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Hydraulic fracturing of poorly conso...

Gil, Ivan.

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Hydraulic fracturing of poorly consolidated formations: Considerations on rock properties and failure mechanisms.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Hydraulic fracturing of poorly consolidated formations: Considerations on rock properties and failure mechanisms./
Author:	Gil, Ivan.
Description:	376 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-11, Section: B, page: 6026.
Contained By:	Dissertation Abstracts International65-11B.
Subject:	Engineering, Petroleum. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3152841
ISBN:	9780496131761

Hydraulic fracturing of poorly consolidated formations: Considerations on rock properties and failure mechanisms.
Gil, Ivan.

Hydraulic fracturing of poorly consolidated formations: Considerations on rock properties and failure mechanisms. - 376 p.

Source: Dissertation Abstracts International, Volume: 65-11, Section: B, page: 6026.

Thesis (Ph.D.)--The University of Oklahoma, 2005.

This dissertation addresses the issue of hydraulic fracturing stimulation of poorly consolidated formations. First, a complete review about the mechanical properties of such formations was performed. Typical ranges of properties such as Young's modulus, Poisson's ratio, and uniaxial compression strength (UCS) were identified. In addition, the characteristic shape of the stress-strain curve was also recognized. Given their friable nature, weakly consolidated sands exhibit very low values of Young's modulus, and UCS. They could be located in the lower end of the sandstones trend in the Deere and Miller rock classification. Subsequently, a study on the reliability of the measurements of the rock mechanical properties for unconsolidated rocks was conducted. The effects of coring, freezing and testing were studied. It was concluded that coring-induced stress relaxation may cause permanent alterations of the rock mechanical behavior. However, the data about freezing-induced alteration of cores were deemed inconclusive and more research on this issue was recommended.

ISBN: 9780496131761Subjects--Topical Terms:

1018448
Engineering, Petroleum.

Hydraulic fracturing of poorly consolidated formations: Considerations on rock properties and failure mechanisms.
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100 1 $a Gil, Ivan. $3 1674846
245 1 0 $a Hydraulic fracturing of poorly consolidated formations: Considerations on rock properties and failure mechanisms.
300 $a 376 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-11, Section: B, page: 6026.
500 $a Adviser: Jean-Claude Roegiers.
502 $a Thesis (Ph.D.)--The University of Oklahoma, 2005.
520 $a This dissertation addresses the issue of hydraulic fracturing stimulation of poorly consolidated formations. First, a complete review about the mechanical properties of such formations was performed. Typical ranges of properties such as Young's modulus, Poisson's ratio, and uniaxial compression strength (UCS) were identified. In addition, the characteristic shape of the stress-strain curve was also recognized. Given their friable nature, weakly consolidated sands exhibit very low values of Young's modulus, and UCS. They could be located in the lower end of the sandstones trend in the Deere and Miller rock classification. Subsequently, a study on the reliability of the measurements of the rock mechanical properties for unconsolidated rocks was conducted. The effects of coring, freezing and testing were studied. It was concluded that coring-induced stress relaxation may cause permanent alterations of the rock mechanical behavior. However, the data about freezing-induced alteration of cores were deemed inconclusive and more research on this issue was recommended.
520 $a Finally, a discrete element model was built and calibrated in order to reproduce the mechanical and hydraulic responses of a selected unconsolidated sandstone. The hydraulic fracturing process was simulated and the relative importance of different failure mechanisms was evaluated. A remarkable finding by exercising such a model was that in the case of the Antler Sandstone (and possibly in more unconsolidated formations), shear failure seems to be more important than tensile failure during the hydraulic fracturing process. This conclusion is a clear contradiction to what has been traditionally accepted in the oil and gas industry.
590 $a School code: 0169.
650 4 $a Engineering, Petroleum. $3 1018448
690 $a 0765
710 2 $a The University of Oklahoma. $3 1021915
773 0 $t Dissertation Abstracts International $g 65-11B.
790 1 0 $a Roegiers, Jean-Claude, $e advisor
790 $a 0169
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3152841