Volume 7, Issue 5, October 2018, Page: 54-58
Performance Evaluation of Synthetic-Based Drilling Fluid with Flat Rheology
Tie Geng, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, China; Oilfield Chemicals R&D Institute, COSL, Sanhe, China
Zhengsong Qiu, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, China
Hailong Miao, Oilfield Chemicals R&D Institute, COSL, Sanhe, China
Wei Zhang, Oilfield Chemicals R&D Institute, COSL, Sanhe, China
Ke Lei, Oilfield Chemicals R&D Institute, COSL, Sanhe, China
Received: Oct. 12, 2018;       Accepted: Oct. 31, 2018;       Published: Nov. 19, 2018
DOI: 10.11648/j.ijepe.20180705.11      View  64      Downloads  22
Abstract
In offshore deepwater drilling, because of the low temperature aroud seafloor, the conventional synthetic-based drilling fluid becomes very thick, resulting in severe loss of drilling fluid during drilling through the deepwater formations with a narrow safe-density window. Therefore, it is important to improve the rheological properties of drilling fluid at deepwater drilling conditions. In this work, by investigating the effects of the key components including the base oil, emulsifier, wetting agent and rheology modifier on the rheological properties of synthetic-based drilling fluid at 4°C to 65°C, the optimal additives were selected, and a synthetic-based drilling fluid with flat-rheology characteristics was developed. It was found that the gas-to-liquid oil had low viscosity at a low temperature, and was suitable for preparing deepwater drilling fluids. The evaluation experiments show that at 4°C to 65°C, the drilling fluid could maintain stable yield point, 10-min Gel and 6 r/min reading value at a density of 0.9-1.5 g/cm3 even after high temperature aging, while the rheological properties of the conventional synthetic-based drilling fluid were significantly influence by the low temperature. Moreover, it showed excellent performance in filtration reduction and shale inhibition, and could maintain good properties even being contaminated by seawater. Therefore, its stable rheological properties at the deepwater drilling temperature range can effectively control the equivalent circulating density, thus reducing the risk of drilling fluid loss during deepwater drilling.
Keywords
Flat-Rheology, Synthetic-Based Drilling Fluid, Deepwater Drilling, Low Temperature
To cite this article
Tie Geng, Zhengsong Qiu, Hailong Miao, Wei Zhang, Ke Lei, Performance Evaluation of Synthetic-Based Drilling Fluid with Flat Rheology, International Journal of Energy and Power Engineering. Vol. 7, No. 5, 2018, pp. 54-58. doi: 10.11648/j.ijepe.20180705.11
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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