Study on Phase Transition and Gas Deviation Coefficient of Natural Gas with High Carbon Dioxide Content

地球科学国际期刊(英文) Pub Date : 2022-01-01 DOI:10.4236/ijg.2022.314014

Tao Zhou

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引用次数: 1

Abstract

It is the basic research subject that analyzes and calculate the law and numerical value of phase change and gas deviation coefficient of natural gas with high-CO 2 content in the process of safe and effective development of gas reservoirs, which is obtained by high-pressure physical properties PVT (Pres-sure-Volume-Temperature) experiments and different calculation methods calculations. Aiming at natural gas with high-CO 2 content in the Dongfang gas field, the phase change characteristics and physical parameters of different PVT samples are simulated and tested by Chandler 3000-GL analyzer and PVT SIM software. The experimental data shows that the phase state of natural gas with different content of CO 2 has not changed in the study range. At the same time, the deviation coefficient calculated by different calculation methods (DPR, DAK, BB, HY, Gopal) are compared with the experimental data, and the applicable scope of different calculation methods are obtained. The results show that the improved Gopal has high accuracy and is suitable for the calculation of the deviation coefficient of natural gas with high-CO 2 content under high temperature and high pressure in the Dongfang gas field.

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高二氧化碳天然气相变及气相偏差系数研究

通过高压物性PVT (pressure - volume - temperature，压力-体积-温度)实验和不同计算方法计算得到的高co2含量天然气在气藏安全有效开发过程中的相变和气偏差系数规律及数值，是基础研究课题。针对东方气田高co 2含量天然气，利用Chandler 3000-GL分析仪和PVT SIM软件对不同PVT样品的相变特征和物性参数进行了模拟测试。实验数据表明，在研究范围内，不同CO 2含量天然气的相态没有发生变化。同时，将不同计算方法(DPR、DAK、BB、HY、Gopal)计算出的偏差系数与实验数据进行对比，得出不同计算方法的适用范围。结果表明，改进后的Gopal具有较高的精度，适用于计算东方气田高温高压下高co 2含量天然气的偏差系数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

地球科学国际期刊(英文)

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发文量

856