Optimasi Sumur Gas Lift XX dengan Nodal Analysis di PT Pertamina EP ASSET 2 Field Prabumulih

Faazir Aal Dito Maulana;

doi:10.37525/sp/2020-1/219

Optimasi Sumur Gas Lift XX dengan Nodal Analysis di PT Pertamina EP ASSET 2 Field Prabumulih

Majalah Ilmiah Swara Patra ◽

10.37525/sp/2020-1/219 ◽

2020 ◽

Vol 10 (1) ◽

pp. 31-38

Author(s):

Faazir Aal Dito Maulana ◽

Keyword(s):

Check Valve ◽

Nodal Analysis ◽

Gas Lift

Sumur XX merupakan salah satu sumur minyak di Lapangan Prabumulih yang berproduksi secara sembur buatan (continuous gas lift). Saat ini, sumur XX berproduksi pada laju alir 775 blpd, laju alir gas injeksi sebesar 0.3 mmscfd, tekanan kick off sebesar 560 psi tekanan surface operation sebesar 460 psi, tekanan resevoir 2200 psi, GLR formasi 193 scf/bbls dan 95% watercut. Dari hasil analisis nodal, didapatkan laju alir optimum sumur sebesar 895 blpd pada laju alir gas injeksi sebesar 1. mmscfd. Penentuan gas lift spacing di dapat 6 valve yaitu 5 unloading valve dan 1 check valve dengan ukuran port 16/64 inch.

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Lessons Learnt from Integrated Production Modelling and Performance Analysis of Gas Lift Wells of One of the Biggest Offshore Complexes in India

10.2118/205611-ms ◽

2021 ◽

Author(s):

Sagun Devshali ◽

Ravi Raman ◽

Sanjay Kumar Malhotra ◽

Mahendra Prasad Yadav ◽

Rishabh Uniyal

Keyword(s):

Performance Analysis ◽

Flow Line ◽

Gas Injection ◽

Injection Rate ◽

Oil Wells ◽

Nodal Analysis ◽

Integrated Production ◽

And Performance ◽

Gas Lift ◽

Production Modelling

Abstract The paper aims to discuss various issues pertaining to gas lift system and instabilities in low producer wells along with the necessary measures for addressing those issues. The effect of various parameters such as tubing size, gas injection rate, multi-porting and gas lift valve port diameter on the performance analysis of integrated gas lift system along with the flow stability have been discussed in the paper. Field X is one of the matured offshore fields in India which has been producing for over 40 years. It is a multi-pay, heterogeneous and complex reservoir. The field is producing through six Process Complexes and more than 90% of the wells are operating on gas lift. As most of the producing wells in the field are operating on gas lift, continuous performance analysis of gas lift to optimize production is imperative to enhance or sustain production. 121 Oil wells and 7 Gas wells are producing through 18 Wellhead platforms to complex X1 of the field X. Out of these 121 oil wells, 5 are producing on self and remaining 116 with gas lift. In this paper, performance analysis of these 116 flowing gas lift wells, carried out to identify various problems which leads to sub-optimal production such as inadequate gas injection, multi-porting, CV choking, faulty GLVs etc. has been discussed. On the basis of simulation studies and analysis of findings, requisite optimization/ intervention measures proposed to improve performance of the wells have been brought out in the paper. The recommended measures predicted the liquid gain of about 1570 barrels per day (518 barrels of oil per day) and an injection gas savings in the region of about 28 million SCFD. Further, the nodal analysis carried out indicates that the aforementioned gas injection saving of 28 million SCFD would facilitate in minimizing the back pressure in the flow line network and is likely to result in an additional production gain of 350 barrels of liquid per day (65 barrels of oil per day) which adds up to a total gain of 1920 barrels of liquid per day (583 barrels of oil per day). Additionally, system/ nodal analysis has also been carried out for optimal gas allocation in the field through Integrated Production Modelling. The analysis brings out a reduction in gas injection by 46 million SCFD with likely incremental oil gain of ~100 barrels of oil per day.

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Nodal Analysis for SAGD Production Wells with Gas Lift

10.2118/174521-ms ◽

2015 ◽

Cited By ~ 1

Author(s):

Grant J. Duncan ◽

Scott A. Young ◽

Phillip E. Moseley

Keyword(s):

Nodal Analysis ◽

Production Wells ◽

Gas Lift

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Gas Lift Nodal-Analysis Model Provides Economical Approach to Optimization

Journal of Petroleum Technology ◽

10.2118/0715-0093-jpt ◽

2015 ◽

Vol 67 (07) ◽

pp. 93-95

Author(s):

Adam Wilson

Keyword(s):

Analysis Model ◽

Nodal Analysis ◽

Gas Lift

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Comparison of Leakage Characteristics of Viton and Polytetrafluoroethylene Seals in Gas-Lift Valve Applications

Journal of Energy Resources Technology ◽

10.1115/1.4034512 ◽

2016 ◽

Vol 139 (1) ◽

Cited By ~ 3

Author(s):

Bodhayan Dev ◽

Omprakash Samudrala ◽

Jifeng Wang

Keyword(s):

Enhanced Oil Recovery ◽

Oil Recovery ◽

Test Chamber ◽

Check Valve ◽

Injection Pressure ◽

Working Fluid ◽

Element Analysis ◽

Sealing Material ◽

Leakage Characteristics ◽

Gas Lift

The present research article focuses on comparing the leakage characteristics of Viton and polytetrafluoroethylene (PTFE) seals used in enhanced oil-recovery system. The objective of the study is also to validate if each sealing material met the stringent gas leakage requirements of less than 2 SCCM as required by several enhanced oil recovery systems. The present effort mainly deals with the gas-lift valve barrier check valve applications. The article describes the development of a high-pressure (HP) test rig for measuring the performance of seals in barrier check valves. The rig is capable of measuring valve leakage at pressures up to 10,000 psi with either gases or liquids. A boost pump is employed for achieving pressures greater than 2000 psi (typical nitrogen bottle pressure). Rig validation tests were conducted on a check valve that is part of an injection-pressure-operated (IPO) gas lift valve. A test chamber was fabricated to contain the check valve and was mounted inside the enclosure to evaluate the performance of each sealing material and validate the rig capabilities using water and nitrogen as the working fluid. Finite-element analysis (FEA) on each sealing composition under 100 and 10,000 psi were performed to determine contact pressures and identify appropriate contact pairs at each pressure differentials. It is observed that a brand new PTFE seal never seals efficiently unless it is subjected to a pressure sweep. Viton seals appeared to be insensitive to the pressure sweep as it effectively sealed for the entire pressure range.

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Gas-Lift Nodal Analysis Model - Economical Optimization Approach

10.2118/171345-ms ◽

2014 ◽

Cited By ~ 1

Author(s):

Mustafa Al-Lawati

Keyword(s):

Optimization Approach ◽

Analysis Model ◽

Nodal Analysis ◽

Economical Optimization ◽

Gas Lift

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Optimisation of Artificial Lifts Using Prosper Nodal Analysis for BARBRA-1 Well in Niger Delta

Nigerian Journal of Technological Development ◽

10.4314/njtd.v17i3.1 ◽

2020 ◽

Vol 17 (3) ◽

pp. 150-155

Author(s):

Tega Odjugo ◽

Yahaya Baba ◽

Aliyu Aliyu ◽

Ndubuisi Okereke ◽

Lekan Oloyede ◽

...

Keyword(s):

Niger Delta ◽

Hydrocarbon Exploration ◽

Productivity Index ◽

Submersible Pump ◽

Well Performance ◽

Power Losses ◽

Nodal Analysis ◽

Artificial Lift ◽

Electrical Submersible Pump ◽

Gas Lift

Hydrocarbon exploration basically requires effective drilling and efficient overpowering of frictional and viscosity forces. Normally, frictional power losses occur in deep well systems and it is essential to analyse each component of any well system to determine where exactly pressure is lost, and this can be done using Nodal Analysis. In this study, nodal analysis has been carried out with the use of PROSPER, a software for well performance, design and optimisation. Artificial lifts can then be used to solve the problem of frictional power losses. To increase the production of Barbra 1 well in the Niger Delta and hence extend its functional life, we have applied nodal analysis. Modelling results for three artificial lift methods; continuous gas lift, intermittent gas lift and electrical submersible pump were found to be 1734.93 bbl/day, 451.50 bbl/day and 2869 bbl/day respectively. The output from the well performance without artificial lift was 1370.99 bbl/day by applying Darcy’s model. Meanwhile, the output from the well without artificial lift is 89.90 bbl/day when aided with productivity index (PI) entry, the normal model for intermittent gas lift. Hence, from the comparative analysis of the results obtained from this study, it was deduced that when artificial lifts are employed, the well output increases significantly from 1370.99bbl/day to 2869 bbl/day (electrical submersible pump). This study concludes that wells such as Barbra 1 are good candidates for artificial lift, and this is evidenced by increasing productivity. Keywords: Production optimisation, nodal analysis, prosper simulator and barbra well.

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Design of a Thermally-Actuated Gas Lift Safety Valve

Volume 2: Structures, Safety and Reliability ◽

10.1115/omae2011-49927 ◽

2011 ◽

Author(s):

Eric Gilbertson ◽

Franz Hover ◽

Jose Arellano ◽

Bryan Freeman

Keyword(s):

Thermal Model ◽

Safety Valve ◽

Extreme Temperature ◽

Check Valve ◽

Start Up ◽

Valve Opening ◽

Temperature And Pressure ◽

Thermally Actuated ◽

Well Data ◽

Gas Lift

Gas-lifted oil wells are susceptible to failure through malfunction of gas lift valve assemblies (GLV). One failure mode occurs when the GLV check valve fails and product passes into the well annulus, potentially reaching the wellhead. This is a growing concern as offshore wells are drilled thousands of meters below the ocean floor in extreme temperature and pressure conditions, and repair and monitoring become difficult. Currently no safeguard exists in the GLV to prevent product passage in the event of check valve failure. In this paper a design and operational procedures are proposed for a thermally-actuated positive-locking safety valve to seal the GLV in the event of check valve failure. A thermal model of the well and GLV system is developed and compared to well data to verify feasibility of a thermally-actuated safety valve. A 3× scale prototype safety valve is built and tested under simulated failure scenarios and well start-up scenarios. Realistic well temperatures in the range of 20C to 70C are used. Results demonstrate valve closure in response to simulated check valve failure and valve opening during simulated well start-up.

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