Fluid loss control

Details Fluid loss control Fluid loss control

1995-04-06

1999-07-27

Wu, Shean C.

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

507212, 507269, 507922, 507924, 166280, 166283, 166308, E21B 4326, E21B 43267, C09K 300

Patent

active

059290021

ABSTRACT:
The invention, in one embodiment, relates to a fluid loss control additive or composition comprising a granular starch composition and fine particulate mica, in specified proportions. The invention further comprises a fracturing fluid containing a starch composition and mica, in a specified ratio. In yet a third embodiment, the invention comprises a method of fracturing a subterranean formation penetrated by a borehole, comprising injecting into the borehole and into contact with the formation, at a rate and pressure sufficient to fracture the formation, a fracturing fluid containing starch and mica, in specified ratios, and in an amount sufficient to provide fluid loss control. In an additional embodiment, a fluid loss additive is used in a low viscosity preliminary sacrificial conditioning stage solution which will condition high permeability formations to provide a substantially uniform, low permeability fracture face leading to longer fracture lengths and more predictable design and execution of fracturing treatments in high permeability formations.

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"Optimized frac pad and gel improve well productivity", by Fritcher, Byrd, and Stegent, Oil and Gas Journal (Mar. 20, 1995).
"Dynamic Fluid Loss in Hydraulic Fracturing under Realistic Shear Conditions in High Permeability Rocks", by Navarrete, Cawiezel, and Constien, SPE 28529, Paper presented at SPE 69th Annual Technical Conference and Exhibition, New Orleans, La., Sep. 25-28, 1994.
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