Enhanced Gas Recovery by CO2 Sequestration vs. Refracturing Treatment

Fig. 1—Configuration of Wells UT-1 and UT-2 and hydraulic fractures. Base case (a) without refracturing and (b) with refracturing.

In this paper, two different EGR methods are investigated and systematically compared in terms of efficiency. The first method is a refracturing treatment in order to revive a shale-gas well that has failed to achieve economic gas-production rates. The second proposed method is CO2 injection for both storage/sequestration and EGR. Discussions and definitions of each of these methods, as well as governing equations, are provided in the complete paper.

Introduction

In this paper, two different EGR methods are investigated and systematically compared in terms of efficiency. The first method is a refracturing treatment in order to revive a shale-gas well that has failed to achieve economic gas-production rates. The second proposed method is CO2 injection for both storage/sequestration and EGR. Discussions and definitions of each of these methods, as well as governing equations, are provided in the complete paper.

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 172083, “Enhanced Gas Recovery by Use of CO2 Sequestration vs. Refracturing Treatment in Unconventional Shale-Gas Reservoirs,” by Mohammad O. Eshkalak, SPE, Emad W. Al-Shalabi, SPE, Alireza Sanaei, SPE, Umut Aybar, SPE, and Kamy Sepehrnoori, SPE, The University of Texas at Austin, prepared for the 2014 Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 10–13 November. The paper has not been peer reviewed.
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Enhanced Gas Recovery by CO2 Sequestration vs. Refracturing Treatment

01 July 2015

Volume: 67 | Issue: 7

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