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提高薄互层低渗透砂岩油藏采收率的有效开发技术
王文环
摘 要:以胜利油田纯41块沙河街组沙四段薄互层低渗透油藏为例,从低渗透油田渗流机理出发,分析了低渗透油田由于存在井距偏大、井网与裂缝匹配不佳、没能适时转注、油藏保护意识薄弱等问题对开发效果的影响.应用渗流机理、地应力场研究成果,提出了低渗透砂岩油藏合理井距确定、井网形式优化、适时增压注水、加强油藏保护等配套开发技术.实施后日产油量、采油速度、日注水量明显提高,含水率、注入压力下降,预测采收率可提高5.23%.因此,该项配套技术对改善该类低渗透油藏开发效果、提高采收率具有广泛的使用意义.
关键词:最小启动压力梯度;非线性流动区;技术极限井距;经济合理井距;低渗透砂岩油藏
分类号:TE313.7 文献标识码:A
文章编号:0253-9985(2006)05-0660-08
Technology of effectively enhancing recovery efficiency in thin-interbedding reservoirs of low-permeability sandstone
Wang Wenhuan
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基金项目:中国石油天然气股份有限公司"九五"重点科技攻关项目(970211)
作者简介:王文环(1965-),女,高级工程师、博士,油气田开发工程
作者单位:王文环(中国石油化工股份有限公司,石油勘探开发研究院,北京,100083)
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