STUDY ON THE HYDROLYSIS OF POLYACRYLAMIDE AT HIGH TEMPERATURE AND ITS SELECTION

doi:10.3863/j.issn.1000-2634.2000.01.018

西南石油大学学报(自然科学版) ›› 2000, Vol. 22 ›› Issue (1): 66-69.DOI: 10.3863/j.issn.1000-2634.2000.01.018

• 油气化学工程 • Previous Articles Next Articles

STUDY ON THE HYDROLYSIS OF POLYACRYLAMIDE AT HIGH TEMPERATURE AND ITS SELECTION

KONG Bailing

The Research Institute of Exploration and Exploitation, Henan Oilfield

Received:1999-04-16 Revised:1900-01-01 Online:2000-02-20 Published:2000-02-20
Contact: KONG Bailing

Abstract

Abstract: The hydrolysis of partially hydrolyzed polyacrylamide (HPAM) at elevated temperatureis regarded as the primary mechanism of its chemical degradation and the essential factor when selecting it. The starch-cadmium iodide method is used to determine the hydrolysis degree of HPAM in fresh water and
oilfield produced water during aging time at 75℃.The equations between hydrolysis degree of HPAM and aging time are established, which can be used to predict the values of hydrolysis degree at any aging time. In fresh water (PH=8.0),the hydrolysis rate is a constant, the mechanism of hydrolysis is between the autoaccelerated and autoretarded kinetics. In oilfield pro-
duced water (PH=9.1), hydrolysis rate is decreased with aging time, the mechanism of hydrolysis obeys an autoretarded kinetics. The hydrolysis of HPAM is more rapid in oilfield provduced water than in fresh water. The hydrolysis rate and mechanism depends mainly on the PH of HPAM solutions and the temperature of reservoir. The aging of low hydrolysis degree
HPAM solutions is a process of increasing viscosity and that of high hydrolysis degree HPAM solutions is a process of decreasing viscosity. The long-term thermal stability of HPAM solution would be improved by selecting the low hydrolysis degree HPAM.

Key words: partial hydrolysis, viscosity, degradation, stability

CLC Number:

TE357.431

KONG Bailing. STUDY ON THE HYDROLYSIS OF POLYACRYLAMIDE AT HIGH TEMPERATURE AND ITS SELECTION[J]. 西南石油大学学报(自然科学版), 2000, 22(1): 66-69.

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STUDY ON THE HYDROLYSIS OF POLYACRYLAMIDE AT HIGH TEMPERATURE AND ITS SELECTION

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