Method for comprehensively discriminating clastic rock source system based on multiple parameters

Abstract

The invention relates to a method for comprehensively discriminating a clastic rock source system based on multiple parameters. The method comprises steps that for data selection, parameters capable of reflecting changes in a clastic rock source in the current period are selected; parameter preprocessing is performed according to an identified target interval; for parameter calculation, fractal dimension calculation of natural gamma data is performed, and average values of the clastic rock content and sorting coefficients are performed; a source identification plate is established, and a far and near source plate is drawn; taking the natural gamma data after fractal dimension calculation, the clastic rock content after averaging processing and the sorting coefficients as parameters, the source identification plate and the far and near source plate are drawn, and the source identification plate and the far and near source plate are verified according to known heavy mine data analysis; and source identification is performed according to the plates. The method is advantaged in that limitations of lack of experimental data in the sea are effectively solved, interpretation of the sourceis performed through utilizing a three-factor source identification plate, and real-time property, intuitive property and high accuracy are realized.

Description

technical field [0001] The invention relates to a method for discriminating clastic rock provenance system in sedimentary basin analysis. In particular, it relates to a method for comprehensively identifying clastic rock provenance systems based on multiple parameters. Background technique [0002] Provenance analysis is of great significance in determining the location and properties of sediment provenance, sediment transport path, and even the sedimentation and tectonic evolution of the entire basin. It can restore the original basin, reconstruct the paleogeography, limit the lateral displacement of the orogenic belt, determine the characteristics of the crust, verify the evolution model of the fault block or orogenic belt, draw the sedimentary system map, conduct the underground strata comparison and evaluate the quality of the reservoir, etc. , can play an important role. At present, the most widely used methods are: heavy mineral method, clastic rock analysis method, ...

AI Technical Summary

Problems solved by technology

In the case of low drilling degree and limited experimental methods such as heavy mineral and elemental analysis, the provenance can only be judged by methods such as sandstone percentage or sandstone thickness, but the accuracy is extremely low, and clastic rocks cannot be effectively judged Provenance

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