| Autor: |
Zeeshan Ahmad, Abdullah Alhaj Al Hosini, Mohammed Ibrahim Al Janahi, Abdulla Mohammed Al Marzouqi, Muhammad Ali Siddiqui, Abdulla Haidar Abdulla Al Zarouni, Reem Mohamad Alhamadi |
| Rok vydání: |
2022 |
| Zdroj: |
Day 1 Mon, October 31, 2022. |
| DOI: |
10.2118/211192-ms |
| Popis: |
Sub-surface safety valves are the integral critical part of the well integrity management and their functionality cannot be compromised at any stage of well life. Unavailability of SSSV's due to integrity issues company was facing serious challenges in production and well availability during high gas demand. Moreover, workover solution led to 7-8 months for completion of workover and reinstatement of surface facilities. In this paper, case studies of different integrity related problems with sub-surface valves discussed and extensive study conducted to restore the critical sub-surface safety system. These case studies highlighted encountered problems such as landing nipple profile damaged due to corrosion/scale, movement of SSSV from its profile, broken flapper during hydraulic frac operation and conversion of TRSSSV to insert type with challenging well interventions issues. High pressure gas well was restored with redressed SSSV by using nipples gauge hanger above the valve to avoid any jumping of newly installed valve due to nipple profile washed out limitation. Insert type valve option evaluated for the same well with 40 MMSCF/D flow and concluded not suitable due to production constraints as ID of IVC was less than 2" which may be suitable for low producers. Special KMH tool designed and E-line utilized for real time monitoring during trouble shooting of TRSSV with broken flapper and successfully resumed the well accessibility for workover operation. Wireless technology can improve the accuracy of response and safety system of wells with limitation of relatively less flow specially in gas wells with scale challenges. Such approach may avoid the work over in case of more accurate control. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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