Enhanced Recovery of Crude Oil from Shale Formations by Gas Injection in Zipper-fractured Horizontal Wells

T. Wan; J. J. Sheng

doi:10.1080/10916466.2015.1079536

Enhanced Recovery of Crude Oil from Shale Formations by Gas Injection in Zipper-fractured Horizontal Wells

T. Wan, J. J. Sheng

Petroleum Engineering

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The zipper-frac technique is implemented in two adjacent horizontal wells to maximize the exposure of shale rocks. The hydraulic fractures are propagated in a manner in which they are connected with natural fracture network to improve the fracture complexity. In this study, the authors exploit the advantage of stimulated fracture complexity to access more of the hydrocarbons trapped in very low permeability of shale matrix. The recovery process efficiencies by cyclic CO₂ injection and CO₂ flooding in zipper-fractured horizontal wells are compared. The role of diffusion recovery mechanism in recovering oil from fractured shales will be discussed.

Original language	English
Pages (from-to)	1605-1610
Number of pages	6
Journal	Petroleum Science and Technology
Volume	33
Issue number	17-18
DOIs	https://doi.org/10.1080/10916466.2015.1079536
State	Published - Sep 17 2015

Keywords

IOR
Zipper-fractured
flooding efficiency
shale oil

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10.1080/10916466.2015.1079536

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title = "Enhanced Recovery of Crude Oil from Shale Formations by Gas Injection in Zipper-fractured Horizontal Wells",

abstract = "The zipper-frac technique is implemented in two adjacent horizontal wells to maximize the exposure of shale rocks. The hydraulic fractures are propagated in a manner in which they are connected with natural fracture network to improve the fracture complexity. In this study, the authors exploit the advantage of stimulated fracture complexity to access more of the hydrocarbons trapped in very low permeability of shale matrix. The recovery process efficiencies by cyclic CO2 injection and CO2 flooding in zipper-fractured horizontal wells are compared. The role of diffusion recovery mechanism in recovering oil from fractured shales will be discussed.",

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AU - Wan, T.

AU - Sheng, J. J.

PY - 2015/9/17

Y1 - 2015/9/17

N2 - The zipper-frac technique is implemented in two adjacent horizontal wells to maximize the exposure of shale rocks. The hydraulic fractures are propagated in a manner in which they are connected with natural fracture network to improve the fracture complexity. In this study, the authors exploit the advantage of stimulated fracture complexity to access more of the hydrocarbons trapped in very low permeability of shale matrix. The recovery process efficiencies by cyclic CO2 injection and CO2 flooding in zipper-fractured horizontal wells are compared. The role of diffusion recovery mechanism in recovering oil from fractured shales will be discussed.

AB - The zipper-frac technique is implemented in two adjacent horizontal wells to maximize the exposure of shale rocks. The hydraulic fractures are propagated in a manner in which they are connected with natural fracture network to improve the fracture complexity. In this study, the authors exploit the advantage of stimulated fracture complexity to access more of the hydrocarbons trapped in very low permeability of shale matrix. The recovery process efficiencies by cyclic CO2 injection and CO2 flooding in zipper-fractured horizontal wells are compared. The role of diffusion recovery mechanism in recovering oil from fractured shales will be discussed.

KW - IOR

KW - Zipper-fractured

KW - flooding efficiency

KW - shale oil

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JO - Petroleum Science and Technology

JF - Petroleum Science and Technology

IS - 17-18

ER -

Enhanced Recovery of Crude Oil from Shale Formations by Gas Injection in Zipper-fractured Horizontal Wells

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Keywords

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