Numerical Investigation of Downhole Perforation Pressure for a Deepwater Well

Qiao Deng, Hui Zhang, Jun Li, Xuejun Hou and Binxing Zhao
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Qiao Deng: College of Petroleum Engineering, China University of Petroleum-Beijing, 18 Fuxue Road, Changping 102249, China
Hui Zhang: College of Petroleum Engineering, China University of Petroleum-Beijing, 18 Fuxue Road, Changping 102249, China
Jun Li: College of Petroleum Engineering, China University of Petroleum-Beijing, 18 Fuxue Road, Changping 102249, China
Xuejun Hou: School of Petroleum Engineering, Chongqing University of Science & Technology, 20 East Road, University City, Shapingba District, Chongqing 401331, China
Binxing Zhao: School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China

Energies, 2019, vol. 12, issue 19, 1-21

Abstract: During the production of deepwater wells, downhole perforation safety is one of the key technical problems. The perforation fluctuating pressure is an important factor in assessing the wellbore safety threat. Due to difficulty in describing the downhole perforation pressure by using the existing empirical correlations, a prediction model based on data fitting of a large number of numerical simulations has been proposed. Firstly, a numerical model is set up to obtain the dynamic data of downhole perforation, and the exponential attenuation model of perforation pressure in the wellbore is established. Secondly, a large number of numerical simulations have been carried out through orthogonal test design. The results reveal that the downhole perforation pressure is logarithmic to the total charge quantity, increases linearly to the wellbore initial pressure, shows an exponential relationship with downhole effective volume for perforation, and has a power relationship with the thickness of casing and cement as well as formation elastic modulus. Thirdly, the prediction of perforation peak pressure at different positions along the wellbore agrees well with the field measurement within a 10% error. Finally, the results of this study have been applied in the field case, and an optimization scheme for deepwater downhole perforation safety has been put forward.

Keywords: deepwater well; perforation safety; peak pressure; numerical model; orthogonal test (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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