异常高压气藏水侵量计算新方法

发布时间：2018-04-10 11:47

本文选题：物质平衡方程 + 异常高压气藏　；参考：《特种油气藏》2017年06期

【摘要】：利用常规物质平衡方程计算异常高压气藏水侵量,需要知道气井关井监测的稳定地层压力,然而在实际生产过程中,不可能随时关井监测地层压力计算气井水侵情况,且针对异常高压气藏,压力对计算结果影响很大。针对以上问题,利用流动物质平衡方程推导了一种计算异常高压气藏水侵量的新方法,运用无因次压力和采出程度图版,可以在气藏生产过程中不关井,以井底压力计算水侵量,并进行了实例验证。结果表明:新方法计算的水侵量比视地质储量法和图版法更准确,误差小于5%,准确率高,实用性强。该方法解决了异常高压气藏中,随着压力下降而引起的束缚水膨胀和孔隙体积减小等对水侵量带来的影响,为实际气井生产中计算水侵量提供了借鉴。
[Abstract]:It is necessary to know the stable formation pressure of gas well shut-in monitoring by using the conventional mass balance equation to calculate the abnormal high pressure gas reservoir water invasion. However, in the actual production process, it is impossible to monitor the formation pressure at any time to calculate the gas well water invasion.And for the abnormal high pressure gas reservoir, the pressure has a great influence on the calculation results.In view of the above problems, a new method for calculating the water invasion of abnormal high pressure gas reservoirs is derived by using the flowing material balance equation. Using dimensionless pressure and production degree charts, the wells can not be closed in the production process of gas reservoirs.The bottom hole pressure is used to calculate the water intrusion, and an example is given to verify it.The results show that the new method is more accurate than the apparent geological reserves method and the chart plate method, the error is less than 5, the accuracy is high and the practicability is strong.This method solves the influence on water invasion caused by bound water expansion and pore volume decrease in abnormal high pressure gas reservoir with the decrease of pressure, and provides a reference for calculating water invasion amount in actual gas well production.
【作者单位】：中国地质大学(北京);非常规天然气地质评价与开发工程北京市重点实验室;中国石油勘探开发研究院;
【基金】：国家“十三五”重大专项“土库曼斯坦阿姆河右岸裂缝孔隙(洞)型碳酸盐岩气藏高效开发关键技术研究与应用”(2017ZX05030003)
【分类号】：TE37

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