基于新的渗流模型的致密砂岩油藏多级压裂水平井数值模拟

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• 英文论文题名：The numerical simulation for multi-stage fractured horizontal wells in tight sandstone reservoirs based on new seepage model
• 论文作者：刘海龙 ; 刘俊余 ; 潘岳
• 英文论文作者：Liu Hailong ; Liu Junyu ; Pan Yue
• 年：2017
• 作者机构：中国石化石油勘探开发研究院;河北金融学院;中海油研究总院开发研究院;
• 论文关键词：非线性渗流 ; 新模型 ; 致密砂岩油藏 ; 启动压力梯度 ; 压敏效应
• 英文论文关键词：nonlinear seepage ; new model ; tight sandstone reservoir ; starting pressure gradient ; pressure sensitive effect
• 会议召开时间：2017-03-01
• 会议录名称：《采油工程文集》2017年第1辑
• 英文会议录名称：Oil Production Engineering
• 语种：中文
• 分类号：TE357
• 学会代码：DQGY
• 学会名称：大庆油田有限责任公司采油工程研究院
• 页数：14
• 文件大小：3993k
• 原文格式：D

摘要

为了提高致密砂岩油藏产能模拟精度,基于非线性渗流理论和致密砂岩油藏室内岩心渗流实验,建立了多级压裂水平井新的非线性渗流模型和理想的三维三相油藏数值模拟模型,编制了相应的模拟软件。考虑启动压力梯度和压力敏感效应,对比分析了达西模型、非线性渗流模型和拟线性模型对流体渗流的适应性。研究表明,与达西模型的结果进行比较,非线性渗流时消耗的能量较高,压力水平较低,且产液量小,含水率上升较慢。注入液体到达井筒后,井底流动压力迅速增大,水的前端到达井眼的时间不同。对于非达西渗流,采收率随着水相的启动压力梯度的增大而增大,随着油相的减小而增大。压力敏感系数降低,采收率迅速增加。保持适当的生产压差开发致密砂岩油藏,可减小压敏效应,同时可提高采收率,为开发致密砂岩油藏提供了一定的技术支持。
In order to improve the productivity simulation accuracy of tight sandstone reservoirs, a new nonlinear seepage model and an ideal three-dimensional & three-phase reservoir numerical simulation model for multistage fractured horizontal wells have been established based on the nonlinear seepage theory and indoor core seepage experiments for tight sandstone reservoirs, and a corresponding simulation software has been developed. Considering the starting pressure gradient and the pressure sensitive effect, the adaptability of Darcy model, nonlinear seepage model and pseudo linear model to the fluid seepage has been analyzed comparatively. The research results showed that the nonlinear seepage had high energy consumption, low pressure level, small liquid production rate, and slowly increased water cut compared with the results of the Darcy model. When the liquid is injected into wellbore,the flowing pressure at bottom-hole increases rapidly, and the time for the water front edge to the wellbore would be different. For the non-Darcy flow, the oil recovery efficiency increases with the increase of starting pressure gradient of water phase and the decrease of oil phase. When the pressure sensitive coefficient is reduced, the oilrecovery efficiency will increase rapidly. It can reduce the pressure sensitive effect and enhance the oil recovery by keeping the proper production pressure difference to develop the tight sandstone reservoirs. The technology can provide the technical support for the development of tight sandstone reservoirs.

引文

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