强抑制强封堵深水钻井液的制备与性能评价
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摘要
针对深水钻井中钻井液黏土水化抑制性和封堵性能不足、低温流变性差等问题,以烯丙基磺酸钠(AS)、三羟乙基烯丙基溴化铵(THAAB)和甲基丙烯酸甲酯(MMA)为原料制得多羟基低聚物黏土水化抑制剂PDWC。在常规水基钻井液中加入10%KCl和0.7%PDWC,得到密度为1.1 g/cm~3的强抑制强封堵深水钻井液体系。通过红外光谱仪、热重分析仪和凝胶色谱法表征了PDWC的结构,研究了强抑制强封堵深水钻井液的封堵性、润滑性和抗温抗盐性。结果表明,PDWC的相对分子质量为2.2×10~4,抗温可达280℃,强抑制强封堵深水钻井液体系具有良好的抑制和封堵性能。红土滚动回收率高达93.5%,人造岩心在滤液中的常温常压线性膨胀高度仅为1.7 mm。在0.69 MPa的条件下,钻井液在模拟砂床中侵入30 min后的深度为4 cm。钻井液的抗温和抗盐能力较好,其低温流变性和润滑性能良好,满足深水钻井工程需要。图6表5参14
In order to solve the shortcomings of deepwater drilling fluid such as the low degree of hydration inhibition,poor performance of plugging and low temperature rheology,a polyhydroxy oligomer clay hydration inhibitor PDWC was prepared by sodium allyl sulfonate(AS),three hydroxyethyl allyl ammonium bromide(THAAB)and methyl methacrylate(MMA)as raw materials. A high inhibitive and plugging deepwater drilling fluid with the density of 1.1 g/cm~3 was developed by adding 10% KCl and 0.7% PDWC to the conventional water-based drilling fluid. The structure of PDWC was characterized by infrared spectrometer,thermogravimetric analyzer and gel permeation chromatography,and the plugging,lubricity,temperature resistance and salt resistance of strong plugging inhibitive deepwater drilling fluid were studied. The results showed that the relative molecular mass of PDWC was 2.2×10~4,the temperature resistance ability of PDWC was up to 280℃. The deepwater drilling fluid system had good inhibition and plugging performance. The system's clay recovery rate reached as high as 93.5% and artificial core's room temperature and pressure linear expansion height was only 1.7 mm. The intrusion depth of drilling fluid in simulated sand bed was only 4 cm after intruding 30 min at 0.69 MPa. The drilling fluid had nice temperature and salt resistance performance,low temperature rheology and good lubrication performance,which met the needs of deepwater drilling engineering.
In order to solve the shortcomings of deepwater drilling fluid such as the low degree of hydration inhibition,poor performance of plugging and low temperature rheology,a polyhydroxy oligomer clay hydration inhibitor PDWC was prepared by sodium allyl sulfonate(AS),three hydroxyethyl allyl ammonium bromide(THAAB)and methyl methacrylate(MMA)as raw materials. A high inhibitive and plugging deepwater drilling fluid with the density of 1.1 g/cm~3 was developed by adding 10% KCl and 0.7% PDWC to the conventional water-based drilling fluid. The structure of PDWC was characterized by infrared spectrometer,thermogravimetric analyzer and gel permeation chromatography,and the plugging,lubricity,temperature resistance and salt resistance of strong plugging inhibitive deepwater drilling fluid were studied. The results showed that the relative molecular mass of PDWC was 2.2×10~4,the temperature resistance ability of PDWC was up to 280℃. The deepwater drilling fluid system had good inhibition and plugging performance. The system's clay recovery rate reached as high as 93.5% and artificial core's room temperature and pressure linear expansion height was only 1.7 mm. The intrusion depth of drilling fluid in simulated sand bed was only 4 cm after intruding 30 min at 0.69 MPa. The drilling fluid had nice temperature and salt resistance performance,low temperature rheology and good lubrication performance,which met the needs of deepwater drilling engineering.
引文
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[2]李怀科,张伟,马跃.深水窄密度窗口钻井液技术改进及现场应用[J].油田化学,2018,35(2):209-213.
[3]林家昱,谢涛,王晓鹏,等.胺基硅醇JFC钻井液在渤海油田的应用研究[J].天然气与石油,2018,36(6):65-70.
[4]ZHANG Jun,AI Chi,ZENG Bo,et al.Study on wellbore stability of shallow sediments in deepwater drilling[J].Open Pet Eng J,2017,10(1):48-63.
[5]FRYDMAN M,HOLZBERG B,PASTOR J A,et al.Reducing fault reactivation risk on deepwater drilling[C].//SPE Latin America and Caribbean Petroleum Engineering Conference.Argentina,2017:1-15.
[6]LU S,PEREZ J,BRIGNAC C,et al.The missing pressure factor in deepwater SBM[C].//2017 AADE National Technical Conference and Exhibition.Houston,2017:10.
[7]PATEL A,INDULKAR S,CHAVAN V,et al.Clay free invert emulsion drilling fluid system--an innovative rheology modifier which provides flat rheology for deep water drilling and viscosifier for clay free system[C].//Abu Dhabi International Petroleum Exhibition&Conference.Abu Dhabi,2018:1-19
[8]都伟超,孙金声,蒲晓林,等.国内外黏土水化抑制剂研究现状与发展趋势[J].化工进展,2018,37(10):4013-4021.
[9]王志民,谭丽娟,陈胜,等.克深地区井壁稳定性评价及钻井工程应用[J].天然气与石油,2018,36(2):73-78.
[10]都伟超.黏土水化抑制剂Gemini-DHEDB和PDWC的合成及作用机理研究[D].成都:西南石油大学,2017:74-80.
[11]都伟超.油气田开发储层保护成膜封堵剂的研制与性能研究[D].成都:西南石油大学,2014:38-40.
[12]黄进军,李文飞,田月昕,等.水基钻井液用胺类页岩抑制剂特性及作用机理[J].油田化学,2018,35(2):203-208.
[13]谢刚,罗平亚,邓明毅.烷基胺插层蒙脱土的阳离子交换容量研究[J].西南石油大学学报(自然科学版),2018,40(6):165-171.
[14]黄孟,许林,许洁,等.水基恒流变钻井液流型调节剂的制备与性能评价[J].油田化学,2018,35(2):191-202.