一种确定水驱气藏动态储量及水体能量的新方法  

A new method for determining dynamic reserves and water energy in water drive gas reservoir

作　　者：薛婷[1,2] 吉雨 成良丙 吕昌盛[4] 杨永兴 兰正凯[5,6] XUE Ting;JI Yu;CHENG Liangbing;Lü Changsheng;YANG Yongxing;LAN Zhengkai(Petroleum Exploration and Development Research Institute of PetroChina Changqing Oilfield Company,Xi’an 710018,China;National Engineering Key Laboratory of Low Permeability Oil and Gas Field Exploration and Development,Xi’an 710018,China;Research Institute of Exploration and Development of PetroChina Jilin Oilfield Company,Songyuan 138000,China;Oil and Gas Technology Research Institue of PetroChina Changqing Oilfield Company,Xi’an 710018,China;School of Resources,China University of Geosciences(Wuhan),Wuhan 430000,China;Nanjing Tracy Energy Technology Co,Ltd.,Nanjing 210000,China)

机构地区：[1]中国石油长庆油田公司勘探开发研究院,陕西西安710018 [2]低渗透油气田勘探开发国家工程重点实验室,陕西西安710018 [3]中国石油吉林油田公司勘探开发研究院,吉林松原138000 [4]中国石油长庆油田公司油气工艺研究院,陕西西安710018 [5]中国地质大学(武汉)资源学院,湖北武汉430000 [6]南京特雷西能源科技有限公司,江苏南京210000

出　　处：《大庆石油地质与开发》2022年第1期63-68,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气股份有限公司重大科技专项“长庆油田5000万吨持续高效稳产关键技术研究与应用”(2016E-05)。

摘　　要：动态储量及水体能量作为含水气藏开发过程中的2个关键参数,目前的研究方法及求解方式均基于物质平衡原理,且参数获取及求解过程较为繁琐。以水驱气藏物质平衡原理为基础,建立水驱气藏物质平衡数学理论模型,并引入新的水体能量参数,结合气水两相相渗曲线,在动态储量和水体强度为未知数的条件下,得到累计产气量与累计产水量的关系式,建立了求解动态储量及水体能量参数的最优化模型。实例分析表明:利用本文模型能够较为快速地同时计算出动态储量与水体能量参数;与4种经典方法对比,绝对误差与相对误差均较小,且避免了地层压力测试及水侵量计算过程。敏感性分析表明,随着水体能量的逐渐增大,气藏动态储量逐渐减小,表明了水封气对动态储量的影响较为明显。研究成果为水驱气藏开发研究提供了理论依据。Dynamic reserves and water energy are both important parameters during developing water drive gas reservoirs.The current method to calculate them are both from the foundation of principle of material balance,and the way to get the parameters and solution procedure are both complicated.Based on the principle of material balance equation in water drive gas reservoir,this paper deduces the material balance equation,defines the parameter of water energy,and combines with gas-water relative permeability curve to get the relation between cumulative gas production and cumulative water production including the unknowns of dynamic reserves and water energy parameters,and build an optimization model to solve the dynamic reserves and water energy parameters.Case study shows that dynamic reserves and water energy parameters can be quickly calculated by the new model,and the results calculated by the new method in this paper have less absolute and relative errors than that calculated by 4 classical methods,and using the new model does not need pressure test and water influx calculation.Sensitivity analysis shows that dynamic reserves decreases with water energy increase,indicating that water-trapped gas has much influence on dynamic reserves.The research results provide theoretical basis for the development of water drive gas reservoirs.

关 键 词：水驱气藏 物质平衡 水体能量 动态储量 水侵量 

分 类 号：TE155[石油与天然气工程—油气勘探]