Multi-stage and multi-dimensional evaluation method and device for tight oil volume fracturing effect

Abstract

The invention discloses a multi-stage and multi-dimensional evaluation method and device for the tight oil volume fracturing effect. The method comprises the steps that microcosmic and macroscopic compressibility parameters before fracturing, microcosmic and macroscopic engineering parameters during fracturing as well as microcosmic and macroscopic crack parameters after fracturing are obtained; compressibility evaluation parameters before fracturing are determined according to the microcosmic compressibility parameters and the macroscopic compressibility parameters before fracturing; engineering evaluation parameters during fracturing are determined according to the microcosmic engineering parameters and the macroscopic engineering parameters during fracturing; crack evaluation parametersafter fracturing are determined according to the microscopic crack parameters and the macroscopic crack parameters after fracturing; and a quantitative evaluation value of the tight oil volume fracturing effect is determined according to the compressibility evaluation parameters before fracturing, the engineering evaluation parameters during fracturing and the crack evaluation parameters after fracturing, so that the quantitative evaluation value is used for evaluating the tight oil volume fracturing effect. According to the multi-stage and multi-dimensional evaluation method and device, thethree stages before fracturing, during fracturing and after fracturing are combined, the fracturing effect is evaluated from the macroscopic dimension and the microcosmic dimension, and more accurateinformation and visual comparison are provided.

Description

technical field [0001] The invention relates to the technical field of tight oil reservoir development for fracturing effect evaluation, in particular to a multi-stage and multi-dimensional evaluation method and device for tight oil volume fracturing effect. Background technique [0002] This section is intended to provide a background or context for implementations of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] As one of the most important alternative energy sources in my country, tight oil has great development potential. With the rapid development of fracturing technology, it provides a strong impetus for the development of tight oil. Even so, the quantitative evaluation of tight oil fracturing effects has always been the main problem that plagues the development of tight oil. The final effect of fracturing is not a simple engineering problem, but involves many aspects such...

AI Technical Summary

Problems solved by technology

At present, the evaluation of fracturing effect at home and abroad does not take into account the influence of micro-scale parameters on fracturing effect, and there is a lack of evaluation methods that link macro parameters and micro parameters

In addition, related technologies still mainly focus on single-factor analysis. From a geological point of view, the fracturing effect is evaluated from the mechanical characteristics of rocks, the brittleness of reservoirs, and the distribution characteristics of in-situ stress. Although geological factors It mainly controls the fracturing effect, but this process is a positive causal relationship, lacking the reverse evidence process of the morphological characteristics of the actually formed fracturing fractures; Based on the shape, size and conductivity, the actual effect of fracturing is evaluated through the characteristics of the formed fracturing fractures, which lacks the consideration of positive causality

Relevant studies are not pertinent to the evaluation of tight oil volume fracturing effects, and the factors considered are not comprehensive, and the evaluation of the reservoir before fracturing and the need to evaluate the construction pressure during fracturing are not considered.

Images