Fracture-vug type reservoir identification method
A technology of reservoir identification and fracture-cavity type, applied in the field of oil and gas exploration and development, can solve problems such as poor effect of fracture-cavity type reservoirs, and achieve the effects of reducing exploration and development costs, improving oil and gas exploration and development benefits, and improving drilling success rate.
Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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[0004] The purpose of the present invention is to provide a fracture-cavity reservoir identification method to solve the problem of poor effect of conventional methods in identifying fracture-cavity reservoirs by identifying short reflections with "short-axis bright spots" on the post-stack seismic section
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[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0034] Method example:
[0035] According to the principle of "from large to small, from simple to complex", this embodiment first describes the possible development areas of fractured-vuggy reservoirs in the whole area, and then gradually finely carves the spatial distribution and plane distribution of fractured-vuggy reservoirs.
[0036] Such as figure 1 As shown, the fracture-vuggy reservoir identification method in this embodiment includes the following steps:
[0037] Step 1. Obtain the post-stack seismic data of the target work area, and extract the three-dimensional instantaneous frequency data volume of the post-stack seismic data of the target work area;
[0038] Among them, the instantaneous frequency means that the single-component sei...
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The invention provides a fractured-vuggy reservoir identification method, and belongs to the technical field of oil-gas exploration and development. The method comprises the following steps: extracting a three-dimensional instantaneous frequency data volume of post-stack seismic data of a target work area; according to the instantaneous frequency characteristics of the drilled fractured-vuggy reservoir in the target work area, determining a frequency range capable of representing the fractured-vuggy reservoir; the three-dimensional instantaneous frequency data volume is scanned at least in the main measuring line direction and the tie line direction in combination with the frequency range, and all abnormal geologic bodies in the target work area are obtained; 360-degree omnibearing scanning is carried out on the corresponding abnormal geologic body by randomly selecting one point in each abnormal geologic body in the target work area, scattered abnormal geologic bodies in the target work area are removed, and screened abnormal geologic bodies in the target work area are obtained; and in combination with the screened abnormal geologic body of the target work area, completing the identification of the fracture-cavity reservoir in the target work area. According to the method, the continental fracture-cavity reservoir can be effectively identified, and the risk of exploration and development is reduced.
Description
technical field [0001] The invention relates to a fracture-cavity reservoir identification method, which belongs to the technical field of oil and gas exploration and development. Background technique [0002] Fracture-vuggy reservoirs generally refer to reservoirs with fractures and caves as oil and gas storage spaces. Most of these reservoirs are carbonate rocks, and their storage spaces and seepage channels are mainly composed of fractures and dissolved pores and caves connected with them. This type of reservoirs is usually a high-permeability reservoir, which is mainly affected by the original lithology, structure, etc. The combined effect of karst and karst. Fracture-vuggy reservoirs have undergone multi-stage tectonic movements and strong weathering, denudation, and leaching. The types of reservoir space are diverse, and the scale and shape of fractures and caves are extremely irregular and randomly distributed. [0003] The current conventional fracture-vuggy reserv...
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IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 张泽均樊振现卓色强王德波张玉体彭国桃李凤娇梅冰
Owner CHINA PETROLEUM & CHEM CORP