边底水油藏水体及储层参数定量评价

发布时间：2018-10-22 17:11

【摘要】：对于有强边底水能量的油藏来说,油水关系复杂,一般情况下不具有统一油水界面,边底水的窜进将严重影响油井的产能以及生产的稳定性。油井开发初期,通过有限的钻井等资料全面认识油藏有一定的困难,而准确获得该类油藏的储层参数、水体体积、水侵指数及水侵量是合理开发此类油藏的关键。基于Blasingame现代产能递减分析方法,利用拟稳态水侵模型,推导油藏拟稳态水侵情况下储层参数评价方法,用于计算水侵量、水体体积、水侵指数、动态储量以及各储层参数。该方法首先将油井生产阶段划分为未水侵期、水侵初期及水侵中后期,然后通过未水侵期油井生产动态数据拟合Blasingame典型曲线进行动态储量、储层参数等评价,通过水侵初期油井生产动态数据拟合进行水体体积、水侵量和水侵指数的定量评价。对比数值模拟概念模型生产动态数据和运用所建方法拟合求解结果可知,动态储量误差为-3.31%,渗透率误差为2.60%,水体体积误差为-2.5%,新建方法拟合结果误差在可以接受的范围内,不会对开发方式的制定造成严重影响。
[Abstract]:For reservoirs with strong edge and bottom water energy, the relationship between oil and water is complex, and generally there is no unified oil-water interface. The breakthrough of edge and bottom water will seriously affect the productivity and production stability of oil wells. In the early stage of oil well development, it is difficult to fully understand the reservoir through limited drilling data, but the key to reasonable development of this kind of reservoir is to accurately obtain the reservoir parameters, water body volume, water invasion index and water invasion rate. Based on the modern productivity decline analysis method of Blasingame, the evaluation method of reservoir parameters under quasi-steady water invasion is derived by using quasi-steady water invasion model, which can be used to calculate water invasion, water volume, water invasion index, dynamic reserves and reservoir parameters. In this method, the production stage of oil well is divided into three stages: no water invasion period, water invasion stage and middle and late stage of water invasion. Then the typical Blasingame curve is fitted to evaluate the dynamic reserves, reservoir parameters and so on. The quantitative evaluation of water volume, water invasion volume and water invasion index was carried out by fitting the production performance data of oil wells in the early stage of water invasion. Comparing with the production dynamic data of the numerical simulation conceptual model and fitting the solution with the established method, it can be seen that the dynamic reserve error is -3.31, the permeability error is 2.60, the water volume error is -2.5, and the error of the new method is acceptable. Will not have a serious impact on the development of the development approach.
【作者单位】：中国地质大学(北京)能源学院;中国石油勘探开发研究院油气田开发所;
【基金】：国家科技重大专项“超高压有水气藏高效开发技术”(2016ZX05015-002)和“稠油、碳酸盐岩和致密油藏开发主体技术与应用潜力”(2016ZX05016-006)
【分类号】：TE34

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