Conventional gravel pack provided robust sand control but with high skin and poor productivity for the last 3 decades. Recently, frac pack was revived with improvements in perforations, net pressure, tip screen out, and downhole equipment and was implemented in phase 1 development of D field in early 2020 to achieve high productivity and sand control. Initial phase of frac pack application saw challenges in designs and operations. Valuable lessons have been captured and implemented in the next phases in B field in late 2020 and in D field in 2022. Operation optimization resulted in simplification of the procedures, reduction of fluid volume injected, reducing in rig time and cost while maintaining the quality of frac pack. Real time decision which differs from initial plan had to be made during implementation to produce the best outcome.

Optimizations in procedures and chemical selections brought higher productivity while achieving effective sand control. Some frac pack were done without minifrac. Further optimization in the frac pack has been achieved by applying screenless frac pack with resin coated proppant for one well in D field and resulted in increase in well productivity and well completion cost reduction. Highly efficient operations were achieved through procedural improvement. Detrimental chemical additive in frac fluid has been identified and eliminated in the second phase wells. These efforts have contributed to achieve or exceed the production targets while providing robust sand and fine control as an effective downhole sand control completion.

This paper examines the challenges, offers improvement to make frac pack a viable solution to achieve field production objectives, and evaluates production performances across the phases.

You can access this article if you purchase or spend a download.