方法理论

原油-CO2相互作用机理分子动力学模拟研究

  • 李建山 ,
  • 高浩 ,
  • 鄢长灏 ,
  • 王石头 ,
  • 王亮亮
展开
  • 1.中国石油长庆油田分公司油气工艺研究院,陕西 西安 710018
    2.中国石油长庆油田分公司低渗透油气田勘探开发国家工程实验室,陕西 西安 710018
    3.中国石油大学(华东)石油工程学院,山东 青岛 266580
李建山(1975—),男,硕士,高级工程师,主要从事低渗透油藏压裂酸化增产技术及三次采油技术研究。地址:陕西省西安市未央区明光路长庆油田油气工艺研究院,邮政编码:710018。E-mail:lijians_cq@petrochina.com.cn

收稿日期: 2022-11-18

  网络出版日期: 2024-03-05

基金资助

中国石油科学研究与技术开发项目“长庆油田低渗透油藏CO2驱油与埋存关键技术研究与应用”(2014E-36);中国石油科学研究与技术开发项目“二氧化碳规模化捕集、驱油与埋存全产业链关键技术研究及示范”(2021ZZ01)

Molecular dynamics simulation on interaction mechanisms of crude oil and CO2

  • Jianshan LI ,
  • Hao GAO ,
  • Changhao YAN ,
  • Shitou WANG ,
  • Liangliang WANG
Expand
  • 1. Research Institute of Oil and Gas Technology, PetroChina Changqing Oilfield Company, Xi’an, Shaanxi 710018, China
    2. National Engineering Laboratory for Exploration and Development of Low-Permeability Oil & Gas Fields, PetroChina Changqing Oilfield Company, Xi’an, Shaanxi 710018, China
    3. School of Petroleum Engineering, China University of Petroleum(East China), Qingdao, Shandong 266580, China

Received date: 2022-11-18

  Online published: 2024-03-05

摘要

CO2的众多驱油机理已经被广泛认同,但受油藏因素影响,不同油藏条件下CO2驱的效果差异较大。因此,需要进一步深化研究CO2与原油的微观相互作用机理,明确不同油藏条件下CO2的驱油方式,最大限度挖潜CO2驱的潜力。利用分子动力学模拟方法研究了组分、温度、压力对油滴-CO2相互作用的影响。求取动力学参数,量化表征油滴-CO2间的相互作用,厘清了不同条件下二者的微观相互作用规律。模拟结果显示,色散力是主导CO2-烷烃分子相互作用的主要作用能,二者相互作用主要包含两方面:一是CO2分子克服烷烃分子间的位阻作用向油滴内部溶解扩散,二是CO2分子对油滴外层分子的萃取吸引作用。随着烷烃分子链长减小、温度降低和压力增加,油滴溶解度参数和CO2配位数增加,油滴外层分子的弯曲度减小,二者的相互作用增强。研究结果认为,在温度较低、压力较高的轻质和中轻质油藏中,应尽可能地实现CO2混相驱和近混相驱,在温度较高、压力较低的中质和重质油藏中,应充分发挥CO2非混相驱的溶解降黏、膨胀原油体积和补充能量的优势。研究结果能够为室内研究和现场实施CO2驱油提供理论指导。

本文引用格式

李建山 , 高浩 , 鄢长灏 , 王石头 , 王亮亮 . 原油-CO2相互作用机理分子动力学模拟研究[J]. 油气藏评价与开发, 2024 , 14(1) : 26 -34 . DOI: 10.13809/j.cnki.cn32-1825/te.2024.01.004

Abstract

Numerous oil displacing mechanisms of CO2 have been widely recognized, but due to reservoir factors, the effectiveness of CO2 flooding varies significantly under different reservoir conditions. It is necessary to further deepen the research on the micro-interaction mechanisms between CO2 and crude oil, clarify the CO2 flooding mode under different reservoir conditions, and maximize the potential of CO2 flooding. Molecular dynamics simulation methods have been used to study the effects of components, temperature, and pressure on the interaction between oil droplets and CO2. The kinetic parameters were obtained to quantitatively characterize the oil droplets-CO2 interaction, clarifying the micro-interaction patterns under different conditions. The simulation results show that the dispersion force is the the main driving force of the interaction between CO2 and alkane molecules, which mainly includes two aspects: one is the dissolution and diffusion of CO2 molecules into the oil droplets by overcoming the steric hindrance between alkane molecules, and the other is the extraction attraction of CO2 molecules to the outer layer molecules of the oil droplets. As the chain length of alkane molecules decreases, the temperature decreases and the pressure increases, the solubility parameter of the oil droplets and the coordination number of CO2 increase, the curvature of the molecules in the outer layer of the oil droplets decreases, and the interaction between the two is enhanced. It is concluded that CO2 miscible and near-miscible flooding should be realised as much as possible in light and medium-light reservoirs with lower temperatures and higher pressures, while in medium and heavy reservoirs with higher temperatures and lower pressures, the advantages of CO2 non-miscible flooding in terms of dissolution viscosity reduction, crude oil volume expansion and energy replenishment should be fully exploited. The study results can provide theoretical guidance for laboratorial research and field application of CO2 flooding.

参考文献

[1] 王高峰, 廖广志, 李宏斌, 等. CO2驱气机理与提高采收率评价模型[J]. 油气藏评价与开发, 2022, 12(5): 734-740.
[1] WANG Gaofeng, LIAO Guangzhi, LI Hongbin, et al. Mechanism and calculation model of EOR by CO2 flooding[J]. Petroleum Reservoir Evaluation and Development, 2022, 12(5): 734-740.
[2] 李士伦, 汤勇, 侯承希. 注CO2提高采收率技术现状及发展趋势[J]. 油气藏评价与开发, 2019, 9(3): 1-8.
[2] LI Shilun, TANG Yong, HOU Chengxi. Present situation and development trend of CO2 injection enhanced oil recovery technology[J]. Petroleum Reservoir Evaluation and Development, 2019, 9(3): 1-8.
[3] 向勇, 侯力, 杜猛, 等. 中国CCUS-EOR技术研究进展及发展前景[J]. 油气地质与采收率, 2023, 30(2): 1-17.
[3] XIANG Yong, HOU Li, DU Meng, et al. Research progress and development prospect of CCUS-EOR technologies in China[J]. Petroleum Geology and Recovery Efficiency, 2023, 30(2): 1-17.
[4] 陈欢庆. CO2驱油与埋存技术新进展[J]. 油气地质与采收率, 2023, 30(2): 18-26.
[4] CHEN Huanqing. New progress of CO2 flooding and storage technology[J]. Petroleum Geology and Recovery Efficiency, 2023, 30(2): 18-26.
[5] 王香增, 杨红, 王伟, 等. 低渗透致密油藏CO2驱油与封存技术及实践[J]. 油气地质与采收率, 2023, 30(2): 27-35.
[5] WANG Xiangzeng, YANG Hong, WANG Wei, et al. Technology and practice of CO2 flooding and storage in low-permeability tight reservoirs[J]. Petroleum Geology and Recovery Efficiency, 2023, 30(2): 27-35.
[6] 孟新. 中国CCUS-EOR项目经济效果及其提升手段研究[J]. 油气地质与采收率, 2023, 30(2): 181-186.
[6] MENG Xin. Research on economic effect of China’s CCUS-EOR projects and its improvement methods[J]. Petroleum Geology and Recovery Efficiency, 2023, 30(2): 181-186.
[7] 张宗檩, 吕广忠, 王杰. 胜利油田CCUS技术及应用[J]. 油气藏评价与开发, 2021, 11(6): 812-822.
[7] ZHANG Zonglin, LYU Guangzhong, WANG Jie. CCUS and its application in Shengli Oilfield[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(6): 812-822.
[8] 袁士义. CCUS是最现实可行的化石能源低碳发展技术—写在《中国碳捕集利用与封存技术评估报告》发布之际[J]. 可持续发展经济导刊, 2022(5): 35-37.
[8] YUAN Shiyi. CCUS is the most feasible low-carbon development technology for fossil fuels: Written in the release of “China’s carbon capture, utilization and storage technical evaluation report”[J]. China Sustainability Tribune, 2022(5): 35-37.
[9] WEI B, GAO H, PU W F, et al. Interactions and phase behaviors between oleic phase and CO2from swelling to miscibility in CO2-based enhanced oil recovery(EOR) process: A comprehensive visualization study[J]. Journal of Molecular Liquids, 2017, 232: 277-284.
[10] 陈世杰, 潘毅, 孙雷, 等. 低渗高凝油藏CO2复合驱提高采收率机理实验研究[J]. 油气藏评价与开发, 2021, 11(6): 823-830.
[10] CHEN Shijie, PAN Yi, SUN Lei, et al. Mechanism of enhanced oil recovery by CO2 combination flooding in low permeability and high pour-point reservoir[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(6): 823-830.
[11] 户海胜, 高阳, 单江涛, 等. 超临界CO2萃取致密砂砾岩中原油效果影响因素实验研究[J]. 油气藏评价与开发, 2021, 11(6): 845-851.
[11] HU Haisheng, GAO Yang, SHAN Jiangtao, et al. Experimental researches on factors influencing supercritical CO2 extraction effect of crude oil from tight sandy conglomerate[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(6): 845-851.
[12] 杨术刚, 蔡明玉, 张坤峰, 等. CO2-水-岩相互作用对CO2地质封存体物性影响研究进展及展望[J]. 油气地质与采收率, 2023, 30(6): 80-91.
[12] YANG Shugang, CAI Mingyu, ZHANG Kunfeng, et al. Research progress and prospect of CO2-water-rock interaction on petrophysical properties of CO2 geological sequestration[J]. Petroleum Geology and Recovery Efficiency, 2023, 30(6): 80-91.
[13] 徐建平, 袁远达, 谢青, 等. 分子动力学在聚合物驱油中的应用研究进展[J]. 油气藏评价与开发, 2021, 11(3): 414-421.
[13] XU Jianping, YUAN Yuanda, XIE Qing, et al. Advance in application of molecular dynamics simulation in polymer flooding[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(3): 414-421.
[14] 宋书伶, 杨二龙, 沙明宇. 基于分子模拟的页岩油赋存状态影响因素研究[J]. 油气藏评价与开发, 2023, 13(1): 31-38.
[14] SONG Shuling, YANG Erlong, SHA Mingyu. Influencing factors of occurrence state of shale oil based on molecular simulation[J]. Petroleum Reservoir Evaluation and Development, 2023, 13(1): 31-38.
[15] 向雪妮, 黄亮, 周文, 等. 基于分子模拟的气体水合物结构特征及储气特性研究[J]. 油气藏评价与开发, 2022, 12(5): 825-832.
[15] XIANG Xueni, HUANG Liang, ZHOU Wen, et al. Structural characteristics and gas storage properties of gas hydrates based on molecular simulation[J]. Petroleum Reservoir Evaluation and Development, 2022, 12(5): 825-832.
[16] 李晶辉, 韩鑫, 黄思婧, 等. 页岩干酪根吸附规律的分子模拟研究[J]. 油气藏评价与开发, 2022, 12(3): 455-461.
[16] LI Jinghui, HAN Xin, HUANG Sijing, et al. Molecular simulation of adsorption law for shale kerogen[J]. Reservoir Evaluation and Development, 2022, 12(3): 455-461.
[17] FANG T M, WANG M H, WANG C, et al. Oil detachment mechanism in CO2 flooding from silica surface: Molecular dynamics simulation[J]. Chemical Engineering Science, 2017, 164: 17-22.
[18] LIU B, SHI J Q, SUN B J, et al. Molecular dynamics simulation on volume swelling of CO2-alkane system[J]. Fuel, 2015, 143: 194-201.
[19] 张军, 房体明, 王业飞, 等. 烷烃油滴在超临界二氧化碳中溶解的分子动力学模拟[J]. 中国石油大学学报(自然科学版), 2015(39): 129.
[19] ZHANG Jun, FANG Timing, WANG Yefei, et al. Molecular dynamics simulation of dissolution of n-alkanes droplets in supercritical carbon dioxide[J]. Journal of China University of Petroleum(Science and Technology), 2015(39): 129.
[20] 韩波, 翟志伟, 于伟东, 等. 油藏CO2驱过程中最小混相压力的动态变化及其影响因素分析[J]. 非常规油气, 2022, (1): 98-104.
[20] HAN Bo, ZHAI Zhiwei, YU Weidong, et al. Dynamic analysis of minimum miscibility pressure during CO2 flooding reservoirs and its influencing factors[J]. Unconventional Oil & Gas, 2022, (1): 98-104.
[21] AHMADI M, HOU Q F, WANG Y Y, et al. Interfacial and molecular interactions between fractions of heavy oil and surfactants in porous media: Comprehensive review[J]. Advances in Colloid and Interface Science, 2020, 283: 102242.
[22] ZHANG J F, PAN Z J, LIU K Y, et al. Molecular simulation of CO2 solubility and its effect on octane swelling[J]. Energy & Fuels, 2013, 27: 2741-2747.
[23] FANG T M, WANG M H, WANG C, et al. Oil detachment mechanism in CO2 flooding from silica surface: Molecular dynamics simulation[J]. Chemical Engineering Science, 2017, 164: 17-22.
[24] FANG T M, WANG M H, LI J W, et al. Study on the asphaltene precipitation in CO2 Flooding: A perspective from molecular dynamics simulation[J]. Industrial & Engineering Chemistry Research, 2018, 57(3): 1071-1077.
文章导航

/