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Theoretical Study on the Reorientation of Refracturing

Author: DiaoWangQing
Tutor: LuXiangGuo；ZhaoJiLiang
School: Northeast University of Petroleum
Course: Petroleum and Natural Gas
Keywords: refracturing fissure extension mode stress field well interference induced stress
CLC: TE357
Type: Master's thesis
Year: 2011
Downloads: 182
Quote: 0
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Abstract


Hydraulic fracturing is a very important measure for the low permeability oil and gas reservoirs, but the precious hydraulic fractures may fail during the production for some reasons. So, hydraulic refracturing technology becomes a significant topic for old producers. All of these, the refracturing reorientation is fairly difficult and most important in refracturing. The refracture orientation depends on the stress field in the vertically-fractured well. Especially the horizontal principal stresses orientation in the vertically-fractured well determines the azimuth of refracture creation and refracture propagation. The paper study systematically the stress characteristics of vertically - fractured well and the main factors affecting the change of stress value and the stress orientation. Using the theory of elasticity me chanics and fluid-solid coupling and poroelastic, we have set up the mathematical model of induced stress of refracturing well to quantitatively analyze and simulate stress filed before refracturing for vertically– fractured well.

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CLC: > Industrial Technology > Oil and gas industry > Oil and gas development and mining > Production Engineering > Enhanced oil recovery and maintain reservoir pressure (secondary and tertiary oil recovery )
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