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针对电容电阻模型在大型成熟油田应用时存在的问题,选用了生产井电容电阻模型(CRMP),提出了其在大型成熟油田的简化应用方法,并进行了实例分析。结合大型成熟油田的特征,给出了CRMP简化推导方法。通过优化求解方法缩短求解时间、提高收敛速率,包括应用全局优化算法,计算CRMP目标函数的解析梯度向量及Hessian矩阵并应用于解算器中,进行参数缩放等,使CRMP可以应用于大型油田。通过逐步历史拟合可提高CRMP模拟结果的可靠性。实例分析结果表明,采用该方法得到的连通性分析结果与生产实际相符,验证了该方法的可靠性。根据CRMP模拟结果,可以有效分析注入井与其周围生产井的连通性,并进行相关分析,例如判断哪些注水井可以改注二氧化碳以及某二氧化碳注入井是否适宜注二氧化碳等。
Aiming at the existing problems of capacitor resistance model in large mature oilfield, the capacitor resistance model (CRMP) of production well was selected and its simplified application method in large mature oilfield was put forward. The case analysis was also given. Combined with the characteristics of large mature oilfields, a simplified derivation method of CRMP is given. The optimization solution method is used to shorten the solution time and improve the convergence rate, including applying global optimization algorithm, calculating analytic gradient vector and Hessian matrix of CRMP objective function and applying it to solver, scaling parameters and so on, so that CRMP can be applied to large oilfields. The gradual historical fit can improve the reliability of the CRMP simulation results. The results of the example analysis show that the results of the connectivity analysis obtained by this method are in good agreement with the actual production, which verifies the reliability of the method. Based on the CRMP simulation results, the connectivity between injection wells and their surrounding production wells can be effectively analyzed and correlated analysis can be made. For example, it can be judged which injection wells can re-inject carbon dioxide and whether a carbon dioxide injection well is suitable for injecting carbon dioxide.