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Research Papers

Performance Optimization of Abrasive Fluid Jet for Completion and Stimulation of Oil and Gas Wells

[+] Author and Article Information
Anuj Gupta

 Texas A&M University at Qatar, 213 E Texas A&M Engineering Building, Education City, P.O. Box 23874, Doha, Qataranuj.gupta@qatar.tamu.edu

J. Energy Resour. Technol 134(2), 021001 (Mar 19, 2012) (6 pages) doi:10.1115/1.4005775 History: Received June 16, 2010; Revised December 26, 2011; Published March 16, 2012; Online March 19, 2012

This paper provides an overview of the development and optimization of abrasive-slurry-jet methods for completion and stimulation applications. Abrasive particles added to the fluid dramatically reduced the system pressure requirements. The paper discusses the technical capabilities of cutting through various materials and formations and also discusses improvements and proven applications. Abrasive fluid-jet systems are capable of cutting through rocks of all types, and with greater location control that is not susceptible to the geologically induced deviations encountered with mechanical methods. Abrasive fluid-jets drill rock through the erosion induced by very small particles which individually remove only small fragments but are in such numbers that the drilling rate is at or above that of conventional tools. The particles are powered by the velocity of the supporting fluid, generated in turn by pumps on the surface. The cutting occurs ahead of the nozzle body allowing the nozzle assembly to be fed in the tunnel to create drain-holes. Fluid-jet methods have the potential of improving completion and stimulation efficiency in heterogeneous formations such as fractured and/or vuggy carbonate reservoirs. Application for completion, stimulation and, even, well/platform abandonment has been successful.

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Copyright © 2012 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Schematic of abrasive water jetting process

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Figure 2

Effect of available pressure drop across the jet on depth of cut (after Hashish [11])

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Figure 3

Schematic of the experimental apparatus

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Figure 4

Sand suspension in xanthan (1% w/w) (1 week)

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Figure 5

Sand suspension in xanthan (0.50% w/w) (2 h)

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Figure 6

Sand suspension in MF-55 (5% w/w) (5 min)

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Figure 7

Sand suspension in MF-55 (3% w/w) (60 s)

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Figure 8

Relation between jet-length and polymer concentration

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Figure 9

Holes drilled with submerged-jets. Sandstone penetration = 1.88 in., granite penetration = 1.00 in., 1/8 in. steel plate penetration = Full

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Figure 10

Underwater jet coherence lengths

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