CN101531892B - 超低温超级胍胶压裂液 - Google Patents
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Abstract
本发明涉及一种超低温超级胍胶压裂液。该压裂液包括下列各组分，下列各组分按质量百分比配比：超级胍胶0.20％、有机硅聚醚0.12％、聚氧丙烯聚氧乙烯聚氧丙烯十八醇醚0.07％、有机胺阳离子0.32％、阳离子长链聚合物0.09％、有机硅油0.03％、硼砂0.0003％、过硫酸盐0.00027％、高价含氧酸盐0.00009％、过氧化物0.00014％，余量为水。该压裂液抗剪切性能好、破胶彻底。
Description
技术领域：
本发明涉及油田采油领域所用的一种压裂液，具体涉及一种应用于30℃超低温储层压裂中的压裂工作液。
背景技术：
随着当代世界经济发展对石油资源的需要和勘探开发认识的不断提高，相继发现了超低温储层，并具有一定的含油显示，压裂液是压裂施工的工作液，用于在施工中传递能量，使油层张开裂缝，并沿裂缝输送支撑剂，从而在油层中形成一条高导流能力通道，以利于油气由地层远处流向井底，达到增产目的。
目前广泛应用的压裂稠化剂胍胶溶解主要靠支链的半乳糖结构，但半乳糖在胍胶主链的分布是不均匀的，半乳糖含量少的区域易通过分子间氢键结合在一起形成大的聚集体，同时配液水温度越低，水分子运动越慢，越难进入聚集体内部破坏其结构，导致难溶胀形成“鱼眼”，此外，过硫酸盐的分解为一级反应。在低于50℃的温度时，破胶能力迅速下降。将导致压裂液抗剪切性能差，无法形成有效的动态裂缝和适合加砂的缝宽，施工结束后，压裂液破胶不彻底，滞留储层造成伤害，使压裂措施失去增产效果，因此，以往成熟的水基压裂液已不能满足压裂需要。
发明内容：
本发明是针对超低温储层增产改造而提出的一项高性能压裂措施工作液技术，综合性能评价表明，该压裂液抗剪切性能好、破胶彻底。
本发明的技术方案是：该压裂液包括下列各组分，下列各组分按质量百分比配比：超级胍胶0.20％、有机硅聚醚0.12％、聚氧丙烯聚氧乙烯聚氧丙烯十八醇醚0.07％、有机胺阳离子0.32％、阳离子长链聚合物0.09％、有机硅油0.03％、硼砂0.0003％、过硫酸盐0.00027％、高价含氧酸盐0.00009％、过氧化物0.00014％，余量为水。
上述的超级胍胶0.20％、由10％环氧乙烷、89％环氧丙烷、1％有机硅聚合而成的有机硅聚醚0.12％、破乳剂SP169 0.07％、由3％十二烷基氯化铵、5.5％盐酸、2.5％亚硝酸钠及余量水复合的有机胺阳离子0.32％、十六烷基氯化吡啶0.09％、硅酮0.03％、硼砂0.0003％、过硫酸钾0.00027％、亚硝酸钠0.00009％、过氧化氢0.00014％，余量为水；有机硅聚醚的聚合度为48。
上述方案中超级胍胶为精细挑选的胍胶原粉，用于提高水溶液的粘度，与交联剂形成冻胶，压裂施工时向地层携带支撑剂；有机硅聚醚是一种表面活性剂，用于降低压裂液破胶液的表面张力，促进其返排；破乳剂SP169吸附于油/水界面，形成的新界面膜的强度降低，利于破乳；有机胺阳离子用作粘土稳定剂，用于防止粘土水合膨胀或分散运移；十六烷基氯化吡啶用作杀菌剂，用来杀灭溶液中的细菌，保证压裂液配制后不腐败变质；硅酮用作消泡剂，用来减少基液中的泡沫量；硼砂用作硼交联剂，用来与稠化剂超级胍胶联结成网状体型结构；过硫酸钾用作破胶剂，用来使压裂液破胶，保证施工后压裂液返排彻底；亚硝酸钠用作破胶催化剂，用来促使压裂液破胶；过氧化氢用作助破胶剂，用来促使压裂液破胶。
本发明具有如下有益效果：本发明与现有技术相比具有如下特点：(1)溶胀性能好：压裂液配制过程简单，稠化剂亲水基团在外，因此易溶解于水，溶胀速度快，短时间内压裂液基液可达到最佳粘度，确保了压裂液的成胶性能。(2)抗剪切性能好：压裂液是具有良好输送性能的高粘溶液，其流变性特点有利于地层的破裂和人工裂缝的延伸，以及悬浮和输送支撑剂，形成有足够流通能力的填砂裂缝。(3)破胶性能好：采用三元破胶技术，通过加入助破胶剂，降低破胶反应活化能，保证压裂施工后压裂液破胶彻底，及时返排，减少对储层造成的伤害，获得预期的增产效果。
附图说明：
图1超低温压裂液流变性能曲线；
图2C 85-P平33井压裂施工曲线。
具体实施方式：
下面结合实施例对本发明作进一步说明：
C 85-P平33井位于黑龙江省大庆市，属松辽盆地北部中央坳陷区朝阳沟阶地朝阳沟背斜构造。射孔井段为840.0～832.0m、783.0～775.0m、732.0～725.0m和662.0～657.0m。储层中部温度约30℃。
针对该层的压裂液体系在30℃条件下，剪切40min，粘度为203.1mPa.s(见表1、图1)，且压裂液在30℃条件下4h后破胶液粘度为3.8mPa.s，现场配制的压裂液基液粘度30.4mPa.s，交联情况良好，冻胶表面光滑，满足了储层施工的需要，该井压裂4个层段，共加支撑剂115m3，施工顺利(本井第3段施工曲线见图2)。所用的压裂液由超级胍胶0.20％、由10％环氧乙烷、89％环氧丙烷、1％有机硅聚合而成的有机硅聚醚0.12％、破乳剂SP169 0.07％、由3％十二烷基氯化铵、5.5％盐酸、2.5％亚硝酸钠及余量水复合的有机胺阳离子0.32％、十六烷基氯化吡啶0.09％、硅酮0.03％、硼砂0.0003％、过硫酸钾0.00027％、亚硝酸钠0.00009％、过氧化氢0.00014％及余量为水混合而成。
超低温压裂液流变性能 表1
本发明中所用的超级胍胶由中国石油物资昆山公司生产，型号为JK，性能：它是压裂液的主剂，用以提高水溶液的粘度，与交联剂形成冻胶，压裂施工时向地层携带支撑剂。
Claims (1)
1.一种30℃超低温超级胍胶压裂液，其特征在于：该压裂液包括下列各组分，下列各组分按质量百分比配比：超级胍胶JK0.20％、有机硅聚醚0.12％、聚氧丙烯聚氧乙烯聚氧丙烯十八醇醚SP1690.07％、有机胺阳离子0.32％、十六烷基氯化吡啶0.09％、硅酮0.03％、硼砂0.0003％、过硫酸钾0.00027％、亚硝酸钠0.00009％、过氧化氢0.00014％，余量为水；其中有机硅聚醚由10％环氧乙烷、89％环氧丙烷、1％有机硅聚合而成，聚合度为48；有机胺阳离子由3％十二烷基氯化铵、5.5％盐酸、2.5％亚硝酸钠及余量水复合而成。
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| CN102757777B (zh) * | 2012-06-21 | 2014-04-02 | 中国石油天然气股份有限公司 | 一种用于致密气藏压裂的抑制水锁型耐高温压裂液 |
| CN103773326B (zh) * | 2012-10-23 | 2016-03-09 | 中国石油天然气集团公司 | 钻井液消泡剂 |
| CN103497752A (zh) * | 2013-09-30 | 2014-01-08 | 中国石油天然气股份有限公司 | 微残留液态速溶压裂液 |
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| CN105733548B (zh) * | 2016-01-29 | 2019-01-18 | 河南大学 | 一种胍胶压裂液纳米交联剂的制备方法 |
| CN105647507B (zh) * | 2016-01-29 | 2018-04-10 | 河南大学 | 一种水分散胍胶压裂液交联剂的制备方法 |
| CN112745822A (zh) * | 2021-02-03 | 2021-05-04 | 成都劳恩普斯科技有限公司 | 一种聚合物压裂液高效低温破胶剂及其制备方法 |
| CN113338883B (zh) * | 2021-05-06 | 2022-08-19 | 山东科技大学 | 一种基于超声波空化效应的压裂液强化返排方法 |
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| WO2007136798A2 (en) * | 2006-05-19 | 2007-11-29 | Hercules Incorporated | Oxidized guar for oilfield servicing fluids |
| CN101362943A (zh) * | 2008-09-15 | 2009-02-11 | 青岛生物能源与过程所 | 以含碳数在18～40的长链季铵盐制备耐温抗剪切新型清洁压裂液稠化剂 |
| CN101381598A (zh) * | 2008-10-24 | 2009-03-11 | 延长油田股份有限公司子北采油厂 | 一种压裂液及其制备方法 |
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