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随着对油气的开采,塔河油田普遍出现油井供液不足,泵效低,悬点载荷增大,调参困难等问题。通过对现场情况的分析及二次采油新技术的研究应用,拓展形成以新型抽油泵为基础,多种长冲程抽油机配套使用的深井抽油工艺。该深抽工艺现场应用20井次,累计增油8.7×104t;其中,侧流减载泵已实现最深泵挂已达到5250m。以测流式抽油泵为基础,对比分析其工作原理以及在井筒内受力情况,建立其在油井深抽条件下的悬点载荷计算模型,经过分析论证得出,与普通抽油泵相比,在杆柱上行与下行过程中,对抽油机载荷的要求均有明显的降低,有益于深井抽油。通过实例计算,对比发现侧流式深抽泵比普通管式泵的最大、最小载荷均降低10KN以上,说明其在深井抽油工艺中具有很大潜力。
With the exploitation of oil and gas, Tahe Oilfield generally has some problems such as inadequate oil well supply, low pump efficiency, increased load at hanging point and difficulty of adjustment. Based on the analysis of the site conditions and the research and application of new technologies for secondary oil recovery, a deep well pumping technology that complements the use of a variety of long-stroke pumping units based on a new oil pump is developed. The deep-pumping technology used 20 wells on site, with a total increase of 8.7 × 104t. Among them, the deepest pump hanging has reached 5250m. Based on the flow-measuring pump, the operating principle and the stress in the wellbore are compared and analyzed. The calculation model of the load at the point of deep well pumping is established. Through analysis and demonstration, it is found that compared with the conventional pump, In the course of the up and down poles, the load requirements on the pumping unit are significantly reduced, which is beneficial to deep well pumping. The calculation results show that the maximum and minimum loads of the side-flow deep-pumping pump are both lower than 10KN compared with that of the common one, which shows that it has great potential in deep well pumping.