Method for identifying conglomerate tight oil reservoir fluid properties

Abstract

The invention discloses an identification method for conglomerate tight oil reservoir fluid properties, and belongs to the field of complex reservoir exploration and development. Characteristic parameters, namely effective porosity and free fluid porosity, of oil saturation are calculated by utilizing nuclear magnetism data, and the purpose is that according to a physical property reservoir control theory, macropores are preferentially filled with oil gas, then an oil-containing factor used for indicating the oiliness of reservoir fluid is calculated in a place far away from an oil-water interface, and then a dessert index is created. According to the method, the problem that the fluid property of the conglomerate tight oil reservoir is difficult to identify is solved, an oil layer, an oil-containing water layer (water layer), an oil-containing layer and a dry layer in the conglomerate tight oil reservoir can be well distinguished, and the limitation of a traditional Archie formula onevaluation of an unconventional hydrocarbon reservoir is overcome.

Description

technical field [0001] The invention belongs to the field of complex reservoir exploration and development, and relates to a method for identifying fluid properties of conglomerate tight oil reservoirs. Background technique [0002] The identification of fluid properties in conglomerate tight oil reservoirs is the key technology for oil testing and layer selection. Whether the oil layer can meet the oil layer standard is related to various factors such as the effective thickness, porosity, permeability, and saturation of the oil layer in the well section. Improving the coincidence rate of logging interpretation, the success rate of oil testing, and the rate of oil and gas discovery is of great significance, and it is also a technical bottleneck in the identification of fluid properties in conglomerate tight oil reservoirs. [0003] In the published literature at home and abroad, the identification method of reservoir fluid properties of conglomerate tight oil is mainly based...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the technical problem in the prior art that the fluid properties of conglomerate tight oil reservoirs cannot be objectively evaluated due to the fact that reservoir fluid identification methods are mostly single-layer interpretations. Therefore, the present invention provides a conglomerate tight oil reservoir Identification method of laminar fluid properties

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