南川页岩气地质工程一体化优化中的参数敏感性分析
王惠君 , 卢双舫 , 乔露 , 张俊 , 陈方文 , 何希鹏 , 高玉巧 , 梅俊伟 , 任建华 , 王伟
地球科学 ›› 2023, Vol. 48 ›› Issue (01) : 267 -278.
南川页岩气地质工程一体化优化中的参数敏感性分析
Parameter Sensitivity Analysis in Geology-Engineering Integration Optimization for Shale Gas in Nanchuan Block
,
地质工程一体化综合施策是页岩气降本增效、提高开发效益的重要途径,综合、定量是一体化优化决策研究的重要发展方向.但目前的定量优化更多针对单井进行,常以优化得到的单井最优的裂缝半长/水平井长作为井网部署的依据.在利用运筹学技术构建的单井和区块效益目标函数的基础上,以中国南方海相页岩气为例,对比分析了单井和区块优化结果对主要地质条件和工程参数变化的敏感性.结果表明,尽管随着压裂规模(裂缝半长)的增大,单井和区块的效益都呈现先增后减的趋势,但最优的裂缝半长明显不同.同时,随孔隙度、含气饱和度、压力系数、天然气价格、压裂成本、钻井成本的升高,优化所得的单井和区块的最优裂缝半长变化规律不同.这表明,单井优化的结果不能作为井网部署的依据,区块和单井得到的最优值并不一致,应该以区块地质工程整体一体化优化的结果来布井.这一认识对页岩气及其他非常规油气井网优化部署和效益开发有现实的指导意义.
页岩气 / 地质工程一体化优化 / 敏感性分析 / 多段压裂水平井 / 石油工程
shale gas / geology-engineering integration optimization / sensitivity analysis / multi-stage fractured horizontal well / petroleum engineering
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国家自然科学基金项目(2016ZX05061)
中石化“十条龙”科技专项(P19017-3)
“十三五”国家科技重大专项(2016ZX05061)
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