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

T. Wan, J. J. Sheng

Research output: Contribution to journalArticlepeer-review

8 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 languageEnglish
Pages (from-to)1605-1610
Number of pages6
JournalPetroleum Science and Technology
Volume33
Issue number17-18
DOIs
StatePublished - Sep 17 2015

Keywords

  • IOR
  • Zipper-fractured
  • flooding efficiency
  • shale oil

Fingerprint Dive into the research topics of 'Enhanced Recovery of Crude Oil from Shale Formations by Gas Injection in Zipper-fractured Horizontal Wells'. Together they form a unique fingerprint.

Cite this