Well test analysis for vertically-fractured wells

Conference · Thu Jan 01 04:00:00 EST 1970 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5001167

Raghavan, R; Ramey, Jr, H J; Cady, G V

Russell and Truitt presented the transient pressure behavior of a vertically fractured well in a closed, square reservoir in 1964. They analyzed pressure buildup behavior and found that the straightline slope on a Horner-type buildup plot required significant correction as the fracture length increased. Also, they recommended a Muskat-type semi-log plot for estimation of static formation pressure. In view of the fact that over 500,000 wells have been hydraulically-fractured, it is likely that the Muskat-type plot should be used far more widely for estimation of static pressure than is actually the case. But many important points require further study. The Russell and Truitt dimensionless pressure-dimensionless time data were used to generate several hundred pressure buildup plots. Results were computer plotted such that an extreme variety of types of buildup plots (Horner, Muskat, Miller-Dyes-Hutchinson, and log-log type curves) could be studied for a wide range in length of a producing period and fracture lengths. As a results, it is possible to specify the data which will be straightened by a Muskat plot, and to estimate permeability and diffusivity from a Muskat plot. (20 refs.)

• Research Organization: Stanford Univ.
• OSTI ID: 5001167
• Report Number(s): CONF-701012-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE-3013
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
FRACTURE PROPERTIES
FRACTURED RESERVOIRS
MECHANICAL PROPERTIES
MECHANICS
NATURAL GAS WELLS
OIL WELLS
PERMEABILITY
PRESSURE MEASUREMENT
RESERVOIR PRESSURE
RESERVOIR ROCK
ROCK MECHANICS
ROCKS
SEDIMENTARY ROCKS
WELLS