水驱气藏水侵量及水体参数计算方法研究Research on Calculation Methods of Water Influx and Water Body Parameters in Water Drive Gas Reservoir
杨琨,王怒涛,张建民
YANG Kun; et al. (Exploration and Development Research institute of Xinjiang Oilfield Branch Company;Karamay 834000;
摘要(Abstract)：
由于水驱气藏模型无因次水侵量精确解的特殊形式,使得有关计算无因次水侵量的几种方法各有弊端。结合数值反演法计算水侵量,建立计算水驱气藏最优化数学模型,该方法避免了以往需要不容易确定的与水体有关的参数,而这些参数恰好影响地质储量及水侵量的计算准确程度。通过优化模型求解直接获得地质储量及水侵量的大小,同时还可以确定水域大小和水侵系数。通过实例对比分析,证明此方法具有计算过程简单、快速,计算结果准确、实用的特点,不失为一种有效方法。
Several methods to calculate dimensionless water influx have disadvantages due to the particular features of accurate water influx solutions for water drive gas reservoir models. In this paper numerical inversion is applied to calculate water influx, and the optimal mathematic model for calculation in water drive gas reservoir is built. This method needn't to know parameters that are relative to water body and not easy to determine, and the parameters can affect the calculation accuracy of geologic reserves and water influx. According to solution of optimal model, geologic reserves and water influx value can be obtained directly, and water range and water invasion coefficient can also be determined. Examples analysis proves that this method is featured by simple and fast calculation, correct results and practical. It is an effective method.
关键词(KeyWords)：
水驱气藏;水侵量;物质平衡;遗传算法
water drive gas reservoir; water influx; material balance; genetic algorithm
基金项目(Foundation):
作者(Authors):
杨琨,王怒涛,张建民
YANG Kun; et al. (Exploration and Development Research institute of Xinjiang Oilfield Branch Company;Karamay 834000;