A sealing evaluation method for porous sandstone fault zone
An evaluation method and fault zone technology, which is applied in the field of research on the mechanism of faults controlling reservoirs, to achieve a simple and reliable evaluation method
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[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0030] The present invention firstly introduces the mechanism of lateral sealing of oil and gas by the fault zone.
[0031] From the perspective of oil and gas accumulation, the migration of fluid during the fault active period is fast, and it can be considered to be instantaneous on the time scale of geological history; while the time of the fault activity-interval period and the fault quiescence period is much longer. It is longer than the fault active period, so for hydrocarbon accumulation, the fault active period-intermittent period and the fault static period have more important significance for hydrocarbon migration and accumulation and preservation. The main driving force of the fluid during the fault activity-intermittent period and the fault static period is buoyancy. The fault zone and the reservoirs on both sides of the fault are considere...
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