数值分析法在求解产水气井井底流压的应用  被引量:3

The application of calculating bottomhole flowing pressure in gas wells producing water with numeric analysis method

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作  者:许珍萍[1,2] 江乾锋 刘会会[1,2] 罗建宁[1,2] 张立勤[3] 

机构地区:[1]中国石油长庆油田分公司苏里格气田研究中心,陕西西安710018 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018 [3]中国石油长庆油田分公司第四采油厂,陕西靖边718500

出  处:《石油化工应用》2016年第6期80-83,90,共5页Petrochemical Industry Application

摘  要:苏里格气田是典型的低渗、低压、低丰度致密砂岩气藏,气井产量低、井数多,矿场的动态监测工作量大、成本高,而应用常规气液两相管流计算方法求解气井井底流压需要通过多次迭代循环,过程复杂,需要基础参数多,不利于工程上快速评价。本文通过研究气液两相流动的特点,按照数值分析基本理论,采用最小二乘法分析主要参数的相关性,利用高斯消元法求解气液两相流的线性回归关系式,再结合实测井底流压数值,验证数值方法求解产水气井井底压力的准确性。经对比,其结果良好。Sulige gasfield is typical low-permeability, low pressure and low abundance tight sandstone gas reservior, which has a large number of gas wells with low yield. Dynamic monitoring for thousands of gas wells in Sulige gasfield needs a heavy workload and leads to high cost, while multiple cycle iterative solution methods must be adopted in conventional gas-liquid two-phase pipe flow calculation, which requires a complex process and more basic parameters. This paper discusses gas-liquid two-phase flowing law, tries to make an analysis of some parameters’ relativity on bottomhole flowing pressure by using of least square method, and finally a linear regression equation can be built through Gauss elimination. Accuracy of the regression equation has been testified with field fluids tests. By contrast, the result is reliable.

关 键 词:数值分析 最小二乘法 井底流压 管流计算 高斯消元法 

分 类 号:TE33[石油与天然气工程—油气田开发工程]

 

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