| 摘要: |
| 油藏生产优化是把对油藏生产体系的控制描述成一个最优化问题,通过求解最优化问题得到油藏生产的最优 控制。首先利用数值方法得到目标蚋数的近似梯度,然后利用投影梯度方法将近似梯度投影到吋行方向1:,在可行 方向上进行线性搜索,得到满足约束条件的最优解。通过计算案例，对两种近似梯度方法的优化效果与利用有限差 分法得到的梯度的优化效果进行对比。优化得到的调控方案可以满足约束要求,并且能够有效改善注水开发效果， 大幅度增加油田的经济效益。 |
| 关键词: 油藏 约束生产优化 近似梯度 边界约束 投影梯度方法 优化方案 |
| DOI：10.3969/j.issn.1673-5005.2012.02.021 |
| 分类号:TE 323 |
| 基金项目:B家n然科学基金项H(61004095);国家科技?大专项课题(2011ZX05024 - 002-008):教育部!a等学校博士学科点专项科研 基金项0(20)00133120003) |
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| Constrained reservoir production optimization |
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YAO Jun1,WEI Shao-lei1,ZHANG Kai1,JIANG Jin-kui2
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(1.School of Petroleum Engineering in China University of Petroleum Qingdao 266580, China;2. Central Institute of Oil Logistics Department, Beijing 102399, China)
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| Abstract: |
| The control of a reservoir system was described as an optimal problem by using reservoir production optimization, and the best control strategy can be acquired. In order to deal with the constrained problems，first，the approximate gradient of object fiinction was obtained by numerical method. Then, the approximate gradient was projected to feasible direction by projection gradient method. Finally t the constrained optimal solution was obtained by line searching on the feasible direction. The effects of two gradient-approximation methods were compared with that of real gradient calculated by finite differential method by calculating reservoir case. The acquired control strategy satisfies all of the constraints and improves the effect of waterflooding development and economic effect significantly. |
| Key words: reservoirs constrained reservoir production optimization approximate gradient boundary constraints projection gradient method optimum control strategy |
