Synthesis and Evaluation of High Temperature Weak Gel Viscosifier WG-1
-
摘要: 针对高温深井及特殊工艺井对钻井液的要求,采用反相乳液聚合方法研制了抗高温弱凝胶提黏切剂WG-1,考察了影响产品性能的关键因素,确定了最佳合成条件。由红外光谱图和扫描电子显微镜SEM可以看出,WG-1中含有AMPS、DMAM和NVP等基团,呈球状,粒径为0.1~1.8 μm;浓度为1.0%的弱凝胶提黏切剂分散液经200℃老化16 h后,动塑比为0.47 Pa/mPa·s,满足200℃下的提黏度、切力要求;经170℃连续老化72 h后,表观黏度、动切力保持率较好,分别为60%和37%,能满足170℃下高温稳定性要求;且在淡水、饱和盐水钻井液中均具有较好的提黏度、切力能力和降滤失效果,170℃高温老化后,WG-1加量从0.5%增加到1.0%,淡水钻井液API滤失量由9.6 mL降低至4.8 mL;WG-1加量从1.0%增加到1.5%,饱和盐水钻井液API滤失量由8.8 mL降低至3.2 mL,说明研制的提黏切剂能够封堵微裂缝,改善滤饼质量,降低钻井液滤失量。Abstract: A high temperature weak gel viscosifier WG-1 has been developed using inverse emulsion polymerization in an effort to satisfy the needs for high temperature deep wells and non-conventional wells.The optimum synthesis conditions were determined and key factors affecting the performance of WG-1 examined.Groups such as AMPS,DMAM and NVP are found in the molecular structure of WG-1 through SEM observation,and these groups are in spherical forms,with diameters between 0.1 μm and 1.8 μm.These data demonstrate that WG-1 has good thermal stability,salinity tolerance and superior thickening and gelling capacity.A 1.0% WG-1 solution,after aging at 200℃ for 16 h,had YP/PV ratio of 0.47 Pa/mPa·s,suitable for use at that temperature as a viscosifier and gelling agent.WG-1 solution retained enough viscosity and gel strengths after aging for 72 h at 170℃,meaning that it suffices the needs for operation at 170℃.WG-1 can be used in both fresh water and saltwater drilling fluids as viscosifier and filter loss reducer.After aging at 170℃,the filtration rate of fresh water base drilling fluid was reduced from 9.6 mL to 4.8 mL,and that of saturated water base drilling reduced from 8.8 mL to 3.2 mL,indicating that WG-1 can plug micro fractures and improve the quality of mud cakes,thereby reduce the filtration rate.
-
王中华. 国内外钻井液技术进展及对钻井液的有关认识[J]. 中外能源, 2011, 16(1):48-60. WANG Zhonghua.Advances on drilling fluid technology and understanding of the relevant fluid at home and broad[J].Sino-Global Energy, 2011, 16(1):48-60. 任学军. 无土相水平井钻井液体系的开发[J]. 华北科技学院学报, 2005, 2(2):55-58. REN Xuejun.The study of horizontal well drilling fluids[J].Journal of North China Institute of Science and Technology, 2005, 2(2):55-58. 张洁, 孙金生, 杨枝, 等. 抗高温无固相钻井液研究[J]. 石油钻采工艺, 2011, 33(4):45-47. ZHANG Jie, SUN Jinsheng, YANG Zhi, et al. A solid free drilling fluid with high temperature resistance[J]. Oil Drilling & Production Technology, 2011, 33(4):45-47. 郑锋辉, 薛玉志, 刘宝锋, 等. 无黏土相钻井液及生物完井液在DF2井的应用[J]. 油田化学,2008,25(4):302-304. ZHENG Fenghui, XUE Yuzhi, LIU Baofeng, et al. Non-bentonite drilling fluid and biologic completion fluid used in well DF2[J].Oilfield Chemistry, 2008, 25(4):302-304. 吕开河, 杨鹏, 李建成, 等. 抗高温无黏土相钻井液体系研究与性能评价[J]. 石油钻探技术, 2012, 40(5):30-34. LYU Kaihe, YANG Peng, LI Jiancheng, et al. Research and evaluation of clay-free drillyng fluids with high temperature resistance[J]. Petroleum Drilling Techniques, 2012, 40(5):30-34. 苏雪霞, 孙举, 郑志军, 等. 氯化钙弱凝胶无黏土相钻井液室内研究[J]. 钻井液与完井液, 2014, 31(3):10-13. SU Xuexia, SUN Ju, ZHENG Zhijun, et al. Study on weak gel clay-free CaCl2 drilling fluid[J]. Drilling Fluid & Completion Fluid, 2014, 31(3):10-13. 万芬, 王昌军. 抗高温无黏土相钻井液体系研究[J]. 石油天然气学报, 2014, 36(4):140-142. WAN Fen, WANG Changjun.Study on a hightemperature resistant and clay free drilling fluid[J].Journal of Oil and Gas Technology, 2014, 36(4):140-142. 杨鹏, 吕开河, 甄鹏鹏, 等. 抗高温饱和盐水无黏土相钻井液体系室内研究[J]. 油田化学, 2013, 30(4):482-485. YANG Peng, LYU Kaihe, ZHEN Pengpeng, et al. Labotoray research on saturated salt water based clayfree drilling flulds with high thermal stability[J].Oil Chemistry, 2013, 30(4):482-485. 王中华. 钻井液用超支化反相乳液聚合物的合成及其性能[J]. 钻井液与完井液, 2014, 31(3):14-18. WANG Zhonghua.Property of hyperbranched polymer synthesized through inverse emulsion polymerization[J]. Drilling Fluid & Completion Fluid, 2014, 31(3):14-18. 李建国, 崔应中, 邢希金, 等. 抗高温无黏土相钻井液体系研究[J]. 钻井液与完井液, 2012, 29(2):35-38. LI Jianguo, CUI Yingzhong, XING Xijin, et al.Study on clay-free high temperature drilling fluid[J].Drilling Fluid & Completion Fluid, 2012, 29(2):35-38. 黄宁, 张麒麟, 甄剑武, 等. 无土相硅酸盐-烷基葡萄糖苷钻井液[J]. 钻井液与完井液, 2014, 31(2):13-16. HUANG Ning, ZHANG Qilin, ZHEN Jianwu, et al. Study on clay-free silicate-alkyl polyglucoside drilling fluid[J]. Drilling Fluid & Completion Fluid,2014,31(2):13-16. 谢水祥, 蒋官澄, 陈勉, 等. 凝胶型钻井液提黏切剂性能评价与作用机理[J]. 石油钻采工艺, 2011, 33(4):48-51. XIE Shuixiang, JIANG Guancheng, CHEN Mian, et al. Evaluation and mechanism of gel shear strength improving agent for drilling fluid[J].Oil Drilling & Production Technology, 2011, 33(4):48-51.
点击查看大图
计量
- 文章访问数: 596
- HTML全文浏览量: 106
- PDF下载量: 192
- 被引次数: 0