基于泵功图的油井产液量实时计量新模型  

A New Model Based on Pump Diagram For Measuring Liquid Production Rate of Oil Wells in Real-time

作　　者：陈德春[1] 姚亚[1] 张瑞超 徐悦新 李奇 秦延才[2] 杨康敏[3] 

机构地区：[1]中国石油大学(华东)石油工程学院,青岛266580 [2]胜利油田河口采油厂,山东东营257200 [3]河南油田石油工程技术研究院,郑州473000

出　　处：《科技通报》2017年第11期77-81,共5页Bulletin of Science and Technology

基　　金：中国石化胜利油田分公司项目(编号:YT1508);中国石化科技部项目(编号:P15121)

摘　　要：为了解决油井产液量实时监测困难、基于地面示功图推算产液量误差较大等问题,推导建立了基于泵功图的油井产液量实时计量新模型。根据实时测量得到的油井地面示功图,运用一维带阻尼波动方程计算井下泵功图,并建立泵功图曲线离散点曲率计算模型、固定阀和游动阀开闭点位置识别方法以及柱塞有效冲程计算方法,结合油井产出液物性计算公式,建立油井实际产液量计算模型。经现场48口油井计算分析,计算得到的产液量与实际产液量的最大相对误差为12.63%,最小相对误差为0.41%,平均相对误差为6.57%;相对误差在10%以内的油井有44口,占计算总井数的91.7%。研究结果表明本文的油井产液量计算模型正确可靠,能够提高油井生产分析的及时性,为数字化和信息化油田建设提供技术支持。It is difficult to monitor the liquid production rate of oil wells in real-time, and there has been large error for estimating liquid production rate from dynamometer cards. To solve these problems, a new model based on pump diagrams for measuring liquid production rate of oil wells in real-time was proposed. Combing dynamometer cards collected in real-time and one dimensional wave equation with damping, pump diagrams were obtained. Then the curvature of the data point in pump diagrams, the opening and closing point of the travel valve and fixed valve, the effective length of plunger stroke and properties of fluid were defined, finally the liquid production rate can be estimated. The results from 48 oil wells indicate that calculated liquid production rate was close to actual liquid production rate, the maximum relative error was 12.63%, the minimum relative error was 0.41% and the average relative error was 6.57%. Besides that the number of oil wells whose error was less 10% was 44, accounting for91.7% of the total oil wells. Therefore the new model to measure liquid production rate was accurate and reliable, and it could improve the timeliness of oil wells production analysis and was beneficial to the construction of digital and informationalized oilfield.

关 键 词：产液量 实时计量 泵功图 泵阀开闭点 柱塞有效冲程 信息化油田 

分 类 号：TE355[石油与天然气工程—油气田开发工程]