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Critical Analysis of Productivity of Well 2L After Foam-Acid Diversion

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Proceedings of MEACM 2020 (MEACM 2020)

Part of the book series: Mechanisms and Machine Science ((Mechan. Machine Science,volume 99))

Abstract

Foam acid diversion is a widely adopted well stimulation technique based on its superior efficiency and applicability to reservoir layers with varying permeability. However, no study has critically analyzed the performance of a well after foam acid diversion operation from a field perspective. In this study, Well 2L was used as case study, and the field data obtained from the Nigerian Petroleum Development Company were carefully analyzed using pressure transient equations. A clustered column chart was used to compare the performance of the well before and after acid foam diversion. Combining the results of previous researches, the causes of formation damage due to the initial decline in the productivity of Well 2L was established. The results indicated that, first, a rapid decline in production of Well 2L before foam acid diversion was due to formation damage by drilling and completion operations previously carried out on the well. Second, after foam acid diversion, the productivity of Well 2L remarkably increased by 70%, suggesting that the application of foam acid diversion significantly improves oil recovery .

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Abbreviations

Ø:

Porosity

B:

Formation volume factor

BHP:

Bottom hole pressure

BS & W:

Base sediment and water

b/d:

Barrel per day

C3:

Clustered column chart

Ct:

Compressibility factor

H:

Total reservoir thickness

hp:

Height of perforation

ht:

Height of interval

J:

Productivity index

K:

Formation permeability

KH:

Horizontal permeability

Kv:

Vertical permeability

M:

Honer’s plot slope

mD:

Milli Darcy

Pavg:

Average pressure

Ppt:

Part per thousand

Pwf:

Flowing well pressure

Pws:

Static well pressure

ΔPs:

Pressure drop due to skin

Q:

Production flowrate

Sd:

Skin effect due to damage

Sp:

Skin due to incomplete perforation

tp:

Total production time

µ:

Viscosity

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Author information

Authors and Affiliations

  1. College of Petroleum Engineering, China University of Petroleum, Bei**g, 102249, Bei**g, China

    Chinedu J. Okere, Lihui Zheng, Guandong Su, Hao Liu & Qifan Chang

  2. Department of Industrial Production Engineering, Nnamdi Azikiwe University, Awka, 420110, Anambra, Nigeria

    Obiora J. Obiafudo

Authors
  1. Chinedu J. Okere
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  2. Lihui Zheng
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  3. Guandong Su
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  4. Hao Liu
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  5. Qifan Chang
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  6. Obiora J. Obiafudo
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Editor information

Editors and Affiliations

  1. School of Mechanical Engineering, University of Science and Technology Bei**g, Bei**g, China

    Lifang Zheng

  2. School of Mechanical Engineering, University of Science and Technology Bei**g, Bei**g, China

    Chaoyang Sun

  3. Newcastle University Singapore, Singapore, Singapore

    Kheng-Lim Goh

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Okere, C.J., Zheng, L., Su, G., Liu, H., Chang, Q., Obiafudo, O.J. (2021). Critical Analysis of Productivity of Well 2L After Foam-Acid Diversion. In: Zheng, L., Sun, C., Goh, KL. (eds) Proceedings of MEACM 2020. MEACM 2020. Mechanisms and Machine Science, vol 99. Springer, Cham. https://doi.org/10.1007/978-3-030-67958-3_3

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  • DOI: https://doi.org/10.1007/978-3-030-67958-3_3

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  • Online ISBN: 978-3-030-67958-3

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