气举井组及油田优化配气方法研究
首发时间:2004-08-30
摘要:概述了气举井组优化配气的发展现状,分析了各种类型的气举特性曲线的特点。考虑到现场的实用性和合理性,将单井最大产油量值前的气举特性曲线数据拟合为二次多项式方程,并定义井组特性曲线为井组注气量与井组最大产油量的关系曲线。完善了井组优化配气模型并建立了油田优化配气非线性数学模型,并提出了一种求解非线性优化配气模型的新方法——惩罚函数法,为了提高模型的求解速度,提出了一种估计初始注气量的新方法——最大配气量法。惩罚函数法能处理等式约束与不等式约束,收敛速度通常只受初始注气量的影响。应用本文提出的新方法求解了井组及油田配气数学模型,最后给出了A、B井组的配气结果。
关键词: 优化配气 特性曲线 数学模型 非线性约束 惩罚函数法
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an Approach for Optimization of Gas Allocation to a Group of Wells and Oilfield
Abstract:he paper summarizes the developped status quo of the optimization of gas allocation to a group of wells. analysing the characteristics of all types of the gas lift performance curves. Considering the practicability to fields and the rationality, the paper matches the scattered points ahead of maximum value in the gas lift performance curve as quadratic equation. The gas lift performance curve of a group of wells is defined as the relationship between the gas injection rate and the maximum oil production rate. The paper consummates the wells non-linear optimization model of gas allocation and develops the oilfield optimization model of gas allocation, and gives a new method as well “Penalty Function” to solve the non-linear optimization model of gas allocation. To improve the speed of solving the model, a new approach was proposed to guess the initial gas injection rates ── maximum gas allocation. The penalty function may handle both the equation and inequation constraints. As a rule,
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