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An evaluation site scale co 2 Approaches to the storage potential of saline aquifers

A technology for storage potential, salt water layers, applied in special data processing applications, instruments, electrical digital data processing, etc., which can solve problems such as errors and errors in evaluation results

Inactive Publication Date: 2018-02-02
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

The effective storage coefficient usually refers to the value obtained by the U.S. Department of Energy using the Monte Carlo method for the geological conditions of North America, but this cannot represent all geological conditions, which may easily lead to errors or even errors in the evaluation results. For CO 2 Storage site selection, etc. provide wrong guidance
In addition, these methods mostly focus on basin-scale CO 2 Storage potential evaluation, while for more practical site-scale CO 2 Storage potential evaluation method has not been established

Method used

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  • An evaluation site scale co <sub>2</sub> Approaches to the storage potential of saline aquifers
  • An evaluation site scale co <sub>2</sub> Approaches to the storage potential of saline aquifers
  • An evaluation site scale co <sub>2</sub> Approaches to the storage potential of saline aquifers

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no. 1 example

[0091] Using the above site scale CO 2 The storage potential evaluation method was carried out under the condition of single well injection of CO 2 Evaluation of storage potential of saline aquifers. of which CO 2 The injection reservoir depth is 1350m, the reservoir thickness is 9.5m, the average porosity of the reservoir is 29.27%, the temperature of the reservoir is 50°C and the pressure is 135bar. Look up the table (Zhang Chuanru, 1999) to get CO under reservoir conditions 2 The density is 610.5kg / m 3 . Based on the CO 2 Storage test monitoring data and water-rock-CO 2 Based on the interaction experimental data, it is concluded that under the conditions of an injection rate of 300 tons / day and an injection volume of 20,000 tons, CO 2 The effective influence radius of the halo is 0.5 km, and the free CO in the saline layer 2 The saturation is 23%, then the formation water saturation is 77%, CO 2 Dissolution contribution to bicarbonate concentration f CO2 was 48.8%...

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Abstract

Provided is a method for evaluating the storage potential of a place scale CO<2> salt water layer. The method comprises the steps that 1, a CO<2> halo body in the storage layer is simplified to be in a pyramid shape, the effective storage volume of CO<2> can be calculated through a pyramid model, the volume is defined as the minimum effective volume of CO<2> storage, the CO<2> halo body is simplified to be in a cylinder shape, and the volume of the cylinder is defined as the maximum effective volume of CO<2> storage; 2, the storage potential of free-state CO<2> in the minimum effective storage volume and the storage potential of the free-state CO<2> in the maximum effective storage volume are calculated; 3, the storage potential of dissolved-state CO<2> in the minimum effective storage volume and the storage potential of the dissolved-state CO<2> in the maximum effective storage volume are calculated; 4, the minimum storage potential and the maximum storage potential of the place scale CO<2> salt water layer are obtained according to the sum of the storage potential of the free-state CO<2> and the storage potential of the dissolved-state CO<2>. The storage potential of the place scale CO<2> salt water layer can be accurately obtained.

Description

technical field [0001] The invention belongs to the technical field of geochemistry, in particular to a method for evaluating site-scale CO2 using geochemical and isotope data. 2 Approaches to the storage potential of saline aquifers. Background technique [0002] In the context of current climate change, the energy-saving and emission-reduction industry has become an industry actively promoted by government agencies. CO 2 Capture and storage technologies as CO reduction 2 The most effective method of emissions has been recognized by the majority of scientific workers and government personnel, and it is technically feasible. as CO 2 One of the geological bodies for storage, deep saline aquifers are considered to have the greatest potential. Capable of accurately evaluating CO in saline aquifers 2 Storage potential, for different scale CO 2 Site selection and implementation of storage projects is very important. [0003] Currently existing CO 2 The evaluation methods...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 李义曼庞忠和黄天明罗璐
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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