Title

Study and Application of a Gelled Foam Treatment Technology for Water Shutoff in Naturally Fractured Reservoir

Abstract

The paper demonstrates a water shutoff technology in naturally fractured reservoir, which is based on simultaneous placement of a polymer gel and foam in fracture, where foam is stabilized by delayed formed gel.

Lab studies were undertaken to develop a gelled foam formulation. A series of fracture blocking tests were performed to evaluate water-blocking capacity of gelled foam in fractured models. The optimized gelled foam has stronger water-blocking capability and greater residual resistant factor than regular gel. The influence of residual oil in fracture to gelled foam is also studied; a pre-treating fluid is used to enhance blockage effectiveness.

The field trial design and execution of gelled foam treatment on an oil well in fractured reservoir are described. The results show that water cut decreases from 90% to around 40%, the oil production rate has been drastically increasing for more than 18 months, indicating longer effective lifetime of gelled foam treatment when compared with other water shutoff trials in this kind of reservoirs.

Meeting Name

Canadian International Petroleum Conference 2008, CIPC 2008 (2008: Jun. 17-19, Calgary, Alberta, Canada)

Department(s)

Geosciences and Geological and Petroleum Engineering

Keywords and Phrases

Fracture; Gasoline; Gelation; Oil wells; Petroleum reservoir engineering; Petroleum reservoirs, Effective lifetime; Foam formulation; Fractured reservoir; Naturally fractured reservoirs; Oil-production rates; Study and applications; Treatment technologies; Water shut off, Water treatment

International Standard Book Number (ISBN)

978-161399115-2

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 Canadian International Petroleum Conference 2008, All rights reserved.

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