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Volume 17
Issue 21
10.3390/en17215367
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Article

Phase Behavior and Rational Development Mode of a Fractured Gas Condensate Reservoir with High Pressure and Temperature: A Case Study of the Bozi 3 Block

by
Yongling Zhang
1,
Yangang Tang
1,
Juntai Shi
2,*,
Haoxiang Dai
3,
Xinfeng Jia
2,
Ge Feng
2,
Bo Yang
3 and
Wenbin Li
4
1
Tarim Oilfield Company, PetroChina, Korla 841000, China
2
College of Information and Control, China University of Petroleum, Beijing 102249, China
3
China United Coalbed Methane Co., Ltd., Taiyuan 030000, China
4
Research Institute of Oil Exploration and Development, Liaohe Oilfield of PetroChina, Panjin 124010, China
*
Author to whom correspondence should be addressed.
Energies 2024, 17(21), 5367; https://doi.org/10.3390/en17215367
Submission received: 25 September 2024 / Revised: 23 October 2024 / Accepted: 26 October 2024 / Published: 28 October 2024
(This article belongs to the Special Issue Oil and Gas Reservoirs: Phase Behavior, Seepage Mechanism, Productivity Prediction, and Novel Modelling Methods)
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Abstract

The Bozi 3 reservoir is an ultra-deep condensate reservoir (−7800 m) with a high temperature (138.24 °C) and high pressure (104.78 MPa), leading to complex phase behaviors. Few PVT studies could be referred in the literature to meet such high temperature and pressure conditions. Furthermore, it is questionable regarding the applicability of existing condensate production techniques to such a high temperature and pressure reservoir. This study first characterized the phase behavior via PVT experiments and EOS tuning. The operating conditions were then optimized through reservoir numerical simulation. Results showed that: (1) the critical condensate temperature and pressure of Bozi 3 condensate gas were 326.24 °C and 43.83 MPa, respectively; (2) four gases (methane, recycled dry gas, carbon dioxide, and nitrogen) were analyzed, and methane was identified as the optimal injection gas; (3) gas injection started when the production began to fall and achieved higher recovery than gas injection started when the pressure fell below the dew-point pressure; (4) simultaneous injection of methane at both the upper and lower parts of the reservoir can effectively produce condensate oil over the entire block. This scheme achieved 8690.43 m3 more oil production and 2.75% higher recovery factor in comparison with depletion production.
Keywords: PVT experiment; phase behavior; reservoir simulation; gas injection PVT experiment; phase behavior; reservoir simulation; gas injection

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MDPI and ACS Style

Zhang, Y.; Tang, Y.; Shi, J.; Dai, H.; Jia, X.; Feng, G.; Yang, B.; Li, W. Phase Behavior and Rational Development Mode of a Fractured Gas Condensate Reservoir with High Pressure and Temperature: A Case Study of the Bozi 3 Block. Energies 2024, 17, 5367. https://doi.org/10.3390/en17215367

AMA Style

Zhang Y, Tang Y, Shi J, Dai H, Jia X, Feng G, Yang B, Li W. Phase Behavior and Rational Development Mode of a Fractured Gas Condensate Reservoir with High Pressure and Temperature: A Case Study of the Bozi 3 Block. Energies. 2024; 17(21):5367. https://doi.org/10.3390/en17215367

Chicago/Turabian Style

Zhang, Yongling, Yangang Tang, Juntai Shi, Haoxiang Dai, Xinfeng Jia, Ge Feng, Bo Yang, and Wenbin Li. 2024. "Phase Behavior and Rational Development Mode of a Fractured Gas Condensate Reservoir with High Pressure and Temperature: A Case Study of the Bozi 3 Block" Energies 17, no. 21: 5367. https://doi.org/10.3390/en17215367

APA Style

Zhang, Y., Tang, Y., Shi, J., Dai, H., Jia, X., Feng, G., Yang, B., & Li, W. (2024). Phase Behavior and Rational Development Mode of a Fractured Gas Condensate Reservoir with High Pressure and Temperature: A Case Study of the Bozi 3 Block. Energies, 17(21), 5367. https://doi.org/10.3390/en17215367

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