THE INFLUENCE OF PRESSURE ON PETROLEUM GENERATION AND MATURATION AS SUGGESTED BY AQUEOUS PYROLYSIS

被引:128
作者
PRICE, LC [1 ]
WENGER, LM [1 ]
机构
[1] EXXON PROD RES CO,HOUSTON,TX 77252
关键词
PRESSURE; HYDROCARBON; GENERATION; MATURATION; DESTRUCTION; AQUEOUS-PYROLYSIS;
D O I
10.1016/0146-6380(92)90033-T
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Because fluid pressures are transient in sedimentary basins over geologic time, the effect of increasing fluid pressure on organic-matter metamorphism is difficult to determine, and conflicting opinions exist concerning its influence. Properly-performed aqueous-pyrolysis experiments can closely simulate hydrocarbon generation and maturation in nature, and thus offer an excellent way to study the influence of pressure. Such experiments, carried out on the Retort Phosphatic Shale Member of the Lower Permian Phosphoria Formation (type II-S organic matter) at different constant temperatures, demonstrated that increasing pressure significantly retards all aspects of organic matter metamorphism, including hydrocarbon generation, maturation and thermal destruction. This conclusion results from detailed quantitative and qualitative analyses of all products from hydrocarbon generation, from the C1 to C4 hydrocarbon gases to the asphaltenes, and also from analyses of the reacted rocks. We have documented that our aqueous-pyrolysis experiments closely simulated natural hydrocarbon generation and maturation. Thus the data taken as a function of pressure have relevance to the influence of normal and abnormal fluid pressures as related to: 1) depths and temperatures of mainstage hydrocarbon generation; 2) the thermal destruction of deposits of gas or light oil, or their preservation to unexpectedly high maturation ranks; and 3) the persistence of measurable to moderate concentrations of C-15 + hydrocarbons in fine-grained rocks even to ultra-high maturation ranks.
引用
收藏
页码:141 / 159
页数:19
相关论文
共 47 条
[1]   THE KINETICS OF STERANE BIOLOGICAL MARKER RELEASE AND DEGRADATION PROCESSES DURING THE HYDROUS PYROLYSIS OF VITRINITE KEROGEN [J].
ABBOTT, GD ;
WANG, GY ;
EGLINTON, TI ;
HOME, AK ;
PETCH, GS .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1990, 54 (09) :2451-2461
[2]  
[Anonymous], [No title captured]
[3]  
BOSTICK NH, 1970, THESIS STANFORD U
[4]   MATHEMATICAL-MODEL OF OIL GENERATION, DEGRADATION, AND EXPULSION [J].
BRAUN, RL ;
BURNHAM, AK .
ENERGY & FUELS, 1990, 4 (02) :132-146
[5]  
Brooks J, 1971, SPOROPOLLENIN P INT, P351
[6]  
CECIL BC, 1977, AAPG BULL, V61, P775
[7]  
CHUNG M, 1978, FUEL, V57, P734
[8]  
CONNAN J, 1991, ADV ORG GEOCHEM, P14
[9]   SHORT-TERM BIOMARKER VARIABILITY IN THE MONTEREY FORMATION, SANTA MARIA BASIN [J].
CURIALE, JA ;
ODERMATT, JR .
ORGANIC GEOCHEMISTRY, 1989, 14 (01) :1-13
[10]   KINETICS OF HEXANE PYROLYSIS AT VERY HIGH-PRESSURES .3. APPLICATION TO GEOCHEMICAL MODELING [J].
DOMINE, F ;
ENGUEHARD, F .
ORGANIC GEOCHEMISTRY, 1992, 18 (01) :41-49