枯竭气藏地下储气库注采工艺优化

IF 5.5 0 ENERGY & FUELS
Haibin Chang , Tangkun Duo , Bei Li , Kai Wen , Tao Meng , Chenbing Bai , Hongwei Zhang
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引用次数: 0

摘要

本文提出了枯竭气藏地下储气库注采过程优化框架。将优化问题形式化为具有多个约束条件的最小化问题。目标函数是根据压力变化来定义的。此外,还引入了注入(或生产)量、注入(或生产)速率和油藏压力方面的约束条件。引入空间分配系数和时间分配系数作为控制变量。采用基于集成的最小化方法对控制变量进行更新。为了验证所提出的方法,将布鲁日模型修正为枯竭气藏。对一个月和多个月的注入(或生产)优化进行了研究。通过最小化所定义的目标函数,所提出的方法可以为所有井提供最佳的注入(或生产)计划,并可以识别不推荐使用的井。基于储层压力约束,可以对地下储气库在给定时间段内不同注入(或生产)目标的可行性进行评估。该方法对地下储气库的安全、智能化运行具有一定的指导意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimization of the injection-production process of underground gas storage in depleted gas reservoir
In this work, a framework is proposed for optimizing the injection-production process of underground gas storage in depleted gas reservoir. The optimization problem is formulized as a minimization problem with multiple constraints. The objective function is defined with respect to the pressure change. And, the constraints are introduced with respect to the injection (or production) amount, injection (or production) rate, and reservoir pressure. Spatial allocation coefficients and temporal allocation coefficients are introduced as the control variables. Ensemble-based minimization method is adopted for updating the control variables. The Brugge model is modified as a depleted gas reservoir for testing the proposed method. Both one-month and multi-month injection (or production) optimizations are investigated. Through minimizing the defined objective function, the proposed method can provide the optimized injection (or production) plan for all of the wells, and can identify the wells that are not recommended for use. Based on the reservoir pressure constraints, the feasibility of different injection (or production) target within a given time period for an underground gas storage site can be evaluated. The proposed method can be helpful for the safe and intelligent operation of underground gas storage.
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CiteScore
11.20
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