Evaluation of fracturing results in deviated wellbores through on-site measurements
- Halliburton Services, Duncan, OK (USA)
- Arco Alaska Inc. (US)
- Guydon Software Services (US)
Four adjacent oil wells in the Kuparuk River oil field, with deviated angles of 6{sup 0}5', 24{sup 0}6', 27{sup 0} and 36{sup 0}7' from the vertical at the perforations, were analyzed with prefracturing tests. The total fluid volume for these tests varied from 645 to 840 bbl(103 to 134 m/sup 3/) of either clean lease oil or water-based fracturing fluid at low to intermediate rates (up to 15bbl/min(2.4m/sup 3/)). These wells were subsequently fractured with proppant-laden fluid. A series of instantaneous shut-in pressures (ISIO's) was obtained for each well. ISIP's and fracturing pressures decreased with time in two of the four wells with a relatively high friction pressure at the end of the pumping. A radially propagating fracture from a point source of pressure explains this decreasing pressure with time. The elasticity theory predicts that a fracture in a deviated, cased wellbore should intersect the wellbore at one location. Only when the deviated wellbore azimuth is near that of the fracture orientation does the fracture sweep the entire perforated zone. This observation of the fracture orientation relative to the wellbore azimuth based on the pressure analysis is enhanced further by postfracture temperature surveys. It appears that only a relatively small volume of proppant could be displaced in a deviated wellbore. The degree of deviation, however, did not appear to be a major concern in the treatment of size.
- OSTI ID:
- 5626891
- Journal Information:
- SPE (Society of Petroleum Engineers) Production Engineering; (USA), Vol. 4:3; ISSN 0885-9221
- Country of Publication:
- United States
- Language:
- English
Similar Records
Limited entry, multiple fracturing from deviated wellbores
Impacts of oriented perforating on fracture stimulation treatments: Kuparuk River field, Alaska
Related Subjects
FRACTURING FLUIDS
FLUID FLOW
OIL WELLS
BOREHOLES
DIRECTIONAL DRILLING
ELASTICITY
EVALUATION
HYDRAULIC FRACTURING
INCLINED STRATA
PRESSURE MEASUREMENT
RESERVOIR PRESSURE
TEMPERATURE MEASUREMENT
CAVITIES
COMMINUTION
DRILLING
FLUIDS
FRACTURING
GEOLOGIC STRATA
GEOLOGIC STRUCTURES
MECHANICAL PROPERTIES
TENSILE PROPERTIES
WELLS
020300* - Petroleum- Drilling & Production