抗高温微交联聚合物降滤失剂的制备与性能评价
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摘要
为提高聚合物降滤失剂耐温抗盐性和与高密度高固相深井钻井液体系的配伍性,以自制的六烯基单体TDED为交联剂,与丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和N-乙烯基吡咯烷酮(NVP)进行自由基共聚反应,制得微交联共聚物降滤失剂PTAPN。通过红外光谱仪表征了产物结构,研究了PTAPN的抗温耐盐性及与不同密度钻井液的配伍性。结果表明,产物分子结构与设计相符。PTAPN在高温、高矿化度环境中具备良好的降滤失性能。加入2%PTAPN后,淡水与复合盐水基浆240℃老化前后的黏度增加,滤失量大幅降低。PTAPN与不同密度水基钻井液的配伍性良好,可有效控制密度为2.30 g/cm3的加重钻井液在高温环境中的流变性与滤失量。当老化温度为240℃时,加重钻井液的API滤失量与高温高压滤失量分别为2.6 mL和12.6 mL,远小于含常规线性聚合物降滤失剂的钻井液。PTAPN适于作为高温高密度钻井液体系的降滤失剂。
In order to improve the temperature and salt resistance of polymer fluid loss additive and the compatibility with high density and high solid phase deep well drilling fluid system,the self-made hexene monomer TDED was used as a crosslinking agent, and acrylamide(AM), 2-acrylamide-2-methylpropanesulfonic acid(AMPS) and N-vinylpyrrolidone(NVP) were subjected to free radical copolymerization to prepare a micro-crosslinking copolymer fluid loss additive PTAPN. The structure of theproduct was characterized by infrared spectrometer. The temperature and salt tolerance of PTAPN and the compatibility with different density drilling fluids were studied. The results showed that the molecular structure of the product was consistent with the design. PTAPN had good fluid loss performance in high temperature and high salinity environments. After adding 2% PTAPN,the viscosity of fresh water and composite brine base slurry increased before and after aging at 240℃,and the fluid loss greatly reduced. PTAPN had good compatibility with different density water-based drilling fluids,which could effectively control the rheology and fluid loss of heavy drilling fluid with a density of 2.30 g/cm3 in high temperature environment. When the aging temperature was 240℃,the API fluid loss and high temperature and high pressure fluid loss of weighting drilling fluid was 2.6 and12.6 m L,respectively,which was much smaller than that of drilling fluid containing conventional linear polymer fluid loss additive. PTAPN was suitable as a fluid loss additive for high temperature and high density drilling fluid systems.
In order to improve the temperature and salt resistance of polymer fluid loss additive and the compatibility with high density and high solid phase deep well drilling fluid system,the self-made hexene monomer TDED was used as a crosslinking agent, and acrylamide(AM), 2-acrylamide-2-methylpropanesulfonic acid(AMPS) and N-vinylpyrrolidone(NVP) were subjected to free radical copolymerization to prepare a micro-crosslinking copolymer fluid loss additive PTAPN. The structure of theproduct was characterized by infrared spectrometer. The temperature and salt tolerance of PTAPN and the compatibility with different density drilling fluids were studied. The results showed that the molecular structure of the product was consistent with the design. PTAPN had good fluid loss performance in high temperature and high salinity environments. After adding 2% PTAPN,the viscosity of fresh water and composite brine base slurry increased before and after aging at 240℃,and the fluid loss greatly reduced. PTAPN had good compatibility with different density water-based drilling fluids,which could effectively control the rheology and fluid loss of heavy drilling fluid with a density of 2.30 g/cm3 in high temperature environment. When the aging temperature was 240℃,the API fluid loss and high temperature and high pressure fluid loss of weighting drilling fluid was 2.6 and12.6 m L,respectively,which was much smaller than that of drilling fluid containing conventional linear polymer fluid loss additive. PTAPN was suitable as a fluid loss additive for high temperature and high density drilling fluid systems.
引文
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[13] TAMSILIAN Y,RAMAZANI S A. Study of hydrogel modified drilling fluid:preparation,rheological properties and swelling behaviors of chitosan n-isopropylacrylamide hydrogel[J].Brazilian J Pet Gas,2012,6(2):79-91.
[14] MORADI-ARAHI A. Hydrolysis and precipitation of polyacrylimids in hard brines at elevated temperature[J].SPE Reserv Eng,1987,2(2):189-198.
[15]乔孟占,李晓岚,何水良,等.抗高温抗盐降滤失剂JRJTS的研制[J].油田化学,2012,29(4):385-389.
[16]黄维安,邱正松,乔军,等.抗温抗盐聚合物降滤失剂的研制及其作用机制[J].西南石油大学学报(自然科学版),2013,35(1):129-134.
[17]邱正松,毛惠,黄维安,等.抗高温钻井液增黏剂的研制及应用[J].石油学报,2015,36(1):106-113.
[2]黄维安,邱正松,曹杰,等.钻井液用超高温抗盐聚合物降滤失剂的研制与评价[J].油田化学,2012,29(2):133-137.
[3]刘鹭,蒲晓林,戴毅,等.低黏度效应聚合物降滤失剂的合成与性能评价[J].油田化学,2016,33(3):381-385.
[4] AMANULLAH M,AL ARFAJ M K,AL-ABDULLATIF Z A.Preliminary test results of nano-based drilling fluids for oil and gas field application[C].//SPE/IADC Drilling Conference and Exhibition, Netherlands,2011:1-9.
[5]鄢捷年.钻井液工艺学[M].东营:中国石油大学出版社,2001:63-69.
[6]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):295-300.
[7] CHATTERJI J,CROMWELL R S,BRENNEIS D C. Cationic cellulose ethers as fluid loss control additives in cement compositions and associated:US2007137529 AI[P]. 2007-06-21.
[8]张丽君,王旭,胡小燕,等.抗温270℃钻井液聚合物降滤失剂的研制[J].石油化工,2017,46(1):117-122.
[9]张丽君,王旭,胡小燕,等.抗260℃超高温水基钻井液体系[J].钻井液与完井液,2015,32(4):5-8.
[10]胡小燕,王旭,张丽君,等.超高温270℃水基钻井液体系研究[J].精细石油化工进展,2016,17(6):8-12.
[11] SUBHASH N,SHANKER P,NARAYAN H,et al. Future challenges of drilling fluids and their rheological measurements[J]. Am Assoc Drilling Eng,2010,10(41):1-16.
[12] PANAMARATHUPALAYAM B. Crosslinked synthetic polymer-based reservoir drilling fluid:US20170198189 AI[P]. 2017-12-18.
[13] TAMSILIAN Y,RAMAZANI S A. Study of hydrogel modified drilling fluid:preparation,rheological properties and swelling behaviors of chitosan n-isopropylacrylamide hydrogel[J].Brazilian J Pet Gas,2012,6(2):79-91.
[14] MORADI-ARAHI A. Hydrolysis and precipitation of polyacrylimids in hard brines at elevated temperature[J].SPE Reserv Eng,1987,2(2):189-198.
[15]乔孟占,李晓岚,何水良,等.抗高温抗盐降滤失剂JRJTS的研制[J].油田化学,2012,29(4):385-389.
[16]黄维安,邱正松,乔军,等.抗温抗盐聚合物降滤失剂的研制及其作用机制[J].西南石油大学学报(自然科学版),2013,35(1):129-134.
[17]邱正松,毛惠,黄维安,等.抗高温钻井液增黏剂的研制及应用[J].石油学报,2015,36(1):106-113.