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Numerical simulation of wellbore dynamics during underbalanced perforation

Bahrami, H ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.2118/120162-MS
  3. Publisher: 2009
  4. Abstract:
  5. The main objective of perforating is to connect the wellbore to the reservoir zone by creating tunnels through casing and damaged zone into the undamaged rock. The process of detonating perforation charges generally causes damage due to crushed rock material around the perforation tunnels. There are different methods used to mitigate damage due to perforation, such as static and dynamic underbalanced perforation. In static underbalanced perforation, conventional high shot density perforating guns are run in underbalanced conditions in order to have clean-up after perforation. In dynamic underbalanced perforation, a specific gun design associated with gun puncher charges provides dynamic underbalanced conditions across the perforated interval immediately following charge detonation in order to efficiently clean up each single perforation tunnel from crashed rocks and debris. Using deep penetrating charges followed by a dynamic underbalanced can improve well productivity since it mitigates the damage related to perforation. Dynamic underbalanced perforation removes the crushed rocks and debris from the tunnels using a sudden pressure drawdown across the perforated interval immediately after detonating the charges. This study is intended to numerically simulate the dynamic underbalanced conditions after perforation in order to have a better understanding about the phenomenon during perforation process as well as perforation cleanup. The effect of wellbore fluid type on dynamic underbalanced behavior has been simulated to investigate efficiency of dynamic underbalanced in different wellbore conditions, and also three field examples are also shown to verify the simulation results. Copyright 2009, Society of Petroleum Engineers
  6. Keywords:
  7. Charge detonation ; Clean up ; Crushed rock ; Damaged zones ; Numerical simulation ; ON dynamics ; Perforating guns ; Simulation result ; Static and dynamic ; Under-balanced perforation ; Well bore fluids ; Well productivity ; Wellbore ; Wellbore dynamics ; Boring ; Computer simulation ; Debris ; Detonation ; Mining engineering ; Oil field equipment ; Oil wells ; Petroleum engineering ; Petroleum reservoir evaluation ; Rocks ; Solar radiation ; Tunnels ; Wind tunnels ; Perforating
  8. Source: SPE Latin American and Caribbean Petroleum Engineering Conference 2009, LACPEC 09, Cartagena, 31 May 2009 through 3 June 2009 ; Volume 1 , 2009 , Pages 41-50 ; 9781615670994 (ISBN)
  9. URL: https://www.onepetro.org/conference-paper/SPE-120162-MS