塔河油田大泵径杆式泵深抽工艺技术

塔河油田主力区块为具有底水的奥陶系碳酸盐岩岩溶缝洞型油藏，具有极强的非均质性。目前塔河油田机抽井平均泵挂深度已达2 606 m，动液面在2500m以下的有120口井，占总井数的15.4%，泵挂呈逐年加深的趋势。针对供液不足的油井，为了维持机采井的正常生产，注水补充能量和深抽是仅有的2种解决方法。在单井或单元注水失效的情况下，深抽是提高油井产量和开发效果的主要措施。然而有杆泵小泵深抽存在泵挂深度和泵排量矛盾的问题，为解决深抽排量小的采油工艺难题，塔河油田成功开展了大泵径杆式泵深抽工艺技术，取得了明显的增油效果和经济效益。目前大泵径杆式泵深抽技术已成功应用3井次，增油效果明显。

Deep pumping technology for large sucker rod pump in Tahe Oilfield

The carbonate fractured-vuggy reservoirs with bottom water in Ordovician are most contributive in the Tahe Oilfield, and are characterized by extremely high heterogeneity. The current depth of plunger in the Tahe Oilfield has reached 2 606 m, and is deepening gradually. The working fluid level of 120 wells is below 2 500 m, accounting for 15.4% of total wells. In wells with insufficient liquid supply, water injection and deep pumping are the only ways to maintain normal production. When water injection fails in single well or unit, deep pumping is the main measurement to improve well production and development effect. The next step is to resolve the contradiction between pump setting depth of sucker rod pump and pump output, starting to develop the deep pumping technology of bull pump. The deep pumping technology for large sucker rod pump has been applied successfully in the Tahe Oilfield, and has increased oil production significantly. At present, the technology has been successfully applied for 3 times.