低渗透油藏渗流物理特征的几点新认识

计秉玉; 赵宇; 宋考平; 许关利

doi:10.11781/sysydz201502129

低渗透油藏渗流物理特征的几点新认识

doi: 10.11781/sysydz201502129

1.
中国石化石油勘探开发研究院, 北京 100083
2. 东北石油大学石油工程学院, 黑龙江大庆 163318

基金项目: 中国博士后科学基金"低渗透油藏CO₂驱替特征及优化开采研究" (2010047050)、国家自然科学基金重点项目"低渗透油层提高驱油效率的机理研究"(50634020)和国家自然科学基金青年科学基金"微观孔隙内原油活化条件的动力学机理研究"(51104030)共同资助。

详细信息

作者简介:
计秉玉(1963—),男,教授级高级工程师,从事油气勘探开发研究。E-mai:jiby.syky@sinopec.com。

中图分类号: TE311
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出版历程
- 收稿日期: 2014-10-20
- 修回日期: 2015-02-25
- 刊出日期: 2015-03-28

New insights into the physical percolation features of low-permeability reservoirs

1.
SINOPEC Petroleum Exploration & Production Research Institute, Beijing 100083, China
2. School of Petroleum Engineering, Northeast Petroleum University, Daqing, Heilongjiang 163318, China

摘要

摘要: 对于低渗透油藏,油水界面张力、岩石润湿性和孔喉比是影响产量和采收率的重要因素,而润湿指数和润湿角通过毛管数与驱油效率有直接的定量关系。该文提出了一个关联着界面张力、润湿性和孔喉比的修正毛管数概念,建立了基于Amott润湿指数与USBM指数的润湿角表征方法,继而推导出低渗透储层毛管数表达式,并通过岩心实验确定出其与残余油饱和度的关系。以此为基础给出不同界面张力与润湿情况下的相对渗透率曲线、驱油效率和注入能力的计算公式,揭示了各种油藏物理参数之间的关联性,为优化低渗透油层化学驱改变界面张力、润湿性控制参数,进而为提高驱油效率和采收率提供了理论依据。
- 毛管数 /
- 润湿角 /
- 界面张力 /
- 相对渗透率 /
- 驱油效率 /
- 低渗透储层
Abstract: For low-permeability reservoirs, interfacial tension, rock wettability and pore-throat ratio are important factors affecting production and recovery. Wettability index and wetting angle have a direct quantitative relationship with oil displacement efficiency. This paper presents a concept of modified capillary number associated with interfacial tension, rock wettability and pore-throat ratio, and establishes a wetting angle characterization method of low-permeability reservoir based on Amott wettability index and USBM index. We also derive a capillary number expression for low-permeability reservoirs and determine the relationship with residual oil saturation through core test. Based on this, the calculation formulas of a relative permeability curve, oil displacement efficiency and injection ability are given for different conditions of interfacial tension and wetting angle, which reveals the relationship between reservoir physical characteristics. The study provides a theoretical basis for optimizing chemical flooding, changing interfacial tension and wettability controlling parameters in low-permeability reservoir, and further improves oil displacement efficiency and recovery.
- capillary number /
- wetting angle /
- interfacial tension /
- relative permeability /
- displacement efficiency /
- low-permeability reservoir

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参考文献(23)

[1]	李华斌.不同润湿性条件下适合于不同渗透率油层的超低界面张力驱油体系[J].石油学报,2008,29(4):573-576.Li Huabin.Oil-displacement system with ultra-low interfacial tension for reservoirs of different permeability under different wettability on rock surface[J].Acta Petrolei Sinica,2008,29(4):573-576.
[2]	秦积舜,李爱芬.油层物理学[M].东营:石油大学出版社,2004:247-255.Qin Jishun,Li Aifen.Reservoir physics[M].Dongying:Petroleum University Press,2004:247-255.
[3]	佳布D,唐纳森E C.油层物理[M].沈平平,秦积舜,译.北京:石油工业出版社,2007:216-256.Jebbartiab D,Donaldson E C.Reservoir physics[M].Shen Pingping,Qin Jishun,translated.Beijing:Petroleum Industry Press,2007:216-256.
[4]	李劲峰,曲志浩,孔令荣.贾敏效应对低渗透油层有不可忽视的影响[J].石油勘探与开发,1999,26(2):93-94.Li Jingfeng,Qu Zhihao,Kong Lingrong.The obvious influence of Jamin effect on lowpermeability reservoirs[J].Petroleum Exploration and Development,1999,26(2):93-94.
[5]	王瑞飞,沈平平,宋子齐,等.特低渗透砂岩油藏储层微观孔喉特征[J].石油学报,2009,30(4):560-563,569.Wang Ruifei,Shen Pingping,Song Ziqi,et al.Characteristics of micro-pore throat in ultra-low permeability sandstone reservoir[J].Acta Petrolei Sinica,2009,30(4):560-563,569.
[6]	张学文,尹家宏.低渗透砂岩油藏油水相对渗透率曲线特征[J].特种油气藏,1999,6(2):27-31.Zhang Xuewen,Yin Jiahong.Features of oil water relative permeability curves for low permeability sandstone reservoir[J].Special Oil & Gas Reservoirs,1999,6(2):27-31.
[7]	尹洪军,张欢欢,杨春城,等.低渗透油藏预测模型和水驱曲线联解法及应用[J].特种油气藏,2013,20(6):66-68.Yin Hongjun,Zhang Huanhuan,Yang Chuncheng,et al.Low permeability reservoir forecasting model and water drive curve method and its application[J].Special Oil & Gas Reservoirs,2013,20(6):66-68.
[8]	韩永林,刘军锋,余永进,等.致密油藏储层驱替特征及开发效果:以鄂尔多斯盆地上里塬地区延长组长7油层组为例[J].石油与天然气地质,2014,35(2):207-211.Han Yonglin,Liu Junfeng,Yu Yongjin,et al.Displacement cha-racteristics and development effect of tight oil reservoir:a case from Chang 7 oil layer of the Yanchang Formation in Shangliyuan area,Ordos Basin[J].Oil & Gas Geology,2014,35(2):207-211.
[9]	吴志宏,牟伯中,王修林,等.油藏润湿性及其测定方法[J].油田化学,2001,18(1):90-96.Wu Zhihong,Mu Bozhong,Wang Xiulin,et al.Reservoir wettability and its measurement[J].Oilfield Chemistry,2001,18(1):90-96.
[10]	曹立迎,孙建芳,徐婷,等.碳酸盐岩油藏岩石润湿性评价实验研究[J].油气地质与采收率,2014,21(4):89-92.Cao Liying,Sun Jianfang,Xu Ting,et al.Experimental study of wettability evaluation on carbonate reservoir rock[J].Petroleum Geology and Recovery Efficiency,2014,21(4):89-92.
[11]	孙仁远,马自超,张建山,等.蒸汽驱对低渗透稠油油藏岩心润湿性的影响[J].特种油气藏,2013,20(6):69-71.Sun Renyuan,Ma Zichao,Zhang Jianshan,et al.Steam flooding for low permeability heavy oil reservoir wettability cores[J].Special Oil & Gas Reservoirs,2013,20(6):69-71.
[12]	Tweheyo M T,Holt T,Tors ter O.An experimental study of the relationship between wettability and oil production characteristics[J].Journal of Petroleum Science and Engineering,1999,24(2/4):179-188.
[13]	Kowalewski E,Holt T,Torsaeter O.Wettability alterations due to an oil soluble additive[J].Journal of Petroleum Science and Engineering,2002,33(1/3):19-28.
[14]	Benkreira H. Experimental study of dynamic wetting in reverse-roll coating[J].AIChE Journal,2002,48(2):221-226.
[15]	Ghosh B,Li X.Effect of surfactant composition on reservoir wettability and scale inhibitor squeeze lifetime in oil wet carbonate reservoir[J].Journal of Petroleum Science and Engineering,2013,108:250-258.
[16]	戚连庆,刘宗昭,杨承志,等.毛管数实验曲线再研究[J].大庆石油地质与开发,2009,28(6):247-251. Qi Lianqing,Liu Zongzhao,Yang Chengzhi,et al.Deep research on the experimental curve of capillary number[J].Petroleum Geology & Oilfield Development in Daqing,2009,28(6):247-251.
[17]	纪淑红,田昌炳,石成方,等.高含水阶段重新认识水驱油效率[J].石油勘探与开发,2012,39(3):338-345. Ji Shuhong,Tian Changbing,Shi Chengfang,et al.New understanding on water-oil displacement efficiency in a high water-cut stage[J].Petroleum Exploration and Development,2012,39(3):338-345.
[18]	何文祥,马清,马超亚.特低渗透储层渗流特征和影响因素[J].科技导报,2011,29(1):36-39. He Wenxiang,Ma Qing,Ma Chaoya.Seepage characteristics and influencing factors in ultra-low permeability reservoirs[J].Science & Technology Review,2011,29(1):36-39.
[19]	Thomas S.Enhanced oil recovery-An overview[J].Oil and Gas Science and Technology,2008,63(1):9-19.
[20]	Melrose J C.Role of capillary forces in detennining microscopic displacement efficiency for oil recovery by waterflooding[J].Journal of Canadian Petroleum Technology,1974,13(4):54-62.
[21]	杨承志,韩大匡,王德辰.一种新型添加剂在玉门油田化学驱先导性试验中的应用[J].石油学报,1995,16(2):77-84. Yang Chengzhi,Han Dakuang,Wang Decheng.The application of a new additive in the pilot chemical flooding project in Yumen oil field[J].Acta Petrolei Sinica,1995,16(2):77-84.
[22]	孙琳,田园嫒,蒲万芬,等.高温低渗油藏表面活性剂驱影响因素研究[J].油田化学,2013,30(2):216-220. Sun Lin,Tian Yuanyuan,Pu Wanfen,et al.Study on the influence factors of surfactant flooding in high-temperature low-permeability reservoir[J].Oilfield Chemistry,2013,30(2):216-220.
[23]	宋新旺,张立娟,曹绪龙,等.润湿性对油水渗流特性的影响[J].大庆石油地质与开发,2009,28(3):66-69. Song Xinwang,Zhang Lijuan,Cao Xulong,et al.Effects of wettability on oil-water flow characteristics[J].Petroleum Geology & Oilfield Development in Daqing,2009,28(3):66-69.