Pressure Transient Analysis of the Fractured Vuggy Reservoir Model Coupling Oil Flow and Wave Propagation

DU Xin; LU Zhiwei; LI Dongmei; XU Yandong; LI Peichao; LU Detang

doi:10.21656/1000-0887.390123

Volume 40 Issue 4

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Article Navigation > Applied Mathematics and Mechanics > 2019 > 40(4): 355-374

DU Xin, LU Zhiwei, LI Dongmei, XU Yandong, LI Peichao, LU Detang. Pressure Transient Analysis of the Fractured Vuggy Reservoir Model Coupling Oil Flow and Wave Propagation[J]. Applied Mathematics and Mechanics, 2019, 40(4): 355-374. doi: 10.21656/1000-0887.390123

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Pressure Transient Analysis of the Fractured Vuggy Reservoir Model Coupling Oil Flow and Wave Propagation

doi: 10.21656/1000-0887.390123

¹Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, P.R.China;²Viterbi School of Engineering, University of Southern California, Los Angeles, California 90089, USA;³Northwest Oilfield Company of SINOPEC, Urumqi 834000, P.R.China;⁴School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, P.R.China

Funds: The National Science and Technology Major Project of China(2016ZX05053)

Received Date: 2018-04-18
Rev Recd Date: 2018-06-29
Publish Date: 2019-04-01

Abstract

Abstract

Fractured vuggy reservoirs consist of matrix, fractures and vugs. Researchers usually treat the matrix-fracture-vug interaction as inter-porosity flow due to their complex pore system and flow mechanism.In fact, vugs play an important role in fractured vuggy reservoirs and can’t be simplified to one homogeneous medium. The idea that pressure spreading in vugs is in form of wave, which is similar to pressure decline, was proposed. Based on that, an analytical well test model for fractured vuggy reservoirs combined with seepage equations for outer formation was presented. Then the log-log type curves of the wellbore pressure and its derivative were obtained through the Laplace transform and numerical inversion. The results show that, the pressure curve forms were influenced by dimensionless parameters related to flow and wave propagation, also by dimensionless parameters related to the outer formation. Sensitivity analysis of these parameters were done. Lastly, a field example was demonstrated to validate the accuracy of the proposed model, which matched the real geological data well.
- fractured vuggy reservoir,
- coupling of flow and wave propagation,
- Laplace transform,
- numerical inversion,
- log-log plot

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References(25)

References

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