WO2016110038A1 - 一种胍胶压裂液体系 - Google Patents

一种胍胶压裂液体系 Download PDF

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WO2016110038A1
WO2016110038A1 PCT/CN2015/079340 CN2015079340W WO2016110038A1 WO 2016110038 A1 WO2016110038 A1 WO 2016110038A1 CN 2015079340 W CN2015079340 W CN 2015079340W WO 2016110038 A1 WO2016110038 A1 WO 2016110038A1
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fracturing fluid
fluid system
silicone
efficiency
agent
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PCT/CN2015/079340
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English (en)
French (fr)
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郝志伟
王宇宾
吕光明
宋有胜
徐鸿志
赵文娜
张明锋
叶松滨
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中国石油天然气集团公司
中国石油集团海洋工程有限公司
中国石油集团工程技术研究院
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Publication of WO2016110038A1 publication Critical patent/WO2016110038A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/66—Compositions based on water or polar solvents
    • C09K8/68—Compositions based on water or polar solvents containing organic compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/66—Compositions based on water or polar solvents
    • C09K8/68—Compositions based on water or polar solvents containing organic compounds
    • C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/84—Compositions based on water or polar solvents
    • C09K8/86—Compositions based on water or polar solvents containing organic compounds
    • C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
    • C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/26—Gel breakers other than bacteria or enzymes

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  • the present application relates to the field of petroleum exploitation technology, and in particular to a silicone fracturing fluid system.
  • China's oilfields have basically entered the middle and late stages of mining, the comprehensive water content has increased, the oil layer permeability has decreased, and the fracturing and seaming of the oil wells has been carried out to form artificial seepage channels, which is the most feasible to improve oil well permeability, improve oil recovery efficiency and increase production. means.
  • the traditional silicone fracturing fluid system used in water-based fracturing in China has strong temperature and shear resistance, which is good for sand-sanding.
  • the amount of silicone rubber used is large, and the rubber is not completely broken after fracturing, resulting in fracturing fluid. High residue content, easy to cause damage to the reservoir.
  • the invention provides a silicone fracturing fluid system, which solves the technical problem that the content of the fracturing fluid residue is high due to the incomplete gelation of the traditional silicone fracturing fluid system.
  • the present invention provides a silicone fracturing fluid system comprising a base liquid and a crosslinking agent; wherein the crosslinking agent and the base liquid are in a weight ratio of 0.3% to 0.8%;
  • the composition of the base liquid is: modified silicone thickener 0.2% to 0.45%, high-efficiency drainage agent 0.15% to 0.2%, high-efficiency clay stabilizer 0.2% to 0.5%, fungicide 0.05% to 0.1%, high-efficiency gel breaking The agent is 0.05% to 0.15%, and the rest is water.
  • the crosslinking agent and the base liquid are 0.6% by weight;
  • the base liquid composition is: modified silicone thickener 0.35%, high-efficiency drainage agent 0.2%, high-efficiency clay stabilizer 0.5%
  • the fungicide is 0.08%, the high-efficiency gel breaker is 0.1%, and the rest is water.
  • the high-efficiency drainage agent is composed of perfluorooctyl carboxylic acid polyoxyethylene ether, alkylphenol ethoxylate, and methanol.
  • the high-efficiency drainage agent is compounded by perfluorooctyl carboxylic acid polyoxyethylene ether, alkylphenol ethoxylate, and ethanol.
  • the high potency clay stabilizer is a compound of potassium chloride and choline chloride.
  • the bactericide is a mixture of a dodecyl dimethylamine surfactant, glutaraldehyde, and ethanol.
  • the breaker is a mixture of persulfate, sulfite and tetraethylenepentamine.
  • the present invention has the following beneficial effects or advantages:
  • the invention provides a silicone fracturing fluid system, comprising a base liquid and a crosslinking agent, the crosslinking agent and the The base liquid is 0.3% to 0.8% by weight; the base liquid composition is: modified silicone thickener 0.2% to 0.45%, high-efficiency drainage agent 0.15% to 0.2%, high-efficiency clay stabilizer 0.2% ⁇ 0.5%, bactericide 0.05%-0.1%, high-efficiency gel breaker 0.05%-0.15%, the rest is water, the sum of the weight percentages of each component is 100%, the ⁇ gel fracturing fluid system designed by the invention reduces ⁇ The amount of glue used, so the system residue content is small, reservoir damage is small, which is conducive to the protection of the reservoir.
  • Example 1 is a schematic view showing the indoor temperature resistance and shear resistance curve of the silicone fracturing fluid system in Example 1;
  • Example 2 is a schematic diagram showing the indoor temperature resistance and shear resistance curve of the silicone fracturing fluid system in Example 2;
  • Fig. 3 is a schematic diagram showing the indoor temperature resistance and shear resistance of the silicone fracturing fluid system in Example 3.
  • the present invention provides a silicone fracturing fluid system comprising a base fluid and a crosslinking agent. Wherein the crosslinking agent and the base liquid are in a weight ratio of 0.3% to 0.8%.
  • the base liquid composition is: modified silicone thickener 0.2% to 0.45%, high-efficiency drainage agent 0.15% to 0.2%, high-efficiency clay stabilizer 0.2% to 0.5%, fungicide 0.05% to 0.1%, high-efficiency breaking
  • the glue is 0.05% to 0.15%, the balance is water, and the sum of the weight percentages of the components is 100%.
  • the crosslinking agent and the base liquid are 0.6% by weight;
  • the base liquid composition is: 0.35% of the modified silicone thickener, 0.2% of the high-efficiency drainage agent, High-efficiency clay stabilizer 0.5%, fungicide 0.08%, high-efficiency breaker 0.1%, and the rest is water.
  • the crosslinking agent can be 3-aziridinyl propionate or an organotitanium crosslinking agent. Under the shear condition of 170s-1, the temperature resistance is ⁇ 200°C.
  • composition of the base liquid will be specifically described below.
  • the modified silicone thickener is a special surface treated carboxymethyl modified silicone, which has a pale yellow powder and is one of the grades specified in the general technical requirements for SY/T 5754-2007 vegetable gum for fracturing. Product.
  • the high-efficiency drainage agent is compounded with perfluorooctyl carboxylic acid polyoxyethylene ether, alkylphenol ethoxylate, methanol, or high-efficiency drainage agent is perfluorooctyl carboxylic acid polyoxyethylene ether, alkylphenol Polyoxyethylene ether and ethanol are compounded. 0.2% addition (mass ratio), 30 ° C, surface tension ⁇ 25.0 mN / m, interfacial tension ⁇ 2.0mN/m.
  • the high-performance clay stabilizer is a mixture of potassium chloride and choline chloride.
  • the clay anti-expansion rate is ⁇ 80% at room temperature.
  • the crosslinking agent is an organotitanium crosslinking agent. Under the shear condition of 170s-1, the temperature resistance is ⁇ 200°C.
  • the bactericide is a dodecyl dimethylamine surfactant, glutaraldehyde, and ethanol compound.
  • the persulfate may be ammonium persulfate, sodium persulfate, potassium persulfate or the like.
  • tetraethylene pentamine can promote the redox effect of persulfate, and effectively eliminate the flocculation of the residue after gel breaking, so that the residue of the fracturing fluid is completely dispersed in the residual liquid, thereby further achieving the purpose of reducing the residue.
  • the silicone fracturing fluid system will be described below with specific examples.
  • the tantalum fracturing fluid system was used for low-porosity, low-permeability, 120°C well sandstone reservoir fracturing construction.
  • the modified silicone thickener 0.2% and water 99.6% are formulated into a fracturing liquid base.
  • the modified silicone thickener is a special surface treated carboxymethyl modified silicone with a light yellow powder.
  • High-efficiency drainage agent 0.15% high-efficiency drainage agent is made up of perfluorooctyl carboxylic acid polyoxyethylene ether, alkylphenol ethoxylate, methanol or ethanol; 0.2% addition (mass ratio), 30 °C Under the condition, the surface tension is ⁇ 25.0 mN/m, and the interfacial tension is ⁇ 2.0 mN/m.
  • High effective clay stabilizer 0.2%, high-efficiency clay stabilizer is a mixture of potassium chloride and choline chloride.
  • the clay anti-expansion rate is ⁇ 80% at room temperature.
  • the fungicide is 0.05%, and the bactericide is a dodecyl dimethylamine surfactant, glutaraldehyde or ethanol compound.
  • the pump and the cross-linking agent are pumped into the fracturing manifold at a weight ratio of 100:0.3 for fracturing.
  • the indoor temperature and shear resistance curve is shown in Figure 1.
  • the tantalum fracturing fluid system was used for low-porosity, low-permeability, well-temperature 150 °C sandstone reservoir fracturing construction.
  • the modified silicone thickener 0.35% and water 99.52% are formulated into a fracturing liquid base solution, and the modified tantalum thickener is a carboxymethyl modified silicone which has been subjected to a special surface treatment, and has a pale yellow powder. It belongs to the standard "SY/T 5764-2007 General Technical Requirements for Fracturing Vegetable Glue".
  • High-efficiency drainage agent 0.2%, high-efficiency drainage agent is made up of perfluorooctyl carboxylic acid polyoxyethylene ether, alkylphenol ethoxylate, methanol or ethanol. 0.2% addition (mass ratio), 30 ° C, surface tension ⁇ 25.0 mN/m, interfacial tension ⁇ 2.0 mN/m.
  • High effective clay stabilizer 0.2%, high-efficiency clay stabilizer is a mixture of potassium chloride and choline chloride.
  • the clay anti-expansion rate is ⁇ 80% at room temperature.
  • the bactericide is 0.08%, and the bactericide is a dodecyl dimethylamine surfactant, a glutaraldehyde or an ethanol compound, and the mixture is uniformly stirred at a high speed, and the additives are all dispersed.
  • the pump and the cross-linking agent are pumped into the fracturing manifold at a weight ratio of 100:0.5 for fracturing.
  • the indoor temperature and shear resistance curve is shown in Figure 2.
  • the concentration of the tantalum fracturing fluid system was applied to the low-porosity, low-permeability, well-temperature 160 °C sandstone reservoir fracturing construction.
  • the modified silicone thickener is 0.45% and the water is 99.5%.
  • the modified silicone thickener is a carboxymethyl modified silicone after special surface treatment. The appearance is light yellow powder.
  • High-efficiency drainage agent 0.2%, high-efficiency drainage agent is made up of perfluorooctyl carboxylic acid polyoxyethylene ether, alkylphenol ethoxylate, methanol or ethanol. 0.2% addition amount (for mass ratio), surface tension ⁇ 25.0 mN/m at 30 ° C, and interfacial tension ⁇ 2.0 mN/m.
  • High effective clay stabilizer 0.2%, high-efficiency clay stabilizer is a mixture of potassium chloride and choline chloride.
  • the clay anti-expansion rate is ⁇ 80% at room temperature.
  • the bactericide is 0.10%, and the bactericide is a dodecyl dimethylamine surfactant, glutaraldehyde, and ethanol compound, and the mixture is uniformly stirred at a high speed, and all the additives are dispersed.
  • the pump and the cross-linking agent are pumped into the fracturing manifold at a weight ratio of 100:0.8 for fracturing construction.
  • the indoor temperature and shear resistance curve is shown in Figure 3.
  • This test tested the rheological properties of the silicone fracturing fluid system of the present invention at different temperatures. Referring to Table 1, it is the effect of the static gel breaking performance of the silicone fracturing fluid system.
  • the present invention has the following advantages or advantages:
  • the present invention provides a silicone fracturing fluid system comprising a base liquid and a crosslinking agent, the crosslinking agent and the base liquid being 0.3% to 0.8% by weight; the base liquid composition is: modified ⁇ Gold thickener 0.2% ⁇ 0.45%, high-efficiency drainage agent 0.15% ⁇ 0.2%, high-efficiency clay stabilizer 0.2% ⁇ 0.5%, bactericide 0.05% ⁇ 0.1%, high efficiency gel-breaking agent 0.05% ⁇ 0.15%, the rest For water, the sum of the weight percentages of the components is 100%.
  • the silicone fracturing fluid system designed by the invention reduces the amount of the rubber used, so the residue content of the system is small, the damage of the reservoir is small, and the reservoir is protected.

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Abstract

一种胍胶压裂液体系，包括基液和交联剂，所述交联剂和所述基液按重量比为0.3％～0.8％；所述基液组成为：改性胍胶稠化剂0.2％～0.45％、高效助排剂0.15％～0.2％、高效粘土稳定剂0.2％～0.5％、杀菌剂0.05％～0.1％、高效破胶剂0.05％～0.15％，其余为水，各组分重量百分比之和为100％，所述胍胶压裂液体系，降低了胍胶的使用量，因此体系残渣含量小，储层伤害小，利于保护储层。

Description

一种胍胶压裂液体系 技术领域
本申请涉及石油开采技术领域，尤其涉及一种胍胶压裂液体系。
背景技术
目前，我国油田基本都已进入开采中后期，综合含水率上升，油层渗透率下降，对油井采取压裂造缝，形成人工渗流通道，是改善油井渗透率，提高采油效率，增加产量的最可行手段。
目前国内水基压裂使用的传统胍胶压裂液体系，虽耐温耐剪切能力强，利于携砂造缝，但胍胶使用量大，压裂后破胶不彻底，导致压裂液残渣含量高，易造成储层伤害。
发明内容
本发明了提供了一种胍胶压裂液体系，以解决传统的胍胶压裂液体系破胶不彻底导致的压裂液残渣含量高的技术问题。
为解决上述技术问题，本发明提供了一种胍胶压裂液体系，包括基液和交联剂；其中，所述交联剂和所述基液按重量比为0.3％～0.8％；所述基液组成为：改性胍胶稠化剂0.2％～0.45％、高效助排剂0.15％～0.2％、高效粘土稳定剂0.2％～0.5％、杀菌剂0.05％～0.1％、高效破胶剂0.05％～0.15％，其余为水。
优选的，所述交联剂和所述基液按重量比为0.6％；所述基液组成为：改性胍胶稠化剂0.35％、高效助排剂0.2％、高效粘土稳定剂0.5％、杀菌剂0.08％、高效破胶剂0.1％，其余为水。
优选的，所述高效助排剂由全氟辛基羧酸聚氧乙烯醚、烷基酚聚氧乙烯醚、甲醇复合而成。
优选的，所述高效助排剂由全氟辛基羧酸聚氧乙烯醚、烷基酚聚氧乙烯醚、乙醇复合而成。
优选的，所述高效粘土稳定剂为氯化钾和氯化胆碱的混配物。
优选的，所述杀菌剂为十二烷基二甲基胺类表面活性剂、戊二醛、乙醇的混配物。
优选的，所述破胶剂为过硫酸盐、亚硫酸盐与四亚乙基五胺混配物。
通过本发明的一个或者多个技术方案，本发明具有以下有益效果或者优点：
本发明提供了一种胍胶压裂液体系，包括基液和交联剂，所述交联剂和所 述基液按重量比为0.3％～0.8％；所述基液组成为：改性胍胶稠化剂0.2％～0.45％、高效助排剂0.15％～0.2％、高效粘土稳定剂0.2％～0.5％、杀菌剂0.05％～0.1％、高效破胶剂0.05％～0.15％，其余为水，各组分重量百分比之和为100％，本发明设计的胍胶压裂液体系，降低了胍胶的使用量，因此体系残渣含量小，储层伤害小，利于保护储层。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1为示例1中胍胶压裂液体系室内耐温耐剪切能力曲线示意图；
图2为示例2中胍胶压裂液体系室内耐温耐剪切能力曲线示意图；
图3为示例3中胍胶压裂液体系室内耐温耐剪切能力曲线示意图。
具体实施方式
为了使本申请所属技术领域中的技术人员更清楚地理解本申请，下面结合附图，通过具体实施例对本申请技术方案作详细描述。
本发明提供了一种胍胶压裂液体系，包括基液和交联剂。其中，所述交联剂和所述基液按重量比为0.3％～0.8％。
所述基液组成为：改性胍胶稠化剂0.2％～0.45％、高效助排剂0.15％～0.2％、高效粘土稳定剂0.2％～0.5％、杀菌剂0.05％～0.1％、高效破胶剂0.05％～0.15％，其余为水，各组分重量百分比之和为100％。
在本发明最优实施例中，所述交联剂和所述基液按重量比为0.6％；所述基液组成为：改性胍胶稠化剂0.35％、高效助排剂0.2％、高效粘土稳定剂0.5％、杀菌剂0.08％、高效破胶剂0.1％，其余为水。
交联剂可以是3-吖丙啶基丙酸酯，或者有机钛交联剂。170s-1剪切条件下，耐温能力≥200℃。
下面具体介绍基液的组成成分。
改性胍胶稠化剂是经过特殊表面处理的羧甲基改性胍胶，外观为淡黄色粉末，属行标《SY/T 5754-2007压裂用植物胶通用技术要求》规定之一级品。
高效助排剂为全氟辛基羧酸聚氧乙烯醚、烷基酚聚氧乙烯醚、甲醇复配而成，或者高效助排剂为全氟辛基羧酸聚氧乙烯醚、烷基酚聚氧乙烯醚、乙醇复配而成。0.2％加量(质量比)、30℃条件下，表面张力≤25.0mN/m，界面张力 ≤2.0mN/m。
高效粘土稳定剂为氯化钾及氯化胆碱混配物。室温条件下粘土防膨率≥80％。
交联剂为有机钛交联剂。170s-1剪切条件下，耐温能力≥200℃。
杀菌剂为十二烷基二甲基胺类表面活性剂、戊二醛、乙醇混配物。
高效破胶剂为过硫酸盐(或过硫酸盐胶囊)、亚硫酸盐与四亚乙基五胺混配物。过硫酸盐可以是过硫酸铵、过硫酸钠、过硫酸钾等。
四亚乙基五胺的加入，可促进过硫酸盐的氧化还原作用，并有效消除破胶后残渣絮凝，使压裂液残渣完全分散于残液中，进一步实现降低残渣的目的。下面以具体的示例对胍胶压裂液体系进行说明。
示例1：
将胍胶压裂液体系用于低孔低渗、井温120℃砂岩储层压裂施工。
将改性胍胶稠化剂0.2％、水99.6％配制成压裂液基液，改性胍胶稠化剂是经过特殊表面处理的羧甲基改性胍胶，外观为淡黄色粉末，属行标《SY/T 5764-2007压裂用植物胶通用技术要求》规定之一级品。
待其充分溶胀后，顺序加入：
高效助排剂0.15％，高效助排剂为全氟辛基羧酸聚氧乙烯醚、烷基酚聚氧乙烯醚、甲醇或乙醇复配而成；0.2％加量(质量比)、30℃条件下，表面张力≤25.0mN/m，界面张力≤2.0mN/m。
高效粘土稳定剂0.2％，高效粘土稳定剂为氯化钾及氯化胆碱混配物。室温条件下粘土防膨率≥80％。
杀菌剂0.05％，杀菌剂为十二烷基二甲基胺类表面活性剂、戊二醛、乙醇混配物。
然后高速搅拌均匀，待添加剂全部分散。
现场施工时，采用泵车同时将基液、交联剂按重量比100∶0.3的比例泵入压裂管汇进行压裂施工。其室内耐温耐剪切能力曲线如图1。
示例2：
将胍胶压裂液体系用于低孔低渗、井温150℃砂岩储层压裂施工。
将改性胍胶稠化剂0.35％、水99.52％配制成压裂液基液，改性胍胶稠化剂是经过特殊表面处理后的羧甲基改性胍胶，外观为淡黄色粉末，属行标《SY/T 5764-2007压裂用植物胶通用技术要求》规定之一级品。
待其充分溶胀12min后，顺序加入：
高效助排剂0.2％，高效助排剂为全氟辛基羧酸聚氧乙烯醚、烷基酚聚氧乙烯醚、甲醇或乙醇复配而成。0.2％加量(质量比)、30℃条件下，表面张力≤ 25.0mN/m，界面张力≤2.0mN/m。
高效粘土稳定剂0.2％，高效粘土稳定剂为氯化钾及氯化胆碱混配物。室温条件下粘土防膨率≥80％。
杀菌剂0.08％，杀菌剂为十二烷基二甲基胺类表面活性剂、戊二醛、乙醇混配物，高速搅拌均匀，待添加剂全部分散。
现场施工时，采用泵车同时将基液、交联剂按重量比100∶0.5的比例泵入压裂管汇进行压裂施工。其室内耐温耐剪切能力曲线如图2。
示例3：
将浓度胍胶压裂液体系用于低孔低渗、井温160℃砂岩储层压裂施工。
将改性胍胶稠化剂0.45％，水99.5％配置压裂液基液，改性胍胶稠化剂是经过特殊表面处理后的羧甲基改性胍胶，外观为淡黄色粉末，属行标《SY/T 5764-2007压裂用植物胶通用技术要求》规定之一级品。
待其充分溶胀12min后，顺序加入：
高效助排剂0.2％，高效助排剂为全氟辛基羧酸聚氧乙烯醚、烷基酚聚氧乙烯醚、甲醇或乙醇复配而成。0.2％加量(为质量比)、30℃条件下，表面张力≤25.0mN/m，界面张力≤2.0mN/m。
高效粘土稳定剂0.2％，高效粘土稳定剂为氯化钾及氯化胆碱混配物。室温条件下粘土防膨率≥80％。
杀菌剂0.10％，杀菌剂为十二烷基二甲基胺类表面活性剂、戊二醛、乙醇混配物，高速搅拌均匀，待添加剂全部分散。
现场施工时，采用泵车同时将基液、交联剂按重量比100∶0.8的比例泵入压裂管汇进行压裂施工。其室内耐温耐剪切能力曲线如图3。
本发明涉及的胍胶压裂液体系的性能优点及有益效果，可从如下测试结果表明。
本次试验测试了本发明涉及的胍胶压裂液体系在不同温度下的流变性能，参看表1，是胍胶压裂液体系静态破胶性能的效果。
Figure PCTCN2015079340-appb-000001
Figure PCTCN2015079340-appb-000002
表1
本次试验测试了一种耐高温低浓度胍胶压裂液体系残渣含量，参看表2，是本发明涉及的胍胶压裂液体系残渣含量。
Figure PCTCN2015079340-appb-000003
表2
本次试验测试了一种耐高温低浓度胍胶压裂液体系静态滤失系数，参看表3，是本发明涉及的胍胶压裂液体系静态滤失系数。
Figure PCTCN2015079340-appb-000004
表3
本次试验测试了一种耐高温低浓度胍胶压裂液体系岩心伤害性能，参看表4，是本发明涉及的胍胶压裂液静态滤失系数。
Figure PCTCN2015079340-appb-000005
表4
通过本发明的一个或者多个实施例，本发明具有以下有益效果或者优点：
本发明提供了一种胍胶压裂液体系，包括基液和交联剂，所述交联剂和所述基液按重量比为0.3％～0.8％；所述基液组成为：改性胍胶稠化剂0.2％～0.45％、高效助排剂0.15％～0.2％、高效粘土稳定剂0.2％～0.5％、杀菌剂0.05％～0.1％、高效破胶剂0.05％～0.15％，其余为水，各组分重量百分比之和为100％，本发明设计的胍胶压裂液体系，降低了胍胶的使用量，因此体系残渣含量小，储层伤害小，利于保护储层。
尽管已描述了本申请的优选实施例，但本领域内的普通技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本申请范围的所有变更和修改。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (7)

  1. 一种胍胶压裂液体系，包括基液和交联剂；其中，所述交联剂和所述基液按重量比为0.3％～0.8％；
    所述基液组成为：改性胍胶稠化剂0.2％～0.45％、高效助排剂0.15％～0.2％、高效粘土稳定剂0.2％～0.5％、杀菌剂0.05％～0.1％、高效破胶剂0.05％～0.15％，其余为水。
  2. 如权利要求1所述的胍胶压裂液体系，其特征在于，所述交联剂和所述基液按重量比为0.6％；
    所述基液组成为：改性胍胶稠化剂0.35％、高效助排剂0.2％、高效粘土稳定剂0.5％、杀菌剂0.08％、高效破胶剂0.1％，其余为水。
  3. 如权利要求1所述的胍胶压裂液体系，其特征在于，所述高效助排剂由全氟辛基羧酸聚氧乙烯醚、烷基酚聚氧乙烯醚、甲醇复合而成。
  4. 如权利要求1所述的胍胶压裂液体系，其特征在于，所述高效助排剂由全氟辛基羧酸聚氧乙烯醚、烷基酚聚氧乙烯醚、乙醇复合而成。
  5. 如权利要求1所述的胍胶压裂液体系，其特征在于，所述高效粘土稳定剂为氯化钾和氯化胆碱的混配物。
  6. 如权利要求1所述的胍胶压裂液体系，其特征在于，所述杀菌剂为十二烷基二甲基胺类表面活性剂、戊二醛、乙醇的混配物。
  7. 如权利要求1所述的胍胶压裂液体系，其特征在于，所述高效破胶剂为过硫酸盐、亚硫酸盐与四亚乙基五胺混配物。
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