Method and device for determining fracturing indexes of reservoir stratum

Abstract

The embodiment of the invention discloses a method and device for determining the fracturing indexes of a reservoir stratum. Logging data of the target reservoir stratum at a target well position areprovided; the target reservoir stratum comprises a plurality of sampling points at the target well position, and the logging data comprise logging parameter information at the sampling point positions. The method comprises the following steps that based on the content of rock mineral components in the logging parameter information, the brittleness indexes at the sampling point positions are determined; based on the rock density and the interval transit time in the logging parameter information, the fracturing toughness indexes at the sampling point positions are determined; based on the porosity in the logging parameter information, the rock uniaxial compressive strength at the sampling point positions are determined; and based on the brittleness indexes, the fracturing toughness indexes and the rock uniaxial compressive strength, the fracturing indexes at the sampling point positions are determined. According to the technical scheme provided by the embodiment of the invention, the accuracy of the determined fracturing indexes of the reservoir stratum can be improved.

Description

technical field [0001] The present application relates to the technical field of petroleum geophysical exploration, in particular to a method and device for determining the fracturing index of a reservoir. Background technique [0002] Tight oil and gas reservoirs are usually characterized by heterogeneity, low porosity, low permeability, and large gas flow resistance. It is difficult to carry out effective oil and gas extraction with conventional production methods. Therefore, fracturing measures are usually required. Transformation is carried out to connect the pores and fractures in the reservoir to achieve the purpose of increasing production. Currently, directional well volume fracturing technology and horizontal well staged fracturing technology are usually used to treat tight oil and gas reservoirs. The initial oil and gas production of fracturing treatment has increased, but the production declines rapidly in the later period, and the input and output are relatively...

AI Technical Summary

Problems solved by technology

The initial oil and gas production of fracturing treatment has increased, but the production declines rapidly in the later period, and the input and output are relatively low. In addition, during the fracturing process, oil layers are often missed or no new fractures are produced, which poses great obstacles to the implementation of later measures. It is difficult to meet the basic and technical requirements for increasing reserves and production

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