skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Theoretical and experimental analyses of hydraulic fracturing and some reservoir response to the stimulation

Abstract

Newly developed numerical models have been applied to analyze some aspects of fracture propagation near well bonded material interfaces to determine if these interfaces can inhibit propagation. Results from these calculations indicate that, for fractures propagating from a lower modulus material toward an interface with a higher modulus material, the stress intensity factor at the tip near the interface decreases significantly as the tip approaches the interface. However, upon penetration of the interfaces into the higher modulus material, the stress intensity factor is seen to increase abruptly and arrive at a higher value than in the lower modulus material. Small scale laboratory experiments are being performed to study the growth of hydraulically driven cracks in the vicinity of unbonded interfaces in rocks. Blocks of the materials being studied are held adjacent to one another under a static load. A hydraulically driven crack is initiated in one of the blocks. It is found that for blocks of the same material that penetration of the crack into the adjacent block is controlled by the normal stress across the interface and the finish of the interface surfaces. Experiments are performed to measure the frictional properties of the interfaces to better understand the mechanismmore » of crack growth across the interface. Well pressure test data from a MHF stimulated well in the Piceance Basin was analyzed. Analysis of that data indicated that the length of the fracture in the productive rock was of the order of the lens size. Additionally, the analysis showed that the fracture had a finite conductivity or there was fluid damage to the fracture faces, but it was impossible to uniquely determine if either mechanism was dominant.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
California Univ., Livermore (USA). Lawrence Livermore Lab.
OSTI Identifier:
6215416
Report Number(s):
UCRL-82578; CONF-790805-4
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: DOE symposium on enhanced oil and gas recovery and improved drillings technology, Tulsa, OK, USA, 22 Aug 1979
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; HYDRAULIC FRACTURING; NATURAL GAS WELLS; FRACTURES; ORIENTATION; WELL STIMULATION; COMMINUTION; FAILURES; FRACTURING; WELLS; 030900* - Natural Gas- Artificial Stimulation, Plowshare- (-1989)

Citation Formats

Hanson, M E, Anderson, G D, Shaffer, R J, Thorson, L D, and Montan, D N. Theoretical and experimental analyses of hydraulic fracturing and some reservoir response to the stimulation. United States: N. p., 1979. Web.
Hanson, M E, Anderson, G D, Shaffer, R J, Thorson, L D, & Montan, D N. Theoretical and experimental analyses of hydraulic fracturing and some reservoir response to the stimulation. United States.
Hanson, M E, Anderson, G D, Shaffer, R J, Thorson, L D, and Montan, D N. Tue . "Theoretical and experimental analyses of hydraulic fracturing and some reservoir response to the stimulation". United States.
@article{osti_6215416,
title = {Theoretical and experimental analyses of hydraulic fracturing and some reservoir response to the stimulation},
author = {Hanson, M E and Anderson, G D and Shaffer, R J and Thorson, L D and Montan, D N},
abstractNote = {Newly developed numerical models have been applied to analyze some aspects of fracture propagation near well bonded material interfaces to determine if these interfaces can inhibit propagation. Results from these calculations indicate that, for fractures propagating from a lower modulus material toward an interface with a higher modulus material, the stress intensity factor at the tip near the interface decreases significantly as the tip approaches the interface. However, upon penetration of the interfaces into the higher modulus material, the stress intensity factor is seen to increase abruptly and arrive at a higher value than in the lower modulus material. Small scale laboratory experiments are being performed to study the growth of hydraulically driven cracks in the vicinity of unbonded interfaces in rocks. Blocks of the materials being studied are held adjacent to one another under a static load. A hydraulically driven crack is initiated in one of the blocks. It is found that for blocks of the same material that penetration of the crack into the adjacent block is controlled by the normal stress across the interface and the finish of the interface surfaces. Experiments are performed to measure the frictional properties of the interfaces to better understand the mechanism of crack growth across the interface. Well pressure test data from a MHF stimulated well in the Piceance Basin was analyzed. Analysis of that data indicated that the length of the fracture in the productive rock was of the order of the lens size. Additionally, the analysis showed that the fracture had a finite conductivity or there was fluid damage to the fracture faces, but it was impossible to uniquely determine if either mechanism was dominant.},
doi = {},
url = {https://www.osti.gov/biblio/6215416}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {5}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: