Sucker Rod Pump Re-Design to Enhance the Oil Production Rate at PT Pertamina Hulu Rokan Gerry Sasanti Nirmala (a*), Edi Untoro (a), Mickhael Oratmangun (a), Yesaya Arison Haratua (b)
a) Oil and Gas Production Engineering Polytechnic of Energy and Mineral Akamigas, Jl. Gajah Mada No. 38, Cepu, Blora, Central Java, 58315, Indonesia
* gerry.nirmala[at]gmail.com
b) PT Pertamina Hulu Rokan Zona 4, Jl. Jend. Sudirman No.3, South Sumatera, 31122, Indonesia
Abstract
Sucker Rod Pump (SRP) is one artificial lift with a relatively simple design and easy to operate in oil wells. In this paper, a study is carried out regarding the efficiency of SRP using two wells with different completions, namely directional and vertical wells. There was a decreased production rate in both wells, and the analysis showed that the wells had low productivity. However, the average water cut was relatively low, so production is still expected in the future. Both wells use SRP with the same pump type. The decrease in oil production is suspected to be caused by the reduction of pump efficiency, and analysis showed that the pump efficiency in directional and vertical wells was 40.115% and 38.8% respectively. For this reason, it is necessary to optimize the well by optimizing the installed pump. Some calculations and analyses are discussed regarding the change in the stroke length and pump speed. It managed to increase efficiency up to 87.412% and oil gains up to 8.428 bopd in directional wells. While in vertical wells, pump efficiency rises to 78.621 % with an oil gain of 2.565 bopd.
Keywords: sucker rod pump, efficiency, stroke length, pump speed
Topic: Engineering of Drilling, Production, and production surface and facility
