Oil Displacing Mechanism of Soft Microgel Particle Dispersion in Porous Media
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摘要: 储层孔隙结构的非均质性导致水驱不均，不同大小孔隙（喉）之间形成优势渗流流动.在水驱开发中后期，剩余油高度分散在储层孔渗系统中难以启动，如何对孔隙尺度的水驱优势流动进行抑制的同时又确保不堵塞油流通道，使剩余油被高效采出，是当前提高石油采收率技术基础研究的主要方向.制作微观仿真储层孔隙结构与尺度的非均质性物理模型，开展了连续相驱替流体（聚合物溶液、交联聚合物凝胶）和微纳米柔性微凝胶颗粒水分散体系驱油机理的对比实验.实验表明，作为连续相的传统聚合物溶液依靠粘度无区分地增加大小孔隙中的流动阻力，从而赋予低渗层区小孔隙中的剩余油以驱动力，将这些剩余油携带采出，当粘度过大时，甚至难以启动剩余油；微凝胶颗粒分散液作为低粘水分散流体，其中的凝胶颗粒优先进入大孔隙，暂堵在喉道处并抑制相对大孔隙中的流动，同时注入水转向进入相对小的孔隙，将其中的剩余油活塞式推出，该过程在空间和时间上是不断重复的.本文从流度调整的角度对实验结果进行了分析，结果表明传统的连续相驱替流体是依靠提升注入水的粘度实现流度的调整，而微凝胶颗粒水分散体系是通过降低注入水的相对渗透率，并相对提高油相渗透率，从而实现对流度的高效调整.Abstract: The formation heterogeneity causes uneven sweeping of waterflooding. Different degrees of prevailing water flowing are generated due to different sizes of pores and throats. During the middle-late stage of water flooding, it is hard to move the remaining oil since it is scattered in the pores and throats. The EOR (enhanced oil recovery) study is mainly concerned with methods both to inhibit different sized prevailing flowing channels, and to keep oil flowing path free of plugging, which can ensure production efficiency of remaining oil. In this study, the pore-scale microscopic heterogeneous models with real pore structure were established, and different oil displacing mechanisms were compared between continuous phase viscous fluid, such as conventional polymer and crosslinked polymer gel, and micro-nano soft microgel particle dispersion. Results show that the traditional polymer flooding cannot differentiate between high and low permeability or big and small pore, because it relies on viscosity to increase the flowing resistance of all the swept area and it is hard to move the remaining oil when the viscosity is high to some extent. The soft microgel particle dispersion is a type of low viscosity dispersion fluid, and the particles have priority to access relatively big pore and throat, to temporarily inhibit the flowing, and at the same time, the water can be diverted into the relatively small pore and throat, to push the remaining oil out as a piston. The process is repeated continuously. The lab results were analyzed from the view of mobility adjustment in this paper, and it is concluded that the conventional continuous phase driving fluid modified mobility by increasing injection water viscosity, while the soft microgel particle dispersion achieved efficient mobility adjustment by decreasing the relative permeability of injection water and accordingly increased the oil permeable ability.
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图 1 油藏水驱开发中后期不同类别不同级别非均质性示意
Fig. 1. The sketch of different grades of formation heterogeneity
图 2 连续相和分散相流体驱替机理示意
Fig. 2. Displacement mechanism sketch of continuous and discontinuous liquid
图 5 不同驱替介质驱替机理实验过程照片对比
Fig. 5. Oil and water relationship comparing of different flooding ways in microscopic pore and throat
图 6 孔隙结构与尺度仿真微观物理模型示意
Fig. 6. The sketch of microscopic physical simulation model for pore structure and size
图 7 仿真孔隙介质中分散体系同步调驱机理微观实验照片
Fig. 7. SMG's SDD mechanism experiment on pore-scale sand-cast model
图 10 Z70-19井同步调驱前后吸水剖面对比
Fig. 10. Injectivity profile comparison of pre & post SDD on well Z70-19X
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[1] Algharaib, M., Alajmi, A., Gharbi, R., et al., 2012.Enhancing Recovery in High Salinity Oil Reservoirs through Optimized Polymer Flood, International Petroleum Technology Conference, Bangkok.doi:10.2523/IPTC-14685-MS [2] Chen, Y.S., 1997.Countermeasures for Heterogeneity of Continental Oil Field.Petroleum Industry Press, Beijing, 1-20. [3] Du, R.R., Liu, X., 2015.Research on the Microspheres Acrylamide Copolymers Made Via Inverse Microemulsion Polymerization.Chemical Industry and Engineering Progress, 34(8):3065-3074 (in Chinese with English abstract). http://manu24.magtech.com.cn/hgjz/EN/abstract/abstract17431.shtml [4] Han, D.K., 2010.Discussions on Concepts, Countermeasures and Technical Routes for the Redevelopment of High Water-Cut Oilfields.Petroleum Exploration and Development, 37(5):583-591 (in Chinese with English abstract). doi: 10.1016/S1876-3804(10)60055-9 [5] Hewett, T.A., 1971.Fractal Distributions of Reservoir Heterogeneity and Their Influence on Fluid Transport, SPE Annual Technical Conference and Exhibition, New Orleans.doi:10.2118/15386-MS [6] Hou, W.H., 2007.Water Injection Profile Variation of Oil Layers under Polymer Flooding.Petroleum Exploration and Development, 34(4):478-482 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-SKYK200704019.htm [7] Jia, H., Ni, X.L., Zhou, X.Y., et al., 2010.Research Progress on the Adaptability of Polymer Flooding Reservoir.Oil-Gasfield Surface Engineering, 29(9):36-38 (in Chinese with English abstract). [8] Li, Y., Liu, J.M., 2007.Oil Field Development Geology.Petroleum Industry Press, Beijing, 100-114 (in Chinese). [9] Liu, C.X., Wang, Q., Shun, Y.Y., et al., 2014.Research and Application of New Technology of Polymer Flooding Field Application Boundaries.Petroleum Geology and Recovery Efficiency, 21(2):22-24 (in Chinese with English abstract). [10] Ma, Z.G., Wang, Y.H., Kang, H.Y., et al., 2014.Synthesis and Performance Evaluation of a Kind of Crosslinked Polymer Microspher.Journal of Xi'an Shiyou University (Natural Science Edition), 29(4):84-88 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTotal-XASY201404016.htm [11] Qin, J.S., Li, A.F., 2003.Reservoir Physics.Petroleum University Press, Beijing, 271-273 (in Chinese). [12] Shi, Y.J., Pan, B.Z., Jiang, B.C., et al., 2016.Application of Wavelet and Analysis in Identification of Tight Sandstone Gas Reservoirs.Earth Science, 41(12):2127-2135 (in Chinese with English abstract). http://www.en.cnki.com.cn/Article_en/CJFDTotal-DQKX201612017.htm [13] Shi, Y.M., Huo, J., Zhang, Y.G., 2004.At the Late Stage of Oilfield Development in Continental Reservoir Fine Description.Petroleum Industry Press, Beijing, 188-206 (in Chinese). [14] Wu, X.C., Xiong, C.M., Han, D.K., et al., 2014.A New IOR Method for Mature Waterflooding Reservoirs:"Sweep Control Technology", SPE Asia Pacific Oil & Gas Conference & Exhibition, Adelaide.doi:10.2118/171485-MS [15] Wu, X.C., Xiong, C.M., Xun, H.B., et al., 2015.A Novel Particle-Type Polymer and IOR/EOR Property Evaluation.International Petroleum Exhibition and Conference, Abu Dhabi.doi:10.2118/177421-MS [16] Wu, X.C., Zhang, S., Xiong, C.M., et al., 2016.Successful Field Test of a New Polymer Flooding Technology for Improving Heavy Oil Reservoir Recovery-Case Study of Strongly Heterogeneous and Multi-Layer Conglomerate Heavy Oil Reservoir XJ6.SPE EOR Conference at Oil and Gas West Asia, Muscat.doi:10.2118/179791-MS [17] Xiong, Q.H., Wang, Z.Z., Wu, S.H., 2010.Modern Reservoir Geology:The Theory and Technical.Science Press, Beijing, 31-55 (in Chinese). [18] Yang, C.Z., 1999.Chemical Flooding to Enhance Oil Recovery.Petroleum Industry Press, Beijing, 40-56 (in Chinese). [19] Yao, J., Wang, X., Wang, C.C., et al., 2013.The Influence of Carbonate Rocks Reservoir Parameters on Microscopic Flow.Earth Science, 38(5):1047-1052 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQKX201305016.htm [20] Yu, H., Mei, M., Chen, Y.L., 2015.Synthesis of a Polymericparticle.Applied Chemical Industry, 44(5):914-917 (in Chinese with English abstract). [21] 杜荣荣, 刘祥, 2015.反相微乳液聚合制备丙烯酰胺类聚合物微球的研究进展.化工进展, 34(8): 3065-3074. http://www.cnki.com.cn/Article/CJFDTOTAL-HGJZ201508030.htm [22] 韩大匡, 2010.关于高含水油田二次开发理念、对策和技术路线的探讨.石油勘探与开发, 37(5): 583-591. http://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201005011.htm [23] 侯维虹, 2007.聚合物驱油层吸水剖面变化规律.石油勘探与开发, 34(4): 478-482. http://www.cnki.com.cn/Article/CJFDTOTAL-SKYK200704019.htm [24] 贾虎, 倪小龙, 周先云, 等, 2010.聚合物驱油藏适应性研究进展.油气田地面工程, 29(9): 36-38. http://www.cnki.com.cn/Article/CJFDTOTAL-YQTD201009015.htm [25] 李阳, 刘建民, 2007.油藏开发地质学.北京:石油工业出版社, 100-114. [26] 刘朝霞, 王强, 孙盈盈, 等, 2014.聚合物驱矿场应用新技术界限研究与应用.油气地质与采收率, 21(2): 22-24. http://www.cnki.com.cn/Article/CJFDTOTAL-YQCS201402006.htm [27] 马智国, 王永鹤, 康宏元, 等, 2014.一种交联聚合物微球的合成及性能评价.西安石油大学学报(自然科学版), 29(4): 84-88. http://www.cnki.com.cn/Article/CJFDTOTAL-XASY201404016.htm [28] 秦积舜, 李爱芬, 2003.油层物理学.北京:石油大学出版社, 271-273. [29] 石玉江, 潘保芝, 蒋必辞, 等, 2016.小波分析在致密砂岩气层识别中的应用.地球科学, 41(12): 2127-2135. doi: 10.11764/j.issn.1672-1926.2016.12.2127 [30] 师永民, 霍进, 张玉广, 2004.陆相油田开发中后期油藏精细描述.北京:石油工业出版社, 188-206. [31] 熊琦华, 王志章, 吴胜和, 2010.现代油藏地质学:理论与技术篇.北京:科学出版社, 31-55. [32] 杨承志, 1999.化学驱提高石油采收率.北京:石油工业出版社, 40-56. [33] 姚军, 王鑫, 王晨晨, 等, 2013.碳酸盐岩储层参数对微观渗流的影响.地球科学, 38(5): 1047-1052. http://www.earth-science.net/WebPage/Article.aspx?id=2786 [34] 余昊, 梅雪, 陈吟龙, 2015.一种聚合物微球的合成.应用化工, 44(5): 914-917. http://www.cnki.com.cn/Article/CJFDTOTAL-XASY201404016.htm -
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