Simulation of hydrocarbon source rock maturation by hydrous pyrolysis

Conference · Fri Mar 01 04:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:7170612

Peigui, Yin; Boese, S W; Surdam, R C ^[1]; Miknis, F P ^[2]

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1. Univ. of Wyoming, Laramie (United States)
2. Western Research Inst., Laramie, WY (United States)

Hydrous pyrolysis experiments were performed on samples of immature brown coal from the Gippsland basin (southeastern Australia) for 72 hours at temperatures ranging from 270 to 350C. The produced liquid pyrolysate ( oil'), gases, and aqueous organic acid anions were quantified, and the geochemical properties of the oil' were determined. The solid residue from experiments was studied, using conventional pyrolysis, and was analyzed by nuclear magnetic resonance (NMR). The genetic potential of the source rocks, as determined by hydrous pyrolysis, was substantially higher than that determined by conventional pyrolysis. The oil' derived from hydrous pyrolysis is compositionally similar to the natural oil produced from the Gippsland basin. The maturation stage of the solid residue determined by production index (PI), the temperature corresponding to the peak of kerogen pyrolysis (T{sub max}), and NMR patterns can be correlated with depth trends observed in a series of natural brown coal samples from the Gippsland basin (from near surface to a depth of 9,000 ft). The major acid anions (e.g., acetate and propionate) generated during hydrous pyrolysis also are present within the produced waters in the Gippsland basin. The experimental results demonstrate that hydrous pyrolysis experiments simulate well the natural maturation of these hydrocarbon source rocks.

• OSTI ID: 7170612
• Report Number(s): CONF-910403--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Journal Volume: 75:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000* -- Petroleum-- Properties & Composition
AUSTRALASIA
AUSTRALIA
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHEMISTRY
COAL
DECOMPOSITION
DEVELOPED COUNTRIES
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOCHEMISTRY
GEOLOGIC DEPOSITS
MAGNETIC RESONANCE
MATERIALS
MATURATION
MINERAL RESOURCES
NUCLEAR MAGNETIC RESONANCE
PETROLEUM
PETROLEUM DEPOSITS
PYROLYSIS
RESONANCE
RESOURCES
SIMULATION
SOURCE ROCKS
THERMOCHEMICAL PROCESSES