CN104449622A - 抗高温高压有机复合型油层保护液及其制备方法 - Google Patents

抗高温高压有机复合型油层保护液及其制备方法 Download PDF

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CN104449622A
CN104449622A CN201410802086.XA CN201410802086A CN104449622A CN 104449622 A CN104449622 A CN 104449622A CN 201410802086 A CN201410802086 A CN 201410802086A CN 104449622 A CN104449622 A CN 104449622A
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Abstract

本发明的抗高温高压有机复合型油层保护液及其制备方法,涉及油田化工技术领域,是由聚丙烯酰胺3~6份、氧化型交联剂2~5份、无机型促凝剂2~8份、水63~88份和98%乙醇5~18份组成,其制备方法是将聚丙烯酰胺溶于水中,再加入氧化型交联剂的乙醇溶液,35~60℃恒温搅拌1~5小时,最后将混合液冷却至20~30℃,加入2~8份无机型促凝剂,搅拌30分钟,即制得成品。本发明的抗高温高压有机复合型油层保护液,其密度范围为1.05g/cm3~1.35g/cm3、无机防膨组分作用周期长、氯离子含量低于300mg/L、不含重金属离子、具有低粘和低滤失性、热稳定性好。

Description

抗高温高压有机复合型油层保护液及其制备方法
技术领域
本发明涉及油田化工技术领域,尤其涉及一种抗高温高压有机复合型油层保护液及其制备方法。
背景技术
在油水井施工作业过程中,正确的选用油层保护液不但能够保护地层、油管、套管及井下设备产生二次伤害或损坏,而且能够防止地层空隙堵塞、避免井下设备被腐蚀,能有效地延长地层和油水井使用寿命。近几年,在普通油水井和气井施工作业过程中,大量使用以氯化物为加重剂的保护液,其产生的危害主要包括:一是易造成底层粘土颗粒膨胀或运移、堵塞道孔、降低底层渗透率;二是易与地层水发生作用,生成沉淀不溶物,降低孔隙度;三是易对井下有关套管和设备产生腐蚀,使表面出现大量面蚀和孔蚀,影响使用寿命,特别是在一些气井和试气作业过程中,出现了保护液对油套管腐蚀严重,而且在压井施工过程中保护液向地层倒灌的现象。另外,常规密度的保护液在施工过程中容易造成施工遇阻,尤其是对于低渗、低压、低丰度的“三低”油气藏,与地层不匹配的保护液会对地层造成永久性的伤害。
发明内容
本发明对于上述现有技术的不足,提供了一种抗高温高压有机复合型油层保护液及其制备方法,其型号为:QZ-Ⅲ型。
本发明的抗高温高压有机复合型油层保护液,是由聚丙烯酰胺、氧化型交联剂、无机型促凝剂、水和98%乙醇组成;各组分质量份数为:聚丙烯酰胺3~6份、氧化型交联剂2~5份、无机型促凝剂2~8份、水63~88份和98%乙醇5~18份。
作为本发明的进一步改进,其较佳的各组分质量份数为:聚丙烯酰胺3~5份、氧化交联剂3~5份、无机型促凝剂3~6份、水69~83份和98%乙醇8~15份,所述的氧化交联剂为过氧化二异丙苯或双氧水,无机型促凝剂为亚硝酸钠或亚硫酸钠。
本发明的抗高温高压有机复合型油层保护液的制备方法,步骤如下:
a、将2~5份氧化型交联剂用5~18份的98%乙醇溶解,制成用溶液A;
b、将3~6份聚丙烯酰胺溶解于63~88份、温度为35~60℃的水中、搅拌均匀;
c、在b步骤制得的混合液中加入溶液A,在35~60℃恒温下搅拌1~5小时;
d、将c步骤制得的混合液冷却至20~30℃,加入2~8份无机型促凝剂,搅拌30分钟,即制得成品。
作为本发明的进一步改进,其较佳的制备步骤如下:
a、将3~5份过氧化二异丙苯用8~15份的98%乙醇溶解,制成用溶液A;
b、将3~5聚丙烯酰胺溶解于69~83份、温度为35~55℃的水中、搅拌均匀;
c、在b步骤制得的混合液中加入溶液A,在35~55℃恒温下搅拌1~3小时;
d、将c步骤制得的混合液冷却至25~30℃,加入3~6份亚硝酸钠,搅拌30分钟,即制得成品。
本发明的抗高温高压有机复合型油层保护液,能够适应井下高温高压的恶劣环境,可用作射孔液、洗井液、修井液、注水前置液等,其具有以下特点:
1、产品为无固相均匀液体,密度范围为1.05g/cm3~1.35g/cm3,,适用于不同压力系数的井位井压;
2、产品中,无机防膨组分作用周期长,对储层起到良好的协调保护作用,储层防膨效果好、岩心渗透恢复率高;
3、氯离子含量低于300mg/L,不影响地层测试,同时对井下管柱腐蚀性小,有利于试油气井的地层水分析;
4、不含重金属离子,不易与地层中的碳酸根、硫酸根形成固体不溶物,从而堵塞储层孔隙,降低渗透率,与地下的尤其及地层水配伍性好,对地层污染小,便于施工;
5、具有低粘和低滤失性,减少了保护液应用过程中的倒灌现象;
6、热稳定性好,能够保证在较高地层温度(150~170℃)下有一定粘度和滤失量;耐低温性能优异,-30℃温度条件下,无结晶、聚沉现象。
具体实施方式
实施例1
本发明的抗高温高压有机复合型油层保护液,其型号为:QZ-Ⅲ型,是由聚丙烯酰胺、氧化型交联剂、无机型促凝剂、水和98%乙醇组成;各组分质量份数为:聚丙烯酰胺3份、氧化型交联剂2份、无机型促凝剂2份、水88份和98%乙醇5份。
其制备方法,步骤如下:
a、将2份氧化型交联剂用5份的98%乙醇溶解,制成用溶液A;
b、将3份聚丙烯酰胺溶解于88份、温度为35℃的水中、搅拌均匀;
c、在b步骤制得的混合液中加入溶液A,在35℃恒温下搅拌1小时;
d、将c步骤制得的混合液冷却至20℃,加入2份无机型促凝剂,搅拌30分钟,即制得成品。
实施例2
本发明的抗高温高压有机复合型油层保护液,是由聚丙烯酰胺、过氧化二异丙苯、亚硝酸钠、水和98%乙醇组成;各组分质量份数为:聚丙烯酰胺6份、过氧化二异丙苯5份、亚硝酸钠8份、水63份和98%乙醇18份。
本发明的抗高温高压有机复合型油层保护液的制备方法,步骤如下:
a、将5份过氧化二异丙苯用18份的98%乙醇溶解,制成用溶液A;
b、将6份聚丙烯酰胺溶解于63份、温度为60℃的水中、搅拌均匀;
c、在b步骤制得的混合液中加入溶液A,在60℃恒温下搅拌5小时;
d、将c步骤制得的混合液冷却至30℃,加入8份亚硝酸钠,搅拌30分钟,即制得成品。
实施例3
本发明的抗高温高压有机复合型油层保护液,是由聚丙烯酰胺、双氧水、亚硝酸钠、水和98%乙醇组成;各组分质量份数为:聚丙烯酰胺3份、双氧水3份、亚硝酸钠3份、水83份和98%乙醇8份。
本发明的抗高温高压有机复合型油层保护液的制备方法,步骤如下:
a、将3份双氧水用8份的98%乙醇溶解,制成用溶液A;
b、将3份聚丙烯酰胺溶解于83份、温度为35℃的水中、搅拌均匀;
c、在b步骤制得的混合液中加入溶液A,在35℃恒温下搅拌1小时;
d、将c步骤制得的混合液冷却至25℃,加入3份亚硝酸钠,搅拌30分钟,即制得成品。
实施例4
本发明的抗高温高压有机复合型油层保护液,是由聚丙烯酰胺、过氧化二异丙苯、亚硫酸钠、水和98%乙醇组成;各组分质量份数为:聚丙烯酰胺5份、过氧化二异丙苯5份、亚硫酸钠6份、水69份和98%乙醇15份。
本发明的抗高温高压有机复合型油层保护液的制备方法,步骤如下:
a、将5份过氧化二异丙苯用15份的98%乙醇溶解,制成用溶液A;
b、将5份聚丙烯酰胺溶解于69份、温度为55℃的水中、搅拌均匀;
c、在b步骤制得的混合液中加入溶液A,在55℃恒温下搅拌3小时;
d、将c步骤制得的混合液冷却至30℃,加入6份亚硫酸钠,搅拌30分钟,即制得成品。
实施例5
本发明的抗高温高压有机复合型油层保护液,是由聚丙烯酰胺、双氧水、亚硫酸钠、水和98%乙醇组成;较佳的各组分质量份数为:聚丙烯酰胺4份、双氧水4份、亚硫酸钠5份、水77份和98%乙醇10份。
本发明的抗高温高压有机复合型油层保护液的制备方法,步骤如下:
a、将4份双氧水用10份的98%乙醇溶解,制成用溶液A;
b、将4份聚丙烯酰胺溶解于77份、温度为45℃的水中、搅拌均匀;
c、在b步骤制得的混合液中加入溶液A,在45℃恒温下搅拌2小时;
d、将c步骤制得的混合液冷却至30℃,加入5份亚硫酸钠,搅拌30分钟,即制得成品。

Claims (4)

1.抗高温高压有机复合型油层保护液,其特征在于是由聚丙烯酰胺、氧化型交联剂、无机型促凝剂、水和98%乙醇组成;各组分质量份数为:聚丙烯酰胺3~6份、氧化型交联剂2~5份、无机型促凝剂2~8份、水63~88份和98%乙醇5~18份。
2.如权利要求1所述的抗高温高压有机复合型油层保护液,其特征在于是由聚丙烯酰胺3~5份、氧化交联剂3~5份、无机型促凝剂3~6份、水69~83份和98%乙醇8~15份构成,所述的氧化交联剂为过氧化二异丙苯或双氧水,无机型促凝剂为亚硝酸钠或亚硫酸钠。
3.抗高温高压有机复合型油层保护液的制备方法,步骤如下:
a、将2~5份氧化型交联剂用5~18份的98%乙醇溶解,制成用溶液A;
b、将3~6份聚丙烯酰胺溶解于63~88份、温度为35~60℃的水中、搅拌均匀;
c、在b步骤制得的混合液中加入溶液A,在35~60℃恒温下搅拌1~5小时;
d、将c步骤制得的混合液冷却至20~30℃,加入2~8份无机型促凝剂,搅拌30分钟,即制得成品。
4.如权利要求3所述的抗高温高压有机复合型油层保护液的制备方法,其特征在于较佳的制备步骤如下:
a、将3~5份过氧化二异丙苯用8~15份的98%乙醇溶解,制成用溶液A;
b、将3~5聚丙烯酰胺溶解于69~83份、温度为35~55℃的水中、搅拌均匀;
c、在b步骤制得的混合液中加入溶液A,在35~55℃恒温下搅拌1~3小时;
d、将c步骤制得的混合液冷却至25~30℃,加入3~6份亚硝酸钠,搅拌30分钟,即制得成品。
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN108003851A (zh) * 2018-01-12 2018-05-08 中国海洋石油集团有限公司 一种钻井液用提切剂及其制备方法
CN108384523A (zh) * 2018-03-07 2018-08-10 中石化石油工程技术服务有限公司 一种高温高密度高稳定性工作液

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