摘要：Methane (CH4), a non-polar molecule characterized by a tetrahedral structure, stands as the simplest organic compound. Predominantly constituting conventional natural gas, shale gas, and combustible ice, it plays a pivotal role as a carbon-based resource and a key raw material in the petrochemical industry. In natural formations, CH4 and H2O coexist in a synergistic system. This interplay necessitates a thorough examination of the phase equilibrium in the CH4-H2O system and CH4’s solubility under extreme conditions of temperature and pressure, which is crucial for understanding the genesis and development of gas reservoirs. This study synthesizes a comprehensive solubility database by aggregating extensive solubility data of CH4 in both pure and saline water. Utilizing this database, the study updates and refines the key parameters of Henry’s law. The updated Henry’s law has a prediction error of 22.86% at less than 40 MPa, which is an improvement in prediction accuracy compared to before the update. However, the modified Henry’s law suffers from poor calculation accuracy under certain pressure conditions. To further improve the accuracy of solubility prediction, this work also trains a BP (Back Propagation) neural network model based on the database. In addition, MSE (Mean-Square Error) is used as the model evaluation index, and pressure, temperature, compression coefficient, salinity, and fugacity are preferred as input variables, which finally reduces the mean relative error of the model to 16.32%, and the calculation results are more accurate than the modified Henry’s law. In conclusion, this study provides a novel and more accurate method for predicting CH4 solubility by comparing modified Henry’s law to neural network modeling. ? 2024 by the authors.

ISSN号：2227-9717

卷、期、页：卷12期6

发表日期：2024-06-01

期刊分区（SCI为中科院分区）：四区

收录情况：SCI（科学引文索引印刷版）,SCIE（科学引文索引网络版）

发表期刊名称：Processes

参与作者：石海磊

通讯作者：赵迎,于嘉豪,郭俊垚,刘大千,林炬

第一作者：宋尚飞,吴海浩,宫敬

论文类型：期刊论文

论文概要：赵迎,于嘉豪,石海磊,郭俊垚,刘大千,林炬,宋尚飞,吴海浩,宫敬，Study of Methane Solubility Calculation Based on Modified Henry’s Law and BP Neural Network，Processes，2024，卷12期6

论文题目：Study of Methane Solubility Calculation Based on Modified Henry’s Law and BP Neural Network