| 基于PCA结合污染物迁移模型的油气田开采影响环境的风险评估研究 |
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| 引用本文： | 王健宇,宋晶晶,陈蓓.基于PCA结合污染物迁移模型的油气田开采影响环境的风险评估研究[J].盐湖研究,2022,30(3). |
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| 作者姓名： | 王健宇 宋晶晶 陈蓓 |
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| 作者单位： | 重庆市计量质量检测研究院,重庆市计量质量检测研究院,重庆大学 重庆;、重庆市计量质量检测研究院 |
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| 摘 要： | 为改善油气田开采过程中的环境,本文结合主成分分析法(Principal Component Analysis)与污染物迁移模型,对研究区的油气田开采过程中的污染物进行了分析,主要研究其在土壤中的迁移程度。本研究首先介绍了油气田开采产生污染物的研究背景与污染物种类,其次结合主成分分析法对污染物中的主要成分进行了筛选,最后构建污染物迁移模型,对污染物在土壤以及水体中的迁移进行了研究。结果表明,本文中的主要污染物为石油类、酸、氟离子、氯离子和COD(Chemical Oxygen Demand)、BOD(Biochemical oxygen demand),石油类所占比重最大,为23.63%；石油类污染物在黑钙土中的迁移最广,直至土层厚度为35cm,污染物浓度从18365 mg/kg降到0；石油类污染物在黑钙土中的迁移符合负指数规律；当酸液浓度在1%、2%、3%、4%时,氢离子在土壤中随深度的变化一致,土层厚度为20cm时,11%的酸液酸值高于低浓度土壤酸值,11%的酸液在快速淋滤状态下比缓慢淋滤快一步到达定值；氯离子和氟离子的迁移深度变化基本符合负指数变化规律；低浓度的污染物比高浓度的污染物更早达到定值；石油类污染物在土壤中的迁移能力较弱；本次研究实验值与模拟值基本一致,研究成果良好。石油类污染物在土壤中的迁移能力较弱,酸性污染物对土壤有一定影响。
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| 关 键 词： | PCA 迁移模型 油气田 污染物 土壤 |
| 收稿时间： | 2021/8/2 0:00:00 |
| 修稿时间： | 2021/9/14 0:00:00 |
Study on environmental risk assessment of oil and gas field exploitation based on PCA combined with pollutant migration model |
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| Wang Jianyu,SONG Jingjing and Chen Bei.Study on environmental risk assessment of oil and gas field exploitation based on PCA combined with pollutant migration model[J].Journal of Salt Lake Research,2022,30(3). |
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| Authors: | Wang Jianyu SONG Jingjing and Chen Bei |
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| Institution: | Chongqing Institute of Metrology and Quality Testing,Chongqing Institute of Metrology and Quality Testing,Chongqing University;Chongqing Institute of Metrology and Quality Testing |
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| Abstract: | In order to improve the environment during oil and gas field exploitation, this paper combined Principal Component Analysis (PCA) and pollutant migration model to analyze the pollutants during oil and gas field exploitation in the study area, and mainly studied their migration degree in the soil.This study first introduced the research background and types of pollutants produced by oil and gas field exploitation, then combined with principal component analysis method to screen the main components of pollutants, and finally built pollutant migration model, and studied the migration of pollutants in soil and water.The results showed that the main pollutants in this study were petroleum, acid, fluorine, chloride, Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD), and petroleum accounted for the largest proportion (23.63%).Petroleum pollutants migrated most widely in chernozem till the thickness of soil layer was 35cm, and the pollutant concentration decreased from 18365 mg/kg to 0.The migration of petroleum pollutants in chernozem conforms to the negative exponential law.When the concentration of acid was 1%, 2%, 3% and 4%, the change of hydrogen ions in the soil was consistent with the depth. When the depth of soil was 20cm, the acid value of 11% acid was higher than that of low concentration soil, and the acid value of 11% reached the fixed value one step faster in the fast leaching state than in the slow leaching state.The migration depth of chloride ion and fluoride ion basically accords with the negative exponential variation.The low concentration of pollutants reached the fixed value earlier than the high concentration of pollutants;The migration capacity of petroleum pollutants in soil is weak.The experimental values of this study are basically consistent with the simulated values, and the research results are good.The migration ability of petroleum pollutants in soil is weak, and the acidic pollutants have a certain effect on soil. |
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| Keywords: | PCA Migration model Oil and gas fields Pollutants soil |
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