PILOT OF ROD-SHAPED PROPPANT APPLICATION TO ENHANCE AND SUSTAIN PRODUCTION FROM FRACTURING IN A TIGHT FORMATION IN BETA FIELD

摘要

Alpha formation in Beta field is a shallow marine type deposition that is relies on hydraulic fracturing stimulation for economic production. The process of unlocking the oil potential from hydraulic fracturing has been started since 1990. However, the sustainability of production after fracturing is challenged to achieve due to some damaging area near the wellbore. In order to achieve the sustainability in production, the Rod-shaped type of proppant is used as tail-in proppant to cover and maintain conductivity near the wellbore. The Rod-shaped proppant can also act as proppant flow-back agent especially for alpha formation that has shallow depth (1400 ftTVD). One well of two candidates has been executed flawlessly using Rod-shaped proppant as tail in. At the same time, the production profile trends are compared to wells that not utilize Rod-shape proppant. Significant impact is seen in terms of production gain from wells that was fractured utilizing Rod-shaped proppant compared to wells that are not. The trend of production decline is also showed that the wells that is stimulated using rod-shaped proppant having better decline. Sanding issue is not seen as well from rod-shaped proppant well compare to wells that not use rod-shaped. This paper aims to provide new insight and perspective on how rod-shaped can improve well performance and sustainability. INTRODUCTION Chevron Pacific Indonesia or CPI operates in Riau producing from Central Sumatra Basin. With permeability in the range of 15-40 md and porosity of 20-25%, Alpha formation in Beta Field is-typical tight formation that needs to be fractured to optimize the production. Hydraulic fracturing is selected to be a technique to increase the production. However, due to the fact that alpha formation in beta field is quite shallow (~1600ft TVD depth), the sand production after fracturing is quite challenging. Besides the return sand from production, the damaged area near the well bore can also be an issue in sustaining the production. A better approach of having a good fracturing job with a better conductivity in the wellbore area is mandatory to deal with alpha formation in beta field. Some ceramic-typed proppant had been used with different mesh size from 20/40 to 12/18. The last pilot project was using Rod-shaped proppant as tail-in of 12/18 proppant.