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Fracturing fluid system and application thereof in continuous mixing fracturing technique

A fracturing fluid and system technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of high preparation cost and difficult process, reduce manual labor, solve high preparation cost, and improve liquid preparation efficiency effect

Inactive Publication Date: 2018-03-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a fracturing fluid system and its application in continuous mixing fracturing technology, so as to solve the problems of high preparation cost and difficult process in the prior art of continuous mixing fracturing fluid technology

Method used

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  • Fracturing fluid system and application thereof in continuous mixing fracturing technique
  • Fracturing fluid system and application thereof in continuous mixing fracturing technique
  • Fracturing fluid system and application thereof in continuous mixing fracturing technique

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The fracturing fluid system provided in this embodiment includes the following preparation processes:

[0036] Add oxalic acid, a viscosity enhancer, to ice water at 3°C, stir and mix evenly, add hydroxypropyl guar gum (Kunshan first grade), stir quickly for 1 min and mix well, swell at rest to obtain the original solution;

[0037] Add organic shed crosslinking agent YGB (provided by the pilot plant of Engineering Technology Research Institute of Xinjiang Oilfield Company) and pH adjuster NaOH into the water, and mix well to obtain a crosslinking liquid;

[0038] Mix the above-mentioned stock solution and the above-mentioned cross-linking liquid at a volume ratio of 100:1, add the breaker sodium persulfate and stir evenly, the cross-linking time is 1.0min, to obtain the fracturing fluid system, the fracturing fluid system The mass percentage is 0.12%.

Embodiment 2

[0040] The fracturing fluid system provided in this embodiment includes the following preparation processes:

[0041] Add oxalic acid, a viscosity enhancer, to ice water at 3°C, stir and mix evenly, add hydroxyprom guar gum (Kunshan first grade), stir quickly for 1 min and mix well, swell at rest to obtain the original solution;

[0042] Add organic shed crosslinking agent YGB (provided by Xinjiang Oilfield Company Engineering Technology Research Institute pilot plant), organic zirconium high temperature crosslinking agent HT (provided by Xinjiang Oilfield Company Engineering Technology Institute pilot plant) and pH regulator NaOH into the water , Mix well to obtain cross-linking liquid;

[0043] Mix the above-mentioned stock solution and the above-mentioned cross-linking liquid in a volume ratio of 100:1, add the gel breaker capsule breaker and stir evenly, the cross-linking time is 1.5min, to obtain the fracturing fluid system, the gel breaker in the fracturing fluid system The ma...

Embodiment 3

[0045] The fracturing fluid system provided in this embodiment includes the following preparation processes:

[0046] Add oxalic acid, a viscosity enhancer, to ice water at 3°C, stir and mix evenly, add hydroxypropyl guar gum (Kunshan first grade), stir quickly for 1 min and mix well, swell at rest to obtain the original solution;

[0047] Add organic shed crosslinking agent YGB (provided by the pilot plant of Engineering Technology Research Institute of Xinjiang Oilfield Company) and pH adjuster NaOH into the water, and mix well to obtain a crosslinking liquid;

[0048] Mix the above-mentioned stock solution and the above-mentioned cross-linking liquid in a volume ratio of 100:1, add the breaker sodium persulfate and stir evenly, and the cross-linking time is 1.0min to obtain the fracturing fluid system. The mass percentage is 0.1%.

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Abstract

The invention provides a fracturing fluid system and application thereof in a continuous mixing fracturing technique. The fracturing fluid system comprises a raw fluid, a crosslinking fluid and a gelbreaker, the volume ratio of the raw fluid to the crosslinking fluid is (35-200):1, the raw fluid comprises, by weight, 0.2-0.6% of hydroxypropyl guar gum, 0.005-0.03% of a viscosity promoter and 99.37-99.795% of water. Rapid hydration swelling of molecules of the hydroxypropyl guar gum is promoted through synergy between the hydroxypropyl guar gum and little of the viscosity promoter, the raw fluid of the fracturing fluid system can become viscous rapidly under normal temperature and low temperature, and the fracturing fluid system can be imparted the advantages of low price and good fracturing fluid performance; additionally, fluid dispensing efficiency is effectively improved, labor is reduced, the problems of high preparation cost and resource waste caused by the conventional fluid dispensing are solved, and the operation requirements of a large-scale hydrofracturing site are met.

Description

Technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a fracturing fluid system and its application in continuous mixed fracturing technology. Background technique [0002] With the continuous deepening of oil and gas exploitation and the increasing difficulty of exploitation, hydraulic fracturing technology has become the most important production increase measure to increase the productivity and recovery rate of oil and gas wells. Large-scale hydraulic fracturing modes for unconventional reservoirs are gradually becoming the development direction of reservoir measures, and fluid allocation has become an important part of hydraulic fracturing. [0003] The traditional fracturing construction liquid distribution method is mainly prepared by the liquid distribution station and transported to the fracturing construction site by tank trucks. The mixing process is that the guar gum and other additives are mechanically stirred a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/685C09K8/887C09K2208/26
Inventor 董景锋怡宝安潘竟军邬国栋汪志臣李晓艳翟怀建麦尔耶姆古丽·安外尔张凤娟郭南舟
Owner PETROCHINA CO LTD
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