Prediction Method of Activation Energy in Heavy Oil Combustion Process

Abstract

The invention provides a method for predicting activation energy in the combustion process of heavy oil. Including taking the model heavy oil for distillation to obtain multiple pseudo-components with boiling points at different temperature ranges; performing combustion experiments on multiple pseudo-components separately to obtain the activation energy change curve of each pseudo-component during the combustion process, so as to establish predictions model; analyze the components of the heavy oil sample to be predicted, determine the corresponding relationship between the pseudo-components in the heavy oil sample to be predicted and multiple pseudo-components in the model heavy oil, and obtain the proportion of each pseudo-component in the heavy oil sample to be predicted. Using the prediction model, the percentage of each pseudo-component in the heavy oil sample to be predicted is used as the weight to obtain the weighted average of the activation energy of each pseudo-component, and then the heavy oil to be predicted is obtained. Activation energy curve during the combustion of the sample. The invention can conveniently and accurately predict the change of activation energy of heavy oil from different oil reservoirs in the combustion process, and the cost is low.

Description

technical field [0001] The invention relates to a method for predicting activation energy in the combustion process of heavy oil, belonging to the technical field of oil and gas exploitation. Background technique [0002] Under the situation that the production of conventional crude oil has dropped sharply, the development of heavy oil as an unconventional energy source has attracted more and more attention, and its production has gradually increased. Heavy oil is crude oil with high asphaltene and colloid content, high viscosity and density, also known as heavy oil, which belongs to unconventional oil resources. [0003] Heavy oil reservoirs need to adopt thermal recovery technology, which can be exploited by heating underground reservoirs to reduce the viscosity of heavy oil. The main recovery technologies include steam injection technology and oil layer combustion technology. [0004] The steam injection technology is to inject the high-temperature steam generated by the...

AI Technical Summary

Problems solved by technology

In the current test, for the convenience of calculation, the fixed default values ​​of the software itself are generally used for parameters such as activation energy. Since the specific reservoir characteristics are not combined, the prediction results obtained by using the software are often very different from the actual results, and it is difficult to achieve different specific values. Dynamic Tracking of Combustion Process under Heavy Oil Reservoir Conditions

In addition, the heavy oil samples from the oil reservoirs to be exploited are directly taken for combustion experiments to measure the change of activation energy. However, when this method measures the activation energy of heavy oils from different reservoirs, it is necessary to carry out combustion experiments on the heavy oil samples every time. , time-consuming, high cost, difficult to meet the needs of production

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