Method of preventing in-depth formation damage during injection

Details Method of preventing in-depth formation damage during injection Method of preventing in-depth formation damage during injection

1992-03-25

1993-10-12

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166278, 166281, 1663051, E21B 4302, E21B 4320

Patent

active

052516970

ABSTRACT:
In-depth formation damage is prevented during water injection by adding to the water non-compressible solids of sufficient size and concentration to form an external filter cake within the injection well. Preferably, the non-compressible solids are either diatomite, perlite, saw dust, or calcium carbonate, and the concentration of non-compressible solids is from 0.001 to 5 wt%. When no longer needed, the external filter cake is removed from the injection well by using an acid wash or back-flowing the well.

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patent: 4579668 (1986-04-01), Messenger
T. W. Lancey, K. Kammula, "Prediction of Filtration Efficiencies of Water Injection Systems," Pac Coast Oil Show & Conf. (Bakersfield, CA, Proc. '86 86.11.04-06).
D. D. Sparlin, "Advances in Well Completion Technology," J. Petrol. Technol. vol. 34, No. 1, pp. 17-18, Jan. 1982.

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