CN85105344A - 锆冻胶水基压裂液 - Google Patents
锆冻胶水基压裂液 Download PDFInfo
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- CN85105344A CN85105344A CN85105344.0A CN85105344A CN85105344A CN 85105344 A CN85105344 A CN 85105344A CN 85105344 A CN85105344 A CN 85105344A CN 85105344 A CN85105344 A CN 85105344A
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Abstract
本发明是属于水基压裂液的配方改进。它采用了无机锆化合物作为交联剂,既可在碱性条件下,也可在酸性条件下与成胶剂交联出粘弹性极好锆冻胶。这种锆冻胶压裂液粘度高、摩阻低,破胶水化后无残渣。而且在水化后,无机锆化合物是一种粘土防膨剂。该发明的压裂液不仅适用于粘土含量高的地层,而且由于无机锆化合物便宜易得,所以,在其降阻性达到或超过硼冻胶压裂液时,其成本可降低18~35%。
Description
本发明是属于水基压裂液的配方改进。
压裂可使油井增产、水井增注,通常使用的压裂液分为两类,一类是油基压裂液,另一类是水基压裂液。前类压裂液适用于压裂油井、保护油层,特别适用于粘土含量高的地层。但它的价格昂贵,并且不安全(易燃)。后一类压裂液便宜、安全,只要配方得当,可用于压裂油井、水井。这后一类压裂液主要是指水冻胶压裂液,它不但粘度高,摩阻低,能在指定时间破胶水化。而且水化后粘度低,便于排液。其缺点是不适用于粘土含量高的地层,尤其是碱性的水冻胶压裂液,破胶水化后会使地层的粘土膨涨,减少地层的渗透率,影响压裂效果。在现场中,曾用过各类水冻胶压裂液,如硼冻胶,钡冻胶,铬冻胶和铝冻胶,而以硼冻胶的使用为最多。这种硼冻胶虽然易于交联,所产生的冻胶具有极好的粘弹性,而且成胶剂和交联剂都便宜易得,但其最大的缺点是破胶水化后有大量的残渣,堵塞地层,且破胶后的残渣(由于是碱性交联)会引起粘土膨涨,影响压裂效果。1971年以来,国外在高温地层也用过锆冻胶压裂液,但所使用的交联剂是价格昂贵的有机锆。
本发明的目的就是针对上述硼冻胶压裂液的缺点,用一种新型的交联剂,在酸性条件下将聚丙烯酰胺交联起来,为压裂粘土含量高的油层提供一种高粘度、低摩阻、能在指定时间内破胶水化,水化后残液粘度低,无残渣,并且具有粘土防膨性能和与油不乳化的优质压裂液。本发明所说的新型交联剂是指氯氧化锆(ZrOCl2),氯化锆(ZrCl4)和硫酸锆(Zr(SO4)2)等无机锆化合物。它们虽可在碱性条件下(PH值为9-12)下交联改性或不改性的半乳-甘露聚糖,但更出色的是在酸性条件下(PH值为3-4)下交联未水解或低水解度的聚丙烯酰胺,产生如同硼冻胶那样的粘弹性好的冻胶。这种无机锆化合物(ZrOCl2)在压裂液作为携砂液时是交联剂,在破胶水化后,它又是一种粘土防膨剂,能有效地抑制粘土膨涨。
交联剂氯氧化锆使用的浓度为0.01-0.05%(重),成胶剂聚丙烯酰胺(分子量>3000000)的浓度为0.8-0.4%(重),交联后,所得冻胶的降阻性能均可达0.7-0.8%(重)的田菁粉-硼砂冻胶所达的指标。而且在原配方中加入0.01-0.05%(重)的氧化剂(如K2S2O8等),可使该冻胶在指定的时间内破胶水化。水化后,残液中无残渣,此时的无机锆化合物又是粘土防膨剂。
无机锆化合物(如ZrOCl2)便宜易得,采用上述配方不仅可达到和超过田菁粉-硼砂冻胶压裂液的各种性能,而且还可使成本费用降低18-35%。
Claims (2)
1、锆冻胶水基压裂夜,它是以聚丙烯酰胺或半乳-甘露聚糖为胶剂,一定量的氧化剂为破胶剂和防乳化剂及交联剂等组成,其特征在于所采用的交联剂是无机锆化合物。
2、根据权利要求1,所说的无机锆化和物是指氯氧化锆(ZrOCl2)或氯化锆(ZrCl4)。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN85105344.0A CN1004138B (zh) | 1985-07-05 | 1985-07-05 | 锆冻胶水基压裂液 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN85105344.0A CN1004138B (zh) | 1985-07-05 | 1985-07-05 | 锆冻胶水基压裂液 |
Publications (2)
Publication Number | Publication Date |
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CN85105344A true CN85105344A (zh) | 1986-07-02 |
CN1004138B CN1004138B (zh) | 1989-05-10 |
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CN85105344.0A Expired CN1004138B (zh) | 1985-07-05 | 1985-07-05 | 锆冻胶水基压裂液 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1323127C (zh) * | 2004-09-27 | 2007-06-27 | 克拉玛依新科澳化工有限公司 | 高聚物压裂液及其配制方法 |
CN1329474C (zh) * | 2005-06-17 | 2007-08-01 | 甘肃省庆阳长庆井下化工厂 | 醇基压裂液 |
CN100591743C (zh) * | 2006-12-29 | 2010-02-24 | 中国科学院长春应用化学研究所 | 一种复合压裂液 |
CN101220264B (zh) * | 2007-12-18 | 2011-02-02 | 中国石油集团川庆钻探工程有限公司 | 一种co2泡沫压裂用酸性交联剂的制备方法 |
CN102071004A (zh) * | 2010-12-07 | 2011-05-25 | 大庆油田有限责任公司 | 一种低聚物酸性压裂液 |
-
1985
- 1985-07-05 CN CN85105344.0A patent/CN1004138B/zh not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1323127C (zh) * | 2004-09-27 | 2007-06-27 | 克拉玛依新科澳化工有限公司 | 高聚物压裂液及其配制方法 |
CN1329474C (zh) * | 2005-06-17 | 2007-08-01 | 甘肃省庆阳长庆井下化工厂 | 醇基压裂液 |
CN100591743C (zh) * | 2006-12-29 | 2010-02-24 | 中国科学院长春应用化学研究所 | 一种复合压裂液 |
CN101220264B (zh) * | 2007-12-18 | 2011-02-02 | 中国石油集团川庆钻探工程有限公司 | 一种co2泡沫压裂用酸性交联剂的制备方法 |
CN102071004A (zh) * | 2010-12-07 | 2011-05-25 | 大庆油田有限责任公司 | 一种低聚物酸性压裂液 |
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Publication number | Publication date |
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CN1004138B (zh) | 1989-05-10 |
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