Emulsion with both resistance reduction and thickening properties in fracturing as well as rapid dissolution and preparation method thereof

An emulsion and performance technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as rapid dissolution, thickening, and drag reduction

Active Publication Date: 2018-09-04
聚盛绿能河北科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improve the fracturing effect through the use of an emulsion, and solve the problems of drag reduction, thickening, rapid dissolution, temperature resistance and salt resistance in the fracturing process

Method used

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  • Emulsion with both resistance reduction and thickening properties in fracturing as well as rapid dissolution and preparation method thereof
  • Emulsion with both resistance reduction and thickening properties in fracturing as well as rapid dissolution and preparation method thereof
  • Emulsion with both resistance reduction and thickening properties in fracturing as well as rapid dissolution and preparation method thereof

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0020] Specific implementation methods include:

[0021] (1) Preparation of the organic phase: add a certain amount of organic solvent in a polymerization kettle equipped with a stirring device, then continue to add a certain amount of emulsifying surfactant or a mixture of surfactants in the polymerization kettle, stir and mix evenly;

[0022] (2) For the preparation of the water phase, a certain amount of water is added to another liquid mixing kettle equipped with a stirring device, and then a certain amount of nano-polymer microspheres and monomers with chain extending groups are added in order, and the alkali is added. Adjust the pH value of the system, lower the temperature, and add the initiator;

[0023] (3) Mixing emulsification, introducing the prepared water phase into the polymerization tank containing the organic phase, stirring and mixing, and further emulsifying through the emulsification pump at the bottom of the tank to obtain a more stable emulsion;

[0024]...

Embodiment 1

[0028]Add 1000kg No. 7 white oil to a 3-party polymerization kettle equipped with a stirring device, then continue to add 150kg Span80 and 10kg Tween60 to the polymerization kettle, stir and mix evenly; add 1000kg to another 3-party liquid preparation kettle equipped with a stirring device Deionized water, then sequentially add 90kg of nano-polymer microspheres with chain-extending groups, 800kg of acrylamide, 80kg of acrylic acid, 20kg of AMPS, add sodium hydroxide to adjust the pH value of the system to 7.5±0.5, cool down to 15°C, Add 50 g of initiator ammonium persulfate; introduce the prepared water phase into the polymerization tank containing the organic phase through the tank bottom pump to stir and mix, and further emulsify through the emulsification pump at the bottom of the tank to obtain a more stable emulsion; Nitrogen gas was passed into the kettle, and the temperature was lowered to 20°C at the same time to carry out the polymerization reaction, and the temperatur...

Embodiment 2

[0030] Add 1000kg of kerosene to a 3-party polymerization kettle equipped with a stirring device, then continue to add 400kg Span60 and 50kgOP-7 into the polymerization kettle, and stir and mix evenly; Water, and then add 10kg of nano-polymer microspheres with chain-extending groups, 400kg of acrylamide, 200kg of acrylic acid, 100kg of AMPS in sequence, add sodium hydroxide to adjust the pH value of the system to 6.5±0.5, cool down to 15°C, add trigger Add sodium persulfate 100g; introduce the prepared water phase into the polymerization tank containing the organic phase through the bottom pump to stir and mix, and further emulsify through the emulsification pump at the bottom of the tank to obtain a more stable emulsion; Nitrogen was introduced, and the temperature was lowered to 20°C at the same time to carry out the polymerization reaction, and the temperature was controlled so that the final temperature of the system was lower than 100°C. The final polymerization time is a...

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Abstract

The invention relates to an emulsion with both resistance reduction and thickening properties in fracturing as well as rapid dissolution and a preparation method thereof. The emulsion is obtained by the polymerization of a water-in-oil type emulsion, namely a reverse-phase emulsion, including the polymerization process of the reverse-phase emulsion and the treatment process of phase inversion performed on the emulsion after polymerization. The reverse-phase emulsion consists of an organic solvent, an emulsifying surfactant, a monomer, a nano micro-sphere containing a chain extension group, water, an initiating agent and a phase inversion surfactant. In the synthesis of the emulsion, the nano micro-sphere containing the chain extension group is introduced. A cationic surfactant is added ina reverse phase of the emulsion and absorbed on a macromolecular chain. The preparation method comprises the following five steps: organic phase preparation, water phase preparation, mixed emulsification, polymerization, and phase inversion. The emulsion with both resistance reduction and thickening properties in fracturing as well as rapid dissolution, prepared by the method, can effectively improve a fracturing effect in petroleum and natural gas exploitation.

Description

technical field [0001] The invention relates to an emulsion which has drag reduction and thickening properties in fracturing and dissolves rapidly and a preparation method thereof, and is suitable for the field of oil and gas exploitation. Background technique [0002] Fracturing is a technology that leaves support materials in fractures through fracturing to keep fractures open and provide high diversion channels for oil and gas to flow to production wells. Successful fracturing requires that the volume of the fracture be as large and complex as possible, which largely depends on the type of fracturing fluid used. [0003] Currently, there are two types of fracturing fluids widely used, one is cross-linked polymer gel (including natural polymers and synthetic polymers) type fracturing fluid, and the other is slick water type clean fracturing fluid. Compared with the two, the cross-linked polymer gel type fracturing fluid appeared earlier, has a large sand-carrying capacity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F2/28C09K8/60C09K8/68C09K8/88
CPCC08F2/28C08F220/56C09K8/602C09K8/68C09K8/882C09K2208/28C08F220/06C08F220/585
Inventor 薛伟赵子川王世召刘贵洲
Owner 聚盛绿能河北科技有限公司
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