Startseite Properties of high temperature resistance and salt tolerance drilling fluids incorporating acrylamide/2-acrylamido-2-methyl-1-propane sulfonic acid/N-vinylpyrrolidone/dimethyl diallyl ammonium chloride quadripolymer as fluid loss additives
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Properties of high temperature resistance and salt tolerance drilling fluids incorporating acrylamide/2-acrylamido-2-methyl-1-propane sulfonic acid/N-vinylpyrrolidone/dimethyl diallyl ammonium chloride quadripolymer as fluid loss additives

  • Junlin Su , Qi Chu EMAIL logo und Mao Ren
Veröffentlicht/Copyright: 6. März 2014
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Abstract

A quadripolymer of acrylamide (AM), 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS), N-vinylpyrrolidone (NVP) and dimethyl diallyl ammonium chloride (DMDAAC) was synthesized by solution free radical polymerization, and characterized using Fourier transform infrared (FTIR), gel permeation chromatography (GPC) and thermogravimetric analysis (TGA) methods. The rheological and filtrate properties of saturated brine-based fluid with AM/AMPS/NVP/DMDAAC quadripolymer were investigated before and after thermal aging tests. The apparent viscosity (AV), plastic viscosity (PV) and yield point (YP) increased and the filtrate volume decreased with increase in the concentration of AM/AMPS/NVP/DMDAAC quadripolymer after thermal aging test at 180°C for 16 h. The filtrate volume could be controlled when the concentration of AM/AMPS/NVP/DMDAAC quadripolymer reached 2.0% under these conditions. The filtrate volume of saturated brine-based fluid could be controlled effectively at a thermal aging temperature not exceeding 200°C and was smaller than that of the AM/AMPS/NVP terpolymer. The AM/AMPS/NVP/DMDAAC quadripolymer was better at improving the quality of a filter cake than the AM/AMPS/NVP terpolymer. The drilling fluid containing the AM/AMPS/NVP/DMDAAC quadripolymer had an excellent tolerance to salt and high temperature.


Corresponding author: Qi Chu, Sinopec Research Institute of Petroleum Engineering, Sinopec, Beijing 100101, People’s Republic of China, e-mail:

Acknowledgments

This work is supported by the Open Fund of State Key Laboratory of Oil and Gas Reservoir Geology of Southwest Petroleum University (PLN 1136) and Exploitation and the special fund of China’s central government for the development of local colleges and universities–the project of national first-level discipline in Oil and Gas Engineering (P030), China.

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Received: 2013-10-21
Accepted: 2013-11-28
Published Online: 2014-3-6
Published in Print: 2014-4-1

©2014 by Walter de Gruyter Berlin/Boston

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