基于集成代理模型的水驱油藏注采优化方法及应用--以布鲁日油田为例  

Optimization Method and Application of Production Optimization Method for Waterflood Oil Reservoirs Based on an Ensemble Surrogate Model:In Bruges Oilfield as an Example

作　　者：暨梦琪 张雷 杜立滨 张小玫 张紫檀[1] JI Mengqi;ZHANG Lei;DU Libin;ZHANG Xiaomei;ZHANG Zitan(Sinopec Shengli Oilfield Branch,Petroleum Engineering Technology Research Institute,Dongying 257000,Shandong,China)

机构地区：[1]中国石化胜利油田分公司石油工程技术研究院,山东东营257000

出　　处：《科技和产业》2025年第7期9-18,共10页Science Technology and Industry

基　　金：中国石化科技攻关项目(P22023)。

摘　　要：注采优化是闭环油藏管理的重要组成部分,其目的是通过寻找最优的注采参数方案来充分开发油藏潜力,以实现最大的经济效益。在搜索最优方案过程中,数值模拟器的使用极大地增加了时间成本,快速确定最优方案难度大但具有重要工程意义。基于油藏数值模拟模型、优化的时间步数、生产井和注水井控制方式、储层响应以及成本和利润参数等构建水驱油藏注采优化目标函数;根据代理模型采样准则,对代理模型替代数值模拟器参与注采优化的方法进行研究;为解决代理模型缺乏物理意义、寻优过程中难以做到与数值模拟器相同精度的问题,建立集成代理模型关系式。在三通道、Egg两个油藏概念模型上的验证结果表明,提出的集成代理模型优化方法能够在测试的两个概念模型上较常规优化方法经济效益分别提高4.81%、4.75%。为了验证所提方法在实际油田现场管理场景的应用效果,以布鲁日油田为例开展测试。提出的集成代理模型优化方法较常规优化方法经济效益可提高2.45%,可以在解决大规模油藏注采优化问题上取得令人满意的结果。Production optimization is a key component of closed-loop reservoir management,aimed at maximizing economic benefits by fully exploiting reservoir potential through the identification of optimal injection and production parameter schemes.The use of numerical simulators during the search for the optimal solution significantly increases time costs,making it challenging to rapidly determine the best scheme,despite its important engineering implications.An objective function for production optimization in waterflood reservoirs was constructed based on factors such as the reservoir numerical simulation model,optimized time steps,production and injection well control strategies,reservoir responses,and cost and profit parameters.Research was conducted on the method of using surrogate models to replace numerical simulators in production optimization,based on sampling criteria for the surrogate model.In order to address the lack of physical significance in surrogate models and the difficulty in achieving the same precision as numerical simulators during optimization,a relationship for an ensemble surrogate model was established.Validation results on two reservoir models,three-channel and Egg,show that the proposed ensemble surrogate model optimization method improves economic benefits by 4.81%and 4.75%respectively,compared to conventional optimization methods across all tested reservoir models.In order to verify the application effect of the proposed method in the actual oilfield field management scenario,the Bruges oilfield is taken as an example to carry out the test.The proposed integrated agent model optimization method can increase the economic benefit by 2.45%compared with the conventional optimization method.This proves that the proposed method can achieve satisfactory results in solving the problem of injection and production optimization in large-scale reservoirs.

关 键 词：注采优化 集成代理模型 水驱油藏 开发策略 

分 类 号：TE319[石油与天然气工程—油气田开发工程]