...Jeffrey A. Joseph; Leonard F. Koederitz This paper presents short-time interpretation methods for radial-spherical (or radial-hemispherical) flow in homogeneous and isotropic reservoirs inclusive of wellbore storage, wellbore phase redistribution, and damage skin effects. New dimensionless groups...

...A. S. Odeh Scaling factors for the proper application and interpretation of field-determined skin effect and pressure buildup values for use in simulators are derived. Reservoir engineering calculations for the actual well are based on a continuous physical system and the total effective formation...

... of continuously changing rates was used to generate an exact solution for pressure buildup following constant-pressure flow. The method is general. Storage and skin effects were incorporated into the theory, and both bounded and unbounded reservoirs were considered. Buildup solutions were graphed using...

... boundary and constant-pressure outer boundary. The results were used to derive a new expression for the stabilization time for power-law flow in porous media. Wellbore storage and skin effects always distort the transient pressure behavior of wells in petroleum reservoirs. It is important to investigate...

... vertical pulse testing observation well boundary fluid flow Upstream Oil & Gas skin effect well pair pressure response storage Drillstem Testing sand-face flow rate wellbore storage application pulse testing drillstem/well testing source well reservoir porous media reciprocity...

... approximation time check Upstream Oil & Gas dimensionless pressure drop wellbore straight line permeability flow period skin effect expression proper straight line equation Vertical Permeability From Limited Entry Flow Tests in Thick Formations ABSTRACT R. RAGHAVAN K. K. CLARK MEMBERS SPE-AIME...

.... This phenomenon can be attributed to the large diffusivity (k/@Peg ) at these elevated pressures. EVALUATION OF SKIN EFFECT Many authors have recognized that the flow behavior associated with partially open producing intervals can be treated in the same manner as a fully open formation with a zone of altered...

... storage and various skin effects such as those due to perforations, partial penetration, non-Darcy flow, or well stimulation effects. Recently, Agarwal et al. presented a fundamental study of the importance of wellbore storage with a skin effect to short-time transient flow. This paper further extends...

... ofwellbore storage with a skin effect to short-timetransient flow. Results indicate that properinterpretations of short-time well-test data can bemade under favorable circumstances. Upon starting a test, well pressures appearcontrolled by wellbore storage entirely, and datacannot be interpreted to yield...

...Robert A. Wattenbarger; H.J. Ramey, Jr. An investigation of the effect of wellbore storage and skin effect on transient flow was conducted using a finite-difference solution to the basic partial differential equation. The concept of skin partial differential equation. The concept of skin effect...

... where both layers contribute equally to production. Theoretical build-up curves from such reservoirs are presented, and the influence of a skin effect and flow into casing and tubing are also evaluated. The build-up curves are predicted to have, first, the familiar logarithmic straight-line section...