Forty nine high rate oil wells were completed with gravel packs in Maxus' Intan/Widuri fields in a nine month period. Lower than expected productivity on the initial completions resulted in an extensive investigative test program conducted primarily at the field level. The test program, the procedures used and the results of these tests are reviewed. The investigations include fluid and gel compatibility with the formation, determination of the critical gravel pack slurry parameters, pressure losses across different screen types, and the outcome of various gravel placement techniques.
The primary conclusions are as follows. Slurry gel viscosity was the most critical parameter in the amount of gravel placement. Perforation washing in conjunction with underbalanced tubing conveyed perforating (TCP) gave significantly better gravel placement and productivity than only underbalanced TCP. The use of a short cleanup test following completion is beneficial in early identification of a production impairment.