Performance Evaluation and Field Application of a Novel Water Lock Reducing Flushing Fluid NDF-1
-
摘要: 针对鄂尔多斯盆地低渗透含油气砂岩储层水锁现象普遍,严重影响油气藏动用程度并使采收率降低的问题,通过分析影响水锁效应的因素,从降低水锁程度的角度出发,选用解水锁剂、抑制剂、防水锁表面活性剂、耐高温缓蚀剂等配制成一种新型降水锁洗井液NDF-1,对其性能进行了评价,结果表明:降水锁洗井液NDF-1能够使油水界面张力降至20 mN／m以下;岩石平均润湿角由21.6°增至78.6°;与清水相比,该洗井液能使井下管柱样品6 h和24 h的腐蚀速率分别下降89.9%和84.7%;经钻井液和完井液污染的岩心,用降水锁洗井液NDF-1冲洗后,渗透率恢复到原来的182.14%。该洗井液在鄂尔多斯盆地的CBx-c井进行了现场试验,该井采用降水锁洗井液NDF-1洗井后,产量达到原来的185.7%。室内试验及现场试验表明,降水锁洗井液NDF-1能降低低渗透油气藏的水锁效应,提高油气井的产量。Abstract: In the Ordos Basin, water lock is common in low-permeability oil and gas bearing sandstone reservoirs, and it has serious effect on oil and gas reservoir producing degree and decreases the recovery rate. After analysis was performed on the factors influencing water lock effect, a novel water lock reducing flushing fluid NDF-1 was prepared with a water lock removal agent, inhibitor, anti-water lock surfactant and high-temperature corrosion inhibitor, so as to reduce water locking degree. After its performance evaluation was completed, the flushing fluid NDF-1 was field tested in Well CBx-c in the Ordos Basin. According to the performance evaluation, the oil/water interfacial tension dropped below 20 mN/m and the average rock wetting angle increased from 21.6° to 78.6°. The corrosion rate dropped by 89.9% and 84.7%(compared with fresh water) respectively after the downhole string samples were soaked in NDF-1 for 6 hours and 24 hours. After the core contaminated by drilling fluids and completion fluids was cleaned out by NDF-1, its permeability recovered to 182.14%. Field tests demonstrated that the gas production of Well CBx-c increased to 185.7% after it was cleaned out by NDF-1. In summary, the waterlock reducing flushing fluid NDF-1 could effectively efficiently the water lock effect in low-permeability reservoirs and increase the production rate of oil and gas wells.
-
Keywords:
- low permeability reservoir /
- waterlock /
- capillary pressure /
- well cleanout /
- Well CBx-c
-
-
[1] 蒋官澄,王晓军,关键,等.低渗特低渗储层水锁损害定量预测方法[J].石油钻探技术,2012,40(1):69-73. Jiang Guancheng,Wang Xiaojun,Guan Jian,et al.The quantitative prediction method of water blocking damage in low and extra-low permeability reservoir[J].Petroleum Drilling Techniques,2012,40(1):69-73. [2] 卜彩霞,林丽娜,王永恒.积液倒灌和水锁效应对气井生产的危害[J].天然气与石油,2011,29(5):53-56,105. Bu Caixia,Lin Lina,Wang Yongheng.Damage of fluid intrusion and water lock effect on gas well production[J].Natural Gas and Oil,2011,29(5):53-56,105. [3] 张大椿,周理志,袁学芳,等.凝析气藏的液相伤害与防治[J].断块油气田,2008,15(4):8-11. Zhang Dachun,Zhou Lizhi,Yuan Xuefang,et al.Study on damage and prevention of liquid phase in gas condensate reservoirs[J].Fault-Block Oil Gas Field,2008,15(4):8-11. [4] 杨俊杰,裴锡古.中国天然气地质学:卷四:鄂尔多斯盆地[M].北京:石油工业出版社,1996:4-8. Yang Junjie,Pei Xigu.China natural gas geology:volume four:Ordos Basin[M].Beijing:Petroleum Industry Press,1996:4-8. [5] 周进松,王念喜,赵谦平,等.鄂尔多斯盆地上古生界砂岩储层特征及控制因素分析[J].石油天然气学报,2014,36(2):27-33. Zhou Jinsong,Wang Nianxi,Zhao Qianping,et al.Analysis on controlling and sandstone reservoir characteristics of the upper Paleozoic in Ordos Basin[J].Journal of Oil and Gas Technology,2014,36(2):27-33. [6] 张琰,崔迎春.低渗气藏主要损害机理及保护方法的研究[J].地质与勘探,2000,36(5):76-78. Zhang Yan,Cui Yingchun.Investigation on the mechanism and prevention of formation damage of low-permeability gas reservoir[J].Geology and Exploration,2000,36(5):76-78. [7] 唐海,吕渐江,吕栋梁,等.致密低渗气藏水锁影响因素研究[J].西南石油大学学报:自然科学版,2009,31(4):91-94. Tang Hai,Lv Jianjiang,Lv Dongliang,et al.Study on influencing factors of water blocking effect on tight gas reservoir[J].Journal of Southwest Petroleum University:Science Technology Edition,2009,31(4):91-94. [8] 樊世忠.天然气藏的损害机遇,评价方法及保护措施:一[J].低渗透油气田,1999,4(1):58-63. Fan Shizhong.The damage opportunities,the evaluation method and the protection measures of the tas accumulation:1[J].Low Permeability Oil and Gas Field,1999,4(1):58-63. [9] 贺承祖,华明琪.油气藏物理化学[M].成都:电子科技大学出版社,1995:34-37. He Chengzu,Hua Mingqi.Reservoir physical chemistry[M].Chengdu:University of Electronic Science Technology of China Press,1995:34-37. [10] Kleelan D K,Koepf E H.The role of cores and core analysis in evaluation of formation damage[J].Journal of Petroleum Technology,1977,29(5):482-490.
[11] 贺承祖,华明琪.水锁机理的定量研究[J].钻井液与完井液,2000,17(3):4-7. He Chengzu,Hua Mingqi.The quantitative study on water blocking mechanism[J].Drilling Fluid Completion Fluid,2000,17(3):4-7. [12] 廖锐全,徐永高,胡雪滨.水锁效应对低渗透储层的损害及抑制和解除方法[J].天然气工业,2002,22(6):87-89. Liao Ruiquan,Xu Yonggao,Hu Xuebin.Damage to low-permeability reservoir by water locking effect and its-hibiting and removing methods[J].Natural Gas Industry,2002,22(6):87-89. [13] 罗玉祥,王海鹏,刘超卓,等.原油界面张力系数与温度关系的实验研究[J].科学技术与工程,2009,9(13):3758-3761. Luo Yuxiang,Wang Haipeng,Liu Chaozhuo,et al.Experimental study on variation of interfacial tension coefficient of crude oil with temperature[J].Science Technology and Engineering,2009,9(13):3758-3761. [14] 钟新荣,黄雷,王利华.低渗透气藏水锁效应研究进展[J].特种油气藏,2008,15(6):12-15,23. Zhong Xinrong,Huang Lei,Wang Lihua.Research progress of water lock effect in low permeability gas reservoirs[J].Special Oil Gas Reservoirs,2008,15(6):12-15,23. [15] 胡学军,杨胜来,蒋利平,等.温度对亲水岩心束缚水饱和度的影响[J].油气地质与采收率,2004,11(5):46-48,84. Hu Xuejun,Yang Shenglai,Jiang Liping,et al.The effect of temperature irreducible water saturation of water-wet core[J].Petroleum Geology and Recovery Efficiency,2004,11(5):46-48,84. [16] 张振华,鄢捷年.用灰关联分析法预测低渗砂岩储层的水锁损害[J].石油钻探技术,2001,29(6):51-53. Zhang Zhenhua,Yan Jienian.Using grey relational analysis method to predict low permeability sandstone reservoir water locking damage[J].Petroleum Drilling Techniques,2001,29(6):51-53. [17] 张琰,崔迎春.砂砾性低渗气层水锁效应及减轻方法的试验研究[J].地质与勘探,2000,36(1):91-94. Zhang Yan,Cui Yingchun.Experimental study on the aqueous phase trapping of low-permeability gas sands[J].Geology and Exploration,2000,36(1):91-94. [18] 何芳云,李学军,张坤灵,等.HNCY-2洗井液的研制与应用[J].油田化学,1993,10(2):116-119. He Fangyun,Li Xuejun,Zhang Kunling,et al.Well washing fluid HNCY-2 and its field uses[J].Oilfield Chemistry,1993,10(2):116-119. [19] 宋长生,何媛玲.CT5-4酸化压裂助排剂的研制与现场应用[J].石油与天然气化工,1992,21(4):195-200. Song Changsheng,He Yuanling.The research and field application of the CT5-4 acidizing fracturing drainage aid[J].Chemical Engineering of Oil and Gas,1992,21(4):195-200. [20] 张绪民,马宏斌,郭海韬.S-10(含氟表面活性剂)在油井增产措施中的应用[J].新疆石油科技,1995,5(2):17-25,83. Zhang Xumin,Ma Hongbin,Guo Haitao.S-10(containing fluorine surfactant)application in oil well stimulation[J].Xinjiang Petroleum Science Technology,1995,5(2):17-25,83. [21] 郭彬,王宝锋.新型酸化缓蚀综合添加剂的研制[J].石油钻采工艺,1993,15(6):61-65. Guo Bin,Wang Baofeng.The development of the new acidizing corrosion composite additives[J].Oil Drilling Production Technology,1993,15(6):61-65. [22] 胡月亭,周煜辉,苏义脑,等.水平井水平段长度优化设计方法[J].石油学报,2000,21(4):80-86,124. Hu Yueting,Zhou Yuhui,Su Yinao,et al.Methods of optimal horizontal length of a horizontal well[J].Acta Petrolei Sinica,2000,21(4):80-86,124. -
期刊类型引用(2)
1. 刘钰川, 高飞, 刘崇江, 马强, 张晓静. 苏丹油田高含水井动态可调找堵水技术研究与应用. 采油工程. 2020(01): 37-41+80-81 . 
百度学术
2. 刘欢乐, 付道明, 郑明学, 周明, 任志远. 腐蚀环境下基于井筒完整性与流动保障的完井技术. 大庆石油地质与开发. 2017(03): 83-88 . 百度学术
其他类型引用(0)
计量
- 文章访问数: 2582
- HTML全文浏览量: 121
- PDF下载量: 2642
- 被引次数: 2
下载:
