Realization Method of Irregular Oil-Water Interface Modeling

A technology of oil-water interface and implementation method, which is applied in 3D modeling, image data processing, special data processing applications, etc., can solve the problems of mismatching interpretation conclusions, inaccurate models, and water in oil, etc., to achieve promotion and economy Significant benefits and simple operation
CN104252551BActive Publication Date: 2017-05-03CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2017-05-03

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Abstract

The invention provides an irregular oil-water interface modeling implementation method. The method comprises the following steps: preliminarily simulating the space distribution of an oil-water interface of an oil-containing area; determining the fluctuation range of the oil-water interface according to the deepest and shallowest oil-water interface depths meeting during single-well drilling, and constraining the result of the last step by taking the oil-water interface fluctuation range as constrained control; determining a water-top interface of a pure water area according to the top surface structure of water sand; merging the oil-water interface of the oil-containing area and the interface of the pure water area to finally obtain an irregular oil-water interface of the whole area. According to the irregular oil-water interface modeling implementation method, the maximum coincidence between the oil-water interface of a well point and actual drilling is realized, the phenomenon that water exists in oil and oil exists in water appears on a single well when a unified oil-water interface is adopted is avoided; in addition, the irregular oil-water interface modeling implementation method is clear in technical concept and simple to operate, breaks through a method of a previous single oil-water interface and solves the problem that the irregular oil-water interface is not easily realized in a model.
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Description

technical field

[0001] The invention relates to the technical field of three-dimensional geological modeling of petroleum development geology, in particular to a method for realizing modeling of irregular oil-water interface. Background technique

[0002] 3D geological modeling has now become a key link in the fine reservoir description of oil reservoirs in oilfield development. The determination of the oil-water interface is also an important content in the modeling process.

[0003] The oil-water interface refers to the contact surface between oil and water. The oil-water interface is not strictly a horizontal plane, and generally shows three occurrences: horizontal, irregular, and inclined. The formation of irregular oil-water contact is mainly due to the fact that oil and gas have to overcome capillary pressure in the process of oil and gas migration and accumulation. Due to the heterogeneity of microscopic pore structure of reservoirs at the same depth, the capillary p...

Claims

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