Low-residue starch fracturing fluid

The invention discloses a low-residue starch fracturing fluid which comprises, by weight, 2-4% of a thickening agent, 0.5-2% of a clay stabilizing agent, 0.1-0.5% of a temperature stabilizing agent, 0.1-1% of a discharge aiding agent, 0.1-0.3% of a bactericide, 0.1-0.3% of a pH regulator and the res...

Full description

Saved in:
Bibliographic Details
Main Authors HE XINWEI, TIAN SHENGMIN, WANG XIAOLEI, GAO XIUJUN, ZOU PENG
Format Patent
LanguageEnglish
Published 17.02.2016
Subjects
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
Online AccessGet full text

Cover

More Information
Summary:The invention discloses a low-residue starch fracturing fluid which comprises, by weight, 2-4% of a thickening agent, 0.5-2% of a clay stabilizing agent, 0.1-0.5% of a temperature stabilizing agent, 0.1-1% of a discharge aiding agent, 0.1-0.3% of a bactericide, 0.1-0.3% of a pH regulator and the rest of water, wherein the thickening agent is modified starch. Preparation of the modified starch comprises the following steps: firstly carrying out acetylation modification on waxy starch by using acetic anhydride, then carrying out phosphorylation modification by using sodium trimetaphosphate or phosphorus oxychloride, and finally spray-drying a modified product and carrying out pregelatinization treatment. The defect that content of water-insoluble substances existing in a conventional guanidine gel fracturing-fluid system and residue content after gel breaking are high and costs are high in the prior art is overcome. The modified starch thickening agent in the low-residue starch fracturing fluid has characteristics of low content of water-insoluble substances, low residue content after gel breaking and low cost.
Bibliography:Application Number: CN20141396892