Generation method and device of inter-well reservoir three-dimensional comparison diagram

Abstract

The invention relates to a generation method and device of an inter-well reservoir three-dimensional comparison diagram. According to the three-dimensional contrast method of inter-well reservoirs, based on the three-dimensional coordinates of drilling trajectories and de-lamination points above wells, inter-well comparison connection lines drawn under a two-dimensional section are converted into three-dimensional vector connection lines in a three-dimensional space, and a three-dimensional grid diagram is generated; after all inter-well comparison is completed, the inter-well comparison connection lines are classified, and inter-well comparison connection lines which are connected with one another are classified as one category; each category is corresponding to an independent reservoir unit; and the boundaries of the inter-well comparison connection lines are calculated, reservoir unit interfaces are obtained through surface fitting, and the quantitative characterization of the reservoir unit interfaces can be realized. With the method adopted, the accuracy and efficiency of the comparison of the inter-well reservoirs can be improved, and the integration of reservoir comparison, three-dimensional visualization and quantitative interface characterization can be realized.

Description

technical field [0001] The invention relates to the field of reservoir description and characterization of oil field development technology. Background technique [0002] Reservoir correlation plays an important role in understanding reservoir structure and guiding oilfield development, and is a major research work for geologists. With the gradual densification of the oilfield well pattern, the accuracy of reservoir research is gradually improved, and the reservoir unit of interwell correlation is refined from composite sand body to single sand body or even the internal configuration of single sand body, which puts forward higher requirements for reservoir correlation technology. requirements. [0003] Traditional interwell reservoir correlation is carried out in a two-dimensional section. Under the two-dimensional section, geological and geophysical information such as well logging curves related to the well are displayed, and single well formations, sedimentary units or c...

AI Technical Summary

Problems solved by technology

However, when the geological objects faced by reservoir correlation are getting smaller and smaller, many problems have been encountered in cross-well reservoir correlation in 2D sections

First of all, the inter-well correlation under the two-dimensional cross-section obtains the two-dimensional contrast line. For geologists, it is difficult to intuitively observe the spatial three-dimensional shape of the inter-well contrast line formed after multi-well correlation

For fluvial facies reservoirs that are widely developed and have poor lateral continuity, it is very easy to have problems such as cross bedding and non-closure during the correlation process, and it is difficult to find correlation errors during the correlation process

Once there is an error, it often needs to be compared again, which is inefficient and time-consuming

In addition, the results of 2D cross-section comparison cannot be directly converted into the reservoir unit interface in space, so it is difficult to be used in later reservoir modeling work. These limitations and practical requirements urgently require the establishment of an efficient cross-well reservoir correlation technology to improve Accuracy and efficiency of cross-well reservoir correlation for rapid quantitative characterization of reservoir unit interfaces

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