Analysis of production tests of hydraulically fractured wells in a tight solution gas-drive reservoir

Conference · Wed Sep 01 00:00:00 EDT 1982 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5466263

Verbeek, C M.J.

A simulation study has been carried out to investigate how accurate existing techniques are to evaluate tests of non-ideal hydraulically fractured wells in tight solution gas drive reservoirs. In the reservoir under investigation some frac-jobs have been carried out in stages. Wells, deviating up to 45 degrees, can intersect several parallel vertical fractures. In that case a correct analysis of tests is almost impossible. In practice conclusive results can only be obtained if a prefrac test is available or when a postfrac test formation radial flow is evidently reached. Existing superposition methods were tested for constant pressure, constant rate and multirate cases to compare their applicabilities. In case radial flow superposition is applied in the time scale and if linear flow is significant results of multirate cases can show too optimistic kh values. Published pseudopressure techniques to find formation kh values for solution gas drive reservoirs are improved by using average fluid properties instead of those at wellbore conditions. To accurately define fracture and formation characteristics a pseudo time factor was needed to correct for drastic changes in viscosity and total compressibility.

• Research Organization: Shell Internationale Petroleum Mij
• OSTI ID: 5466263
• Report Number(s): CONF-820927-
• Journal Information: Soc. Pet. Eng. AIME, Pap.; (United States), Vol. SPE11084; Conference: 57. AIME Society of Petroleum Engineers annual technical conference and exhibition, New Orleans, LA, USA, 26 Sep 1982
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OIL WELLS
GAS INJECTION
HYDRAULIC FRACTURING
COMPUTERIZED SIMULATION
DATA ANALYSIS
ENHANCED RECOVERY
FLUID MECHANICS
FRACTURE PROPERTIES
HYDRAULIC CONDUCTIVITY
HYDRAULIC FRACTURES
PERFORMANCE TESTING
PRODUCTION
RESERVOIR PRESSURE
RESERVOIR ROCK
TIME DEPENDENCE
COMMINUTION
FAILURES
FLUID INJECTION
FRACTURES
FRACTURING
MECHANICAL PROPERTIES
MECHANICS
RECOVERY
SIMULATION
TESTING
WELLS
020300* - Petroleum- Drilling & Production