CN100590091C - 一种水泥添加剂的应用方法 - Google Patents

一种水泥添加剂的应用方法 Download PDF

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CN100590091C
CN100590091C CN200810102987A CN200810102987A CN100590091C CN 100590091 C CN100590091 C CN 100590091C CN 200810102987 A CN200810102987 A CN 200810102987A CN 200810102987 A CN200810102987 A CN 200810102987A CN 100590091 C CN100590091 C CN 100590091C
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cement
weight
application method
parts
cement additive
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CN101255023A (zh
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张世甫
吴锦平
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Anton Oilfield Services Group Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039Premixtures of ingredients
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00241Physical properties of the materials not provided for elsewhere in C04B2111/00
    • C04B2111/00275Materials impermeable to vapours or gases
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

本发明公开了一种水泥添加剂的应用方法,其包括如下步骤:a将4~8%重量的丙烯酰胺、2~4%重量的交联剂、1~3.5%重量的引发剂、1~4%重量的增强剂和余量的水在常压下,于75~90℃进行交联聚合,形成凝胶,烘干、粉碎,制得水泥添加剂;b将制得的水泥添加剂加入到水泥浆中,100重量份水泥浆加入1.5~3重量份水泥添加剂,优选为加入2重量份的水泥添加剂。采用本发明的应用方法,将水泥添加剂应用到油田固井的水泥体系中,能够防止气窜,提高固井质量,固井质量合格率由原来的45%提高到94%以上。

Description

一种水泥添加剂的应用方法
技术领域
本发明涉及一种水泥添加剂的应用方法,特别是涉及一种水泥添加剂在油田固井中的应用方法。
背景技术
针对油藏埋深浅、油气比高,地下原油溶解有大量的天然气、原油粘度低、密度小,当打开油层后,随压力下降至饱和压力以下时,地层原油严重脱气,在常规水泥固井过程中,脱出的气体窜入水泥石基体,或进入水泥与套管或水泥与井壁之间的间隙中造成层间互窜甚至窜至井口,最终导致水泥石胶结强度低或层间窜流,严重影响了固井质量,即使采用挤水泥等补救措施也很难奏效,对油田后续作业如注水、酸化压裂和分层开采等造成不利影响,甚至无法进行。另外由于油层层间差异大,高压层与低压层同时存在,若为了防止气窜而加大水泥浆密度,会造成对低压层的污染,甚至压漏,若水泥浆密度过小,会加剧高压层气窜,影响固井质量,严重时地层油、气、水可窜至地面。
发明内容
本发明要解决的技术问题是提供一种水泥添加剂的应用方法,采用该方法可以防止气窜,提高固井质量。
为解决上述技术问题,本发明提供了一种水泥添加剂的应用方法,其包括如下步骤:a将4~8%重量的丙烯酰胺、2~4%重量的交联剂、1~3.5%重量的引发剂、1~4%重量的增强剂和余量的水在常压下,于75~90℃进行交联聚合,形成凝胶,烘干、粉碎,制得水泥添加剂;b将制得的水泥添加剂加入到水泥浆中,100重量份水泥浆加入1.5~3重量份水泥添加剂,优选为加入2重量份的水泥添加剂。
上述水泥添加剂的应用方法,其中,所述水泥浆的密度为1.75-1.95千克/升。
上述水泥添加剂的应用方法,其中,所述的丙烯酰胺的含量优选为4~5%;所述的交联剂的含量优选为2~3%;所述的引发剂的含量优选为1~2%;所述的增强剂的含量优选为1~2.5%。
上述水泥添加剂的应用方法,其中,所述的交联剂为有机硼或硼砂;所述的引发剂为强碱,优选为氢氧化钠或氢氧化钾;所述的增强剂为硅粉或粉煤灰。
上述水泥添加剂的应用方法,其中,所述制得的水泥添加剂的粒度为0.5~0.9mm。
采用本发明的应用方法,将水泥添加剂加入到常规的水泥体系后,由于该添加剂的比重较水泥小的多,加入该添加剂后,在不提高水泥浆密度的前提下,就可以达到防气窜的目的,并且在水泥凝固过程中,添加剂也随之膨胀,体膨型添加剂对水泥凝固产生动态逆反应,膨胀作功,从而有效地防止了环空气窜,也大大提高了水泥体的强度、水泥与套管、水泥与地层的胶结强度,防止气窜,提高了固井质量,固井质量合格率由原来的45%提高到94%以上。
具体实施方式
下面结合实施例详细描述本发明。
实施例1
将4%(重量)的丙烯酰胺,3%有机硼,1%氢氧化钠,2.5%硅粉和水在75℃下发生交联聚合,形成凝胶,之后烘干、粉碎、筛分,制得粒度为0.5~0.9mm的水泥添加剂。
将上述水泥添加剂加入到固井水泥浆中,100份(重量)水泥浆中加入1.5份水泥添加剂,其中,水泥浆的密度为1.75千克/升,采用本实施例的水泥添加剂后,防气效果好,确保了固井质量,固井质量合格率达94%。
实施例2
将5%(重量)的丙烯酰胺,2%硼砂,2%氢氧化钠,4%硅粉和水在80℃下发生交联聚合,形成凝胶,之后烘干、粉碎、筛分,制得粒度为0.5~0.9mm的水泥添加剂。
将上述水泥添加剂加入到固井水泥浆中,100份(重量)水泥浆中加入2份水泥添加剂,其中,水泥浆的密度为1.8千克/升,采用本实施例的水泥添加剂后,防气效果好,确保了固井质量,固井质量合格率达97%。
实施例3
将8%(重量)的丙烯酰胺,4%有机硼,3.5%氢氧化钾,1%粉煤灰和水在90℃下发生交联聚合,形成凝胶,之后烘干、粉碎、筛分,制得粒度为0.5~0.9mm的水泥添加剂。
将上述水泥添加剂加入到固井水泥浆中,100份(重量)水泥浆中加入3份水泥添加剂,其中,水泥浆的密度为1.95千克/升,采用本实施例的水泥添加剂后,防气效果好,确保了固井质量,固井质量合格率达95%。

Claims (6)

1、一种水泥添加剂的应用方法,其包括如下步骤:
a将4~8%重量的丙烯酰胺、2~4%重量的交联剂、1~3.5%重量的引发剂、1~4%重量的增强剂和余量的水在常压下,于75~90℃进行交联聚合,形成凝胶,烘干、粉碎,制得水泥添加剂;
b将制得的水泥添加剂加入到水泥浆中,100重量份水泥浆加入1.5~3重量份水泥添加剂;
其中,所述的交联剂为有机硼或硼砂,所述的引发剂为强碱,所述的增强剂为硅粉或粉煤灰。
2、如权利要求1所述的应用方法,其中,所述步骤b为在100重量份的水泥浆中加入2重量份水泥添加剂。
3、如权利要求1或2所述的应用方法,其中,所述水泥浆的密度为1.75-1.95千克/升。
4、如权利要求1或2所述的应用方法,其中,所述的丙烯酰胺的含量为4~5%;所述的交联剂的含量为2~3%;所述的引发剂的含量为1~2%;所述的增强剂的含量为1~2.5%。
5、如权利要求1所述的应用方法,其中,所述的引发剂为氢氧化钠或氢氧化钾。
6、如权利要求1或2所述的应用方法,其中,所述制得的水泥添加剂的粒度为0.5~0.9mm。
CN200810102987A 2008-03-28 2008-03-28 一种水泥添加剂的应用方法 Active CN100590091C (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86106211A (zh) * 1986-09-16 1988-04-20 石油部施工技术研究所 水下混凝土外加剂
EP0931776A1 (en) * 1998-01-22 1999-07-28 Nippon Shokubai Co., Ltd. Cement admixture and cement composition
CN1472418A (zh) * 2003-06-26 2004-02-04 辽宁天意实业股份有限公司 一种高温高压人工防砂井壁及其施工工艺
CN1834195A (zh) * 2006-04-24 2006-09-20 淄博永麒化工技术开发有限公司 油田固井用防气窜水泥浆

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86106211A (zh) * 1986-09-16 1988-04-20 石油部施工技术研究所 水下混凝土外加剂
CN1003238B (zh) * 1986-09-16 1989-02-08 石油部施工技术研究所 水下混凝土外加剂
EP0931776A1 (en) * 1998-01-22 1999-07-28 Nippon Shokubai Co., Ltd. Cement admixture and cement composition
CN1472418A (zh) * 2003-06-26 2004-02-04 辽宁天意实业股份有限公司 一种高温高压人工防砂井壁及其施工工艺
CN1834195A (zh) * 2006-04-24 2006-09-20 淄博永麒化工技术开发有限公司 油田固井用防气窜水泥浆

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Inventor after: Zhuo Jingjun

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