磨溪区块龙王庙组高压气藏气井产能方程及求解方法  

Productivity equation and solution of gas wells in high pressure gas reservoir of Longwangmiao formation,Moxi block

作　　者：陈春艳[1] 阮基富[1] 吴利华[1] 刘柳君 杨辉[1] 钟礼萍 CHEN Chunyan;RUAN Jifu;WU Lihua;LIU Liujun;YANG Hui;ZHONG Liping(Central Sichuan Oil and Gas District,PetroChina Southwest Oil&Gas Field Company,Suining,Sichuan 629001,China)

机构地区：[1]中国石油西南油气田分公司川中油气矿,四川遂宁629001

出　　处：《油气井测试》2021年第2期67-73,共7页Well Testing

基　　金：中国石油西南油气田分公司科技项目“磨溪区块龙王庙组气藏水侵特征及治水对策优化研究”(20200303-04)。

摘　　要：高压气藏气体高速流动时属于非线性渗流,求取产能方程式中系数A、B值较为复杂和困难。通过引用二项式速度n次方程,推导出相应产能方程,提出试差法先求取指数n及方程系数A、B值,用交会法求解无阻流量。磨溪区块龙王庙组气藏9口气井中,8口井利用产量n次方拟合相关性比产量二次方拟合效果更好,计算结果与气井实际生产动态特征吻合程度高。不同的气井n值一般不同,磨溪龙王庙组气藏n值范围一般介于1~3,确切的数值范围需要现场岩芯渗流试验及更多的气井实例求得。引用二项式速度n次方渗流方程,对龙王庙组气井产能进行研究,求取气井真实产能,可为后期气井生产方案制定提供支撑。The high-speed flow of gas in high-pressure gas reservoir belongs to non-linear seepage,so it is more complex and difficult to calculate the coefficients A and B in productivity equation.In this paper,the corresponding productivity equation is derived by using binomial velocity nth equation,and the trial and error method is used to obtain the exponent n and the coefficients A and B of the equation,and then the intersection method is used to solve the open flow.Among the 9 gas wells in Longwangmiao formation gas reservoir of Moxi block,the nth power fitting correlation of production of 8 wells is better than the quadratic fitting correlation of production,and the calculation results are highly consistent with the actual production performance characteristics of gas wells.The n value of different gas wells is generally different.The n value range of Longwangmiao formation gas reservoir in Moxi block is generally between 1 and 3.The exact value range needs to be obtained by field core seepage test and more gas well examples.The binomial velocity nth power seepage equation is used to study the gas well productivity of Longwangmiao formation and obtain the real gas well productivity,which can provide support for later gas well production plan.

关 键 词：高压气藏 非达西渗流 二项式产量 n次方程 试差法 交会法 产能求解 无阻流量 

分 类 号：TE353[石油与天然气工程—油气田开发工程]