CN109652034A - 一种维持高温及高含盐条件下水基钻井液pH值的方法 - Google Patents
一种维持高温及高含盐条件下水基钻井液pH值的方法 Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 61
- 239000012530 fluid Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229940123973 Oxygen scavenger Drugs 0.000 claims abstract description 21
- 239000003381 stabilizer Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 238000012423 maintenance Methods 0.000 claims description 14
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical group [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 6
- 235000010265 sodium sulphite Nutrition 0.000 claims description 5
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical group CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims description 3
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 claims description 3
- 229960002887 deanol Drugs 0.000 claims description 3
- 239000012972 dimethylethanolamine Substances 0.000 claims description 3
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims 1
- 238000006392 deoxygenation reaction Methods 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract description 12
- 150000003839 salts Chemical class 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 235000011121 sodium hydroxide Nutrition 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000011418 maintenance treatment Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 5
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 239000004021 humic acid Substances 0.000 description 2
- 230000009435 amidation Effects 0.000 description 1
- 238000007112 amidation reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011807 nanoball Substances 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229940080314 sodium bentonite Drugs 0.000 description 1
- 229910000280 sodium bentonite Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006277 sulfonation reaction Methods 0.000 description 1
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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Abstract
本发明公开了一种维持高温及高含盐条件下水基钻井液pH值的方法,其在现有水基钻井液配方的基础上,以水基钻井液配方质量百分比计,增加0.3%~1.0%的pH稳定剂和0.3%~0.5%的除氧剂,加入具体方法为:在配制水基钻井液结束后,依次加入pH稳定剂和除氧剂;在维护处理期间,上述两种处理剂按比例加入,其中除氧剂最后加入。本方法能缓解水基钻井液在高温、高含盐条件下pH值的下降幅度,使其pH值保持相对稳定,防止钻井液因pH值下降导致处理剂失效、钻具腐蚀等造成的井下复杂,同时也减少了高温、高含盐条件下依靠大量补充烧碱来维护钻井液pH值的情况,起到了降本增效的效果。
Description
技术领域
本发明涉及石油天然气钻井行业,确切地说涉及一种维持高温及高含盐条件下水基钻井液pH值的方法。
背景技术
钻井液在使用过程中,由于温度升高、盐侵等原因,其pH值会降低,不仅在一定程度上影响处理剂在钻井液中的功效,降低钻井液的工作性能,还会加重钻具的腐蚀,造成钻井事故,增加钻井成本。钻井液在高温、高含盐的条件下pH值都会降低,并且随着时间的延长,pH值会不断下降;温度越高pH值下降越快、含盐量越高pH值下降幅度越大。
目前的解决办法是向钻井液中补充大量烧碱,维持钻井液的pH值后再调整钻井液性能。如公开号为108276975A,公开日为2018年7月13日的中国专利文献公开了种抗高温水基钻井液及其制备方法,所述钻井液包含水100份;钠基膨润土1~2份;pH值调节剂1.0~1.6份;高温稳定剂2~4份;改性腐殖酸降滤失剂2~4份;抗高温磺化类稀释剂2~3份;高温流型调节剂0.8~1.2份;无机盐12~18份和加重剂,加重剂的用量以使得水基钻井液的密度在2.0~2.4g/cm3范围内,高温稳定剂为粒径为0.1~1μm的微纳米球;改性腐殖酸降滤失剂由腐殖酸经酰胺化改性得到。实施例表明,该发明提供的抗高温水基钻井液在220℃高温、2.2g/ cm3高密度下仍然具有“低粘高切”的流变特性,有利于大斜度及水平井携带岩屑,而且高温高压条件下滤失量仅为12mL。
但是,以上述专利文献为代表的现有依靠补充大量烧碱的方式,其成本较高。
发明内容
本发明旨在针对上述现有技术所存在的缺陷和不足,提供一种维持高温及高含盐条件下水基钻井液pH值的方法。本方法能缓解水基钻井液在高温、高含盐条件下pH值的下降幅度,使其pH值保持相对稳定,防止钻井液因pH值下降导致处理剂失效、钻具腐蚀等造成的井下复杂,同时也减少了高温、高含盐条件下依靠大量补充烧碱来维护钻井液pH值的情况,起到了降本增效的效果。
本发明是通过采用下述技术方案实现的:
一种维持高温及高含盐条件下水基钻井液pH值的方法,其特征在于:在现有水基钻井液配方的基础上,以水基钻井液配方质量百分比计,增加0.3%~1.0%的pH稳定剂和0.3%~0.5%的除氧剂,加入具体方法为:在配制水基钻井液结束后,依次加入pH稳定剂和除氧剂;在维护处理期间,上述两种处理剂按比例加入,其中除氧剂最后加入。
所述的pH稳定剂为甲基单乙醇胺、甲基二乙醇胺或二甲基乙醇胺。
所述的除氧剂为亚硫酸钠。
与现有技术相比,本发明所达到的有益效果如下:
1、采用本方法所说的在现有水基钻井液配方的基础上,增加0.3%~1.0%的pH稳定剂和0.3%~0.5%的除氧剂,以及采用的加入方法。经实验得知,用于水基钻井液后,水基钻井液的pH下降值在温度130℃、含盐达120,000mg/L的情况下,可降低70%~85%;在150℃、含盐达120,000mg/L的情况下,可降低60%~75%,在180℃、含盐达120,000mg/L的条件下,可降低45%~55%。同时,通过本方法处理的水基钻井液其它性能不受影响,能够有效地解决深井高温高含盐情况下使用水基钻井液pH值快速下降的问题,降低钻井复杂事故,并节约钻井液材料使用量。
2、本方法能很好的降低水基钻井液在高温高含盐条件下pH值下降幅度;减少了以往在高温高含盐条件下,pH值大幅下降,导致处理剂失效、钻具腐蚀等问题造成的井下复杂情况;减少了以往在高温高含盐条件下,需要依靠大量补充强碱来维护钻井液pH值的问题;提高了水基钻井液抗温抗盐能力,整体性能更加稳定,降低维护处理频率,具有更好的经济性。
具体实施方式
实施例1
作为本发明的一较佳实施方式,其公开了一种维持高温及高含盐条件下水基钻井液pH值的方法,在现有水基钻井液配方的基础上,以水基钻井液配方质量百分比计,增加0.3%的pH稳定剂和0.3%的除氧剂,加入具体方法为:在配制水基钻井液结束后,依次加入pH稳定剂和除氧剂;在维护处理期间,上述两种处理剂按比例加入,其中除氧剂最后加入。
所述的pH稳定剂为甲基单乙醇胺。所述的除氧剂为亚硫酸钠。
实施例2
作为本发明的另一较佳实施方式,其公开了一种维持高温及高含盐条件下水基钻井液pH值的方法,在现有水基钻井液配方的基础上,以水基钻井液配方质量百分比计,增加1.0%的pH稳定剂和0.5%的除氧剂,加入具体方法为:在配制水基钻井液结束后,依次加入pH稳定剂和除氧剂;在维护处理期间,上述两种处理剂按比例加入,其中除氧剂最后加入。
所述的pH稳定剂为甲基二乙醇胺。所述的除氧剂为亚硫酸钠。
实施例3
作为本发明的最佳实施方式,其公开了一种维持高温及高含盐条件下水基钻井液pH值的方法,在现有水基钻井液配方的基础上,以水基钻井液配方质量百分比计,增加0.6%的pH稳定剂和0.4%的除氧剂,加入具体方法为:在配制水基钻井液结束后,依次加入pH稳定剂和除氧剂;在维护处理期间,上述两种处理剂按比例加入,其中除氧剂最后加入。
所述的pH稳定剂为二甲基乙醇胺。所述的除氧剂为亚硫酸钠。
Claims (3)
1.一种维持高温及高含盐条件下水基钻井液pH值的方法,其特征在于:在现有水基钻井液配方的基础上,以水基钻井液配方质量百分比计,增加0.3%~1.0%的pH稳定剂和0.3%~0.5%的除氧剂,加入具体方法为:在配制水基钻井液结束后,依次加入pH稳定剂和除氧剂;在维护处理期间,上述两种处理剂按比例加入,其中除氧剂最后加入。
2.根据权利要求1所述的一种维持高温及高含盐条件下水基钻井液pH值的方法,其特征在于:所述的pH稳定剂为甲基单乙醇胺、甲基二乙醇胺或二甲基乙醇胺。
3.根据权利要求1所述的一种维持高温及高含盐条件下水基钻井液pH值的方法,其特征在于:所述的除氧剂为亚硫酸钠。
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CN115477930A (zh) * | 2021-05-31 | 2022-12-16 | 中国石油天然气集团有限公司 | 钻井液用ph稳定剂及其应用方法 |
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WO2009004219A2 (fr) * | 2007-06-12 | 2009-01-08 | Lang Gerard | Additif de réduction du chrome hexavalent, son procédé d'obtention, et applications de cet additif notamment dans les produits à base de ciments. |
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CN108300444A (zh) * | 2018-02-09 | 2018-07-20 | 塔里木大学 | 一种采油用油套环空保护液及其制备方法 |
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US20040138069A1 (en) * | 2003-01-15 | 2004-07-15 | Sarkis Kakadjian | Drilling fluid with circulation loss reducing additive package |
US20090291862A1 (en) * | 2003-01-15 | 2009-11-26 | Intevep, S.A. | Drilling fluid with circulation loss reducing additive package |
WO2009004219A2 (fr) * | 2007-06-12 | 2009-01-08 | Lang Gerard | Additif de réduction du chrome hexavalent, son procédé d'obtention, et applications de cet additif notamment dans les produits à base de ciments. |
CN103333666A (zh) * | 2013-06-14 | 2013-10-02 | 中国石油化工股份有限公司 | 一种无固相完井封闭液及其制备方法 |
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CN115477930A (zh) * | 2021-05-31 | 2022-12-16 | 中国石油天然气集团有限公司 | 钻井液用ph稳定剂及其应用方法 |
CN115477930B (zh) * | 2021-05-31 | 2023-06-30 | 中国石油天然气集团有限公司 | 钻井液用ph稳定剂及其应用方法 |
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