Improves Sucker Rod and Tubing Lifetime Applying the Wear Predict 99 Equation

T. Hidayat, F. Kurniawan, Jalu Waskito Aji Nugroho, A. Wibowo, P. I. Amal, Sebastianus Riskadarto
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Abstract

Finding new oil and gas that can be developed economically is getting more difficult and challenging today. To meet the oil and gas demand, it is therefore important to focus on the existing and already developed assets by applying new and more efficient technology and optimizing the use of existing equipment to increase production performance of the asset thus better recovery. Sangasanga Field as mature oil field of Pertamina EP is producing its oil by the assistance of artificial lift. The artificial lifts applied in Sangasanga field are Sucker Rod Pump (SRP), Electrical Submersible Pump (ESP) and Hydraulic Pumping Unit (HPU) where SRP dominates with 84 units installed while ESP and HPU are 25 units and 15 units respectively. According to the data of well service work history from 2018 to 2020, the failure of SRP and HPU was quite high. The main problem observed were the occurrence of leaking tubing and broken sucker rods. The study gathered the occurrence of failure and a method so called "WEAR PREDICT 99" was created to estimate SRP's buckling point and lifetime. WEAR PREDICT 99 is a correlation derived from comparing neutral point calculated from formula with actual leak data of broken pipe or suction rod. The correlation then used for predicting the buckling point that represents the probable location of the leaking pipe or damaged suction rod. This correlation allows to predict when and where the sucker rod will leak or break, therefore preventive measures to increase the lifetime of the SRP and HPU wells can be taken.
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应用磨损预测99方程提高抽油杆和油管寿命
如今,寻找可以经济开发的新石油和天然气变得越来越困难和具有挑战性。因此,为了满足油气需求,重点关注现有和已经开发的资产,应用新的、更高效的技术,优化现有设备的使用,以提高资产的生产性能,从而提高采收率。作为Pertamina EP的成熟油田,Sangasanga油田正在利用人工举升技术进行采油。Sangasanga油田应用的人工举升主要有有杆泵(SRP)、电潜泵(ESP)和液压抽油机(HPU),其中SRP占主导地位,安装了84台,而ESP和HPU分别为25台和15台。根据2018年至2020年的井服工作历史数据,SRP和HPU的故障率相当高。观察到的主要问题是油管泄漏和抽油杆断裂。该研究收集了失效的发生情况,并创建了一种称为“磨损预测99”的方法来估计SRP的屈曲点和寿命。磨损预测99是将公式计算的中性点与破裂管道或抽油杆的实际泄漏数据进行比较得出的相关性。然后用这种相关性来预测屈曲点,该屈曲点代表泄漏管道或损坏吸油杆的可能位置。这种相关性可以预测抽油杆何时何地会泄漏或断裂,因此可以采取预防措施来延长SRP和HPU井的使用寿命。
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