Use of Transient Data to Calculate Absolute Permeability and Average Fluid Saturations

Kamal, Medhat M.; Pan, Yan

doi:10.2118/113903-ms

Cited by 5 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, Kamal and Pan (2008) formulated a practical methodology to estimate reservoir absolute permeability and average fl uid saturations from twophase well test data which is used in this work for complementary purposes. To apply the methodology, fi rst estimate oil and water effective permeabilities using Equations 7 and 8, respectively.…”

Section: Theorymentioning

confidence: 99%

Application of TDS Technique to Multiphase Flow

Escobar

Montealegre-M.

2008

CT&F Cienc. Tecnol. Futuro

View full text Add to dashboard Cite

Although, the radial difussivitity equation has been solved for a single-fluid phase flow, in some cases more than one phase flows from the reservoir to the well; therefore, the single-phase solution has been previously extended to multiphase flow without losing a significant degree of accuracy. Practically, there exist two ways of dealing with multiphase flow: The Perrine method, Perrine (1956) which basically replaces the single-phase compressibility by the multiphase compressibility so that each fluid is analyzed separately using the concept of mobility. The other one is the use of pseudofunctions which have been found to be the best option. The TDS technique has been widely applied to a variety of scenarios. It has been even tested to successfully work on condensate systems with the use of pseudofunctions, Jokhio, Tiab and Escobar (2002). However, equations for estimation of phase permeability, skin factor and drainage area has not neither presented nor tested. In this article, we present new versions of a set of equations of the TDS technique to be applied to multiphase flow following the Perrine method along with a previously presented way of estimation of the absolute relative permeability. We successfully applied the proposed equations to synthetic and field examples.

show abstract

Section: Theorymentioning

confidence: 99%

Application of TDS Technique to Multiphase Flow

Escobar

Montealegre-M.

2008

CT&F Cienc. Tecnol. Futuro

View full text Add to dashboard Cite

show abstract

A Computational Approach to Determine Average Reservoir Pressure in a Coalbed Methane (CBM) Well Flowing Under Dominant Matrix Shrinkage Effect

Upadhyay

Laik

2017

Transp Porous Med

View full text Add to dashboard Cite

Permeability Increase in Bowen Basin Coal as a Result of Matrix Shrinkage during Primary Depletion

Scott

Mazumder

Jiang

2012

SPE Asia Pacific Oil and Gas Conference and Exhibition

View full text Add to dashboard Cite

Matrix shrinkage in coal-seam gas reservoirs as a result of production, and the resultant impact on absolute permeability, is a current area of intense interest. A number of publications have documented the existence of this phenomenon. The exponential growth behaviour of coal seam permeability with reservoir pressure depletion has been observed previously at the Fairway wells in the San Juan basin. More recently, an exponential trend has also been confirmed for a group of 10 wells in a region northeast of Fairway. An increase in the absolute permeability of coal seam is a result of matrix shrinkage caused by gas desorption, which becomes a dominant factor on cleat permeability over the effective horizontal stress change during production. Bottom hole pressure recovery during shut-in periods can provide valuable data concerning the impact of coal seam gas production on reservoir permeability. Arrow Energy's historical production data, from the MGP field in the Bowen Basin, contains over 60 instances of data on pressure recovery during shut-in. These Time lapse Build-up periods have been analysed using the pseudo-pressure method (Kamal and Six, 1991) in an effort to gain an understanding of the extent and effect of this phenomenon within the company's existing assets. The method is based on a pseudo pressure function that uses the adsorption isotherm and the relative permeability relations of the reservoir. The infinite acting radial flow regime was identified and the gradient was recorded on a semi log plot of the pseudo pressure versus dimensionless time. Results from these tests show multi fold increase in absolute permeability as a function of the estimated reservoir pressure.

show abstract

Use of Transient Data to Calculate Absolute Permeability and Average Fluid Saturations

Cited by 5 publications

References 9 publications

Application of TDS Technique to Multiphase Flow

Application of TDS Technique to Multiphase Flow

A Computational Approach to Determine Average Reservoir Pressure in a Coalbed Methane (CBM) Well Flowing Under Dominant Matrix Shrinkage Effect

Permeability Increase in Bowen Basin Coal as a Result of Matrix Shrinkage during Primary Depletion

Contact Info

Product

Resources

About