Method and device for identifying shale oil deposit effective reservoir

Abstract

The invention provides a method and a device for identifying a shale oil deposit effective reservoir. The method comprises the following steps: collecting logging data and core data of an interest interval; determining a content of organic carbon of shale of the interest interval according to the logging data and the core data; determining a rock brittleness index of the shale of the interest interval according to the logging data and the core data; determining a formation pressure coefficient of the shale of the interest interval according to the logging data and the core data; determining weighted values corresponding to the content of the organic carbon, the rock brittleness index and the formation pressure coefficient according to oil well data and oil deposit capacity which are stored in advance; and identifying the shale oil deposit effective reservoir according to the weighted values, the content of the organic carbon, the rock brittleness index and the formation pressure coefficient. Through the method and the device, actual production requirement of fracturing effective intervals in exploration and development of the shale oil deposit effective reservoir are met.

Description

technical field [0001] The invention relates to the technical field of geological exploration, in particular to the logging field of oil and gas reservoirs in petroleum exploration, specifically a method and equipment for identifying effective reservoirs of shale oil reservoirs. Background technique [0002] Shale reservoirs are one type of unconventional reservoirs. With the development of the petroleum industry, there are fewer and fewer fields available for exploration of conventional oil and gas reservoirs, and more and more attention has been paid to unconventional oil and gas reservoirs. [0003] At present, the large-scale shale oil and gas discovered in foreign countries are mainly marine deposits, while the mud shale reservoirs discovered in China are mainly continental deposits. Both of them have certain differences in geological characteristics and formation conditions. difference. At present, domestic research on shale reservoirs mainly focuses on geological ch...

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Problems solved by technology

[0004] The evaluation criteria for effective reservoirs in conventional oil and gas reservoirs are mainly to establish the lower limit of physical parameters, namely porosity and permeability, and oil-bearing parameters, namely oil saturation. The effective reservoir evaluation method of conventional oil and gas reservoirs is not suitable for unconventional shale oil reservoirs due to the characteristics of fracturing, development of micro-fractures, strong reservoir heterogeneity, and reservoir productivity are usually related to the degree of fracture network formation. Applicable

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