出砂抽油机井间抽时间的确定

Determination of inter-pumping time in sanding production wells

晏海武 綦耀光 张计伟

YAN Haiwu QI Yaoguang ZHANG Jiwei

中国石油大学机电工程学院，山东东营　257061 吉林油田松原采气厂，吉林松原　138003

College of Electromechanical Engineering, China University of Petroleum, Dongying 257061, China Songyuan Mining Gas Plant, Jilin Oilfield, Songyuan 131200, China

供液量不足的出砂井采用间抽工艺时，常因停抽时间过长出现固粒淤积和埋泵等现象。系统地分析了固粒沉降和淤积物的密实过程，并结合相关理论和相应的经验公式，获得了固粒群体沉降速度和一定粒径的固粒淤积物干容重趋于稳定的时间，并获得了泵阀打开条件。根据给定的相应参数，分析固粒群体沉降时间对抽油机间抽时间的影响，求得抽油机间抽的时间，并绘制出间抽时间与固粒浓度、粒径的相应变化曲线。研究可用于低排液量时的抽油机井排砂开采。

When the inter-pumping process is applied to the sand wells with insufficient fluid volume, particles may deposit and the pump may be buried as the off time gets too long. Sand settlement and compacting process of depositing matter are analyzed systematically. Combined with relevant theories and corresponding empirical formula, settling velocity of sand group and the time that the dry bulk density of the depositing matter of certain diameter tends to be stable are obtained, and the opening condition of pump valves is obtained. Based on given corresponding parameters, effect of the settling time of sand group on the inter-pumping time of pumps is analyzed, and the inter-pumping time is obtained. Moreover the correlation curve between the inter-pumping time and the sand concentration or particle diameter is drawn. The study in this paper could provide some ideas for draining sand in oil and gas extraction.