CN109534793A - 含假蓝宝石晶体的低密度石油压裂支撑剂及其制备方法 - Google Patents
含假蓝宝石晶体的低密度石油压裂支撑剂及其制备方法 Download PDFInfo
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- 229910001753 sapphirine Inorganic materials 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000004927 clay Substances 0.000 claims abstract description 45
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 32
- 239000002131 composite material Substances 0.000 claims abstract description 31
- 229910052623 talc Inorganic materials 0.000 claims abstract description 29
- 239000000454 talc Substances 0.000 claims abstract description 29
- 235000012222 talc Nutrition 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 26
- 229910052681 coesite Inorganic materials 0.000 claims description 45
- 229910052906 cristobalite Inorganic materials 0.000 claims description 45
- 239000000377 silicon dioxide Substances 0.000 claims description 45
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 45
- 229910052682 stishovite Inorganic materials 0.000 claims description 45
- 229910052905 tridymite Inorganic materials 0.000 claims description 45
- 239000002245 particle Substances 0.000 claims description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 30
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- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims description 15
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 15
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- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明公开了含假蓝宝石晶体的低密度石油压裂支撑剂及其制备方法。该陶粒石油压裂支撑剂含硬度较高、性能优异假蓝宝石晶体结构,且视密度<2.80g·cm‑3,按照重量比,由30~50份的滑石、40~60份的铝矾土、1~5份的粘土和5~15份的复合矿化剂按照一定比例混合,再制成球料,烧结温度为1300~1340℃,保温时间为15~30分钟,产品自然冷却至室温。制作出的成品在30~50目时,52MPa下破碎率<8%。具有抗压强度高、密度低、生产成本低等优点。
Description
技术领域
本发明石油支撑剂技术领域,具体涉及一种含假蓝宝石晶体的低密度石油压裂支撑剂及其制备方法。
背景技术
陶粒压裂支撑剂是以铝矾土为主要原料,通过各种加工工艺,烧结制备而成的一种颗粒。其使用过程如下:在高压泵的作用下,陶粒压裂支撑剂与压裂液一起被注入粘附到地层的裂缝岩壁上,在裂缝闭合之前撑开裂缝,汇集成一个高导流通道,使地层油气沿着通道流向地面。
一直以来石油支撑剂通常是采用高铝原料(如高铝矾土)作为主要原料生产。目前,随着铝矾土资源的日益减少,人们已越来越多地开始尝试采用包括粉煤灰、煤矸石等在内的各种固体废弃物。冶炼高碳铬铁合金尾渣是一种用大小不同粒度铬矿混合,在矿热炉1800℃~2000℃的高温熔炼将高碳铬铁合金提取后剩下的固体结晶体,其主要物相是镁铝尖晶石,呈黑色颗粒状。冶炼高碳铬铁合金尾渣中含有有毒的Cr6+离子,它的大量堆放,不仅会危害环境,还会危害人的身体健康。虽然人们在治理冶炼高碳铬铁合金尾渣中提出很多办法,但并没有从根本上解决问题。目前并没有以冶炼高碳铬铁合金尾渣为主要原料制备石油压裂支撑剂,根据冶炼高碳铬铁合金尾渣化学组成特点,配合铝矾土、粘土和复合矿化剂制备石油压裂支撑剂对于降低成本和环境保护具有十分重要的意义。
发明内容
本发明提供了含假蓝宝石晶体的低密度石油压裂支撑剂,其特征在于:按照重量比,由30~50份的滑石、40~60份的铝矾土、1~5份的粘土和5~15份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照重量比为0~20:10~20:20~40:0~15:5~25的比例混合而成,该陶粒石油压裂支撑剂视密度<2.80g·cm-3。
滑石由SiO2和MgO组成,SiO2的质量百分含量为60%~65%,MgO的质量百分含量为28~33%,烧失量为3%~7%,以上组分百分比之和为100%。
铝矾土由SiO2和Al2O3组成,SiO2的质量百分含量为8%~10%,Al2O3的质量百分含量为68%~72%,烧失量为12%~14%,以上组分百分比之和为100%。
粘土为一种结合力强的塑性粘土,具体由SiO2和Al2O3组成,SiO2的质量百分含量为40%~45%,Al2O3的质量百分含量为35%~40%,烧失量为12%~14%,以上组分百分比之和为100%。
5.根据权利要求1~4任一项所述的含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法,其具体步骤如下:
步骤1:按照重量比,称取30~50份的滑石、40~60份的铝矾土、1~5份的粘土和5~15份的复合矿化剂,进行混料;
步骤2:将混料后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;
步骤3:将步骤二中球磨后得到的细粉导入成球机中,然后一边喷洒雾化水一边使细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状支撑剂颗粒;
步骤4:步骤3所得的支撑剂颗粒烧制成型得到产品。
步骤4中,烧制成型具体为:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以10~12℃/min的升温速率将温度升高到1200℃,而后以1~2℃/min的升温速率将温度升高到1300~1340℃,并保温15~30min,最后自然冷却至常温即制得产品。
步骤1中,复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照重量比为0~20:10~20:20~40:0~15:5~25的比例混合而成。
与现有技术相比,本发明具有以下有益的技术效果:
本发明提供的含假蓝宝石晶体的低密度石油压裂支撑剂改进了原料、辅料的成分及配比,且适量粘土的加入能有效加强成品的圆球度,提升成品的倒流能力;同时加入复合矿化剂有利于低温烧结,进一步降低生产成本。制作出的成品在30~50目时,52MPa下破碎率<8%,视密度<2.8g·cm-3。具有抗压强度高、密度低、生产成本低等优点。
附图说明
图1图1是假蓝宝石陶粒XRD衍射图。
具体实施方式
下面结合具体的实施例对本发明做进一步的详细说明,所述是对本发明的解释而不是限定。
含假蓝宝石晶体的低密度石油压裂支撑剂,其特征在于:按照重量比,由30~50份的滑石、40~60份的铝矾土、1~5份的粘土和5~15份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照重量比为0~20:10~20:20~40:0~15:5~25的比例混合而成,该陶粒石油压裂支撑剂视密度<2.80g·cm-3。
滑石由SiO2和MgO组成,SiO2的质量百分含量为60%~65%,MgO的质量百分含量为28~33%,烧失量为3%~7%,以上组分百分比之和为100%。
铝矾土由SiO2和Al2O3组成,SiO2的质量百分含量为8%~10%,Al2O3的质量百分含量为68%~72%,烧失量为12%~14%,以上组分百分比之和为100%。
粘土为一种结合力强的塑性粘土,具体由SiO2和Al2O3组成,SiO2的质量百分含量为40%~45%,Al2O3的质量百分含量为35%~40%,烧失量为12%~14%,以上组分百分比之和为100%。
含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法,其具体步骤如下:
步骤1:按照重量比,称取30~50份的滑石、40~60份的铝矾土、1~5份的粘土和5~15份的复合矿化剂,进行混料;
步骤2:将混料后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;
步骤3:将步骤二中球磨后得到的细粉导入成球机中,然后一边喷洒雾化水一边使细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状支撑剂颗粒;
步骤4:步骤3所得的支撑剂颗粒烧制成型得到产品。
步骤4中,烧制成型具体为:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以10~12℃/min的升温速率将温度升高到1200℃,而后以1~2℃/min的升温速率将温度升高到1300~1340℃,并保温15~30min,最后自然冷却至常温即制得产品。
步骤1中,复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照重量比为0~20:10~20:20~40:0~15:5~25的比例混合而成。
在本发明中,以滑石和铝矾土为原料,配合粘土和复合矿化剂,同时对混合料进行球磨处理,从而保证了在陶瓷系统中引入强度和硬度大于莫来石相的假蓝宝石晶体,达到支撑剂的使用性能指标。另外,与粘土配合作用,可有效保证支撑剂半成品(生料球)的强度和表面硬度,有利于防止生料球在输送和干燥过程中产生脱粉、继而导致表面粗糙、圆球度降低。最后,适量比例的复合矿化剂能有效的降低陶粒石油压裂支撑剂的烧结温度,降低生产成本。
实施例1
一种含假蓝宝石晶体的低密度石油压裂支撑剂,该陶粒石油压裂支撑剂含硬度较高、性能优异假蓝宝石晶体结构,且视密度<2.80g·cm-3,按照重量比,由30份的滑石、60份的铝矾土、4份的粘土和6份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照0:10:20:0:5的比例混合而成。
所述滑石中,SiO2的质量百分含量为60%,MgO的质量百分含量为28%,烧失量为3%。
所述铝矾土中,SiO2的质量百分含量为8%,Al2O3的质量百分含量为68%,烧失量为12%。
所述粘土为一种结合力强的塑性粘土,其中,SiO2的质量百分含量为43%,Al2O3的质量百分含量为35%,烧失量为12%。
上述含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法。首先,按照所述的比例选用并称取各组成物料进行混料,将处理后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;将球磨后得到的细粉导入成球机中,然后边喷洒雾化水边使超细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状颗粒,最后烧制成型。烧制成型是指:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以12℃/min的升温速率将温度升高到1200℃,而后以2℃/min的升温速率将温度升高到1340℃,并保温30min,最后自然冷却至常温即制得产品。
实施例2
一种含假蓝宝石晶体的低密度石油压裂支撑剂,该陶粒石油压裂支撑剂含硬度较高、性能优异假蓝宝石晶体结构,且视密度<2.80g·cm-3,按照重量比,由40份的滑石、50份的铝矾土、4份的粘土和6份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照2:11:22:2:7的比例混合而成。
所述滑石中,SiO2的质量百分含量为61%,MgO的质量百分含量为29%,烧失量为4%。
所述铝矾土中,SiO2的质量百分含量为9%,Al2O3的质量百分含量为70%,烧失量为13%。
所述粘土为一种结合力强的塑性粘土,其中,SiO2的质量百分含量为40%,Al2O3的质量百分含量为35%,烧失量为14%。
上述含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法。首先,按照所述的比例选用并称取各组成物料进行混料,将处理后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;将球磨后得到的细粉导入成球机中,然后边喷洒雾化水边使超细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状颗粒,最后烧制成型。烧制成型是指:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以12℃/min的升温速率将温度升高到1200℃,而后以2℃/min的升温速率将温度升高到1340℃,并保温30min,最后自然冷却至常温即制得产品。
实施例3
一种含假蓝宝石晶体的低密度石油压裂支撑剂,该陶粒石油压裂支撑剂含硬度较高、性能优异假蓝宝石晶体结构,且视密度<2.80g·cm-3,按照重量比,由50份的滑石、40份的铝矾土、4份的粘土和6份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照5:15:30:7:15的比例混合而成。
所述滑石中,SiO2的质量百分含量为64%,MgO的质量百分含量为29%,烧失量为6%。
所述铝矾土中,SiO2的质量百分含量为10%,Al2O3的质量百分含量为70%,烧失量为13%。
所述粘土为一种结合力强的塑性粘土,其中,SiO2的质量百分含量为43%,Al2O3的质量百分含量为37%,烧失量为13%。
上述含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法。首先,按照所述的比例选用并称取各组成物料进行混料,将处理后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;将球磨后得到的细粉导入成球机中,然后边喷洒雾化水边使超细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状颗粒,最后烧制成型。烧制成型是指:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以12℃/min的升温速率将温度升高到1200℃,而后以2℃/min的升温速率将温度升高到1340℃,并保温30min,最后自然冷却至常温即制得产品。
实施例4
一种含假蓝宝石晶体的低密度石油压裂支撑剂,该陶粒石油压裂支撑剂含硬度较高、性能优异假蓝宝石晶体结构,且视密度<2.80g·cm-3,按照重量比,由49份的滑石、40份的铝矾土、4份的粘土和7份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照15:13:28:14:21的比例混合而成。
所述滑石中,SiO2的质量百分含量为65%,MgO的质量百分含量为30%,烧失量为6%。
所述铝矾土中,SiO2的质量百分含量为9%,Al2O3的质量百分含量为69%,烧失量为13%。
所述粘土为一种结合力强的塑性粘土,其中,SiO2的质量百分含量为43%,Al2O3的质量百分含量为37%,烧失量为12%。
上述含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法。首先,按照所述的比例选用并称取各组成物料进行混料,将处理后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;将球磨后得到的细粉导入成球机中,然后边喷洒雾化水边使超细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状颗粒,最后烧制成型。烧制成型是指:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以12℃/min的升温速率将温度升高到1200℃,而后以2℃/min的升温速率将温度升高到1340℃,并保温30min,最后自然冷却至常温即制得产品。
实施例5
一种含假蓝宝石晶体的低密度石油压裂支撑剂,该陶粒石油压裂支撑剂含硬度较高、性能优异假蓝宝石晶体结构,且视密度<2.80g·cm-3,按照重量比,由49份的滑石、40份的铝矾土、4份的粘土和7份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照18:20:35:11:7的比例混合而成。
所述滑石中,SiO2的质量百分含量为63%,MgO的质量百分含量为33%,烧失量为5%。
所述铝矾土中,SiO2的质量百分含量为10%,Al2O3的质量百分含量为71%,烧失量为13%。
所述粘土为一种结合力强的塑性粘土,其中,SiO2的质量百分含量为40%,Al2O3的质量百分含量为38%,烧失量为13%。
上述含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法。首先,按照所述的比例选用并称取各组成物料进行混料,将处理后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;将球磨后得到的细粉导入成球机中,然后边喷洒雾化水边使超细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状颗粒,最后烧制成型。烧制成型是指:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以12℃/min的升温速率将温度升高到1200℃,而后以2℃/min的升温速率将温度升高到1320℃,并保温30min,最后自然冷却至常温即制得产品。
实施例6
一种含假蓝宝石晶体的低密度石油压裂支撑剂,该陶粒石油压裂支撑剂含硬度较高、性能优异假蓝宝石晶体结构,且视密度<2.80g·cm-3,按照重量比,由49份的滑石、40份的铝矾土、4份的粘土和7份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照11:19:31:14:23的比例混合而成。
所述滑石中,SiO2的质量百分含量为65%,MgO的质量百分含量为27%,烧失量为5%。
所述铝矾土中,SiO2的质量百分含量为8%,Al2O3的质量百分含量为69%,烧失量为14%。
所述粘土为一种结合力强的塑性粘土,其中,SiO2的质量百分含量为42%,Al2O3的质量百分含量为39%,烧失量为12%。
上述含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法。首先,按照所述的比例选用并称取各组成物料进行混料,将处理后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;将球磨后得到的细粉导入成球机中,然后边喷洒雾化水边使超细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状颗粒,最后烧制成型。烧制成型是指:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以12℃/min的升温速率将温度升高到1200℃,而后以2℃/min的升温速率将温度升高到1300℃,并保温30min,最后自然冷却至常温即制得产品。
实施例7
一种含假蓝宝石晶体的低密度石油压裂支撑剂,该陶粒石油压裂支撑剂含硬度较高、性能优异假蓝宝石晶体结构,且视密度<2.80g·cm-3,按照重量比,由49份的滑石、40份的铝矾土、4份的粘土和7份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照7:17:31:8:13的比例混合而成。
所述滑石中,SiO2的质量百分含量为64%,MgO的质量百分含量为28%,烧失量为4%。
所述铝矾土中,SiO2的质量百分含量为8%,Al2O3的质量百分含量为69%,烧失量为12%。
所述粘土为一种结合力强的塑性粘土,其中,SiO2的质量百分含量为43%,Al2O3的质量百分含量为39%,烧失量为13%。
上述含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法。首先,按照所述的比例选用并称取各组成物料进行混料,将处理后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;将球磨后得到的细粉导入成球机中,然后边喷洒雾化水边使超细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状颗粒,最后烧制成型。烧制成型是指:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以12℃/min的升温速率将温度升高到1200℃,而后以2℃/min的升温速率将温度升高到1340℃,并保温15min,最后自然冷却至常温即制得产品。
实施例8
一种含假蓝宝石晶体的低密度石油压裂支撑剂,该陶粒石油压裂支撑剂含硬度较高、性能优异假蓝宝石晶体结构,且视密度<2.80g·cm-3,按照重量比,由49份的滑石、40份的铝矾土、4份的粘土和7份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照13:16:33:12:7)的比例混合而成。
所述滑石中,SiO2的质量百分含量为64%,MgO的质量百分含量为28%,烧失量为5%。
所述铝矾土中,SiO2的质量百分含量为8%,Al2O3的质量百分含量为70%,烧失量为14%。
所述粘土为一种结合力强的塑性粘土,其中,SiO2的质量百分含量为44%,Al2O3的质量百分含量为38%,烧失量为14%。
上述含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法。首先,按照所述的比例选用并称取各组成物料进行混料,将处理后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;将球磨后得到的细粉导入成球机中,然后边喷洒雾化水边使超细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状颗粒,最后烧制成型。烧制成型是指:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以12℃/min的升温速率将温度升高到1200℃,而后以1℃/min的升温速率将温度升高到1340℃,并保温30min,最后自然冷却至常温即制得产品。
实施例9
一种含假蓝宝石晶体的低密度石油压裂支撑剂,该陶粒石油压裂支撑剂含硬度较高、性能优异假蓝宝石晶体结构,且视密度<2.80g·cm-3,按照重量比,由49份的滑石、40份的铝矾土、4份的粘土和7份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照3:15:30:11:14)的比例混合而成。
所述滑石中,SiO2的质量百分含量为64%,MgO的质量百分含量为29%,烧失量为5%。
所述铝矾土中,SiO2的质量百分含量为8%~10%,Al2O3的质量百分含量为68%,烧失量为13%。
所述粘土为一种结合力强的塑性粘土,其中,SiO2的质量百分含量为41%,Al2O3的质量百分含量为36%,烧失量为14%。
上述含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法。首先,按照所述的比例选用并称取各组成物料进行混料,将处理后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;将球磨后得到的细粉导入成球机中,然后边喷洒雾化水边使超细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状颗粒,最后烧制成型。烧制成型是指:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以10℃/min的升温速率将温度升高到1200℃,而后以2℃/min的升温速率将温度升高到1340℃,并保温30min,最后自然冷却至常温即制得产品。
本发明提供的含假蓝宝石晶体的低密度石油压裂支撑剂改进了原料、辅料的成分及配比,且适量粘土的加入能有效加强成品的圆球度,提升成品的倒流能力;同时加入复合矿化剂有利于低温烧结,进一步降低生产成本。制作出的成品在30~50目时,52MPa下破碎率<8%,视密度<2.8g·cm-3。具有抗压强度高、密度低、生产成本低等优点。
Claims (7)
1.含假蓝宝石晶体的低密度石油压裂支撑剂,其特征在于:按照重量比,由30~50份的滑石、40~60份的铝矾土、1~5份的粘土和5~15份的复合矿化剂烧制而成,所述复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照重量比为0~20:10~20:20~40:0~15:5~25的比例混合而成,该陶粒石油压裂支撑剂视密度<2.80g·cm-3。
2.根据权利要求1所述的含假蓝宝石晶体的低密度石油压裂支撑剂,其特征在于:所述滑石由SiO2和MgO组成,SiO2的质量百分含量为60%~65%,MgO的质量百分含量为28~33%,烧失量为3%~7%,以上组分百分比之和为100%。
3.根据权利要求1所述的含假蓝宝石晶体的低密度石油压裂支撑剂,其特征在于:所述铝矾土由SiO2和Al2O3组成,SiO2的质量百分含量为8%~10%,Al2O3的质量百分含量为68%~72%,烧失量为12%~14%,以上组分百分比之和为100%。
4.根据权利要求1所述的含假蓝宝石晶体的低密度石油压裂支撑剂,其特征在于:所述粘土为一种结合力强的塑性粘土,具体由SiO2和Al2O3组成,SiO2的质量百分含量为40%~45%,Al2O3的质量百分含量为35%~40%,烧失量为12%~14%,以上组分百分比之和为100%。
5.根据权利要求1~4任一项所述的含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法,其具体步骤如下:
步骤1:按照重量比,称取30~50份的滑石、40~60份的铝矾土、1~5份的粘土和5~15份的复合矿化剂,进行混料;
步骤2:将混料后的各组成原料按照比例混合后进行球磨,直至混合料的粒径D50达到3.4μm,粒径分布在1~8μm;
步骤3:将步骤2中球磨后得到的细粉导入成球机中,然后一边喷洒雾化水一边使细粉随成球机旋转,使之逐步团聚成球,最终成为质地密实、表面光滑的球状支撑剂颗粒;
步骤4:将步骤3所得的支撑剂颗粒烧制成型得到产品。
6.根据权利要求5所述的含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法,其特征在于:所述步骤4中,烧制成型具体为:将造好的支撑剂颗粒送入窑炉内,在空气气氛中,先以10~12℃/min的升温速率将温度升高到1200℃,而后以1~2℃/min的升温速率将温度升高到1300~1340℃,并保温15~30min,最后自然冷却至常温即制得产品。
7.根据权利要求5所述的含假蓝宝石晶体的低密度石油压裂支撑剂的制备方法,其特征在于:所述步骤1中,复合矿化剂为方解石、白云石、铁矿石、钾长石和氧化铬按照重量比为0~20:10~20:20~40:0~15:5~25的比例混合而成。
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