Volume 6, Issue 6, November 2018, Page: 201-213
Experimental and Theoretical Characterization of Sand-Carrying by Heavy Oil-Flow in a Horizontal Wellbore
Hong Gao, Wellbore Complex Flow and Well Completion Lab, China University of Petroleum, Beijing, China
Zhiming Wang, Wellbore Complex Flow and Well Completion Lab, China University of Petroleum, Beijing, China
Xiaoqiu Wang, Wellbore Complex Flow and Well Completion Lab, China University of Petroleum, Beijing, China
Dongying Wang, Wellbore Complex Flow and Well Completion Lab, China University of Petroleum, Beijing, China
Received: Nov. 13, 2018;       Accepted: Dec. 4, 2018;       Published: Jan. 18, 2019
DOI: 10.11648/j.ogce.20180606.22      View  36      Downloads  13
Abstract
The world's heavy oil reserves are very large. With the wide application of heavy oil cold recovery technology, the problem of blockage in oil well caused by the deposition of sand in the wellbore is becoming more and more serious. Therefore, it is very important to study the deposition and migration of sand in the wellbore. Based on indoor full-sized experimental apparatus simulating multiphase complex flows, the sand-carrying capacity of heavy oil in pipes is determined using a high-viscosity white oil and water mixture as the fluid medium, and by varying parameters such as the saturation, sand volume concentration, viscosity of heavy oil, and flow. A complete investigation is performed to obtain the basis of the sand flow in pipes and sand-bed development and migration. It is shown that the viscosity of heavy oil, main flow rate, and water content have a significant effect on the sand-carrying capacity of heavy oil, while the effect of the wall inflow on the pressure drop of the wellbore is relatively less. Based on the examination of the experimental flow pattern, an oil–water–sand-bed three-layer pressure drop model with a variable-mass flow is established for the first time. The minimum energy method is used to calculate the model. The model considers the diffusion of solid-phase particles and pressure drop by the fluid of the sand bed in heavy oil and is verified against the pressure drop data obtained from the experiments. The results show that the model is within an average relative error of 12.69%, which is satisfactory for practical engineering. Furthermore, the model provides a theoretical support for reasonable sand production in heavy oil reservoirs.
Keywords
Solid/Liquid Two-Phase Flow, Reasonable Sand Production, Sand-Carrying, Variable-Mass Flow, Flow Pattern
To cite this article
Hong Gao, Zhiming Wang, Xiaoqiu Wang, Dongying Wang, Experimental and Theoretical Characterization of Sand-Carrying by Heavy Oil-Flow in a Horizontal Wellbore, International Journal of Oil, Gas and Coal Engineering. Vol. 6, No. 6, 2018, pp. 201-213. doi: 10.11648/j.ogce.20180606.22
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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