考虑边底水影响的注采井间连通性分析研究

Study of Inter-Well Connectivity Between Injection and Production wells Considering the Influence of Edge-Bottom Water

确定井间连通性常用的方法主要有流线数值模拟和阻容模型,流线数值模拟耗时长、过程繁琐,实际应用较少,而阻容模型仅需生产数据便能客观真实地反映储层的连通情况,具有简单实用有效的特点。但对于具有强边底水能量的油藏,由于水体侵入和待求解参数过多的影响会导致计算结果可靠程度降低。因此,为了准确地评价注采井间的动态连通情况,基于考虑水体侵入影响的CRM模型,根据定性分析结果,对待求解参数进行约束,提高了计算结果的精确度。该方法在南海某油田L油藏进行了实践,并利用示踪剂测试结果验证了连通性分析方法的可靠性。

The common methods to determine inter-well connectivity mainly include streamline numerical simulation and resistance capacitance model.Streamline numerical simulation is time-consuming,complicated and rarely used in practice,while resistance capacitance model only requires production data to reflect the reservoir connectivity objectively and realistically,which is simple,practical and effective.However,for reservoirs with strong edge-bottom water energy,the reliability of calculation results will be reduced due to water intrusion and too many parameters to be solved.Therefore,in order to accurately evaluate the dynamic connectivity between injection and production wells,the accuracy of the calculation results is improved based on the CRM model that considers the influence of water intrusion and constrains the parameters to be solved according to the qualitative analysis results.This method was practiced in L reservoir of an oil field in the South China Sea,and the reliability of the connectivity analysis method was verified by tracer test results.