针对常规笼统控水技术会对油层造成二次伤害的缺点,采用水溶液聚合的方法合成了控水用热敏暂堵剂,提出二次暂堵工艺,并进行了矿场应用。通过室内实验对热敏暂堵剂进行了配方优选和性能评价,优化后的配方为：（6%~8%）丙烯酰胺+（0.08%~0.12%）过硫酸铵+（1.5%~2.0%）海泡石+（0.5%~0.8%）聚乙二醇二丙烯酸酯。该材料适用地层温度为70~90 ℃,暂堵强度高（5~40 kPa）,降解时间可控（1~15 d）,降解后流体黏度小于100 mPa·s且模拟岩心渗透率恢复值大于95%。基于研究成果,采用二次暂堵工艺对冀东油田1口水平井开展了热敏暂堵笼统控水技术的矿场应用,该井经处理后含水率降低至27%,目前含水率67%,日增油4.8 t,累计增油量达750 t,控水增油效果较好。图9表3参11
Aimed at the disadvantages of secondary damage to oil layers caused by the conventional bull-heading water control technique, a thermo-sensitive temporary plugging agent for water control was synthesized by water solution polymerization and applied in the field with a new secondary temporary plugging technique. The optimization and performance evaluation of thermo-sensitive temporary plugging agent were carried out through laboratory experiments. The optimized formula is as follows: (6% - 8%) acrylamide + (0.08% - 0.12%) ammonium persulfate + (1.5% - 2.0%) sepiolite + (0.5% - 0.8%) polyethylene glycol diacrylate. The thermo-sensitive temporary plugging agent is suitable for formation temperatures of 70-90 ℃, it has high temporary plugging strength (5-40 kPa), controllable degradation time (1-15 d), the apparent viscosity after degradation of less than 100 mPa•S and the permeability recovery value of simulated cores of more than 95%. Based on the research results, secondary temporary plugging technique was used in a horizontal well in the Jidong Oilfield. After treatment, the well saw a drop of water cut to 27%, and now it has a water cut of 67%, its daily increased oil production was 4.8 t, and the cumulative oil increment was 750 t, demonstrating that the technique worked well in controlling water production and increasing oil production.
[1] 孙昕迪, 白宝君. 国内外水平井控水技术研究现状[J]. 石油勘探与开发, 2017, 44(6): 967-973.
SUN Xindi, BAI Baojun.Comprehensive review of water shutoff methods for horizontal wells[J]. Petroleum Exploration and Development, 2017, 44(6): 967-973.
[2] 李克华, 王任芳, 郑延成, 等. 新型水溶性暂堵剂SZD的研究与应用[J]. 石油天然气学报, 2008, 30(3): 147-149.
LI Kehua, WANG Renfang, ZHENG Yancheng, et al.Investigation and application of water soluble temporary plugging agent SZD[J]. Journal of Oil and Gas Technology, 2008, 30(3): 147-149.
[3] 成梅华. 水溶性暂堵剂的研究与应用[J]. 石油化工应用, 2015, 34(4): 91-93.
CHENG Meihua.Investigation and application of water soluble temporary plugging agent[J]. Petrochemical Industry Application, 2015, 34(4): 91-93.
[4] 王学忠, 杨元亮, 席伟军. 油水过渡带薄浅层特稠油微生物开发技术: 以准噶尔盆地西缘春风油田为例[J]. 石油勘探与开发, 2016, 43(4): 630-635.
WANG Xuezhong, YANG Yuanliang, XI Weijun.Microbial enhanced oil recovery of oil-water transitional zone in thin-shallow extra heavy oil reservoirs: A case study of Chunfeng Oilfield in western margin of Junggar Basin, NW China[J]. Petroleum Exploration and Development, 2016, 43(4): 630-635.
[5] WANG S, LI Y, FEI X, et al.Preparation of a durable superhydrophobic membrane by electrospinning poly (vinylidene fluoride) (PVDF) mixed with epoxy-siloxane modified SiO2 nanoparticles: A possible route to superhydrophobic surfaces with low water sliding angle and high water contact angle[J]. Journal of Colloid and Interface Science, 2011, 359(2): 380-388.
[6] CHO K H, CHEN L J.Fabrication of sticky and slippery superhydrophobic surfaces via spin-coating silica nanoparticles onto flat/patterned substrates[J]. Nanotechnology, 2011, 22(44): 445706.
[7] KARUNAKARAN R G, LU C H, ZHANG Z, et al.Highly transparent superhydrophobic surfaces from the coassembly of nanoparticles (≤100 nm)[J]. Langmuir, 2011, 27(8): 4594-4602.
[8] 王伟吉, 邱正松, 黄维安, 等. 纳米聚合物微球封堵剂的制备及特性[J]. 钻井液与完井液, 2016, 33(1): 33-36.
WANG Weiji, QIU Zhengsong, HUANG Weian, et al.Preparation and characteristics of nano polymer microspheres used as plugging agent in drilling fluid[J]. Drilling Fluid and Completion Fluid, 2016, 33(1): 33-36.
[9] 兰玉波, 杨清彦, 李斌会. 聚合物驱波及系数和驱油效率实验研究[J]. 石油学报, 2006, 27(1): 64-68.
LAN Yubo, YANG Qingyan, LI Binhui.Experimental research on sweep efficiency and oil displacement efficiency of polymer flooding[J]. Acta Petrolei Sinica, 2006, 27(1): 64-68.
[10] 许长福, 刘红现, 钱根宝, 等. 克拉玛依砾岩储集层微观水驱油机理[J]. 石油勘探与开发, 2011, 38(6): 725-732.
XU Changfu, LIU Hongxian, QIAN Genbao, et al.Microcosmic mechanisms of water-oil displacement in conglomerate reservoirs in Karamay Oilfield, NW China[J]. Petroleum Exploration and Development, 2011, 38(6): 725-732.
[11] 卢祥国, 王树霞, 王荣健, 等. 深部液流转向剂与油藏适应性研究: 以大庆喇嘛甸油田为例[J]. 石油勘探与开发, 2011, 38(5): 576-582.
LU Xiangguo, WANG Shuxia, WANG Rongjian, et al.Adaptability of a deep profile control agent to reservoirs: Taking the Lamadian Oilfield in Daqing as an example[J]. Petroleum Exploration and Development, 2011, 38(5): 576-582.
