Successful Performance of a New Domestic Sand Consolidation Product in Mahakam

Abstrak

Chemical sand consolidation (SCON) as an in situ sand control method by injecting epoxy resin to re-bind and strengthen formation sand grain has been a common approach to tackle sand production issue for more than decade. Recently, a new type of SCON made by the local is being develop in Mahakam fields which offers high performance and cost effective. The newly local sand consolidation was assessed in three different wells to validate the effectiveness in both consolidation strength and regained permeability of the new product. This study will present the successful history based on performance eva ation in the treated wells. The performance evaluation of the local sand consolidation is determined through lab testing as a pre-job preparation and post treatment result including top of sediment (TOS) increment and actual recovery. Several lab testing are performed to examined the resistance of resin fluid to pressure and temperature, that consist of curing time test, compressive strength test and permeability regained test. While the assessment of TOS increment is to ensure none of formation grain are bypass the resin consolidation into the wellbore after treatment. It is concluded that the local sand consolidation is field-proven by succeeded to increase formation strength over than 1000 psi of compressive strength while keep maintaining permeability near wellbore regained up to 90%. It was found only minimum of TOS increment at maximum rate 0.26 m/day. By using local resin-based sand consolidation, all treated wells able to produce sand free with average gas rate 2 million standard cubic feet per day (MMscfd) and recovered remaining reserve in shallow section.