Effect of Fracture Design Parameters on the Well Performance in a Hydraulically Fractured Shale Gas Reservoir

Abstract

This study investigates the impact of fracture design parameters from the results of sensitivity analysis in a shale gas reservoir. When a shale gas reservoir is hydraulically fractured, the fracture network systems are formed comprising primary and secondary fractures. In the case of low permeability reservoir, especially, the more complex fracture network systems is, the more the productivity is improved. In this study, a sensitivity analysis was carried out to evaluate the impact of fracture design parameters on the well performance in a hydraulically fractured shale gas reservoir using simulation model. The productivity is improved when the secondary fracture conductivity increases or spacing decreases with various conditions of reservoir. It is shown that the determination of whether to increase or decrease secondary fracture growth is required to improve the productivity of shale gas reservoir. Based on the results, a guideline for hydraulic fracturing is proposed.

Keywords

Shale gas Fracture design parameter Multistage fracturing of horizontal wells Sensitivity analysis

References

Cipolla

C.L.

Warpinski

N.R.

Mayerhofer

M.J.

Lolon

E.P.

and Vincent

M.C.

, 2010. The Relationship between fracture complexity, reservoir properties, and fracture treatment design, Journal of Society of Petroleum Engineering 25(4), 438–452.

Gilbert

J.V.

and Barree

R.D.

, 2009. Production analysis of multiply fractured horizontals wells. SPE Rocky Mountain Petroleum Technology Conference, Denver, April 14–16, 2009. Denver, Colorado, USA, pp. 1–9.

Guo

and Gao

, 2014. The significance of fracture face matrix damage to the productivity of fractured wells in shale gas reservoirs, Petroleum Science and Technology 32(2), 202–210.

LaFollette

Sookprasong

Wang

and Hughes

, 2013. Characterization of hydraulic fracture geometry in shale gas reservoirs using early production data. International Petroleum Technology Conference, Beijing, March 26–28, 2013. Beijing, China, pp. 1–12.

Novlesky

Kumar

and Merkle

, 2011. Shale gas modeling workflow: From microseismic to simulation-a Horn River case study. Canadian Unconventional Resources Conference, Alberta, November 15–17, 2011. Alberta, Canada, pp. 1–24.

Rahman

M.K.

Rahman

M.M.

and Joarder

A.H.

, 2007. Analytical production modeling for hydraulically fractured gas reservoirs, Petroleum Science and Technology 25(6), 683–704.

Rubin

, 2010. Accurate simulation of non-Darcy flow in stimulated fractured shale reservoirs. SPE Western Regional Meeting, Anaheim, May 27–29, 2010. Anaheim, California, USA, pp. 1–16.

Sahai

Jackson

and Rai

, 2012. Optimal well spacing configurations for unconventional gas reservoirs. SPE Americas Unconventional Resources Conference, Pittsburgh, June 5–7, 2012. Pittsburgh, Pennsylvania, USA, pp. 1–21.

Swami

, 2012. Shale gas reservoir modeling: From nanopores to laboratory. SPE Annual Technical Conference and Exhibition, San Antonio, Texas, October 8–10, 2012. Texas, USA, pp. 1–12.