화학공학소재연구정보센터
Journal of Canadian Petroleum Technology, Vol.42, No.5, 53-60, 2003
A completion solution for the Paddy reservoir in northeast British Columbia: A case study
The Paddy reservoir, located near the Foothills of the Rocky Mountains in northeast British Columbia, Canada, is a fluvio-estuarine valley-filled sandstone that has moderate to high permeability. Evidence of tectonic stress has been observed during hydraulic fracture treatments in the form of excessive wellbore friction and net pressures.. Historically, attempts to fracture-stimulate these wells has been difficult due to the inability. to generate sufficient fracture width necessary for proppant placement. This paper presents a completion, solution for the Paddy reservoir in northeast British Columbia that enabled successful placement of propped fracture treatments. Pressure response of past fracture treatments were analysed to understand the cause of past failures, and to quantify, the influence of tectonically-induced stress. A recommended completion solution is presented which includes orientated perforating to reduce near-wellbore friction and a process for designing fracture treatments to enable successful placement of proppant. Field examples of the new completion technique are presented which show that near-wellbore friction was reduced by 50%, and that up to four times the amount of proppant was placed in the formation compared to previous treatments. Pressure match simulation results from the fracture treatments are also presented.