CN111378423A - 用于高含水低渗气藏的高含硫天然气井控水剂及其制备方法 - Google Patents
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Abstract
本发明属于油田开采技术领域,具体为用于高含水低渗气藏的高含硫天然气井控水剂及其制备方法,以重量份计,其原料组成包括:纳米颗粒5‑11份、分散剂3‑9份、增强剂1‑3份、复合交联剂0.5‑1.5份、余量为基液,上述各组分的重量份之和为100份;所述复合交联剂以重量计,其原料组成包括:苯酚20‑40g、氢氧化钠1‑3g、37%的甲醛溶液50‑70g;所述增强剂为质量比5:1‑3的碳酸钙、海泡石组成的混合物;所述分散剂为十二烷基硫酸钠、阿拉伯树胶、聚丙烯酰胺中的一种或几种组合;所述纳米颗粒为三氧化二铝纳米颗粒、二氧化硅纳米颗粒中的至少一种;本发明核心采用纳米流体,工艺简单、操作简便、成本低,安全性高,配合分散剂、复合交联剂、增强剂,大大提高了产率。
Description
技术领域
本发明属于油田开采技术领域,具体为用于高含水低渗气藏的高含硫天然气井控水剂及其制备方法。
背景技术
气井控水技术是目前国内外应用较多的排水采气的方法,对这些出水气井的处理而言。随着天然气在工业能源中的地位与日剧增,天然气的发展也已成为一个热点,为此国内外石油和气田工作者也加大了对气田开发中提高采收率措施的研究力度。对一些出水气井,如果能用控水技术直接解决的话,不仅可以降低处理成本,增加经济效益,而且还避免了排水采气工艺中大量产出水的处理,减轻了环境污染、地层出砂、管线腐蚀和结垢等现象。特别是对一些采用排水采气工艺技术成本较高或现场不具备排水采气工艺技术条件的出水气井的处理,更有必要研究气井控水技术。当前,如何选择高效的控水剂是气井实施控水措施的关键,国外相关机构一直致力于相渗改善控水技术的研究与应用,对于高含硫天然气井而言,更是需要考虑到开采问题以及安全问题。
但是目前的控水剂普遍效率低,且成本较高。
发明内容
有鉴于此,本发明的目的在于提供用于高含水低渗气藏的高含硫天然气井控水剂及其制备方法,本发明提供的中药方剂能够实现对血糖疾病的稳定控制,极大降低病发率。
为解决上述问题,本发明的第一方面提供了用于高含水低渗气藏的高含硫天然气井控水剂,以重量份计,其原料组成包括:
纳米颗粒5-11份、分散剂3-9份、增强剂1-3份、复合交联剂0.5-1.5份、余量为基液,上述各组分的重量份之和为100份;
所述复合交联剂以重量计,其原料组成包括:苯酚20-40g、氢氧化钠1-3g、37%的甲醛溶液50-70g;
所述增强剂为质量比5:1-3的碳酸钙、海泡石组成的混合物;
所述分散剂为十二烷基硫酸钠、阿拉伯树胶、聚丙烯酰胺中的一种或几种组合;
所述纳米颗粒为三氧化二铝纳米颗粒、二氧化硅纳米颗粒中的至少一种。
优选的,以重量份计,该种控水剂的原料组成包括:纳米颗粒8份、分散剂6份、增强剂2份、复合交联剂1份、余量为基液,上述各组分的重量份之和为100份。
优选的,以重量份计,该种控水剂的原料组成包括:纳米颗粒5份、分散剂3份、增强剂1份、复合交联剂0.5份、余量为基液,上述各组分的重量份之和为100份。
优选的,以重量份计,该种控水剂的原料组成包括:纳米颗粒11份、分散剂9份、增强剂3份、复合交联剂1.5份、余量为基液,上述各组分的重量份之和为100份。
优选的,所述基液为去离子水。
优选的,所述增强剂为碳酸钙。
优选的,所述聚丙烯酰胺的分子量为2300-2500万。
优选的,该种控水剂的成胶强度为10000-25000mPa·s。
优选的,所述复合交联剂的原料组成包括:苯酚30g、氢氧化钠2.5g、37%的甲醛溶液68.5g。
本发明第二方面提供了一种制备上述用于高含水低渗气藏的高含硫天然气井控水剂的方法,其特征在于,包括以下步骤:
步骤S1,依次加入基液、分散剂纳米颗粒,用玻璃棒搅拌均匀后,磁力搅拌10min,随后放入KQ-400KDB型高功率数控超声波清洗器中进行超声分散3h,静置冷却至室温,得纳米流体;
步骤S2,向步骤S1制得的纳米流体中加入复合交联剂并连续搅拌50min,再加入增强剂并连续搅拌30min后,静置12h,制得所述控水剂。
本发明的上述技术方案具有如下有益的技术效果:
本发明核心采用纳米流体,工艺简单、操作简便、成本低,安全性高,采用十二烷基硫酸钠、阿拉伯树胶、聚丙烯酰胺来作为分散剂,采用复合交联剂、增强剂,大大减小了成胶时间,增加了稳定性;大大提高了产率。
附图说明
图1为本发明用于高含水低渗气藏的高含硫天然气井控水剂制备方法的流程图;
图2为本发明实施例中十二烷基硫酸钠添加量对纳米流体的影响示意图;
图3为本发明实施例1中金属离子促交联剂对成胶强度影响示意图;
图4为本发明实施例1实验结果;
图5为本发明实施例2中金属离子促交联剂对成胶强度影响示意图;
图6为本发明实施例2实验结果;
图7为本发明实施例3金属离子促交联剂对成胶强度影响示意图;
图8为为本发明实施例3实验结果。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚明了,下面结合具体实施方式并参照附图,对本发明进一步详细说明。应该理解,这些描述只是示例性的,而并非要限制本发明的范围。此外,在以下说明中,省略了对公知结构和技术的描述,以避免不必要地混淆本发明的概念。
实施例1
本实施例提供该种控水剂制备方法以及性能测试实验。
以重量份计,其原料组成包括:
纳米颗粒8份、分散剂6份、增强剂2份、复合交联剂1份、余量为去离子水,上述各组分的重量份之和为100份;所述复合交联剂以重量计,其原料组成包括:苯酚30g、氢氧化钠2.5g、37%的甲醛溶液68.5g;所述增强剂为质量比5:3的碳酸钙、海泡石组成的混合物;所述分散剂为阿拉伯树胶和十二烷基硫酸钠(SDS);所述纳米颗粒为二氧化硅纳米颗粒。
该种用于高含水低渗气藏的高含硫天然气井控水剂是通过以下步骤制成的:
制备纳米流体:依次加入去离子水、分散剂、纳米颗粒,用玻璃棒搅拌均匀后,磁力搅拌10min,随后放入KQ-400KDB型高功率数控超声波清洗器中进行超声分散3h,静置0.5h,冷却至室温,得纳米流体。
分别在质量分数为1.00%的二氧化硅颗粒悬浮液中添加质量分数为0.10%、0.20%、0.40%的十二烷基硫酸钠,随后对二氧化硅纳米颗粒悬浮液超声分散5h,其稳定性测试结果如图2所示。
由图2可知,在SDS浓度为1.00%的情况下,纳米流体的浊度下降非常快,因为表面活性剂加入量过少时,它与纳米颗粒之间的吸附不足以形成完整的包覆层,当SDS浓度为0.40%时,其伸向溶液中的亲水基团会互相缠绕、交联,导致凝絮,使纳米流体稳定性受到一定程度的影响。本实验条件下,当SDS浓度为0.25%时,纳米流体具有最优稳定性,静置6天,未发现明显沉淀和分层,故本实施例采用SDS浓度为0.25%来制得纳米流体。
制备复合交联剂:采用电子天平、电热恒温干燥箱、RS6000旋转流变仪。
将装有搅拌器、冷凝器的三口烧瓶置于电热恒温水浴锅中,加入苯酚30.0g,升温至60℃。待苯酚充分熔融后,加入氢氧化钠1.5g,保持温度60℃,搅拌反应20min。加入37%的甲醛溶液55.0g,再升温至65℃,继续搅拌反应30min。加入氢氧化钠1.0g,升高烧瓶温度至70℃,恒温搅拌25min,最后加入37%的甲醛溶液12.5g,恒温搅拌反应20分钟,得水溶性酚醛树脂。
向已制备的水溶性酚醛树脂10.0g,加入一定量的金属离子促交联剂,混合均匀,制得复合交联剂。
如图3所示,为加入金属离子促交联剂,明显提高了成胶速度。
少量的金属离子促交联剂即可对成胶产生显著的影响,加入金属离子促交联剂0.005%即可使成胶强度提升至20000mPa.s以上,当金属离子促交联剂为0.01%时,成胶强度23520mPa.s,随着金属离子促交联剂用量的增加,效果下降,故而,出于效果及成本考虑,本实施例中,金属促交联剂用量为0.008%。
再加入增强剂并将制得的复合交联剂和纳米流体混合,再连续搅拌30min后,静置12h,制得所述控水剂。
性能测试实验:
(1)控水剂粘度的测定
在实验室内取样品置于具塞广口瓶中,在恒温60℃的恒温干燥箱中观察成胶情况,实验发现,4小时后初步成胶,测得的表观粘度为20000mPa.S。
(2)控水剂实验
将90-110目的石英砂充填于直径为3cm,长度为50cm的填砂管中,将上述制得的控水剂与常用的有机凝胶控水剂分别注入相同的上述砂管中,两端进行密封处理,置于60℃恒温干燥箱恒温45小时使其成胶,而后注入水进行实验,结果如图4所示。
实施例2
本实施例提供该种控水剂制备方法以及性能测试实验。
以重量份计,其原料组成包括:
纳米颗粒5份、分散剂3份、增强剂1份、复合交联剂0.5份、余量为基液,上述各组分的重量份之和为100份;所述复合交联剂以重量计,其原料组成包括:苯酚30g、氢氧化钠2.5g、37%的甲醛溶液68.5g;所述增强剂为质量比5:3的碳酸钙、海泡石组成的混合物;所述分散剂为阿拉伯树胶和十二烷基硫酸钠(SDS);所述纳米颗粒为二氧化硅纳米颗粒。
该种用于高含水低渗气藏的高含硫天然气井控水剂是通过以下步骤制成的:
制备纳米流体:依次加入去离子水、分散剂、纳米颗粒,用玻璃棒搅拌均匀后,磁力搅拌10min,随后放入KQ-400KDB型高功率数控超声波清洗器中进行超声分散3h,静置0.5h,冷却至室温,得纳米流体。
分别在质量分数为1.00%的二氧化硅颗粒悬浮液中添加质量分数为0.10%、0.20%、0.40%的十二烷基硫酸钠,随后对二氧化硅纳米颗粒悬浮液超声分散5h,其数据大致与实施例相同,再次不做赘述。
制备复合交联剂:采用电子天平、电热恒温干燥箱、RS6000旋转流变仪。
将装有搅拌器、冷凝器的三口烧瓶置于电热恒温水浴锅中,加入苯酚30.0g,升温至60℃。待苯酚充分熔融后,加入氢氧化钠1.5g,保持温度60℃,搅拌反应20min。加入37%的甲醛溶液55.0g,再升温至65℃,继续搅拌反应30min。加入氢氧化钠1.0g,升高烧瓶温度至70℃,恒温搅拌25min,最后加入37%的甲醛溶液12.5g,恒温搅拌反应20分钟,得水溶性酚醛树脂。
向已制备的水溶性酚醛树脂10.0g,加入一定量的金属离子促交联剂,混合均匀,制得复合交联剂。
为加入金属离子促交联剂,明显提高了成胶速度,本实施例与实施例1大致走势相同,如图5所示。
再加入增强剂并将制得的复合交联剂和纳米流体混合,再连续搅拌30min后,静置12h,制得所述控水剂。
性能测试实验:
(2)控水剂粘度的测定
在实验室内取样品置于具塞广口瓶中,在恒温60℃的恒温干燥箱中观察成胶情况,实验发现,4小时后初步成胶,测得的表观粘度为15000mPa.S。
(2)控水剂实验
将90-110目的石英砂充填于直径为3cm,长度为50cm的填砂管中,将上述制得的控水剂与常用的有机凝胶控水剂分别注入相同的上述砂管中,两端进行密封处理,置于60℃恒温干燥箱恒温45小时使其成胶,而后注入水进行实验,结果如图6所示。
实施例3
与实施例1、2不同的是:
以重量份计,该种控水剂的原料组成包括:纳米颗粒11份、分散剂9份、增强剂3份、复合交联剂1.5份、余量为去离子水,上述各组分的重量份之和为100份。实验初步成胶表观粘度为15000mPa.S。
图7为金属离子促交联剂对成胶强度影响示意图。如图7所示。实施例3整体效果强于实施例2,弱于实施例1。
图8为本实施例实验数据。
故而,对比实施例1、2、3,本发明在实际使用中,优选实施例1作为具体实施方案。
应当理解的是,本发明的上述具体实施方式仅仅用于示例性说明或解释本发明的原理,而不构成对本发明的限制。因此,在不偏离本发明的精神和范围的情况下所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。此外,本发明所附权利要求旨在涵盖落入所附权利要求范围和边界、或者这种范围和边界的等同形式内的全部变化和修改例。
Claims (10)
1.用于高含水低渗气藏的高含硫天然气井控水剂,其特征在于,以重量份计,其原料组成包括:
纳米颗粒5-11份、分散剂3-9份、增强剂1-3份、复合交联剂0.5-1.5份、余量为基液,上述各组分的重量份之和为100份;
所述复合交联剂以重量计,其原料组成包括:苯酚20-40g、氢氧化钠1-3g、37%的甲醛溶液50-70g;
所述增强剂为质量比5:1-3的碳酸钙、海泡石组成的混合物;
所述分散剂为十二烷基硫酸钠、阿拉伯树胶、聚丙烯酰胺中的一种或几种组合;
所述纳米颗粒为三氧化二铝纳米颗粒、二氧化硅纳米颗粒中的至少一种。
2.根据权利要求1所述的用于高含水低渗气藏的高含硫天然气井控水剂,其特征在于,以重量份计,该种控水剂的原料组成包括:纳米颗粒8份、分散剂6份、增强剂2份、复合交联剂1份、余量为基液,上述各组分的重量份之和为100份。
3.根据权利要求1所述的用于高含水低渗气藏的高含硫天然气井控水剂,其特征在于,以重量份计,该种控水剂的原料组成包括:纳米颗粒5份、分散剂3份、增强剂1份、复合交联剂0.5份、余量为基液,上述各组分的重量份之和为100份。
4.根据权利要求1所述的用于高含水低渗气藏的高含硫天然气井控水剂,其特征在于,以重量份计,该种控水剂的原料组成包括:纳米颗粒11份、分散剂9份、增强剂3份、复合交联剂1.5份、余量为基液,上述各组分的重量份之和为100份。
5.根据权利要求1所述的用于高含水低渗气藏的高含硫天然气井控水剂,其特征在于,所述基液为去离子水。
6.根据权利要求1所述的用于高含水低渗气藏的高含硫天然气井控水剂,其特征在于,所述增强剂为碳酸钙。
7.根据权利要求1所述的用于高含水低渗气藏的高含硫天然气井控水剂,其特征在于,所述聚丙烯酰胺的分子量为2300-2500万。
8.根据权利要求1所述的用于高含水低渗气藏的高含硫天然气井控水剂,其特征在于,该种控水剂的成胶强度为10000-25000mPa·s。
9.根据权利要求1所述的用于高含水低渗气藏的高含硫天然气井控水剂,其特征在于,所述复合交联剂的原料组成包括:苯酚30g、氢氧化钠2.5g、37%的甲醛溶液68.5g。
10.一种制备权利要求1-9任一项所述的用于高含水低渗气藏的高含硫天然气井控水剂的方法,其特征在于,包括以下步骤:
步骤S1,依次加入基液、分散剂纳米颗粒,用玻璃棒搅拌均匀后,磁力搅拌10min,随后放入KQ-400KDB型高功率数控超声波清洗器中进行超声分散3h,静置冷却至室温,得纳米流体;
步骤S2,向步骤S1制得的纳米流体中加入复合交联剂并连续搅拌50min,再加入增强剂并连续搅拌30min后,静置12h,制得所述控水剂。
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