IP Library Granted Patent US 8,171,992
Granted Patent B2
US 8,171,992 · App. 13/243,650 · Granted May 8, 2012

Method of fracturing a subterranean formation at optimized and pre-determined conditions

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Quick Facts
Patent No.
US 8,171,992
App. No.
13/243,650
Granted
May 8, 2012
Kind
B2
Abstract

Prior to a hydraulic fracturing treatment, ΔSG PS for a desired propped fracture length, D PST , may be estimated wherein ΔSG PS =SG prop −SG fluid (SG prop being the specific gravity of the proppant and SG fluid being the specific gravity of the transport fluid) in accordance with Equation (I): ΔSG PS =( A )×(1/ q i )×( D PST ) B ×(1/ C TRANS )×(1/ d 2 prop )×(μ fluid )  (I) wherein: A is the multiplier and B is the exponent from the Power Law equation of velocity of the transport slurry vs. distance for the fracture geometry; q i is the injection rate per foot of injection height, bpm/ft; C TRANS is the transport coefficient; d prop is the median proppant diameter, in mm.; and μ fluid is the apparent viscosity of the transport fluid, in cP.

Claims (16)

1. A method of hydraulic fracturing a subterranean formation by introducing a transport fluid containing a proppant into a fracture of defined generalized geometry within the formation, the method comprising:

(a) determining the difference in specific gravity between the proppant and the transport fluid, ΔSG PS , as defined by SG prop −SG fluid , for the desired propped fracture length, D PST , in accordance with Equation (I):

ΔSG PS =( A )×(1 /q i )×( D PST ) B ×(1 /C TRANS )×(1 /d 2 prop )×(μ fluid )  (I)

wherein:

SG prop is the specific gravity of the proppant;

SG fluid is the specific gravity of the transport fluid;

A is the multiplier and B is the exponent from the Power Law equation of velocity of the transport slurry vs. distance for the fracture geometry;

q i is the injection rate per foot of injection height, bpm/ft;

C TRANS is the transport coefficient;

d prop is the median proppant diameter, in mm.; and

μ fluid is the apparent viscosity of the transport fluid, in cP;

(b) introducing the transport fluid into the formation; and

(c) subjecting the formation to hydraulic fracturing and creating fractures in the formation.

2. The method of claim 1 , wherein the proppant is an ultra lightweight (ULW) proppant.

3. The method of claim 1 , wherein the transport fluid is slickwater.

4. The method of claim 1 , wherein the fracture geometry has a 1:1 to 5:1 aspect ratio.

Assignments (7)
CHANGE OF NAME Recorded Feb 16, 2022
From: BAKER HUGHES, A GE COMPANY, LLC
To: BAKER HUGHES HOLDINGS LLC
Reel/Frame 059142/0921 →
CHANGE OF NAME Recorded Feb 16, 2018
From: BAKER HUGHES INCORPORATED
To: BAKER HUGHES, A GE COMPANY, LLC
Reel/Frame 045349/0522 →
ENTITY CONVERSION Recorded Oct 4, 2017
From: BAKER HUGHES INCORPORATED
To: BAKER HUGHES, A GE COMPANY, LLC
Reel/Frame 044127/0001 →
CHANGE OF NAME Recorded Dec 19, 2011
From: BSA ACQUISITION LLC
To: BJ SERVICES COMPANY LLC
Reel/Frame 027409/0921 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 19, 2011
From: BJ SERVICES COMPANY LLC
To: BAKER HUGHES INCORPORATED
Reel/Frame 027409/0483 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 19, 2011
From: BRANNON, HAROLD DEAN
To: BJ SERVICES COMPANY
Reel/Frame 027409/0290 →
MERGER Recorded Dec 19, 2011
From: BJ SERVICES COMPANY
To: BSA ACQUISITION LLC
Reel/Frame 027409/0359 →