半经验法求解地层压力在水驱气藏物质平衡方程中的应用

摘要

The formation pressure is a very important parameter to calculate the water influx and the reserves with material balance method. The semi-empirical method is creatively deduced to solve the formation pressure based on the productivity equation which can solve the difficulties caused by the lack of test data. The initial productivity equation will be established by using productivity test data, the formation pressure at any time will be calculated by itera-tion and then combined with the daily production data using the un-steady water influx calculation method of water invasion, and fine-ly the gas reservoir water and the scale of reserves will be solved, so that it provides new ideas for the solution of the material balance method under the condition of the lack of formation pressure data.%地层压力是物质平衡法计算水侵量以及储量规模的非常重要的参数,创新提出基于产能方程的半经验法求解地层压力,解决缺少测试资料引起的计算困难.由产能测试资料为基础通过迭代计算出任意时刻的地层压力,继而结合日常生产动态资料利用非稳态水侵计算方法求解水侵量,最后求解气藏水侵量以及储量规模,为地层压力资料匮乏情况下水驱气藏物质平衡法的求解提供新的思路.