A Novel Model Incorporating Geomechanics for a Horizontal Well in a Naturally Fractured Reservoir

Mingxian Wang, Guoqiang Xing, Zifei Fan, Wenqi Zhao, Lun Zhao and Heng Song
Additional contact information
Mingxian Wang: Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
Guoqiang Xing: Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
Zifei Fan: Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
Wenqi Zhao: Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
Lun Zhao: Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
Heng Song: Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China

Energies, 2018, vol. 11, issue 10, 1-28

Abstract: Fracture aperture of a fractured reservoir can be affected by both matrix elasticity and fracture compressibility when the reservoir pressure decreases, namely stress sensitivity. An elasticity parameter coupling Young’s modulus and Poisson’s ratio was introduced to reflect this geomechanical behavior, and a new model incorporating geomechanics was developed to analyze the flow behavior of a horizontal well in a naturally fractured reservoir. Pressure solutions for two cases—uniform-flux and infinite-conductivity—were derived, respectively. For the uniform-flux case, the effect of dimensionless elasticity parameter on the pressure-drop profile becomes stronger with continuing production, and the profile may be like a bow. Nine flow regimes can be observed on the transient response of the infinite-conductivity case. Stress sensitivity mainly affects the late-flow period and a larger dimensionless elasticity parameter causes a greater pressure drop. Due to stress sensitivity, the pressure derivative curve exhibits an upward tendency in the pseudo-radial flow regime, and the slope is greater than “1” in the pseudo-steady flow regime. For KT-I formation in the North Truva field, its elasticity parameter decreases with the increase of Young’s modulus or Poisson’s ratio and ranges from 8 × 10 −8 Pa −1 to 1.1 × 10 −7 Pa −1 . Meanwhile, the transient response of H519 has a slight negative correlation with Young’s modulus and Poisson’s ratio in the pseudo-steady flow regime.

Keywords: geomechanical property; elasticity parameter; horizontal well; naturally fractured reservoir; transient response; North Truva field (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: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1996-1073/11/10/2584/pdf (application/pdf)
https://www.mdpi.com/1996-1073/11/10/2584/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:11:y:2018:i:10:p:2584-:d:172461

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().