Fracturing fluids for delayed flow back operations

Details Fracturing fluids for delayed flow back operations Fracturing fluids for delayed flow back operations

2007-08-14

2007-08-14

Tucker, Philip C. (Department: 1712)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S201000, C507S209000, C507S273000, C507S920000, C507S922000

Reexamination Certificate

active

10270807

ABSTRACT:
It has been discovered that certain fracturing fluid compositions can be used to fracture a subterranean formation and be permitted to stay within the formation for a relatively extended period of time, for example 28 days or more, before being flowed back or produced. At least two embodiments are envisioned, a bacteria-containing formulation and an anti-bacterial formulation. Both systems would be expected to prevent the potential of the fluid to oil wet the formulation (water block condition) by keeping the formation water wet through the use of water wetting surfactants or solvents. Additionally, both formulations would control reservoir crude souring (H2S generation by in situ sulfate-reducing bacteria), reservoir plugging (via slime biopolymers generated by in situ microbes, inorganic scale deposition like calcium carbonate or barium sulfate, and clay fines migration).

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British Search Report for Application No. GB 0226321.8, May 1, 2003.

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