Mixed sedimentary rock classification and naming method based on content of three-end-member minerals

Abstract

The invention discloses a mixed sedimentary rock classification and naming method based on content of three-end-member minerals. The upper limit value of the content of exogenous fragments in mixed sedimentary rock is determined according to effective productivity; according to rock components, a three-end-member classification scheme is determined; naming is conducted, wherein according to the contents of the rock components, basic names are determined, and then cement and special structures or diagenesis serve as modifiers to participate in naming; according to a specific naming rule, the basic names are determined respectively according to the mixed sedimentary rock with different main components, when the content of auxiliary minerals is 25-50%, 'material' serves as the additional modifier, and when the content of the auxiliary minerals is smaller than 25%, 'containing' serves as the additional modifier. In the method, the upper limit value of the content of exogenous fragment particles is determined according to effective productivity, the mixed sedimentary rock is named by means of the three end members including exogenous fragments, endogenous fragments and a carbonate interstitial material, a scientific classification system framework suitable for actual production application is constructed on the basis of taking sedimentary causes into consideration, and basic data can be provided for mixed sedimentary environment analysis.

Description

technical field [0001] The patent of the invention belongs to the technical field of rock classification in the petroleum exploration industry, and in particular relates to a method for classifying and naming mixed sedimentary rocks based on the content of three endmember minerals. Background technique [0002] With more and more oil and gas discoveries related to mixed sediments, the classification and naming of mixed sedimentary rocks is of great significance for oil exploration and development. Many scholars have proposed their own classification schemes for mixed sedimentary petrology, but so far there is no unified classification standard, and there are differences in component standards and endmember components. Moreover, due to the complex types and components of mixed sedimentary rocks, it is difficult to name them according to traditional standards, and it is prone to conflicts in the naming of different experimental laboratories. The existing classification scheme...

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Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides a method for classifying and naming mixed sedimentary rocks based on the content of three endmember minerals, which solves the difficulty in naming by traditional standards in the prior art, and the conflicts in the naming of different experimental laboratory institutions are prone to occur. Phenomenon

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