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Rate Transient Analysis in Shale Gas Reservoirs with Transient Linear Behavior

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Rate Transient Analysis in Shale Gas Reservoirs with Transient Linear Behavior
RATE TRANSIENT ANALYSIS IN SHALE GAS RESERVOIRS WITH TRANSIENT LINEAR BEHAVIOR

A Dissertation by RASHEED OLUSEHUN BELLO

Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY

May 2009

Major Subject: Petroleum Engineering

RATE TRANSIENT ANALYSIS IN SHALE GAS RESERVOIRS WITH TRANSIENT LINEAR BEHAVIOR

A Dissertation by RASHEED OLUSEHUN BELLO

Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY

Approved by: Chair of Committee, Committee Members, Robert A. Wattenbarger Goong Chen Christine Ehlig-Economides Bryan Maggard Stephen Holditch

Head of Department,

May 2009

Major Subject: Petroleum Engineering

iii

ABSTRACT

Rate Transient Analysis in Shale Gas Reservoirs with Transient Linear Behavior. (May 2009) Rasheed Olusehun Bello, B.Sc., University of Lagos, Nigeria; M.Sc., University of Saskatchewan, Canada Chair of Advisory Committee: Dr. Robert Wattenbarger

Many hydraulically fractured shale gas horizontal wells in the Barnett shale have been observed to exhibit transient linear behavior. This transient linear behavior is characterized by a one-half slope on a log-log plot of rate against time. This transient linear flow regime is believed to be caused by transient drainage of low permeability matrix blocks into adjoining fractures. This transient flow regime is the only flow regime available for analysis in many wells. The hydraulically fractured shale gas reservoir system was described in this work by a linear dual porosity model. This consisted of a bounded rectangular reservoir with slab matrix blocks draining into adjoining fractures and subsequently to a horizontal well in the centre. The horizontal well fully penetrates the rectangular reservoir. Convergence skin is incorporated into the linear model to account for the presence


References: LIST OF FIGURES FIGURE 1.1 United States Natural Gas Production, 1990-2020 ...................................
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