CN106967536A - 砂岩类原油驱替实验岩心洗油剂及其制备方法 - Google Patents

砂岩类原油驱替实验岩心洗油剂及其制备方法 Download PDF

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CN106967536A
CN106967536A CN201710198100.3A CN201710198100A CN106967536A CN 106967536 A CN106967536 A CN 106967536A CN 201710198100 A CN201710198100 A CN 201710198100A CN 106967536 A CN106967536 A CN 106967536A
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孙启冀
何振南
刘洋
曹海宇
姜丽娟
李梦越
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Abstract

本发明涉及的是砂岩类原油驱替实验岩心洗油剂及其制备方法,其中的砂岩类原油驱替实验岩心洗油剂由200#溶剂油、稳定剂、抗氧化添加剂、抗溶胀剂、金属防腐蚀剂、助溶剂制备而成,按质量百分比计,200#溶剂油90—96%;稳定剂1—4%;抗溶胀剂0.6—2.5%;抗氧化添加剂0.5—2.5%;金属防腐蚀剂0.1—2%;助溶剂0.1—1%,200#溶剂油为140℃‑200℃的石油馏分组成。本发明用于室内岩心实验的洗油过程中,对于岩心夹持器内的胶套的溶胀作用小,能够提升胶套的使用寿命;毒性小对环境污染小;洗油效果在中、低渗透砂岩中比水基型清洗剂有很大的提高。

Description

砂岩类原油驱替实验岩心洗油剂及其制备方法
技术领域
本发明涉及油田开发方案设计中室内岩心驱替实验洗油中使用的洗油剂,具体涉及砂岩类原油驱替实验岩心洗油剂及其制备方法。
背景技术
室内岩心实验是确定油田开发方案的一种关键物理模拟手段,对于油田开发生产规律的研究有着非常重要的指导意义。在开发一个区块前,需要利用钻井取心得到的岩心样本进行室内岩心驱替实验,由此得到该区块的生产规律,为后续的全面开发提供理论依据。所以岩心驱替实验中需要利用同一块岩心进行多次的实验,找到最佳的开发方案。这就不可避免的要对岩心样本进行多次的清洗排油。目前,国内岩心洗油溶剂主要有两种,一种是广泛采用的甲苯,其特点在于对石油的萃取和溶解能力强,洗油效果好,但甲苯毒性较大,在室温下容易挥发,操作时需要特殊的密闭实验容器,如果操作不当容易导致实验人员中毒。另一种是水基型清洗剂,这种清洗剂对于高渗透岩心具有一定的清洗效果,对于低渗透岩心则由于清洗剂分子团尺寸过大无法进入岩心内部的喉道及部分角隅造成岩心内部的残余油无法洗出。此类清洗剂的主要成分为表面活性剂通过改变油水界面张力达到洗油的目的,优点是毒性较低成本低,但洗油效果没有甲苯强,并且容易起泡还会引起岩心夹持器内的胶套溶胀脆化,导致驱替实验密封胶套的使用寿命下降,最重要的是此类清洗剂会改变岩石表面的润湿性,对岩心造成不可逆的影响,降低实验的准确度。
发明内容
本发明的目的是提供砂岩类原油驱替实验岩心洗油剂,这种砂岩类原油驱替实验岩心洗油剂用于解决甲苯洗油过程中毒性大的问题和水基型清洗剂的起泡对细小喉道清洗不彻底及对岩心夹持器胶套的溶胀老化问题,本发明的另一个目的是提供这种砂岩类原油驱替实验岩心洗油剂的制备方法。
本发明解决其技术问题所采用的技术方案是:这种砂岩类原油驱替实验岩心洗油剂由200#溶剂油、稳定剂、抗氧化添加剂、抗溶胀剂、金属防腐蚀剂、助溶剂制备而成,按质量百分比计,200#溶剂油 90—96%;稳定剂1—4%;抗溶胀剂0.6—2.5%;抗氧化添加剂0.5—2.5%;金属防腐蚀剂0.1—2%;助溶剂0.1—1%,200#溶剂油为140℃-200℃的石油馏分组成。
上述方案中稳定剂由丙三醇、正庚烷、异构十三醇、丁二醇、己二醇、异辛醇构成,按质量百分比计:丙三醇10~30%,正庚烷10~30%,异构十三醇10~30%,丁二醇10~35%,己二醇10~30%,异辛醇5%~20%。
上述方案中抗氧化添加剂由二烷基二硫代磷酸锌、2,6-二叔丁基对甲酚构成,按质量百分比计:二烷基二硫代磷酸锌32~75%,2,6-二叔丁基对甲酚27~65%,二者的质量百分比之和为100%。
上述方案中抗溶胀剂由甲基苯并三氮唑、癸二酸二丁酯、二乙二醇醚构成,按质量百分比计:甲基苯并三氮唑17~42%,癸二酸二丁酯15~35%,二乙二醇醚20~60%。
上述方案中金属防腐蚀剂由甲基苯并三氮唑、聚赖氨酸、石油醚构成,按质量百分比计:甲基苯并三氮唑35~50%、聚赖氨酸25~45%、石油醚20~50%。
上述方案中助溶剂由异丁醇、异丙醇构成,按质量百分比计:异丁醇30~70%、异丙醇30~70%,二者的质量百分比之和为100%。
上述砂岩类原油驱替实验岩心洗油剂的制备方法:
步骤一、按质量百分比计,将200#溶剂油90—96%、稳定剂1—4%、助溶剂0.1—1%,加入钢制容器中,在常温常压下磁力搅拌机搅拌5分钟,得到溶液A;
步骤二、按质量百分比计,将抗溶胀剂0.6—2.5%、金属防腐蚀剂0.1—2%、抗氧化添加剂0.5—2.5%加入钢制容器中,在常温常压下用磁力搅拌机搅拌5分钟,得到溶液B;
步骤三、将步骤一得到的溶液A和步骤二得到的溶液B加入钢制容器中,在常温常压下磁力搅拌机以小于100r/min的速度搅拌5分钟以上,充分混合均匀得到砂岩类原油驱替实验岩心洗油剂。
本发明具有以下有益效果:
1.本发明用于室内岩心实验的洗油过程中,对于岩心夹持器内的胶套的溶胀作用小,能够提升胶套的使用寿命。
2.本发明相对于甲苯类洗油剂而言,具有毒性小对环境污染小的特点,洗油原理与甲苯类清洗剂一样利用溶液对有机质的萃取作用,洗油效果在高、中、低渗透砂岩中与甲苯类清洗剂类似,相对于水基型清洗剂具有腐蚀性小、不起泡的特点,洗油效果在中、低渗透砂岩中比水基型清洗剂有很大的提高。
3.本发明在岩心内部扩散性能好,能侵入细小的喉道,且清洗过程中不发生起泡。
4.本发明的制备方法简单,对于制备温度要求较低便于操作。
附图说明:
图1为水基型洗油剂清洗效果图;
图2为甲苯清洗岩心效果图;
图3为本发明洗油剂洗油效果图。
具体实施方式
下面对本发明作进一步的说明:
实施例1:
这种砂岩类原油驱替实验岩心洗油剂由200#溶剂油、稳定剂、抗氧化添加剂、抗溶胀剂、金属防腐蚀剂、助溶剂制备而成,按质量百分比计,200#溶剂油93%;稳定剂4%;抗溶胀剂1%;抗氧化添加剂1%;金属防腐蚀剂0.5%;助溶剂0.5%,200#溶剂油为140℃-200℃的石油馏分组成。
按质量百分比计,稳定剂由丙三醇17%,正庚烷19%,异构十三醇21%,丁二醇13%,己二醇18%,异辛醇12%构成;抗溶胀剂由甲基苯并三氮唑22%、癸二酸二丁酯25%、二乙二醇醚53%构成;抗氧化添加剂由二烷基二硫代磷酸锌35%,2,6-二叔丁基对甲酚65%构成; 金属防腐蚀剂由甲基苯并三氮唑30%,聚赖氨酸40%,石油醚30%构成;助溶剂由异丁醇35%,异丙醇65%构成。
这种砂岩类原油驱替实验岩心洗油剂常温下溶解混合而成:①将200#溶剂油、稳定剂、助溶剂加入钢制容器中,在常温常压下磁力搅拌机搅拌5分钟,得到溶液A;②将抗溶胀剂、金属防腐蚀剂、抗氧化添加剂加入钢制容器中,在常温常压下用磁力搅拌机搅拌5分钟,得到溶液B;③将溶液A和溶液B加入钢制容器中,在常温常压下磁力搅拌机以小于100r/min的速度搅拌5分钟以上,充分混合得到砂岩类原油驱替实验岩心洗油剂。
实施例2:
这种砂岩类原油驱替实验岩心洗油剂由200#溶剂油、稳定剂、抗氧化添加剂、抗溶胀剂、金属防腐蚀剂、助溶剂制备而成,按质量百分比计,200#溶剂油94%;稳定剂3%;抗溶胀剂1%;抗氧化添加剂1%;金属防腐蚀剂0.5%;助溶剂0.5%,200#溶剂油为140℃-200℃的石油馏分组成。
按质量百分比计,稳定剂由丙三醇25%,正庚烷17%,异构十三醇13%,丁二醇15%,己二醇22%,异辛醇8%构成;抗溶胀剂由甲基苯并三氮唑30%、癸二酸二丁酯30%、二乙二醇醚40%构成;抗氧化添加剂由二烷基二硫代磷酸锌65%,2,6-二叔丁基对甲酚35%构成; 金属防腐蚀剂由甲基苯并三氮唑40%,聚赖氨酸30%,石油醚30%构成;助溶剂由异丁醇60%,异丙醇40%构成。
这种砂岩类原油驱替实验岩心洗油剂常温下溶解混合而成:①将200#溶剂油、稳定剂、助溶剂加入钢制容器中,在常温常压下磁力搅拌机搅拌5分钟得到,溶液A;②将抗溶胀剂、金属防腐蚀剂、抗氧化剂加入钢制容器中,在常温常压下用磁力搅拌机搅拌5分钟,得到溶液B;③将溶液A和溶液B加入钢制容器中,在常温常压下磁力搅拌机以小于100r/min的速度搅拌5分钟以上,充分混合得到砂岩类原油驱替实验岩心洗油剂。
实施例3:
这种砂岩类原油驱替实验岩心洗油剂由200#溶剂油、稳定剂、抗氧化添加剂、抗溶胀剂、金属防腐蚀剂、助溶剂制备而成,按质量百分比计,200#溶剂油95%;稳定剂2%;抗溶胀剂1%;抗氧化添加剂1%;金属防腐蚀剂0.5%;助溶剂0.5%,200#溶剂油为140℃-200℃的石油馏分组成。
按质量百分比计,稳定剂由丙三醇23%,正庚烷21%,异构十三醇18%,丁二醇11%,己二醇16%,异辛醇11%构成;抗溶胀剂由甲基苯并三氮唑40%、癸二酸二丁酯30%、二乙二醇醚30%构成;抗氧化添加剂由二烷基二硫代磷酸锌45%,2,6-二叔丁基对甲酚55%构成; 金属防腐蚀剂由甲基苯并三氮唑30%,聚赖氨酸30%,石油醚40%构成;助溶剂由异丁醇40%,异丙醇60%构成。
这种砂岩类原油驱替实验岩心洗油剂常温下溶解混合而成:①将200#溶剂油、稳定剂、助溶剂加入钢制容器中,在常温常压下磁力搅拌机搅拌5分钟,得到溶液A;②将抗溶胀剂、金属防腐蚀剂、抗氧化剂加入钢制容器中,在常温常压下用磁力搅拌机搅拌5分钟,得到溶液B;③将溶液A和溶液B加入钢制容器中,在常温常压下磁力搅拌机以小于100r/min的速度搅拌5分钟以上,充分混合得到砂岩类原油驱替实验岩心洗油剂。
实施例4:
这种砂岩类原油驱替实验岩心洗油剂由200#溶剂油、稳定剂、抗氧化添加剂、抗溶胀剂、金属防腐蚀剂、助溶剂制备而成,按质量百分比计,200#溶剂油96%;稳定剂1%;抗溶胀剂1%;抗氧化添加剂1%;金属防腐蚀剂0.5%;助溶剂0.5%,200#溶剂油为140℃-200℃的石油馏分组成。
按质量百分比计,稳定剂由丙三醇17%,正庚烷19%,异构十三醇23%,丁二醇14%,己二醇18%,异辛醇9%构成;抗溶胀剂由甲基苯并三氮唑35%、癸二酸二丁酯35%、二乙二醇醚30%构成;抗氧化添加剂由二烷基二硫代磷酸锌60%,2,6-二叔丁基对甲酚40%构成; 金属防腐蚀剂由甲基苯并三氮唑35%,聚赖氨酸35%,石油醚30%构成;助溶剂由异丁醇35%,异丙醇65%构成。
这种砂岩类原油驱替实验岩心洗油剂常温下溶解混合而成:①将200#溶剂油、稳定剂、助溶剂加入钢制容器中,在常温常压下磁力搅拌机搅拌5分钟,得到溶液A;②将抗溶胀剂、金属防腐蚀剂、抗氧化剂加入钢制容器中,在常温常压下用磁力搅拌机搅拌5分钟,得到溶液B;③将溶液A和溶液B加入钢制容器中,在常温常压下磁力搅拌机以小于100r/min的速度搅拌5分钟以上,充分混合得到砂岩类原油驱替实验岩心洗油剂。

Claims (7)

1.一种砂岩类原油驱替实验岩心洗油剂,其特征在于:这种砂岩类原油驱替实验岩心洗油剂由200#溶剂油、稳定剂、抗氧化添加剂、抗溶胀剂、金属防腐蚀剂、助溶剂制备而成,按质量百分比计,200#溶剂油 90—96%;稳定剂1—4%;抗溶胀剂0.6—2.5%;抗氧化添加剂0.5—2.5%;金属防腐蚀剂0.1—2%;助溶剂0.1—1%,200#溶剂油为140℃-200℃的石油馏分组成。
2.根据权利要求1所述的砂岩类原油驱替实验岩心洗油剂,其特征在于:所述的稳定剂由丙三醇、正庚烷、异构十三醇、丁二醇、己二醇、异辛醇构成,按质量百分比计:丙三醇10~30%,正庚烷10~30%,异构十三醇10~30%,丁二醇10~35%,己二醇10~30%,异辛醇5%~20%。
3.根据权利要求2所述的砂岩类原油驱替实验岩心洗油剂,其特征在于:所述的抗氧化添加剂由二烷基二硫代磷酸锌、2,6-二叔丁基对甲酚构成,按质量百分比计:二烷基二硫代磷酸锌32~75%,2,6-二叔丁基对甲酚27~65%,二者的质量百分比之和为100%。
4.根据权利要求3所述的砂岩类原油驱替实验岩心洗油剂,其特征在于:所述的抗溶胀剂由甲基苯并三氮唑、癸二酸二丁酯、二乙二醇醚构成,按质量百分比计:甲基苯并三氮唑17~42%,癸二酸二丁酯15~35%,二乙二醇醚20~60%。
5.根据权利要求4所述的砂岩类原油驱替实验岩心洗油剂,其特征在于:所述的金属防腐蚀剂由甲基苯并三氮唑、聚赖氨酸、石油醚构成,按质量百分比计:甲基苯并三氮唑35~50%、聚赖氨酸25~45%、石油醚20~50%。
6.根据权利要求5所述的砂岩类原油驱替实验岩心洗油剂,其特征在于:所述的助溶剂由异丁醇、异丙醇构成,按质量百分比计:异丁醇30~70%、异丙醇30~70%,二者的质量百分比之和为100%。
7.一种权利要求6所述的砂岩类原油驱替实验岩心洗油剂的制备方法,其特征在于:
步骤一、按质量百分比计,将200#溶剂油90—96%、稳定剂1—4%、助溶剂0.1—1%,加入钢制容器中,在常温常压下磁力搅拌机搅拌5分钟,得到溶液A;
步骤二、按质量百分比计,将抗溶胀剂0.6—2.5%、金属防腐蚀剂0.1—2%、抗氧化添加剂0.5—2.5%加入钢制容器中,在常温常压下用磁力搅拌机搅拌5分钟,得到溶液B;
步骤三、将步骤一得到的溶液A和步骤二得到的溶液B加入钢制容器中,在常温常压下磁力搅拌机以小于100r/min的速度搅拌5分钟以上,充分混合均匀得到砂岩类原油驱替实验岩心洗油剂。
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