泡沫段对某开发区抽油机井系统效率计算结果的影响

Effect of Foam Section on Calculation Results of System Efficiency of Pumping Wellsin a Development Area

抽油机井系统效率主要由产液量、举升高度和电动机有功功率三个参数组成,举升高度由动液面折算得到。它受天然气溢出和抽油泵呼吸作用,形成低密度泡沫段,使系统效率计算结果偏低;为研究泡沫段对系统效率计算结果产生的影响,将消泡剂用掺水溶解加入油、套环形空间,消除泡沫段,试验前后录取测试、生产数据进行对比和计算。某开发区进行221口井消泡试验结果表明,平均泡沫段高度为34.34 m,影响系统效率1.84个百分点;利用试验结果,对该开发区同期抽油机井系统效率进行调整计算,系统效率提高1.58个百分点。

The efficiency of pumping well system is mainly composed of three parameters:liquid production,lifting height and motor active power.The lifting height is obtained by the conversion of liquid level.It is affected by natural gas overflow and sucker rod pump to form a low density foam section,resulting in low efficiency of the system efficiency.In order to study the effect of foam section on the calculation results of system efficiency,the defoaming agent is dissolved in water and added to the oil and annular space to eliminate the foam section.The admission test and production data are compared and calculated before and after the test.The defoaming test of 221 wells in a development area shows that the height of the average foam section is 34.34 m,which affects the system efficiency by 1.84 percentage points.Based on the test results,the system efficiency of the synchronous pumping well in the development zone is adjusted and calculated,and the system efficiency is increased by 1.58 percentage points.