利用压力校正地层系数新方法快速预测气井合理产能  

Establishment of a New and Quick Method for Gas Well Productivity Calculation by Pressure Calculation on Formation Coefficient

作　　者：杨依依 YANG Yiyi(CNOOC International,Ltd.,Beijing 100028,China)

机构地区：[1]中国海洋石油国际有限公司,北京100028

出　　处：《北京石油化工学院学报》2024年第3期42-45,共4页Journal of Beijing Institute of Petrochemical Technology

基　　金：国家科技重大专项(2017ZX05032-004)。

摘　　要：针对海上勘探评价阶段气井测试资料少或无测试的问题,通过对国内海上实际测试数据统计,应用灰色关联分析探寻影响气井初期产能的主控因素,建立了一种考虑压力校正的气井无阻流量与地层系数经验图版,同时采用非线性回归分别建立了不同参数条件下常规气藏和低渗气藏气井无阻流量经验公式系列。某大型深水低渗气田初期产能评价结果表明:新经验公式计算的无阻流量与实际测试分析结果平均误差为3.3%,说明基于压力校正的气井无阻流量确定新方法可以解决海上气田测试少或无测试的问题,为新区块初期产能快速评价及开发方案编制提供依据。Aiming at the problem that there is little or no well test data in offshore gas field,through a large number of data statistics of well test data in domestic offshore gas field,grey correlation analysis is then used to explore the root factors affecting gas well productivity.Firstly,pressure square parameter was introduced to correct gas well productivity and thus establish a new forecast chart with this correction.Meanwhile,non-linear regression is used to establish a series of empirical formulas for gas well productivity in conventional gas field and low-permeability gas field under different conditions.The average error between new formula and actual well tests analysis is about 5.6%,also use chart to quality control calculation results and demonstrate the reliability of this new method.This new method for calculating gas well productivity based on pressure correction can solve the problem of little or no well test offshore gas field and can provide an important reference for a rapid evaluation of gas field productivity of a new block.

关 键 词：海上气田 产能评价 灰色关联 压力平方校正 经验图版 经验公式 

分 类 号：TE353[石油与天然气工程—油气田开发工程]