摘要
ZJ气田沙溪庙组气藏具有河道窄、砂体薄、储层致密的特征,前期采用陈元千“一点法”经验公式(α=0.25)计算无阻流量与系统产能测试相比数值普遍偏小,需建立相应的产能评价方法。基于压力恢复试井资料,采用解析分析以及数值模拟方法对ZJ气田多口井进行研究。通过对气井进行系统产能试井模拟,回归建立了气井二项式产能方程,并对该区气井“一点法”经验公式进行了校正。校正后的“一点法”产能公式更加合理,气井产能评价精度提高了10%,为窄河道致密砂岩气藏合理高效开发提供了依据。
The Shaximiao gas reservoir in Zhongjiang gasfield has the characteristics of narrow rivers, thin sand body and tight reservoir. The open-flow potential of the gas well calculated by the technology of one-point well testing (α=0.25) which was proposed by Chen Yuanqian is generally lower than its actual productivity, so it is necessary to establish a new method for productivity evaluation of Zhongjiang gasfield now. In this paper, based on data of pressure recovery well test, multiple wells in the Zhongjiang gasfield were studied by analytical and numerical simulation. Through the simulation of production test of the gas well, the binomial productivity equation was established and the α value of one-point well testing formula in this area was corrected. The corrected formula of one-point well testing technique is more reasonable, and the accuracy of productivity evaluation of the gas well is improved by 10 %, which provides a basis for the rational and efficient development of tight sandstone gas reservoirs with thin and narrow rivers.
作者
李南颖
LI Nanying(Exploration & Production Research Institute,Southwest Oil & GasCompany,Sinopec,Chengdu Sichuan 610041,China)
出处
《石油化工应用》
CAS
2019年第6期6-12,共7页
Petrochemical Industry Application
基金
国家科技重大专项“低丰度致密低渗油气藏开发关键技术”,项目编号:2016ZX05048
关键词
致密砂岩
一点法
产能评价
数值模拟
tight sandstone
one-point well testing
production evaluation
numerical simulation
