Improved Frac and Pack Job Design and Execution in Baram Field—A Case History

摘要

Baram Delta Field is a mature hydrocarbon-producing field in east Malaysia. The reservoirs are predominantly friable andunconsolidated. Downhole sand-exclusion systems are required to help ensure prolonged well productivity. Historically, most wells were completed with internal gravel packs (IGP) and high-rate water packs (HRWP) with good success rates. However, there were concerns of inconsistent final completion skins that could result in wells ot producing to full potential. In an effort to improve and optimize sand-control techniques, the frac-pack technique was introduced to achieve not only sand exclusion but also provide additional reservoir stimulation. This paper describes the transition of an idea from sand control only to optimizing production through reservoir stimulation. A reservoir selection process for applicable frac- pack treatments is also reviewed. Because this technique was relatively new to this field, fracture design an alysis was thoroughly reviewed before the actual application in an effort to ensure maximum benefit from the treatment. This paper is intended to systematically translate and interpret the field data acquired, with the aim of improving the quality of the job, the fluid design, and pumping diagnostic stage to achieve TSO (tip screenout) fracs. It is expected that variability in skin after frac-pack treatments can be minimized and the best productivity can be achieved by having an optimized fluid design along with standardized pumping diagnostic and TSO design technique. The well performance from these frac-pack wells was also evaluated to quantify the benefit of these improved techniques.