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Integrated composite acid and preparation method thereof

A compound acid and compound synergistic technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems that the fracturing process cannot be implemented or can not be carried out at the same time, and achieve the effect of avoiding compatibility problems

Active Publication Date: 2021-06-11
CHENGDU LEARN PRACTICES TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an integrated composite acid and its preparation method to solve the problem that the traditional fracturing fluid construction and acid liquid cannot be carried out at the same time due to the incompatibility of the system in the prior art, resulting in the problem that some fracturing processes cannot be implemented

Method used

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  • Integrated composite acid and preparation method thereof
  • Integrated composite acid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Integrated composite acid, including polymer fracturing fluid, acid slick water and gelling acid, wherein the polymer fracturing fluid includes 0.15 parts of emulsion gelling agent, 0.2 parts of crosslinking agent and 0.2 parts of compounding acid in parts by mass Synergist, balance is water; Acid slippery water includes 0.1 part of emulsion gelling agent, 1 part of corrosion inhibitor, 1 part of iron ion stabilizer, 1 part of composite synergist and 5 parts of hydrochloric acid in parts by mass, The balance is water; the gel acid is calculated in parts by mass, including 1 part of emulsion gelling agent, 1 part of corrosion inhibitor, 1 part of iron ion stabilizer, 1 part of composite synergist and 10 parts of hydrochloric acid, and the balance is water .

[0034] Among the above components, the crosslinking agent is organic zirconium; the composite synergist is fluorocarbon surfactant; the corrosion inhibitor is imidazole; and the iron ion stabilizer is citric acid. ...

Embodiment 2

[0045] Integrated composite acid, including polymer fracturing fluid, acid slick water and gelling acid, wherein the polymer fracturing fluid includes 0.6 parts of emulsion gelling agent, 0.3 parts of crosslinking agent and 0.2 parts of compounding acid in parts by mass Synergist, the balance is water; Acid slippery water includes 0.15 parts of emulsion gelling agent, 1 part of corrosion inhibitor, 1 part of iron ion stabilizer, 1 part of composite synergist and 10 parts of hydrochloric acid in parts by mass, The balance is water; the gel acid is calculated in parts by mass, including 2 parts of emulsion gelling agent, 3 parts of corrosion inhibitor, 1.5 parts of iron ion stabilizer, 2 parts of composite synergist and 20 parts of hydrochloric acid, and the balance is water .

[0046]The emulsion gelling agent comprises by weight fraction: 40 parts of cationic polyacrylamide, 2 parts of viscosity regulator, 1 part of fumed silica, 56 parts of methyl nylonate and 1 part of dioct...

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Abstract

The invention relates to the technical field of acid fracturing, and particularly discloses an integrated composite acid and a preparation method thereof, wherein the integrated composite acid comprises a polymer fracturing fluid, acidic slick water and gelled acid; the polymer fracturing fluid, the acidic slick water and the gelled acid are prepared from a same emulsion gelling agent, and the emulsion gelling agent comprises 30-50 parts of cationic polyacrylamide, 2-4 parts of a viscosity modifier, 0.5-1.2 parts of a suspending agent, 40-70 parts of a solvent and 0.5-1.5 parts of a wetting dispersant. The polymer fracturing fluid and the acid fluid are prepared by adopting the same emulsion gelling agent, so that the polymer fracturing fluid and the acid fluid can be well compatible, and an integrated online preparation mode is adopted, so that the viscosity, the concentration and the type of the acid fluid can be adjusted in real time, and meanwhile, the polymer fracturing fluid and the acid fluid can be prepared according to the construction period of fracturing construction; and the problem that the acid liquid prepared in advance is not used in time and goes bad is solved, and the composite acid system has the advantages of good gel breaking effect, easy flowback and the like, and has low damage to strata.

Description

technical field [0001] The invention relates to the technical field of acid fracturing, in particular to an integrated composite acid and a preparation method thereof. Background technique [0002] Acid fracturing is one of the main measures to increase oil and gas production. The proportion of artificial polymers mainly polyacrylamide is getting higher and higher. At present, the commonly used polymer fracturing fluid uses anionic polyacrylamide, while acid fluid (acid slippery Water and gelling acid) use cationic polyacrylamide, because the two will produce flocs and sediments after mixing, which will block the pipeline and formation, which is extremely harmful, so the two cannot be mixed during use; therefore, the traditional pressure Fracture fluid construction and acid fluid cannot be carried out at the same time due to the incompatibility of the system, resulting in the inability to implement some fracturing processes. [0003] In addition, the traditional gelled acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/72C09K8/74C09K8/78
CPCC09K8/725C09K8/74C09K8/78
Inventor 郭建春任山张绍彬刘斌寇将苟波李刚唐朝钧雷欣鲁智勇卢聪赵志红路千里郑建华庹红梅曾韦蒋尧张灵刁素周明源李阳洋
Owner CHENGDU LEARN PRACTICES TECH CO LTD
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