0
Research Papers: Petroleum Wells-Drilling/Production/Construction

Vertical Interference Test in Wells With Downhole Water Sink Completions

[+] Author and Article Information
Ephim Shirman

 Schlumberger, P.O. Box 82925, Baton Rouge, LA 70884

Andrew Wojtanowicz

 Louisiana State University, Baton Rouge, LA 70803

J. Energy Resour. Technol 131(3), 033103 (Sep 01, 2009) (11 pages) doi:10.1115/1.3194772 History: Received December 02, 2006; Revised April 20, 2009; Published September 01, 2009

Downhole water sink (DWS) well completions segregate production in the wellbore by producing water from the underlying aquifer and oil—from the oil zone of the reservoir. A pump drains water from the bottom completion to create a pressure drawdown that prevents water from coning up to the top, oil producing zone. Successful application of DWS technology in wells with water-coning problem requires effective isolation between the top and bottom completions of the well. Since DWS technology requires dual completion, the completion is configured for vertical interference testing. The problem is that such test involves flow of two fluids, water and oil. This paper presents a new mathematical model and analysis method for vertical interference testing using top completion (in the oil leg) for production and bottom completion (in the water leg) for observation. The model is analytical and accommodates partial penetration and permeability anisotropy. The analysis method employs a family of type-curves. Examples of possible applications of this new testing method are also shown in this paper.

FIGURES IN THIS ARTICLE
<>
Copyright © 2009 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Schematic of the completion with DWS

Grahic Jump Location
Figure 2

Equivalent completion geometry used for modeling

Grahic Jump Location
Figure 3

Pressure around partially penetrating well in an in the infinite reservoir

Grahic Jump Location
Figure 4

Reproduction of a vertical interference test from Ref. 7 with MSS model

Grahic Jump Location
Figure 5

Effect of permeability anisotropy on pressure response in monitoring well

Grahic Jump Location
Figure 6

Effect of different penetration ratios on the on the dimensionless pressure response

Grahic Jump Location
Figure 7

Effect of distance to the monitoring well on dimensionless pressure response

Grahic Jump Location
Figure 8

Correlation of dimensionless pressure response and the penetration ratio

Grahic Jump Location
Figure 9

Dimensionless pressure response for different distances from the bottom of the active perforation to the monitoring well

Grahic Jump Location
Figure 10

Dimensionless pressure response for different distances from the bottom of the active perforation to the monitoring well (hp/h<0.5, hb−hm>hp)

Grahic Jump Location
Figure 11

Type-curves for vertical and horizontal interference tests

Grahic Jump Location
Figure 12

Type-curves for vertical and horizontal interference tests in semilog coordinates

Grahic Jump Location
Figure 13

Example type-curve matching

Grahic Jump Location
Figure 14

Horner plot of the injection part of the example experiment

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In