Study of hydrocarbon-shale interaction. Final report

Technical Report ·

OSTI ID:5372530

Schettler, Jr, P D

The major conclusion reached by the contracted work is that, although fracturing is necessary in order to obtain Devonian shale production, the nature of the shale-hydrocarbon interaction remains a major contributing (but often neglected) factor in determining the degree of success of the well. Although natural fractures serve as conduits to the well bore, these fractures cannot be the reservoir. The kinetics of gas release by a sample, though small, is large enough to replace the volume of gas in a fracture many times during the lifetime of a well. The range of kinetic constants (or degasibilities) varies by a factor of greater than 100 X, depending on well location and sample depth. This means that only 1% of the induced or natural fracture extent will be necessary to obtain a good well in shell with favorable degasibilities as compared with a well drilled into rock with poor kinetic parameters. Alternatively, two wells accessing fracture systems with equivalent geometric properties may differ in productivity by a factor of 100 or more depending on the degasibility of the fractured rock. Appendix I summarizes all data collected during the contract period. A copy of this table has been sent to Petroleum Information (on 8/25/80) for inclusion in the EGSP data base. Details of the measurement method and the conclusions reached are detailed in the several quarterly reports (ORO-5197-1 to ORO-5197-16), as well as the EGSP symposia. Appendix II contains major titles of papers included in these reports.

• Research Organization: Juniata Coll., Huntingdon, PA (USA)
• DOE Contract Number: AS21-76ET12127
• OSTI ID: 5372530
• Report Number(s): DOE/ET/12127-T1; ON: DE82017160
• Country of Publication: United States
• Language: English

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03 NATURAL GAS
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ALKANES
BITUMINOUS MATERIALS
BLACK SHALES
CARBONACEOUS MATERIALS
CHATTANOOGA FORMATION
COMMINUTION
DEVONIAN PERIOD
ELEMENTS
ENERGY SOURCES
ENHANCED RECOVERY
FLUIDS
FOSSIL FUELS
FRACTURING
FUEL GAS
FUELS
GAS ANALYSIS
GAS FUELS
GAS YIELDS
GASES
GEOLOGIC AGES
GEOLOGIC FORMATIONS
HELIUM
HYDROCARBONS
MATERIALS
METHANE
NATURAL GAS
NITROGEN
NONMETALS
OIL SHALES
ORGANIC COMPOUNDS
PALEOZOIC ERA
RARE GASES
RECOVERY
YIELDS