Method and device for determining clastic reservoir grade

Abstract

The invention discloses a clastic rock reservoir grade determination method and device, which belong to the field of reservoir exploration. The method comprises steps: the lithology of volcanic rocksin a target region is recognized; when clastic rock exists in the target region, based on the volcanic lava thicknesses at multiple positions in the target region, a seismic attribute map and a seismic reflection profile, the areas with multiple volcanic vents in the target region are determined; based on the areas with multiple volcanic vents and the volcanic facies in different depths of the areas with the multiple volcanic vents, the eruption period of each of the multiple volcanic vents is determined; based on the eruption period of each of the multiple volcanic vents, a clastic rock areain the target region is determined; and based on the clastic rock area in the target region, the clastic rock reservoir grade in the target region is determined. In the embodiment of the invention, the volcanic lava area of the target region is firstly determined, the clastic rock area is then determined, the clastic rock reservoir grade is further determined, and graded evaluation on the clasticrock reservoir is realized.

Description

technical field [0001] The invention relates to the field of reservoir exploration, in particular to a method and device for determining the grade of clastic rock reservoirs. Background technique [0002] With the continuous development of oil reservoir exploration, people's demand for oil and gas continues to increase, and the exploration of conventional volcanic rock reservoirs has been difficult to meet today's demand for oil and gas reserves. Therefore, it is very important to explore and develop new oil reservoirs, among which , the exploration of clastic rock reservoirs formed under the influence of volcanic events has become a new breakthrough point for increasing oil and gas reserves. [0003] At present, the research on the evaluation methods of volcanic rock reservoirs focuses on the research and evaluation of volcanic lava reservoirs, while ignoring the research and evaluation of clastic rock reservoirs formed under the influence of volcanic events. The method is...

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Problems solved by technology

[0003] At present, the research on the evaluation methods of volcanic rock reservoirs focuses on the research and evaluation of volcanic lava reservoirs, while ignoring the research and evaluation of clastic rock reservoirs formed under the influence of volcanic events. The method is difficult to adapt to the needs of exploration and development of clastic reservoirs formed under the influence of volcanic events. Therefore, there is an urgent need for a method that can be used to determine the grade of clastic reservoirs formed under the influence of volcanic events

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