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Method of fracturing using ultra lightweight proppant suspensions and gaseous streams

A proppant and gaseous fluid technology, used in chemical instruments and methods, production fluids, earthwork drilling, etc., can solve problems such as being unsuitable for generating single-layer fractures, minimize conductivity loss, reduce device requirements, and enhance fluids The effect of recycling

Active Publication Date: 2014-09-17
BAKER HUGHES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In addition, conventional fracturing operations, including those in which gaseous materials are mixed into the fracturing fluid, have been found to be unsuitable for creating partially monolayer fractures

Method used

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  • Method of fracturing using ultra lightweight proppant suspensions and gaseous streams
  • Method of fracturing using ultra lightweight proppant suspensions and gaseous streams
  • Method of fracturing using ultra lightweight proppant suspensions and gaseous streams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A stable foam of 95 quality was prepared by adding a viscosifier to the mixing device 10 of the foam flow circuit 1, which circuit further included an aqueous carrier device. The tackifier is added to the mixing device during mixing. The amount of tackifier and added to the mixing device 10 is C 18 Trimethylammonium Chloride [3.5 gal / thousand (gpt)] and 50 / 50 C 18 Blend of trimethylquat ammonium chloride and sodium xylene sulfonate (10.0 gpt). Fluid is then introduced into triplex Cat pump 20 and pumped through mass flow meter 30 . Nitrogen gas 40 is forced through a mass flow meter and into a foam generator 60 . The amount of nitrogen in the froth introduced into the froth flow loop was approximately 95% by volume.

[0056]On leaving the foam generator, the foam enters 1000 feet of coiled 316SS pipe immersed in an oil bath 70 for approximately 25-30 minutes. The oil bath temperature is about 100°F. The foam then enters the capillary viscometer 80 after passing th...

Embodiment 2

[0058] A fracturing treatment is proposed for the Niobrara Chalk formation with a depth to the middle perforation of 1034 feet; bottom hole static temperature is about 73°F, bottom hole fracture pressure is about 724 psi; surface treatment pressure (maximum) is about 751 psi; and the fracture gradient is about 0.70 psi / ft. The desired result is the distribution of a partial monolayer of proppant upon fracture closure. It has been determined that the frac treatment will require approximately 10,000 pounds of ultra-light weight proppant. The ULW proppant selected was LiteProp 108, a 14 / 40 mesh thermoplastic ultra-lightweight proppant with an apparent specific gravity of approximately 1.05, a product of BJ Services Company. The evaluated liquid proppant concentration was estimated to add approximately 4 pounds of proppant per gallon of liquid (ppa). This represents the estimated concentration of proppant required to accommodate the flow rate of the pump. Additionally, the mass...

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Abstract

In a method of hydraulically fracturing a hydrocarbon-bearing subterranean formation, a proppant stage is introduced into the fracture which contains a gaseous fluid and an ultra lightweight proppant suspended in a viscosified aqueous fluid. The gaseous fluid of the proppant stage contains at least about 90 volume percent of the combination of gaseous fluid and aqueous fluid. A pad fluid may first be introduced into the formation, the pad fluid containing a gaseous fluid and, optionally, an aqueous fluid. The gaseous fluid of the pad fluid mixture typically contains at least 70 volume percent of the mixture.

Description

field of invention [0001] The present invention relates to a method of hydraulically fracturing a subterranean formation by introducing into the formation a stable foam as a proppant stage containing a gaseous fluid suspended in viscosified or gelled aqueous Ultra Light Weight (ULW) proppants in fluids. Background of the invention [0002] One conventional method of increasing the productivity of a hydrocarbon-bearing formation penetrated by a wellbore is to subject the formation to stimulation techniques such as hydraulic fracturing. In hydraulic fracturing, a liquid, gas, or two-phase fluid, commonly referred to as a fracturing fluid, is introduced into a formation. A fracturing fluid (usually water or oil based) is introduced into a wellbore drilled through the subterranean formation at a pressure and flow rate sufficient to create fractures in the subterranean formation. Proppants are introduced into the fracture to keep the fracture open. The propped fractures provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/70C09K8/80
CPCC09K2208/30C09K8/80C09K8/703Y10S507/924C09K8/86C09K8/94E21B43/267
Inventor R·S·维勒C·纽霍尔R·R·梅尔斯B·沃德B·B·比尔H·布兰农
Owner BAKER HUGHES INC
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