CN110791280A - 一种覆膜支撑剂及其制备方法 - Google Patents
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Abstract
本发明公开了一种覆膜支撑剂,按质量比为0.03~0.05:0.01~0.02:0.015~0.03:0.03~0.04:1的树脂、固化剂、分散剂、水和骨料混合而成。解决了现有支撑剂强度低的问题,抗破碎能力强,且本发明的制备方法,制备的覆膜支撑剂圆度和球度高,覆膜均匀。
Description
技术领域
本发明属于石油压裂技术领域,具体涉及一种覆膜支撑剂,还涉及该覆膜支撑剂的制备方法。
背景技术
石油支撑剂又叫石油压裂支撑剂。在石油天然气深井开采时,高闭合压力低渗透性矿床经压裂处理后,使含油气岩层裂开,油气从裂缝形成的通道中汇集而出,此时需要流体注入岩石基层,以超过地层破裂强度的压力,使井筒周围岩层产生裂缝,形成一个具有高层流能力的通道,为保持压裂后形成的裂缝开启,油气产物能顺畅通过。用石油支撑剂随同高压溶液进入地层充填在岩层裂隙中,起到支撑裂隙不因应力释放而闭合的作用,从而保持高导流能力,使油气畅通,增加产量。
支撑剂一般为具有一定粒度和级配的天然砂或人造高强陶瓷颗粒。陶粒支撑剂(ceramic proppant)以铝矾土为原料,通过粉末制粒,烧结而成,具有耐高温、耐高压、耐腐蚀、高强度、高导流能力、低密度、低破碎率等特点,使用最为广泛。但在深井压裂过程中,井下压力增加,对支撑的要求则会相应增加,比如抗破碎能力,而现有支撑剂的破碎率相对较高,随着抗破碎能力的增加,则体积密度也相应增加。
发明内容
本发明的目的是提供一种覆膜支撑剂,解决了现有支撑剂强度低的问题。
本发明所采用的技术方案是,一种覆膜支撑剂,按质量比为0.03~0.05:0.04~0.02:0.015~0.03:0.03~0.04:1的树脂、固化剂、分散剂、水和骨料混合而成。
本发明的特点还在于,
树脂为环氧树脂、酚醛树脂中的一种。
固化剂为乌洛托品、乙二胺、间苯二胺、邻苯二甲酸胺中的一种。
骨料为陶粒,圆度≥0.8、球度≥0.8。
分散剂为硬脂酸钙、聚乙二醇、硅油中的一种。
本发明所采用的另一技术方案是,一种覆膜支撑剂的制备方法,具体步骤如下:
步骤1,按质量比0.03~0.05:0.04~0.02:0.015~0.03:003~0.04:1称取树脂、固化剂、分散剂、水和骨料;
步骤2,将步骤1称取的骨料放入烘箱中加热至250~300℃,倒入混砂机中;
步骤3,混砂机搅动步骤2的骨料,待温度降至200~230℃时,加入树脂继续搅拌,待搅拌均匀后且树脂融化包覆于骨料上后加入固化剂继续搅拌,使树脂与固化剂充分反应;
步骤4,待步骤3固化剂均匀的作用于树脂上后,加入水,进行冷却,待温度降至90~100℃时,加入分散剂,待搅拌均匀后停止,即得到半成品覆膜支撑剂;
步骤5,将步骤4得到的半成品覆膜支撑剂过筛,将粘连、结块的去除,即得到覆膜支撑剂。
本发明的有益效果是,本发明一种覆膜支撑剂,在陶粒为骨料的基础上进行覆膜,不仅能够增加支撑剂的抗破碎能力,还能使其体积密度较骨料的体积密度低,本发明的制备方法,制备的覆膜支撑剂圆度和球度高,覆膜均匀,易于操作。
具体实施方式
下面结合具体实施方式对本发明进行详细说明。
本发明提供了一种覆膜支撑剂,按质量比为0.03~0.05:0.01~0.02:0.015~0.03:0.03~0.04:1的树脂、固化剂、分散剂、水和骨料混合而成;
其中,树脂为环氧树脂、酚醛树脂中的一种;固化剂为乌洛托品、乙二胺、间苯二胺中的一种;骨料为陶粒,圆度≥0.8、球度≥0.8;分散剂为硬脂酸钙、聚乙二醇、硅油中的一种。
本发明提供了一种覆膜支撑剂的制备方法,具体步骤如下:
步骤1,按质量比0.03~0.05:0.04~0.02:0.015~0.03:0.03~0.04:1称取树脂、固化剂、分散剂、水和骨料;
步骤2,将步骤1称取的骨料放入烘箱中加热至250~300℃,倒入混砂机中;
步骤3,混砂机搅动步骤2的骨料,待温度降至200~230℃时,加入树脂继续搅拌,待搅拌均匀后且树脂融化包覆于骨料上后加入固化剂继续搅拌,使树脂与固化剂充分反应;
步骤4,待步骤3固化剂均匀的作用于树脂上后,加入水,进行冷却,待温度降至90~100℃时,加入分散剂,待搅拌均匀后停止,即得到半成品覆膜支撑剂;
步骤5,将步骤4得到的半成品覆膜支撑剂过筛,将粘连、结块的去除,即得到覆膜支撑剂。
实施例1
本发明一种覆膜支撑剂,按质量比为0.03:0.01:0.015:0.03:1的环氧树脂、乙二胺、硬脂酸钙、水和陶粒混合而成;
其中,陶粒的圆度≥0.8、球度≥0.8。
本发明一种覆膜支撑剂的制备方法,具体步骤如下:
步骤1,按质量比质量比为0.03:0.04:0.015:0.03:1称取环氧树脂、乙二胺、硬脂酸钙、水和陶粒;
步骤2,将步骤1称取的骨料放入烘箱中加热至250℃,倒入混砂机中;
步骤3,混砂机搅动步骤2的骨料,待温度降至230℃时,加入树脂继续搅拌,待搅拌均匀后且树脂融化包覆于骨料上后加入固化剂继续搅拌,使树脂与固化剂充分反应;
步骤4,待步骤3固化剂均匀的作用于树脂上后,加入水,进行冷却,待温度降至100℃时,加入分散剂,待搅拌均匀后停止,即得到半成品覆膜支撑剂;
步骤5,将步骤4得到的半成品覆膜支撑剂过筛,将粘连、结块的去除,即得到覆膜支撑剂。
实施例2
本发明一种覆膜支撑剂,按质量比为0.05:0.02:0.03:0.03~0.04:1的酚醛树脂、乌洛托品、聚乙二醇、水和陶粒混合而成;
其中,陶粒的圆度≥0.8、球度≥0.8。
本发明一种覆膜支撑剂的制备方法,具体步骤如下:
步骤1,按质量比为0.05:0.02:0.03:0.03~0.04:1的酚醛树脂、乌洛托品、聚乙二醇、水和陶粒;
步骤2,将步骤1称取的骨料放入烘箱中加热至300℃,倒入混砂机中;
步骤3,混砂机搅动步骤2的骨料,待温度降至200℃时,加入树脂继续搅拌,待搅拌均匀后且树脂融化包覆于骨料上后加入固化剂继续搅拌,使树脂与固化剂充分反应;
步骤4,待步骤3固化剂均匀的作用于树脂上后,加入水,进行冷却,待温度降至90℃时,加入分散剂,待搅拌均匀后停止,即得到半成品覆膜支撑剂;
步骤5,将步骤4得到的半成品覆膜支撑剂过筛,将粘连、结块的去除,即得到覆膜支撑剂。
实施例3
本发明一种覆膜支撑剂,按质量比为0.04:0.015:0.02:0.035:1的环氧树脂、间苯二胺、硅油、水和陶粒混合而成;
其中,陶粒的圆度≥0.8、球度≥0.8。
本发明提供了一种覆膜支撑剂的制备方法,具体步骤如下:
步骤1,按质量比为0.04:0.015:0.02:0.035:1的环氧树脂、间苯二胺、硅油、水和陶粒;
步骤2,将步骤1称取的骨料放入烘箱中加热至280℃,倒入混砂机中;
步骤3,混砂机搅动步骤2的骨料,待温度降至215℃时,加入树脂继续搅拌,待搅拌均匀后且树脂融化包覆于骨料上后加入固化剂继续搅拌,使树脂与固化剂充分反应;
步骤4,待步骤3固化剂均匀的作用于树脂上后,加入水,进行冷却,待温度降至95℃时,加入分散剂,待搅拌均匀后停止,即得到半成品覆膜支撑剂;
步骤5,将步骤4得到的半成品覆膜支撑剂过筛,将粘连、结块的去除,即得到覆膜支撑剂。
利用行标《SY至T5108-2014水力压裂和砾石充填作业用支撑剂性能测试方法》测试制备的支撑剂69MPa的破碎率,结果详见表1。
表1 69MPa的破碎率
序号 | 破碎率 |
实施例1 | 0.45 |
实施例2 | 0.51 |
实施例3 | 0.56 |
本发明一种覆膜支撑剂,在陶粒为骨料的基础上进行覆膜,不仅能够增加支撑剂的抗破碎能力,还能使其体积密度较骨料的体积密度低,本发明的制备方法,制备的覆膜支撑剂圆度和球度高,覆膜均匀,易于操作。
Claims (6)
1.一种覆膜支撑剂,其特征在于,按质量比为0.03~0.05:0.01~0.02:0.015~0.03:0.03~0.04:1的树脂、固化剂、分散剂、水和骨料混合而成。
2.根据权利要求1所述的一种覆膜支撑剂,其特征在于,所述树脂为环氧树脂、酚醛树脂中的一种。
3.根据权利要求1所述的一种覆膜支撑剂,其特征在于,所述固化剂为乌洛托品、乙二胺、间苯二胺中的一种。
4.根据权利要求1所述的一种覆膜支撑剂,其特征在于,所述骨料为陶粒,圆度≥0.8、球度≥0.8。
5.根据权利要求1所述的一种覆膜支撑剂,其特征在于,所述分散剂为硬脂酸钙、聚乙二醇、硅油中的一种。
6.根据权利要求1~5任一项所述的一种覆膜支撑剂的制备方法,其特征在于,具体步骤如下:
步骤1,按质量比0.03~0.05:0.04~0.02:0.015~0.03:0.03~0.04:1称取树脂、固化剂、分散剂、水和骨料;
步骤2,将步骤1称取的骨料放入烘箱中加热至250~300℃,倒入混砂机中;
步骤3,混砂机搅动步骤2的骨料,待温度降至200~230℃时,加入树脂继续搅拌,待搅拌均匀后且树脂融化包覆于骨料上后加入固化剂继续搅拌,使树脂与固化剂充分反应;
步骤4,待步骤3固化剂均匀的作用于树脂上后,加入水,进行冷却,待温度降至90~100℃时,加入分散剂,待搅拌均匀后停止,即得到半成品覆膜支撑剂;
步骤5,将步骤4得到的半成品覆膜支撑剂过筛,将粘连、结块的去除,即得到覆膜支撑剂。
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