Sand Consolidation Operation Strategy for Boosting Production while Performing Cost Optimization

Abstrak

Sand consolidation operation was demanded for more challenge for increasing number of operation. On contrary, cost optimization was also demanded due to more marginal reserves available. Innovation and strategy were developed to cope with both challenging objectives.

Boosting production achieved by increasing number of unit and product diversification. Increasing unit was applied on most utilized chemical. Product diversification involved careful consideration due to different chemical properties in order to ensure successful result. Cost optimization was achieved by reduction in operation duration and reduction in chemical usage. Operation duration was reduced by eliminating of coiled tubing usage. Treatment was deployed by bullheading method instead of conveyed by coiled tubing. Chemical reduction purpose was to reduce margin of penetration in order to have good enough treatment  quality.

Additional units to perform sand consolidation were deployed on August 2019. It increased job capacity from 3 to 11 jobs per month. Chemical product was diversified for other 3 different products. Aqueous based resin was applied on 14 wells. 9 wells produced successfully without sand, 2 wells produced with sand, 1 well with sand burst during clean-up and 2 wells are not producing due to productivity issue. During production time, average gas rate of 1.1 MMscfd is achieved. Alternative sovent based resin product was deployed on 1 well with gas production result of 1.6 MMscfd and without sand produced during initial clean up. Furan resin was applied also in 1 well with gas production result of 2.7 MMscfd and without sand produced during initial clean up. Meanwhile, cost optimization could only be achieved by optimizing well-recognized product A. Bullheading method was  successfully applied on 14 wells. 3 wells were already flowing with average rate 1.4 MMscfd without sand issue or tubing access issue. Daily operation effieciency was achieved up to 1.7 days. Penetration margin was reduced from 3.5 ft to 3 ft in order to achieve good-enough treatment quality. Sand consolidation performance was reviewed, resulting no sand consolidation quality reduction for 3 ft penetration treatment. 25% cost reduction from chemical was successfully achieved.

This paper shown a benchmarking of several sand consolidation chemical performance due to chemical diversification initiative. Cost optimization initiave has shown prove of controlled chemical usage reduction did not reduce sand consolidation quality. It also proves that correct parameter of bullhead treatment did not reduce treatment conveyance quality.