This paper presents the results from frac-packing of wells in shallow, unconsolidated reservoirs onshore Trinidad. The objectives of this type of treatment were to improve the initial production rate and consequently the net present value of the wells, as well as mitigate the productivity impairment associated with conventionally gravel packed wells.

Most of Trinidad’s onshore crude oil production is considered to be mature in that the oil reserves are still being produced by primary means with tertiary recovery methods accounting for roughly one third of total production. With declining oil production, there exists the need for higher production rates; frac packing is considered to be one suitable intervention to achieve this goal. In addition, lower skin from frac pack completions in comparison to gravel packs and the ability of the frac pack to maintain this low skin during the life of the well accrues recoverable reserves.

Treatment results show an increase in the average production rate of 200% compared to the pre-fracture rates. There is also a projected increase in recoverable reserves of 8-35% per well due an extended producing life prior to the eventual abandonment rate. The data presented in this paper provides encouraging results for future frac packing on land.

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