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Home > Journals > SCIREA Journal of Energy > Archive > Paper Information

Study on the Factors Affecting the Annulus Pressure of Riserless Mud Recovery System

Volume 4, Issue 4, August 2019    |    PP. 62-82    |PDF (1112 K)|    Pub. Date: December 17, 2019
9 Downloads     199 Views  

Author(s)
Xin Li, State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China
Jie Zhang, State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China
Meng Zhang, Fifth Drilling Branch, China Bohai Drilling Engineering Company Limited, Hejian, China
Peigang Wang, State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China
Gezhen Mao, State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China
Xuefeng Sun, State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China

Abstract
The precise control of the annulus pressure involves the problems of drilling safety and drilling cost, which have always been the focus of drilling engineering. In this paper, combined with the characteristics of the riserless mud recovery (RMR) system, the calculation method of equivalent circulating density (ECD) and annulus pressure of RMR system is proposed. According to the characteristics of the heat exchange of the RMR system, a mathematical model of the thermal field in the annulus is established. The variation law of thermal field in the annulus of some well sections was simulated by computational fluid dynamics (CFD) software. Comparing the CFD analysis results with the calculation results of mathematical models, the feasibility of the mathematical model is verified, and the temperature variation curve in the annulus is obtained. Based on the drilling data of a vertical well in the South China Sea, this paper analyzes the effects of seawater depth, equivalent static density (ESD) of drilling fluid, cuttings concentration and discharge capacity on the annulus pressure and ECD of the RMR system.

Keywords
RMR, annulus pressure, ECD, thermal field, influencing factors

Cite this paper
Xin Li, Jie Zhang, Meng Zhang, Peigang Wang, Gezhen Mao, Xuefeng Sun, Study on the Factors Affecting the Annulus Pressure of Riserless Mud Recovery System, SCIREA Journal of Energy. Vol. 4 , No. 4 , 2019 , pp. 62 - 82 .

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