CN109293346A - 一种低密度石油压裂支撑剂及其制备方法 - Google Patents
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Abstract
本发明公开了一种低密度石油压裂支撑剂及其制备方法，包括以下质量百分比的成分：铝矾土65～75％、陶瓷研磨废料15～20％、硅石5～8％、黏土2～6％。本低密度石油压裂支撑剂采用价格低廉的陶瓷研磨废料和硅石作为辅助材料，可降低陶粒砂的生产成本；同时，本低密度石油压裂支撑剂砂密度较低、单位面积的陶粒砂质量小，用于油田开采过程中，水力压裂时同一裂缝所需陶粒砂的质量减少，从而实现降低油田开采石油的成本。
Description
技术领域
本发明涉及一种石油压裂支撑剂及其制备方法，具体是一种低密度石油压裂支撑剂及其制备方法，属于石油压裂支撑剂技术领域。
背景技术
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，此时为保持压裂后形成的裂缝开启、油气产物能顺畅通过，需要将高压溶液注入岩石基层以超过地层破裂强度的压力，进而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，用石油压裂支撑剂(又叫石油支撑剂)随同高压溶液进入地层充填在岩层裂隙中可起到支撑裂隙的作用，从而保持通道的高导流能力、使油气畅通增加产量。
目前常用的石油压裂支撑剂主要有石英砂、铝钒土陶粒砂及树脂包覆的复合颗粒等，其中采用铝钒土陶粒工艺的陶粒砂因其具有耐腐蚀、耐高温、耐高压的优点，因此被越来越广泛地应用于油气田开采。现有陶粒砂通常通过铝矾土及降温剂锰矿砂和白云石制成，这几种物质混合烧结后，陶粒砂的表面经放大后带有毛刺且表面凸凹不平，进而造成堆积后砂子中间的缝隙形成的通道不均匀，相对倒流能力较低，使用此类砂子的油井产量不高；另外，铝钒土陶粒砂密度较高，单位面积水力裂缝所需的陶粒砂数量较大，因此会增加油田开采时的压裂成本。
发明内容
针对上述问题，本发明提供一种低密度石油压裂支撑剂及其制备方法，具有相对较低的体积密度、相对较低的视密度、相对较高的抗破碎能力和较好的表面光洁度，进而能够实现降低油田开采成本。
为实现上述目的，本低密度石油压裂支撑剂包括以下质量百分比的成分：
作为本发明的一种实施方式，本低密度石油压裂支撑剂包括以下质量百分比的成分：
作为本发明的另一种实施方式，本低密度石油压裂支撑剂包括以下质量百分比的成分：
作为本发明的另一种实施方式，本低密度石油压裂支撑剂包括以下质量百分比的成分：
与现有技术相比，本低密度石油压裂支撑剂采用价格低廉的陶瓷研磨废料和硅石作为辅助材料，可降低陶粒砂的生产成本；同时，本低密度石油压裂支撑剂砂密度较低、单位面积的陶粒砂质量小，用于油田开采过程中，水力压裂时同一裂缝所需陶粒砂的质量减少，从而实现降低油田开采石油的成本。
具体实施方式
实施例1：
本低密度石油压裂支撑剂包括以下质量百分比的成分：
实施例2：
本低密度石油压裂支撑剂包括以下质量百分比的成分：
实施例3：
本低密度石油压裂支撑剂包括以下质量百分比的成分：
本低密度石油压裂支撑剂制备流程如下：
a、首先将铝矾土、陶瓷研磨废料、硅石、黏土原料分别进行破碎，破碎至粒径≤10mm；
b、通过配料系统将步骤a破碎后的四种原料按照配比比例进行配料，并将配好的物料送入球磨机中磨粉，用选粉机选出400目的细粉，选粉机选剩的粗粉返回球磨机中循环研磨；
c、将步骤b选出的400目细粉送至制粒机中，开启制粒机旋转120分钟，制成含水量为6％的陶粒生粒；
d、将步骤c制成的陶粒生粒送至筛分机，筛选出30/50目规格的陶粒半成品；将筛选剩余的陶粒生粒用破磨机研磨后送入制粒机中重新制粒；
e、将步骤d筛选出的陶粒半成品送至回转窑中，在回转窑尾段经200～300℃烘干30分钟，在回转窑中后部经400～900℃预热1小时，最后在回转窑前部高温区经1250～1300℃煅烧1小时，煅烧后得到陶粒成品；
f、将步骤e煅烧后的陶粒成品送入冷却窑中冷却至室温；
g、将步骤f冷却后的陶粒成品送入筛分机中再次筛选出30/50目规格得到陶粒砂成品。
Claims (5)
1.一种低密度石油压裂支撑剂，其特征在于，包括以下质量百分比的成分：
2.根据权利要求1所述的低密度石油压裂支撑剂，其特征在于，包括以下质量百分比的成分：
3.根据权利要求1所述的低密度石油压裂支撑剂，其特征在于，包括以下质量百分比的成分：
4.根据权利要求1所述的低密度石油压裂支撑剂，其特征在于，包括以下质量百分比的成分：
5.一种低密度石油压裂支撑剂的制备方法，其特征在于，包括以下步骤：
a、首先将铝矾土、陶瓷研磨废料、硅石、黏土原料分别进行破碎，破碎至粒径≤10mm；
b、通过配料系统将步骤a破碎后的四种原料按照配比比例进行配料，并将配好的物料送入球磨机中磨粉，用选粉机选出细粉，选粉机选剩的粗粉返回球磨机中循环研磨；
c、将步骤b选出的细粉送至制粒机中，开启制粒机制成含水量为6％的陶粒生粒；
d、将步骤c制成的陶粒生粒送至筛分机，筛选出陶粒半成品；将筛选剩余的陶粒生粒用破磨机研磨后送入制粒机中重新制粒；
e、将步骤d筛选出的陶粒半成品送至回转窑中，在回转窑尾段烘干30分钟，在回转窑中后部经预热1小时，最后在回转窑前部高温区煅烧1小时，煅烧后得到陶粒成品；
f、将步骤e煅烧后的陶粒成品送入冷却窑中冷却至室温。
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| CN111620673A (zh) * | 2020-04-16 | 2020-09-04 | 郑州市润宝耐火材料有限公司 | 一种高强度低密度陶粒支撑剂及其制备方法 |
| CN115338118A (zh) * | 2022-05-17 | 2022-11-15 | 河南郑耐新材料有限公司 | 一种陶粒支撑剂半成品筛选工艺 |
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| CN102786921A (zh) * | 2012-08-03 | 2012-11-21 | 贵州林海陶粒制造有限公司 | 低密度石油压裂支撑剂及其制备方法 |
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| CN102786921A (zh) * | 2012-08-03 | 2012-11-21 | 贵州林海陶粒制造有限公司 | 低密度石油压裂支撑剂及其制备方法 |
Non-Patent Citations (1)
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| 周晓燕: "《陶瓷坯釉料制备技术》", 31 August 2017, 江西高校出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111620673A (zh) * | 2020-04-16 | 2020-09-04 | 郑州市润宝耐火材料有限公司 | 一种高强度低密度陶粒支撑剂及其制备方法 |
| CN115338118A (zh) * | 2022-05-17 | 2022-11-15 | 河南郑耐新材料有限公司 | 一种陶粒支撑剂半成品筛选工艺 |
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