| Autor: |
N Hajjar Salleh, Bambang Noor Alam, Thesigan Devan, Danny Aryo Wijoseno, M Farid B M Amin, Zailily Johan, Wee Wei Wa, Sammy Haddad, Ko Ko Kyi, A Afiq Yaakob |
| Rok vydání: |
2016 |
| Předmět: |
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| Zdroj: |
Day 2 Tue, November 15, 2016. |
| Popis: |
Horizontal wells have been an important development option for oil production due to the increased exposure to the hydrocarbon bearing interval in the long open section. Nevertheless, there are several typical complications associated with the horizontal well production. Firstly, the barefoot completion often collapses after certain period of production and to prevent that, a slotted liner is installed across the open-hole section to provide required mechanical support and improve the wellbore stability. Next, the permeability distribution can be in great contrast from heel to toe and this necessitates the installation of an inflow control device (ICD) to avoid premature gas or water breakthrough that can easily kill the oil production. All the aforementioned completions, while helping to optimise the oil production, can complicate further the flow regime in the horizontal section and make production monitoring very difficult. The questions like phase stratification, flow behind slotted liner and production source for fluid entering ICD need to be answered for accurate production diagnostics in such horizontal completions. This paper presents successful production diagnostic work performed in a problematic and complex long horizontal oil well, completed with both slotted liner and ICD. The well has been suffering from increasing GOR three weeks into production in year 2012 and was produced with the lowest choke size since then and eventually shut off to avoid excessive gas production. The source of the gas needed to be identified to perform gas shut-off. The production diagnostic work started with thorough clean-out of the long horizontal slotted liner and ICD sections via active coil tubing. The clean-out was proven to be efficient and the well was successfully beaned up to high oil production rate for subsequent flow profile diagnostics. The complex flow regime in this complicated horizontal completion was well identified by the multi-spinner, multi probe production logging (PL) tool deployed using the active coil tubing. The production log interpretation, the historical production plot and the surface well test results were integrated and provided the required information to determine the forward production strategy in this horizontal oil producer. The planning and the implementation of active coil tubing cleaning and multi-spinner, multi probe PL, as well as lessons learned and best practices throughout this production diagnostic work, will be discussed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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