基于流动数据的气藏动态储量计算

A new gas-in-place calculation method based on dynamic data of gas well

刘欣 李继强 胡世莱 杨棽垚 付德奎1

中国石化中原油田普光分公司，四川 达州 635000 重庆科技学院石油与天然气工程学院，重庆 401331

Puguang Branch, Zhongyuan Oilfield Company, SINOPEC, Dazhou 635000, China School of Petroleum Engineering, Chongqing University of Science & Technology, Chongqing 401331, China

基于物质平衡法，综合气体渗流过程、垂直管流模型、气井产能方程和物质平衡方程，提出了一种根据流动数据确定气藏动态储量的新方法。以普光气田主体气藏为例，对该方法的可靠性进行了验证。结果表明：新方法与不稳定分析法计算结果的最大相对偏差为4.40%，最小相对偏差为-0.07%，相对偏差在±5.00%以内，说明新方法计算结果是准确可靠的。新方法实现了气藏动态储量的简便、准确计算，这对正确评价气藏开发效果、准确预测气藏开发动态和做好气藏开发规划具有重要意义。

Based on material balance method, gas flowing stages, vertical pipe flow model, binomial deliverability equation, and material balance equation, a new gas-in-place calculation method was proposed by dynamic data of gas well. In order to prove the reliability of method in this paper, the method was applied in the main gas reservoir, Puguang gas field, for calculation of gas-in-place. Compared with results of the rate transient analysis methods, the maximum of relative deviations of calculation result is 4.40% and the minimum error is -0.07%; all relative deviations are less than ±5.00%. These indicate that the results of this method in this paper are accurate and reliable. Based on this method, gas-in-place could be calculated simply and accurately with dynamic data. This is of great significance for correctly evaluating the development effect of gas reservoirs, accurately predicting the development dynamics of gas reservoirs and developing the gas reservoirs.

10.6056/dkyqt201806009