Pressure transient analysis of reservoirs with linear or internal circular boundaries

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6826893

Sageev, A

In this work, a practical pressure transient analysis method is presented for a drawdown test in a well near an internal circular boundary. Both no-flow and constant pressure boundaries are considered. The problem is mathematically posed and solved using Green's Function theory and the Laplace Transformation. Both the Laplace solutions and the analytical solutions are presented. Linear boundaries are viewed as circles with infinite radii and act as a known limiting case for finite radii internal boundaries. The size of an internal circular boundary and the distance to it can be estimated using generalized type curves. Using a new method developed here, the distance to a linear boundary can be determined by semilog type curve matching without using the usual double straight line technique. In developed systems containing compressible subregions, interference testing can provide estimates of the sizes of these subregions. However, detecting no-flow subregions with interference testing is not practical. Also presented are type curves for interference between a well flowing at a constant rate and one at constant pressure. The superposition method which can be used for assembling circular subregions intersected by linear faults is discussed as well. Finally, a new generalized semilog type curve is presented that can be used for analyzing pressure transient data for both the linear and circular boundary cases.

• OSTI ID: 6826893
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CIRCULAR CONFIGURATION
CONFIGURATION
DRAWDOWN
FLUID FLOW
PRESSURE GRADIENTS
WELLS