低渗致密油藏压裂驱油剂渗吸影响因素灰色关联分析  

Grey correlation analysis of factors affecting the imbibition of fracturing displacement agents in low-permeability tight oil reservoirs

作　　者：罗向荣[1,2] 陈贝尔 李建山[3] 杨立安 任晓娟[1,2] 刘卫丽 潘谦宏 LUO Xiangrong;CHEN Beier;LI Jianshan;YANG Lian;REN Xiaojuan;LIU Weili;PAN Qianhong(Engineering Research Center of Development and Management for Low to Extra-Low Permeability Oil&Gas Reservoirs in West China,Ministry of Education,Xi’an Shiyou University,Xi’an 710065,China;School of Petroleum Engineering,Xi’an Shiyou University,Xi’an 710065,China;Oil&Gas Technology Research Institute,PetroChina Changqing Oilfield Company,Xi’an 710018,China;Shaanxi Tiancheng Petroleum Technology Co.,Ltd.,Xi’an 710018,China;Xi’an Changqing Chemical Group Co.,Ltd.,Xi’an 710018,China)

机构地区：[1]西安石油大学西部低渗—特低渗油藏开发与治理教育部工程研究中心,陕西西安710065 [2]西安石油大学石油工程学院,陕西西安710065 [3]中国石油长庆油田分公司油气工艺研究院,陕西西安710018 [4]陕西天成石油科技有限公司,陕西西安710018 [5]西安长庆化工集团有限公司,陕西西安710018

出　　处：《应用化工》2024年第11期2569-2575,2581,共8页Applied Chemical Industry

基　　金：陕西省自然科学基础研究计划项目(2021JQ-599);西安石油大学研究生创新与实践能力培养计划资助(YCS23214207)。

摘　　要：水力压裂辅助驱油技术是实现低渗致密油藏高效开发的关键手段,渗吸效率是评价低渗致密油藏压裂驱油效果的一个重要指标,影响压裂驱油剂渗吸效率的因素较多。为理清影响低渗致密油藏压裂驱油剂渗吸效率的主要因素,采用灰色关联分析法探究各因素对渗吸效果的影响程度。首先,通过室内测试,对压裂驱油剂的性能进行评价,包括润湿性、界面张力、乳化性、静态吸附等,并开展渗吸驱油实验研究,得到了相应的渗吸效率及渗吸效率增加值。然后,建立了灰色关联分析模型,计算了所选取因素与渗吸效率之间的关联度。最后,通过理论分析,验证了模型的有效性。研究结果表明,润湿性和乳化性是影响压裂驱油剂渗吸的主要因素,其关联度较高。而静态吸附量和界面张力与渗吸的关联度较低,对渗吸的影响较小。研究的结果对于深入理解低渗致密油藏压裂驱油剂渗吸机理及压裂驱油剂的优选具有重要意义,为低渗致密油田的高效开发提供了理论依据和技术支持,同时,也为其它类型的油藏渗吸影响因素的研究提供了方法借鉴。Hydraulic fracturing-assisted oil displacement technology is a key means to achieve efficient development of low-permeability tight oil reservoirs.Permeability absorption efficiency is an important indicator for evaluating the effectiveness of hydraulic fracturing in tight oil reservoirs with low permeability,and there are many factors that affect the permeability absorption efficiency of hydraulic fracturing agents.In order to clarify the main factors affecting the permeability absorption efficiency of hydraulic fracturing agents in low-permeability tight oil reservoirs,this study uses the grey relational analysis method to explore the degree of influence of various factors on the absorption effect.Firstly,through laboratory tests,the performance of hydraulic fracturing agents is evaluated,including wettability,interfacial tension,emulsification,static adsorption,etc.,and permeability absorption oil displacement experiments are conducted to obtain the corresponding permeability absorption efficiency and the increase in permeability absorption efficiency.Then,a grey relational analysis model is established to calculate the correlation between the selected factors and the permeability absorption efficiency.Finally,the effectiveness of the model is verified through theoretical analysis.The results indicate that wettability and emulsification are the main factors affecting the absorption of hydraulic fracturing agents,with a high degree of correlation.On the other hand,the correlation between static adsorption and interfacial tension and absorption is low,and their influence on absorption is small.The results of this study are of great significance for a deeper understanding of the absorption mechanism of hydraulic fracturing agents in low-permeability tight oil reservoirs and the optimal selection of hydraulic fracturing agents,providing a theoretical basis and technical support for the efficient development of low-permeability tight oil fields.At the same time,it also provides a method reference for the study of a

关 键 词：低渗致密油藏 压裂驱油剂 渗吸效率 灰色关联分析 影响因素 

分 类 号：TQ423.94[化学工程]