油地质与开发2025，Vol.44Issue(1) ：131-141.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

关旭 李建海 唐青松 韦滕强 张少敏 王小娟 朱讯
大庆石油地质与开发2025，Vol.44Issue(1) ：131-141.DOI:10.19597/J.ISSN.1000-3754.202308019
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  • 万方数据

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

关旭 1李建海 2唐青松 3韦滕强 1张少敏 1王小娟 1朱讯3
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作者信息

  • 1. 中国石油西南油气田公司勘探开发研究院,四川 成都 610041
  • 2. 福瑞升(成都)科技有限公司,四川 成都 610041
  • 3. 中国石油西南油气田公司,四川 成都 610041
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摘要

针对金秋气田沙溪庙组一段(沙一段)河道砂体普遍致密化、物性差且非均质性强的问题,通过正演模拟优选多种叠前属性,运用三维透视和人工智能反演开展砂体边界、储层和含气性预测,优选致密气开发有利区.结果表明:沙一段Ⅲ、Ⅳ砂组河道最发育,河道集中在西部近物源区,向东宽度明显变窄,Ⅱ砂组和Ⅴ砂组次之,Ⅰ砂组河道数量最少.沙一段储层受分流河道控制明显,Ⅲ砂组和Ⅳ砂组储层厚度普遍大于8 m,呈连片状集中分布在西部JQ8井区,或呈条带状局限分布于东部JQ5H井区,Ⅱ砂组和Ⅴ砂组储层厚度为6～8 m,分别位于西部JQ8井区河道交汇处和东部JQ5H井区分流河道内部.通过人工智能有监督的学习,预测各砂组有利含气区,Ⅲ和Ⅳ砂组含气饱和度高,气藏集中分布在JQ8、JQ5H井区河道交汇处,Ⅱ砂组气藏呈窄条状分布在JQ8和JQ5H井区河道发育区,Ⅴ砂组则局限分布在QL7和JH5井区分流河道内.Ⅲ、Ⅳ砂组河道和储层厚度大,含气饱和度高,是致密气开发重点目的层.研究成果可以为川中地区金秋气田沙一段致密气高效开发提供地质依据.

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

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出版年

2025
大庆石油地质与开发
大庆油田有限责任公司

大庆石油地质与开发

北大核心
影响因子：0.858
ISSN：1000-3754
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