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Title: Reasons for production decline in the diatomite, Belridge oil field: a rock mechanics view

Abstract

This work summarized research conducted on diatomite cores from the Belridge oil field in Kern County. The study was undertaken to try to explain the rapid decline in oil production in diatomite wells. Characterization of the rock showed that the rock was composed principally of amorphous opaline silica diatoms with only a trace of crystoballite quartz or chert quartz. Physical properties tests showed the diatomite to be of low strength and plastic. Finally, it was established that long-term creep of diatomite into a propped fracture proceeds at a rate of approximately 6 x 10-5 in./day, a phenomenon which may be a primary cause of rapid production declines. The testing program also revealed a matrix stength for the formation of calculated 1325 PSI, a value to consider when depleting the reservoir. This also may help to explain the phase transformation of opal ct at calculated 2000 to 2500 ft depth.

Authors:
Publication Date:
OSTI Identifier:
6161447
Alternate Identifier(s):
OSTI ID: 6161447
Report Number(s):
CONF-820316-
Journal ID: CODEN: SPESD
Resource Type:
Conference
Journal Name:
SPE Repr. Ser.; (United States)
Additional Journal Information:
Conference: California regional SPE meeting, San Francisco, CA, USA, 24 Mar 1982
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; OIL WELLS; FORMATION DAMAGE; PRODUCTION; ROCK MECHANICS; CALIFORNIA; DIATOMS; DRILL CORES; FRACTURED RESERVOIRS; GEOLOGY; PERMEABILITY; PETROLEUM; PHYSICAL PROPERTIES; PLUGGING; PROPPING AGENTS; SILICA; TESTING; ALGAE; CHALCOGENIDES; ENERGY SOURCES; FEDERAL REGION IX; FOSSIL FUELS; FUELS; MECHANICS; MINERALS; NORTH AMERICA; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PLANTS; SILICON COMPOUNDS; SILICON OXIDES; USA; WELLS 020300* -- Petroleum-- Drilling & Production

Citation Formats

Strickland, F.G. Reasons for production decline in the diatomite, Belridge oil field: a rock mechanics view. United States: N. p., 1982. Web.
Strickland, F.G. Reasons for production decline in the diatomite, Belridge oil field: a rock mechanics view. United States.
Strickland, F.G. Fri . "Reasons for production decline in the diatomite, Belridge oil field: a rock mechanics view". United States.
@article{osti_6161447,
title = {Reasons for production decline in the diatomite, Belridge oil field: a rock mechanics view},
author = {Strickland, F.G.},
abstractNote = {This work summarized research conducted on diatomite cores from the Belridge oil field in Kern County. The study was undertaken to try to explain the rapid decline in oil production in diatomite wells. Characterization of the rock showed that the rock was composed principally of amorphous opaline silica diatoms with only a trace of crystoballite quartz or chert quartz. Physical properties tests showed the diatomite to be of low strength and plastic. Finally, it was established that long-term creep of diatomite into a propped fracture proceeds at a rate of approximately 6 x 10-5 in./day, a phenomenon which may be a primary cause of rapid production declines. The testing program also revealed a matrix stength for the formation of calculated 1325 PSI, a value to consider when depleting the reservoir. This also may help to explain the phase transformation of opal ct at calculated 2000 to 2500 ft depth.},
doi = {},
journal = {SPE Repr. Ser.; (United States)},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}

Conference:
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