|
SYSTEMATIC DESIGN AND ANALYSIS OF STEP RATE TESTS TO
<br /> 8 DETERMINE FORMATION PARTING PRESSURE SPE 16798
<br /> t = injection time, hours 4. Earlougher, R. C., Jr.: Advances in Well Test
<br /> Analysis, Monograph Series Volume 5, Society of
<br /> At = SRT time step size or incremental time during Petroleum Engineers, Dallas (1977).
<br /> the injection period, hours
<br /> 5. Hagoort, J., Weatherhill, B. D., and Settari,
<br /> W = cumulative injection, STB ("standard" m3) A.,: "Modeling tha Propagation of Waterflood-
<br /> Induced Hydraulic Fractures," Soc. Pet. Eng. J.
<br /> x = fracture half-Length, ft (m) (Aug. 1980) 293-303.
<br /> N = viscosity, cp (Pa•s) 6. Staggs, H. M., Jr.: "Injection Well Skin
<br /> Effects: Plus or Minus?" Paper No. 851-41-B
<br /> = formation porosity, fraction presented at the API Mid-Continent District
<br /> Meeting, Oklahoma City, Oklahoma, March 29-31,
<br /> Subscripts 1967.
<br /> D = dimensionless 7. Aronofsky, J. S. and Jenkins, R.: "A SimpLi-
<br /> fied Analysis of Unsteady Radial Cas Flow,"
<br /> d = drainage Trans., AIME, Vol. 201.
<br /> e = external boundary S. Odeh, A. S. and Jones, L. G.: "Pressure Draw-
<br /> down Analysis, Variable-Rate Case," J. Pet.
<br /> i = initial Tech. (Aug. 1965) 960-964.
<br /> j = index 9. Agarwal, R. G.: "A New Method to Account for
<br /> Producing Time Effects When Drawdown Type
<br /> n = index Curves are Used to Analyze Pressure Buildup and
<br /> Other :est Data," paper SPE 9289 presented at
<br /> w = wellbore the 55th Annual Technical Conference and Exhi-
<br /> bition, Dallas, Texas, Sept. 21-24, 1980.
<br /> wf = flowing conditions
<br /> 10. Agarwal, Ram G., Al-Hussainy, Rafi, and Ramey,
<br /> ACKNOWLEDGEMENTS H. J., Jr.: "An Investigation of Wellbore
<br /> Storage and Skin Effect in Unsteady Liquid
<br /> The authors thank Amoco Production Company for Flow: I. Analytical Treatment," Soc. Pet. Eng.
<br /> permission to prepare and publish this paper. The J. (Sept. 1970) 279-290; Trans., AIME, 249.
<br /> helpful comments provided by Ian Palmer and Hussien
<br /> Khattab during the preparation of this paper are 11. Ramey, H. J., Jr., Kumar A., and Gulati, M. S.:
<br /> also acknowledged. "Gas Well Test Analysis Under Water-Drive Con-
<br /> ditions, AGA, Arlington, VA (1973).
<br /> REFERENCES
<br /> 12. Vongvuthipornchai, S. and Raghavan, R.: "A
<br /> 1. Nolte, K. C.: "Fracture Design Considerations Note on the Duration of the Transitional Period
<br /> Based on Pressure Analysis," paper SPE 10911 of Responses Influenced by Wellbore Storage and
<br /> presented at the 1982 SPE Cotton Valley Sympo- Skin," Paper SPE 15273, 1986.
<br /> sium, Tyler, TX, May 20, 1982.
<br /> 13. Cinco-Ley, H. and Samaniego, V. F.: "Transient
<br /> 2. Felsenthal, M.: "Step-Rate Tests Determine Pressure Analysis for Fractured Wells," J. Pet.
<br /> Safe Injection Pressures in Floods," Oil and Tech. (Sept. 1981) 1749-1766.
<br /> Gas J. (Oct. 1974) 49-54.
<br /> 3. Bennett, C. 0. and Clark, T. J.: "Design and
<br /> Analysis of a Nitrogen Step-Rate Test, Anschutz
<br /> Ranch East Nitrogen Injection Project," paper
<br /> SPE 14456 presented at the 60th Annual Tech-
<br /> nical Conference and Exhibition, Las Vegas, NV,
<br /> Sept. 22-25, 1985.
<br /> 498
<br />
|