Quantitative recovery method and apparatus for paleo-water depth

Abstract

The invention relates to the technical field of paleoenvironment recovery, and specifically relates to a quantitative recovery method and apparatus for a paleo-water depth. The method comprises the following steps: determining a beach and dam development region in a research layer of a paleo lake basin; determining a single-point paleo-water depth of at least one typical well in the beach and dam development region; determining a Th content and a U content in the at least one typical well in the beach and dam development region, and according to the Th content and the U content, calculating a ratio of the Th to the U; according to the single-point paleo-water depths of all the typical wells and the Th / U ratio corresponding to positions of the single-point paleo-water depths, fitting a relation equation between the single-point paleo-water depths and the Th / U value, and recovering quantitative paleo-water depths of the typical wells; and according to the relation equation between the single-point paleo-water depths and the Th / U value, recovering quantitative paleo-water depths of other wells in a non-beach-dam development region in the paleo lake basin. Through the method, continuous quantitative paleo-water depth data of water body depth vertical and planar change of the paleo lake basin in the same deposition period can be obtained.

Description

technical field [0001] The invention relates to the field of paleoenvironment restoration, in particular to a quantitative restoration method and device for ancient water depth. Background technique [0002] Sediments entered paleo-oceans or lakes along with transport media, and the corresponding depth of the water body when sedimentation occurred is called paleo-water depth. Petroleum is mainly stored in sedimentary strata formed by paleo-oceans or lakes being filled with sediments. Especially in my country, oil and gas resources are mainly formed and stored in sedimentary basins formed by paleo-lakes. The depth of the water body when the sediment is deposited helps to judge the sedimentary hydrodynamics, sedimentary environment and sedimentary facies, and is of great significance to the exploration, development and evaluation of oil and gas fields. [0003] The existing methods for quantitative restoration of paleo-water depth during paleo-lake basin sedimentation are main...

AI Technical Summary

Problems solved by technology

However, the results obtained by the existing corrugation restoration method are the single-point ancient water depth data at the place where the corrugations developed, and it is impossible to obtain the continuous data of the depth change of the lake basin water body in the same depositional period.

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