Creation of new perforations (holes) in oil well tubing, opposite to oil-bearing reservoir zones, creates more opportunity for fluid to drain from the formation into the wellbore. Re-perforation is creating new perforations in the oil well tubing just opposite to the oil-bearing reservoir zones. This is done to create more opportunities to increase the drainage from the pay-zone to the wellbore. Re-perforation is also done while plugging the previous perforation due to skin formation near the wellbore area.
Re-perforation of a well is one of the most advantageous and inexpensive operations that can be done virtually at any point in a well’s life. The productivity of the perforated wells is controlled by several perforating parameters such as perforation length, perforation diameter, degree of the damage around the perforation tunnels, shot density, and perforation phasing angle. With the use of non-damaging completion fluid, some degree of formation and perforations damages are induced during well killing and completion operations. Reduction of well productivity post completion is the main focus.
Re-perforation is mainly done when:
- The openings in the wall of the casing and the perforation tunnels are the only pathway into the formation. If these are inadequate or have been damaged by fillings of debris, dirty fluids and mud, then the fastest and most effective way is to re-establish communication to the formation is to re-perforate.
- Laminated formations require more perforations or a breakdown immediately.
- Wells that have been shut in for any significant period, even as short as a few months, can often benefit from re-perforating.
- Fracture treatments often breakdown easier and will have less pressure when re-perforated. Re-perforating the well will rarely harm the well. The main suggestions are to use a large hollow carrier gun to get maximum connection with minimum damage. Fracturing attempts following through tubing perforating have a much higher incidence of wellbore screen outs.
The report analyzes the re-perforation market by application and geography. Market share analysis, by revenue, of the top companies is also included in the report. The market share analysis of these key players is arrived at, based on key facts, annual financial information, and interviews with key opinion leaders such as CEOs, Directors, and marketing executives.
In order to present an in-depth understanding of the competitive landscape, the report on re-perforation consists of company profiles of some major participants in the market, which combines technology providers such as Baker Hughes (U.S.), Halliburton (U.S.), Aker Field-Life solutions, Archer Limited well services and others.
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