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Analysis of the influencing factors of the reservoir permeability obtained by pressure build-up method
Author(s): 
Pages: 27-29,33,114
Year: Issue:  3
Journal: Journal of Xi'an Petroleum Institute(Natural Scien

Keyword:  formation testerlogging interpretationpressure build-up methodformation permeabilityinfluencing factor;
Abstract: Obtaining formation permeability using pressure build-up method is one of estimating the formation permeability methods according to RFT logging data. In order to study the influences of some factors such as test depth, the invasion of mud filtrate, the compressibility of the fluid in formation tester, etc. on the accurate calculation of the formation permeability, the causes forming the influences are analyzed based on the basic principle of acquiring the formation permeability using the pressure build-up method, and some problems are presented which should be considered during reading logging data and logging interpretation. By analyzing, it is held that the formation tester can only reflect the permeability of the movable fluid within test range; time should lag a little in reading the pressure of logging curve; the pressure increase must be taken into account which is caused by the invasion of mud filtrate into the formation near holebore in calculating the permeability of low permeability formation.
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