Transient flows in a wellbore during killing of an empty well

Failure to adequately equipping the wellhead with appropriate well control equipment may result in a high pressure in the gas drilling when it reaches a high-yield gas layer. This would require the execution of a well killing operation to facilitate follow-up drilling and well completion. A...

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Main Authors: Jiang Lin, Wei Na, Liu An-Qi, Meng Ying-Feng, Li Hai-Tao, Sun Wan-Tong, Zheng Li-Jun, Fu Qiang, Pang Wei-Xin
Format: Article
Language:English
Published: VINCA Institute of Nuclear Sciences 2019-01-01
Series:Thermal Science
Subjects:
Online Access:http://www.doiserbia.nb.rs/img/doi/0354-9836/2019/0354-98361904297J.pdf
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spelling doaj-0f132bfee79c4e87a9d4bd77215b685c2021-01-02T08:12:47ZengVINCA Institute of Nuclear SciencesThermal Science0354-98362019-01-012342297230610.2298/TSCI1904297J0354-98361904297JTransient flows in a wellbore during killing of an empty wellJiang Lin0Wei Na1Liu An-Qi2Meng Ying-Feng3Li Hai-Tao4Sun Wan-Tong5Zheng Li-Jun6Fu Qiang7Pang Wei-Xin8State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaGeological Explorations and Development Institute, Chuan Qing Drilling Engineering Company Limited, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaChina National Offshore Oil Corporation, Beijing, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaChina National Offshore Oil Corporation, Research Institute Limited Liability Company, Beijing, ChinaFailure to adequately equipping the wellhead with appropriate well control equipment may result in a high pressure in the gas drilling when it reaches a high-yield gas layer. This would require the execution of a well killing operation to facilitate follow-up drilling and well completion. An empty well of gas-phase brings implementation of a gas-liquid two-phase transient flow, filling with killing mud. The operation may also entail coupling of the transient seepage from the formation with the gas-liquid two-phase transient flow through the wellbore. In this study, a mathematical model and a numerical method for coupling the transient gas flow through the formation with the gas-liquid two-phase transient flow in the wellbore were developed. The numerical simulation results showed that successful killing of an empty gas-drilled well required proper co-ordination of several key parameters among which the wellhead backpressure is particularly crucial to the operation. The findings of this study promise to facilitate the pro-cess design and parameter optimization for the killing of empty gas-drilled wells.http://www.doiserbia.nb.rs/img/doi/0354-9836/2019/0354-98361904297J.pdfgas drillingwell controlgas-liquid two-phase transient flowformation seepagewell killing
collection DOAJ
language English
format Article
sources DOAJ
author Jiang Lin
Wei Na
Liu An-Qi
Meng Ying-Feng
Li Hai-Tao
Sun Wan-Tong
Zheng Li-Jun
Fu Qiang
Pang Wei-Xin
spellingShingle Jiang Lin
Wei Na
Liu An-Qi
Meng Ying-Feng
Li Hai-Tao
Sun Wan-Tong
Zheng Li-Jun
Fu Qiang
Pang Wei-Xin
Transient flows in a wellbore during killing of an empty well
Thermal Science
gas drilling
well control
gas-liquid two-phase transient flow
formation seepage
well killing
author_facet Jiang Lin
Wei Na
Liu An-Qi
Meng Ying-Feng
Li Hai-Tao
Sun Wan-Tong
Zheng Li-Jun
Fu Qiang
Pang Wei-Xin
author_sort Jiang Lin
title Transient flows in a wellbore during killing of an empty well
title_short Transient flows in a wellbore during killing of an empty well
title_full Transient flows in a wellbore during killing of an empty well
title_fullStr Transient flows in a wellbore during killing of an empty well
title_full_unstemmed Transient flows in a wellbore during killing of an empty well
title_sort transient flows in a wellbore during killing of an empty well
publisher VINCA Institute of Nuclear Sciences
series Thermal Science
issn 0354-9836
publishDate 2019-01-01
description Failure to adequately equipping the wellhead with appropriate well control equipment may result in a high pressure in the gas drilling when it reaches a high-yield gas layer. This would require the execution of a well killing operation to facilitate follow-up drilling and well completion. An empty well of gas-phase brings implementation of a gas-liquid two-phase transient flow, filling with killing mud. The operation may also entail coupling of the transient seepage from the formation with the gas-liquid two-phase transient flow through the wellbore. In this study, a mathematical model and a numerical method for coupling the transient gas flow through the formation with the gas-liquid two-phase transient flow in the wellbore were developed. The numerical simulation results showed that successful killing of an empty gas-drilled well required proper co-ordination of several key parameters among which the wellhead backpressure is particularly crucial to the operation. The findings of this study promise to facilitate the pro-cess design and parameter optimization for the killing of empty gas-drilled wells.
topic gas drilling
well control
gas-liquid two-phase transient flow
formation seepage
well killing
url http://www.doiserbia.nb.rs/img/doi/0354-9836/2019/0354-98361904297J.pdf
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