CN111925169A - 一种适合兴隆台地层石油修井用封堵水窜的水泥浆体系 - Google Patents
一种适合兴隆台地层石油修井用封堵水窜的水泥浆体系 Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 23
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- 239000004642 Polyimide Substances 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 229920001721 polyimide Polymers 0.000 claims abstract description 11
- 239000011398 Portland cement Substances 0.000 claims abstract description 8
- 239000010425 asbestos Substances 0.000 claims abstract description 8
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 8
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 5
- 239000003129 oil well Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001653 ettringite Inorganic materials 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
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- 238000012360 testing method Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract description 4
- 239000004575 stone Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
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- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
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Abstract
本发明涉及油田修井技术领域,特别涉及一种适合兴隆台地层石油修井用封堵水窜的水泥浆体系。该水泥浆体系由干粉剂和水组成,干粉剂的各组成成分及其质量份数为:硅酸盐超细水泥干粉100份,G级硅酸盐水泥干粉20份,微硅粉15份,石棉纤维干粉0.6份,膨胀剂干粉0.5份,聚酰亚胺纤维干粉0.5份;上述干粉剂混拌均匀后与水调配成密度为1.82克/立方厘米的浆体形成本产品。本发明实现了具有微膨胀性和韧性好的特点,由于微膨胀性和韧性使凝固后的水泥石具有抗冲击性好、强度高的优点,通过合理的比例配比,使水泥浆具有良好的调配性能,利于现场施工,封堵效果好,钻塞后对封堵井段试压能够达到设计要求。
Description
技术领域:
本发明涉及油田修井技术领域,特别涉及一种适合兴隆台地层石油修井用封堵水窜的水泥浆体系。
背景技术:
水泥浆在修井中常用来封堵废弃层位﹑封堵窜层和加固套管外水泥环等。封堵地层:储气库老井再利用时,把废弃的射孔层位用水泥浆封堵,达到封堵流体窜通目的。水泥浆凝固后钻开封堵层位,试压,使其炮眼封死能够承受一定的压力,达到井筒再利用条件,以满足生产需要。
常规的油气井水泥浆体系因具有收缩性和韧性低的特点,用来封堵层位窜通往往达不到设计要求,钻开水泥塞后试压不合格。常规的油井水泥很难达到封堵效果。
发明内容:
本发明要解决的技术问题是提供一种适合兴隆台地层石油修井用封堵水窜的水泥浆体系,该水泥浆体系因适当地增加了膨胀材料和韧性材料,实现了具有微膨胀性和韧性好的特点,由于微膨胀性和韧性使凝固后的水泥石具有抗冲击性好、强度高的优点,通过合理的比例配比,使水泥浆具有良好的调配性能,利于现场施工,封堵效果好,钻塞后对封堵井段试压能够达到设计要求。克服了现有油气井水泥浆封堵效果差,钻开水泥塞后试压不合格的不足。
本发明所采取的技术方案是:一种适合兴隆台地层石油修井用封堵水窜的水泥浆体系,其特征在于:该水泥浆体系由干粉剂和水组成,干粉剂的各组成成分及其质量份数为:硅酸盐超细水泥干粉100份,G级硅酸盐水泥干粉20份,微硅粉15份,石棉纤维干粉0.6份,膨胀剂干粉0.5份,聚酰亚胺纤维干粉0.5份;上述干粉剂混拌均匀后与水调配成密度为1.82克/立方厘米的浆体形成本产品。
硅酸盐超细水泥干粉的粒径在5-30微米。
G级硅酸盐水泥干粉粒径不大于45微米。
微硅粉粒径在1微米以下。
石棉纤维干粉粒径小于15微米。
膨胀剂干粉采用钙铝矾石晶格膨胀剂。
聚酰亚胺纤维干粉模量大于8GPa,聚酰亚胺纤维干粉粒径小于45微米。
本发明的有益效果是:本发明实现了具有微膨胀性和韧性好的特点,由于微膨胀性和韧性使凝固后的水泥石具有抗冲击性好、强度高的优点,通过合理的比例配比,使水泥浆具有良好的调配性能,利于现场施工,封堵效果好,钻塞后对封堵井段试压能够达到设计要求。
具体实施方式:
一种适合兴隆台地层石油修井用封堵水窜的水泥浆体系,其特征在于:该水泥浆体系由干粉剂和水组成,干粉剂的各组成成分及其质量份数为:硅酸盐超细水泥干粉100份,G级硅酸盐水泥干粉20份,微硅粉15份,石棉纤维干粉0.6份,膨胀剂干粉0.5份,聚酰亚胺纤维干粉0.5份;上述干粉剂混拌均匀后与水调配成密度为1.82克/立方厘米的浆体形成本产品。
硅酸盐超细水泥干粉的粒径在5-30微米。
G级硅酸盐水泥干粉粒径不大于45微米。
微硅粉粒径在1微米以下。
石棉纤维干粉粒径小于15微米。
膨胀剂干粉采用钙铝矾石晶格膨胀剂。
聚酰亚胺纤维干粉模量大于8GPa,聚酰亚胺纤维干粉粒径小于45微米。
实施例1
将硅酸盐超细水泥干粉100份,G级硅酸盐水泥干粉20份,微硅粉15份,石棉纤维干粉0.6份,膨胀剂干粉0.5份,聚酰亚胺纤维干粉0.5份混拌均匀;上述混拌均匀的干粉剂与水调配成密度为1.82克/立方厘米的浆体形成本产品。
按封堵半径和封堵厚度,将本产品通过井筒注入地层中,待水泥凝固后钻掉水泥塞,井筒试压合格即完成封堵施工。
对于实施例1获得的本产品在进行强度试验数据(储气库要求试压压力15兆帕)在双32井挤灰封堵兴隆台油层。
施工目的:挤灰封堵上部的兴隆台油层,保留下部的热河台油层。对双31块储气库进行前期注氮气先导试验。
兴隆台油层数据,地层压力及压力系数24兆帕/1.0,平均有效孔隙度11.8%,地层破裂压力35兆帕。设计封堵半径2m,灰浆密度1.82克/立方厘米,最高挤注压力25兆帕。钻开后试压15兆帕合格,满足设计要求。
可以理解的是,以上关于本发明的具体描述,仅用于说明本发明而并非受限于本发明实施例所描述的技术方案,本领域的普通技术人员应当理解,仍然可以对本发明进行修改或等同替换,以达到相同的技术效果;只要满足使用需要,都在本发明的保护范围之内。
Claims (7)
1.一种适合兴隆台地层石油修井用封堵水窜的水泥浆体系,其特征在于:该水泥浆体系由干粉剂和水组成,干粉剂的各组成成分及其质量份数为:硅酸盐超细水泥干粉100份,G级硅酸盐水泥干粉20份,微硅粉15份,石棉纤维干粉0.6份,膨胀剂干粉0.5份,聚酰亚胺纤维干粉0.5份;上述干粉剂混拌均匀后与水调配成密度为1.82克/立方厘米的浆体形成本产品。
2.按照权利要求1所述的适合兴隆台地层石油修井用封堵水窜的水泥浆体系,其特征在于:所述硅酸盐超细水泥干粉的粒径在5-30微米。
3.按照权利要求1所述的适合兴隆台地层石油修井用封堵水窜的水泥浆体系,其特征在于:所述G级硅酸盐水泥干粉粒径不大于45微米。
4.按照权利要求1所述的适合兴隆台地层石油修井用封堵水窜的水泥浆体系,其特征在于:所述微硅粉粒径在1微米以下。
5.按照权利要求1所述的适合兴隆台地层石油修井用封堵水窜的水泥浆体系,其特征在于:所述石棉纤维干粉粒径小于15微米。
6.按照权利要求1所述的适合兴隆台地层石油修井用封堵水窜的水泥浆体系,其特征在于:所述膨胀剂干粉采用钙铝矾石晶格膨胀剂。
7.按照权利要求1所述的适合兴隆台地层石油修井用封堵水窜的水泥浆体系,其特征在于:所述聚酰亚胺纤维干粉模量大于8GPa,聚酰亚胺纤维干粉粒径小于45微米。
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