Method for quantitatively determining brittle-ductile critical condition of gypsum rock-carbonatite
A technology of carbonate rocks and critical conditions, applied in the field of petroleum geology research, can solve the problems of few temperature and pressure conditions, less research on the role of accumulation, less oil and gas accumulation, etc.
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[0040] The gypsum-carbonate reservoir in the Ordos Basin is an important rock type of the Ordovician gas reservoir. Since the deposition of the Ordovician in the basin, the temperature and pressure have shown an overall trend of increasing first and then decreasing. Combined with the rapid deep burial of the Ordos Basin, it began in the Permian and continued to the Triassic, Jurassic, and Cretaceous, and the basin entered a continuous uplift stage from the Cretaceous. Therefore, it is determined that during the process of oil and gas accumulation, the temperature and pressure conditions of the overall deep burial and continuous uplift of the basin affect the whole process of oil and gas accumulation, and the parameters correspond to A (10MPa, 40°C), B (20MPa, , 90°C), D (40MPa, 115°C), E (50MPa, 135°C), F (60MPa, 155°C), G (70MPa, 170°C) and H (80MPa, 185°C) eight positions.
[0041] At the same time, the Ordovician Majiagou Formation of the Lower Paleozoic in the Ordos Basin ...
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