Recent Achievements With the Formation Tester in Canada
- K.M. Banks (Schlumberger of Canada)
- Document ID
- Petroleum Society of Canada
- Journal of Canadian Petroleum Technology
- Publication Date
- June 1963
- Document Type
- Journal Paper
- 84 - 94
- 1963. Petroleum Society of Canada
- 1.10 Drilling Equipment, 5.2.1 Phase Behavior and PVT Measurements, 5.2 Reservoir Fluid Dynamics, 4.1.5 Processing Equipment, 1.6 Drilling Operations, 5.3.2 Multiphase Flow, 5.5.2 Core Analysis, 6.6.3 Social Responsibility and Development, 4.6 Natural Gas, 2.1.1 Perforating, 5.6.7 Formation test analysis (e.g., wireline, LWD), 2.1.3 Sand/Solids Control, 1.6.10 Coring, Fishing, 1.8 Formation Damage, 4.1.2 Separation and Treating
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Since its introduction in Canada, the wire-line Formation Tester has provento be valuable in evaluating prospective oil- and gas-bearing formations. Inthis paper, firstly, the procedures presently used in interpreting FormationTester results will be reviewed. Then, a method will be discussed fordetermining formation permeability from Formation Tester recovery and log data.For both of these, illustrative field examples are given.
In addition, an empirical technique is proposed for estimating gasproduction rates in gas wells. Field examples are presented which illustratethe procedures involved and show some typical results that have beenobtained.
The wire-line Formation Tester is used extensively throughout Western Canadafor the evaluation of prospective oil- and gas-bearing formations. Since itsintroduction in Canada, approximately 1,300 successful tests have been made.The primary purpose of these tests is to determine the fluid content andpressure of the formation. The information derived has allowed refinements ofthe existing interpretation techniques.
Some present techniques for interpreting formation fluid content are coveredin this paper. In addition, methods are discussed whereby Formation Tester dataare used to determine formation permeability and to estimate gas productionrates.
Interpretation of Recovery
Field experience with the wire-line Formation Tester run on logging cable,and comparison of recoveries obtained with production data, have furnished thebasis for several methods of determining formation fluid content. Althoughthese interpretation techniques may vary somewhat from area to area, dependingupon local conditions, they are basically the same. Fundamentally, allwire-line Formation Tester interpretations depend upon the amounts and thenature of gas, oil, and water that are recovered. Recovery of free gas and/oroil usually indicates a good probability that the tested zone will producehydrocarbons upon completion.
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