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An Approach To Apply the Gas in the Annulus To Assist Pumping Oil in High-GOR Wells

机译:一种应用气体中气体的方法,以帮助高压井泵送油

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Gas lift is a good artificial lift for those high gas/oil ratio (GOR) wells. But the positive displacement pump is used on many special conditions such as the limitation of high pressure gas, large equipment investment and low remaining recoverable reserve. To decrease the gas into the pump, the gas would generally be separated at bottom hole, then enter the annulus between the tubing and the casing (tubing-casing annulus), eventually flow in air or enter oil pipeline by many control valves at wellhead. In this system, the gas is a potential damage factor to the pump. So the pump efficiency is low and the frequency of pump checkout is high. In this paper, a new approach is presented. One or two gas lift valves are installed on the tubing near the wellhead. The other equipments are same as the conventional system. While the casing pressure reaches the aimed value, high pressure gas in the annulus automatically enter the tubing. This lightens the weight of the fluid in the tubing above the working valve, which assists pumping the liquid. This approach is applied in sucker rod pump system in Wendong oilfield. Dynamometer cards from 2 typical wells indicate that the pump efficiency is improved and the daily fluid production rate is enhanced. Then a similar approach is applied in Electric Submersible Pump system (ESP) and the same good result is obtained. This paper presents the description of this new approach andreports the results obtained in those field trials. The energy-saving theory is analyzed and the design procedure is given.
机译:燃气升力是那些高气/油比(GOR)孔的良好人工升力。但正排量泵用于许多特殊条件,如高压气体,大型设备投资和低剩余可回收储备的限制。为了将气体降低到泵中,气体通常在底部孔中分离,然后进入管道和壳体(管壳环空环)之间的环,最终在空气中流动或通过井口的许多控制阀进入油管。在该系统中,气体是泵的潜在损伤因子。因此,泵效率低,泵结账的频率很高。在本文中,提出了一种新方法。一个或两个气体升降阀安装在井口附近的管子上。其他设备与传统系统相同。虽然壳体压力达到瞄准值,但环中的高压气体会自动进入管道。这使得在工作阀上方的管中的流体的重量减轻,这有助于泵送液体。这种方法应用于WENDONG油田的吸盘杆泵系统。来自2个典型井的测功机卡表明泵效率得到改善,每日流体生产率得到增强。然后在电潜水泵系统(ESP)中应用类似的方法,获得相同的良好结果。本文介绍了这种新方法的描述,并报告了在这些现场试验中获得的结果。分析节能理论并给出了设计过程。

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