注入水中悬浮颗粒能够严重堵塞油藏储层, 造成渗透率下降, 导致注水难、采油难。开展悬浮颗粒对储层伤害规律的研究, 对提高油田注水效果有着重要的指导作用。以5 种不同粒径的悬浮颗粒分别在3 种不同浓度溶液条件下, 对天然岩心进行室内流动实验。将粒径与喉道直径之比定义为匹配度, 流出液浓度与注入液浓度之比定义为相对浓度。结果表明:在岩心平均喉道直径0.94 μm、水测渗透率0.137×10-3~0.235×10-3 μm2条件下, 注入悬浮颗粒溶液后, 渗透率变小, 产生了堵塞。其中当匹配度小于0.777 时, 相对浓度大于0, 即部分颗粒能够贯穿岩心, 发生贯穿性堵塞;当匹配度大于0.777 时, 相对浓度为0, 即颗粒无法贯穿岩心, 发生浅部堵塞;在匹配度接近0.777 时, 为由贯穿性堵塞向浅部堵塞过渡阶段, 堵塞最严重。注入量与堵塞程度有较好的线性关系。建议油田在达到配注量的同时, 尽量减小注入水悬浮颗粒浓度, 保证悬浮颗粒粒径范围集中且匹配度远离临界值。
Suspended particles in injected water can seriously plug the reservoir, which makes it hard for the water to be injected and the oil to be produced. In order to solve this problem, the plugging of a reservoir caused by suspended particles should be studied. In this paper, a core plugging experiment is designed, where 3 sizes and 5 concentrations of suspended particles are considered. The ratio of the diameter of the suspended particle to the throat diameter is defined as the compatibility. The ratio of the effluent concentration to the injection concentration is defined as the relative concentration. It is shown that when the throat diameter of the core is 0.94 μm and the water permeability of the core is 0.137~0.235×10-3 μm2, the permeability decreases and the plugging occurs after suspended particles are injected. When the particle compatibility<0.777, the relative concentration>0, a part of suspended particles can go through the core, the form of plugging is penetrable; when the particle compatibility>0.777, the relative concentration is 0, the suspended particles can not go through the core, the form of plugging is a shallow plugging; The particle compatibility 0.777 is the critical value from penetrable plugging to shallow plugging. Under an appropriate particle compatibility value, the pore volume and the plugging degree have a good linear relationship. It is suggested that the concentration should be low, the particle size should be in a limited range and the particle compatibility should be far below the critical value.
[1] 杨正明, 邱勇松, 张训华, 等. 注入水中的悬浮颗粒对特低渗透油藏开 发效果的影响[J]. 石油勘探与开发, 2002, 29(4): 106-108. Yang Zhengming, Qiu Yongsong, Zhang Xunhua, et al. The effect of suspended particles from injected water on the development of super lowpermeability reservoirs[J]. Petrolum Exploration and Development, 2002, 29(4): 106-108.
[2] 李道品. 低渗透砂岩油田开发[M]. 北京: 石油工业出版社, 1997: 99-103. Li Daopin. The development of the low permeability sandstone oil field[M]. Beijing: Pretroleum Industry Press, 1997, 99-103.
[3] 王在刚, 徐勇鹏, 崔福义, 等. 给水处理过程中颗粒特征分析[J]. 中国给 水排水, 2006, 22(17): 51-53. Wang Zaigang, Xu Yongpeng, Cui Fuyi, et al. Analysis on parameters of particles size distribution in drinking water treatment[J]. China Water & Waste Water, 2006, 22(17): 51-53.
[4] 刘泉声, 赵军, 张程远. 考虑尺寸排除效应颗粒迁移模型的建立[J]. 岩 土力学, 2012, 33(8): 2265-2268. Liu Quansheng, Zhao Jun, Zhang Chengyuan. Establishment of particulate transport: Size exclusion effect[J]. Rock and Soil Mechanics, 2012, 33(8): 2265-2268.
[5] Nico Goldscheider, Michiel Pronk, Jakob Zopfi, 等. 沉积物和悬浮颗粒 物在岩溶水系统污染物衰减与运移中的作用[J]. 中国岩溶, 2009, 28 (2): 113-121. Goldscheider N, Pronk M, Zopfi J, et al. Role of sediments and suspended particles for contaminant attenuation and transport in karst aquifer systems[J]. Carsologica Sinica, 2009, 28(2): 113-121.
[6] Utsunomiya S, Kersting A B, Ewing R C. Groundwater nanoparticles in the far-field at the Nevada Test Site:Mechanism for radionuclide transport[J]. Environmental Science and Technology, 2009,43(5): 1293-1298.
[7] Möri A, Alexander W R, Geckeis H, et al. The colloid and radionuclide retardation experiment at the Grimsel Test Site:Influence of bentonite colloids on radionuclide migration in a fractured rock[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2003, 217(1-3): 33-47.
[8] 原晓珠. 冀东油田注水过程中储层保护技术研究[D]. 荆州: 长江大学, 2012. Yuan Xiaozhu. Research on reservoir protection technique during water injection process of Jidong Oilfield[D]. Jingzhou: Yangtze University, 2012.
[9] 万仁薄, 罗英俊. 采油技术手册(第2册)[M]. 北京: 石油工业出版社, 1991: 40-41. Wan Renbo, Luo Yingjun. Production technical manual (Vol 2) [M]. Beijing: Petroleum Industry Press, 1991: 40-41.
[10] 孙丽丽, 侯吉瑞, 赵凤兰, 等. 苏丹油田注水伤害及对策研究[J]. 油田 化学, 2011, 28(2): 137-141. Sun Lili, Hou Jirui, Zhao Fenglan, et al. Sudan oil field injecting water damage and the counter measures[J]. Oilfield Chemistry, 2011, 28(2): 137-141.
[11] 戴达山, 刘开莉, 熊健, 等. 低渗透注水开发油田储层吸水能力研究[J]. 油气田地面工程, 2010, 29(7): 14-16. Dai Dashan, Liu Kaili, Xiong Jian, et al. Study on water absorbing capability of reservoir in water injection development oilfield with lowpermeability[ J]. Oil-Gasfield Surface Engineering, 2010, 29(7): 14-16.
[12] Oluyemi G F. Investigation of depletion induced formation damage mechanisms in fractured reservoirs[C]. SPE European Formation Damage Conference, Noordwijk, The Netherlands, June 7-10, 2011.
[13] 马功联. 河86地区生物灰岩油藏注水水源评价及储层伤害研究[J]. 特种油气藏, 2004, 11(5): 96-100. Ma Gonglian. Injected water source assessment and reservoir damage study on He 86 Biolithite Reservoir [J]. Special Oil & Gas Reservoirs, 2004, 11(5): 96-100.
[14] 李海涛, 王永清, 蒋建勋. 悬浮颗粒对砂岩储层吸水能力影响评价[J]. 西南石油学院学报, 2006, 28(5): 47-49. Li Haitao, Wang Yongqing, Jiang Jianxun. Evaluation of formation damage induced by suspended particles during water injection[J]. Journal of Southwest Petroleum Institute, 2006, 28(5): 47-49.
[15] Bedrikovetsky P, Mackay E J, Rosario F F, et al. Injectivity impairment due to sulfate scaling during PWRI: Analytical model[C]. SPE International Oilfield Scale Symposium, Aberdeen, UK, May 31-June 1, 2006.
[16] Zeinijahromi A, Nguyen P T, Bedrikovetsky P. Taking advantage of fines-migration-induced formation damage for improved waterflooding (reservoir simulation using polymer flood option) [C]. SPE European Formation Damage Conference, Noordwijk, The Netherlands, June 7-10, 2011.
[17] Bedrikovetsky P G, Furtado C G A, de Souza A L V, et al. In-situ erosion of damaged formation during injectivity decline (PWRI and Seawater Flood) [C]. European Formation Damage Conference, Scheveningen, The Netherlands, May 30-June 1, 2007.
[18] 李海涛, 王永清, 谭灿. 砂岩储层清水和污水混注对储层损害的实验 评价[J]. 石油学报, 2007, 28(2): 137-139. Li Haitao, Wang Yongqing, Tan Can. Experimental evaluation on formation damage caused by re-injection of mixture of fresh water and produced water in sandstone reservoir[J]. Acta Petrol Ei Sinica, 2007, 28 (2): 137-139.
[19] 油气田开发专业标准化委员会. SY/T 5329—1994 碎屑岩油藏注水 水质推荐指标及分析方法[S]. 北京: 石油工业出版社, 1995. Oil And Gas Field Development Professional Standardization Committee. SY/T 5329—1994 Clastic reservoir injection water quality indicators and analytical methods recommended[S]. Beijing: Petroleum Industry Press, 1995.
[20] 徐成君. 滤膜过滤法测量水中悬浮物[J]. 油气田地面工程, 2010, 29 (3): 89-90. Xu Chengjun. Suspended substance measurement in the water by membrane filtration method[J]. 2010, 29(3): 89-90.
[21] 王福贵. 油田采出水常规处理工艺出水中颗粒物粒径分布及分析[J]. 特种油气藏, 2006, 13(3): 56-59. Wang Fugui. Particle size distribution and analysis of oilfield produced water treatment process[J]. Special Oil & Gas Reservoirs, 2006, 13(3): 56-59.
[22] Pang S, Sharma M M. Evaluating the performance of open-hole,perforated and fractured water injection wells[C]. SPE European Formation Damage Conference, The Hague, Netherlands, May 15-16, 1995.
[23] Pang S, Sharma M M. A Model for predicting injectivity decline in water inection wells[C]. SPE Formation Evaluation, 1997, 12(3): 194-201.
[24] Wennberg K E, Sharma M M. Determination of the filtration coefficient and the transition time for water injection wells[C]. SPE European Formation Damage Conference, Hague, The Netherlands, June 2-3, 1997.