Shale gas reservoir stratum exploration method and device

Abstract

The invention relates to the technical field of exploration, in particular to a shale gas reservoir stratum exploration method and device. The shale gas reservoir stratum exploration method comprises the steps of obtaining a core sample in a target exploration area, determining hydrodynamic force causes of a shale bed to which the core sample belongs according to the shale sedimentary structure of the core sample, calculating the total organic carbon value of the core sample after the hydrodynamic force causes of the core sample are determined, determining shale gas storage information of the shale bed to which the core sample belongs according to the hydrodynamic force causes and the total organic carbon value of the core sample, and conducting shale gas reservoir stratum positioning exploration on the target exploration area according to the determined shale gas storage information. According to the shale gas reservoir stratum exploration method and device, the number of referred parameters is small, data are easy to obtain, the cost for evaluation of favorable zones and the reservoir stratum in the earlier stage of exploration is reduced, the evaluation period is shortened, the reservoir stratum evaluation problem existing in the earlier stage of exploration can be better solved, and actual requirements for shale gas exploration development can be better met.

Description

technical field [0001] The invention relates to the technical field of exploration, in particular to a method and device for exploring shale gas reservoirs. Background technique [0002] Shale gas is the most important type of unconventional natural gas. It has the characteristics of high reserves and clean use. Under the current situation of relative shortage of resources, shale gas is expected to become a substitute for conventional natural gas resources. [0003] In the process of shale gas exploration and development, it is first necessary to judge the storage status of shale gas in the target area. Most of the current evaluation methods for shale gas reservoir status use the rose diagram evaluation method, such as figure 1 As shown in Fig. 1, obtain the shale thickness, gas content, total organic carbon TOC, porosity and vitrinite reflectance of the shale in the target area, and set the constraints and evaluations among the above elements according to the exploration re...

AI Technical Summary

Problems solved by technology

However, in the early stage of shale gas exploration, there is relatively little data on shale gas in the target area, there are many exploration layers, the exploration range is large, and the distribution of favorable layers and zones for shale gas storage is not clear, so it is difficult to quickly Effectively evaluate shale gas reservoirs, and it takes a long period to obtain relevant evaluation elements, and the cost is relatively high

[0005] It can be seen from this that the existing shale gas exploration methods cannot meet the needs of quickly finding favorable exploration targets in the early stage of shale gas exploration

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