针对常规钻井液降滤失剂耐高温性能不足的缺点,以玉米淀粉为原料,以三偏磷酸钠为交联剂,采用交联反应的方法,合成了一种耐高温的交联淀粉钻井液降滤失剂,并采用六速旋转黏度计、泥浆失水测定仪等设备评价其性能。实验结果表明:采用三偏磷酸钠为交联剂制备的交联淀粉具有良好的耐温性能,当钻井液中交联淀粉质量分数为1.5%时,在160 ℃的条件下仍具有较好的降滤失性能,API滤失量为11.0 mL,黏度为33.5 mPa·s,与羧甲基淀粉降滤失剂相比,该降滤失剂抗高温效果明显,且不增黏。在西南油田元坝区块某评价井应用结果表明,在150 ℃条件下有效降低了钻井液的滤失量,同时控制了钻井液黏度,提高了钻井液整体耐温性能,现场应用效果良好。该研究成果对交联淀粉钻井液降滤失剂的制备具有一定的参考价值。
In view of the poor high-temperature tolerance of conventional filtrate reducers for drilling fluid, a cross-linked starch as filtrate reducer with high temperature tolerance for drilling fluid was synthesized by cross-linking reaction method with corn starch taken as raw material and sodium trimetaphosphate as cross-linking agent. As found in the test results, the cross-linked starch prepared by using sodium trimetaphosphate as the cross-linking agent was highly tolerant to temperature; when the mass fraction of cross-linked starch in the drilling fluid was 1.5%, it was still effective in filtrate loss reduction at 160 ℃, with an API filtrate loss of 11.0 mL and a viscosity of 33.5 mPa·s; compared with carboxymethyl starch used as filtrate reducer, this filtrate reducer was distinctly effective in high temperature tolerance without viscosity increase. The results of its application on an appraisal well in Yuanba Block of Southwest Oilfield showed that it effectively reduced the filtrate loss of drilling fluid at 150 ℃, and at the same time controlled the drilling fluid viscosity and improved the overall temperature tolerance of the drilling fluid. The field application effect was excellent. The results of the study can serve as references for the preparation of cross-linked starch as filtrate reducer for drilling fluid.
[1] 刘震寰.超高密度高温钻井液体系与流变性调控机理研究[D].东营:中国石油大学(华东),2008.
LIU Zhenhuan.Study on ultra-high density high temperature drilling fluid and rheology control mechanism[D].Dongying:China University of Petroleum(East China),2008.
[2] 王中华.2009—2011年国内钻井液处理剂研究与应用进展[J].中外能源,2011,16(3):42-51.
WANG Zhonghua.Research and application progress of the drilling fluid additives in China Between 2009 and 2011[J].Sino-Global Energy,2011,16(3):42-51.
[3] 杨小华.国内近五年钻井液处理剂研究与应用进展[J].油田化学,2009,26(2):210-217.
YANG Xiaohua.Advances in preparation and uses of drilling fluid additives in China in recent 5 years[J].Oilfield Chemistry,2009,26(2):210-217.
[4] 鄢捷年.钻井液工艺学[M].东营:中国石油大学出版社,2001:22-31.
YAN Jienian.Drilling Fluids Technology[M].Dongying:China University of Petroleum Press,2001:22-31.
[5] 陈德军,雒和敏,铁成军,等.钻井液降滤失剂研究述论[J].油田化学,2013,30(2):295-297.
CHEN Dejun,LUO Hemin,TIE Chengjun,et al.Summary on fluid loss additive used for drilling fluids[J].Oilfield Chemistry,2013,30(2):295-297.
[6] 魏君,于洪江,贺建飞,等.交联羧甲基淀粉降滤失剂的制备与性能评价[J].油田化学,2018,35(1):15-15.
WEI Jun,YU Hongjiang,HE Jianfei,et al.Preparation and performance evaluation of cross-linked carboxymethyl starch filtrate reducer[J].Oilfield Chemistry,2018,35(1):15-15.
[7] 张可喜,汪志芬.淀粉的改性及其应用[M].海口:南海出版公司,2008:30-73.
ZHANG Kexi,WANG Zhifen.Modification of starch and its application[M].Haikou:Nan Hai Publishing Co., Ltd,2008:30-73.
[8] 陈馥,罗先波,熊俊杰.一种改性淀粉钻井液降滤失剂的合成与性能评价[J].应用化工,2011,40(5):850-852.
CHEN Fu,LUO Xianbo,XIONG Junjie.Synthesis and function evaluation of modified starch drilling fluid loss additive[J].Applied Chemical Industry,2011,40(5):850-852.
[9] 汪秀丽,张玉荣,王玉忠.淀粉基高分子材料的研究进展[J].高分子学报,2011(1):24-37.
WANG Xiuli,ZHANG Yurong,WANG Yuzhong.Recent progress in starch-based polymeric materials[J].Acta Polymerica Sinica,2011(1):24-37.
[10] 倪海明,柳春,罗想平,等.交联淀粉研究进展[J].大众科技,2015,17(3):71-76.
NI Haiming,LIU Chun,LUO Xiangping,et al.The research progress of cross-linked starch[J].Popular Science & Technology,2015,17(3):71-76.
[11] 刘族安,刘培玲,王潇,等.甲醛交联高温溶胀法制备非晶态颗粒态玉米淀粉[J].食品科技,2010,35(1):175-178.
LIU Zu'an,LIU Peiling,WANG Xiao,et al.Preparation of non-crystalline granular core starch by cross-linking with formaldehyde[J].Food Science and Technology,2010,35(1):175-178.
辽公网安备 21110002000031号 辽ICP备18011648号-1
