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Journal of Chemistry
Volume 2017 (2017), Article ID 3737510, 7 pages
https://doi.org/10.1155/2017/3737510
Research Article

Preparation and Evaluation of a Profile Control Agent Base on Waste Drilling Fluid

Drilling and Production Technology Research Institute, PetroChina Jidong Oilfield Company, Tangshan 063004, China

Correspondence should be addressed to Xiaoping Qin; moc.qq@727108849

Received 22 November 2016; Revised 13 February 2017; Accepted 26 February 2017; Published 12 March 2017

Academic Editor: Nicolas Roche

Copyright © 2017 Xiaoping Qin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The waste drilling fluid was treated by a flocculant and a pH regulator. And a novel profile control agent base on waste drilling fluid (PCAWDF) was prepared using polymer, formaldehyde, resorcinol, and thiourea as raw materials under mild conditions. PCAWDF was characterized by infrared (IR) spectroscopy and scanning electron microscope (SEM). Compared with the profile control agent prepared by the recirculated water (PCARW), PCAWDF exhibited comparable or better stability, salt resistance, and viscoelasticity. The results of parallel core plugging experiments showed that the profile improvement capability of PCAWDF was stronger than that of PCARW (for 3000 mg/L: 84.6% versus 83.1%; for 5000 mg/L: 91.8% versus 90.2%). The main performance indexes of PCAWDF could meet the need of profile control for the water injection wells. The method could solve the problem of waste drilling fluid treatment in an economic and environmental way.