Coupling Study of Fracture Propagation–Filtration–Seepage during Hydraulic Fracturing Assisted Oil Displacement in Offshore Low-Permeability Reservoirs DOI Creative Commons

Feng Wei,

Mingguang Tang,

Xuan Deng

et al.

ACS Omega, Journal Year: 2024, Volume and Issue: 10(1), P. 1761 - 1771

Published: Dec. 26, 2024

Offshore low-permeability reservoirs are mainly composed of complex fault-block structures with poor physical properties, which makes establishing an effective displacement relationship particularly challenging. Hydraulic fracturing assisted oil (HFAD) can effectively increase the production a single well by creating fractures to replenish producing energy. In this study, Khristianovich–Geertsma–de Klerk (KGD) model is used calculate propagation vertical fractures, and flow tube method two-phase oil–water in filtration seepage. The semianalytical mathematical for coupling fracture propagation, filtration, seepage HFAD fluid established, followed conducting sensitivity analysis main controlling factors analysis. contrast conventional methods, during process taken into account. Based on actual data, half-length wellhead pressure verified. mean calculation accuracy 88.5%, 90.7%. research results indicate that occur simultaneously, including rapid early stage, discontinuous middle only infiltration without later stage. Infiltration considered key factor HFAD, higher rate leading weaker energy storage at tip. viscosity significantly impacts distance, contributing 35% 27%, respectively. To half-length, select thinner reservoir, viscosity, boost injection rate. choose permeability reservoirs, reduce cumulative volume. study provide valuable basis design construction scheme offshore reservoirs.

Language: Английский

Numerical investigation of fracture competitive propagation mechanisms for temporary plugging staged fracturing (TPSF) in shale gas reservoirs DOI
Jianxiong Li,

Zhanyuan Zhu,

Wen Hua

et al.

Computers and Geotechnics, Journal Year: 2025, Volume and Issue: 180, P. 107109 - 107109

Published: Jan. 27, 2025

Language: Английский

Citations

0
Algebraic multigrid method for tight oil reservoir simulation with nonlinear seepage DOI
Long Li,

Zhong Jinrui,

Qinghua Feng

et al.

Geosystem Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 7

Published: Feb. 8, 2025

Language: Английский

Citations

0
Research on Shale Fracture Propagation Control Based on the Perforation Sealing Law of Ball Sealer DOI
Qianli Lu,

B. Kuang,

Jianchun Guo

et al.

Published: April 21, 2025

Abstract During shale gas well fracturing, the equilibrium of fracture propagation is poor due to influence formation heterogeneity and stress interference between fractures. Wellbore temporary plugging an effective measure control propagation. However, in perforation parameters mainly rely on empirical design. Under same parameters, effect production different fracturing sections are quite different, which reflects law ball sealer sealing unclear. To solve above problems, this paper built a CFD-DEM horizontal wellbore model, analyzes migration characteristics sealer, forms judgment conditions for holes. On basis, adaptive model by coupling flow distribution phase field model. This can realize calculation position path after plugging. Based Weiyuan block Sichuan Basin, simulation under multi-cluster was carried out. The results show that fractures at heel side toe propagate faster uniform mode. Additionally, simulated preferentially seals holes side. After plugging, inhibited, over-propagated. Therefore, we propose variable number mode, each cluster gradually increases from side, slowly. In process sealed, thereby accelerates slow-propagation ultimately forming overall more balanced morphology. study applied WH6 block. Compared with section perforation, coefficient increased 41.3 %, sand influx variation decreased 38.7 %. findings great significance guide optimization design scheme wells, helpful improve reservoir effect.

Language: Английский

Citations

0
Mechanistic Study on the Effect of Seepage Force on Fracture Propagation Behavior in Multi-cluster Fracturing of Horizontal Wells DOI Creative Commons
Haiyang Wang, Yufei Wang, Xu Su

et al.

Petroleum Research, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Language: Английский

Citations

0
Study on the Interaction Propagation Mechanism of Inter-Cluster Fractures under Different Fracturing Sequences DOI Open Access

Xiaojun Cai,

Weixuan Zhao,

Tianbao Hu

et al.

Processes, Journal Year: 2024, Volume and Issue: 12(5), P. 971 - 971

Published: May 10, 2024

Horizontal-well multi-cluster fracturing is one of the most important techniques for increasing recovery rate in unconventional oil and gas reservoir development. However, under influence complex induced stress fields, mechanism interaction propagation fractures within each segment remains unclear. In this study, based on rock fracture criteria, combined with boundary element displacement discontinuity method, a two-dimensional numerical simulation model hydraulic crack planar plane was established. Using model, process inter-cluster different sequences horizontal well segments field effects were analyzed. The cluster spacing, design length, internal pressure morphology also investigated. research results indicate that, when using alternating it advisable to appropriately increase spacing weaken inhibitory effect around created by prior subsequent fracturing. Compared symmetrical method more complex. At smaller are susceptible being captured from findings study provide reliable theoretical support optimization processes segments.

Language: Английский

Citations

2
Discrete element-based multi-cluster hydraulic fracture extension study with temporary plugging and fracturing in horizontal wells DOI
Hui Xiao, Han Zhang, Chunbing Wang

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(6)

Published: June 1, 2024

In this paper, a two dimensional-discrete element method complex fracture extension model was developed to simulate the behavior in reservoirs during multi-cluster perforation fracturing of horizontal wells by particulate flow and considering temporary plugging conditions. The effect particle inhomogeneity on fractures, change extending characteristics before after plugging, geological construction parameters fractures under consideration conditions are investigated model. results show that: (1) middle cluster is more difficult extend than outermost due interstitial stress interference; increased nonuniformity particles aggravates interference favors shear extension. (2) Fractures expand substantially when fluid reaches 3/4 total volume; it can promote uniform increase length but formed easy be captured at ends along it, not form fractures; timing based percentage clusters with already formed, being preferred. (3) principal difference mainly affects direction extension; number uniformity

Language: Английский

Citations

1
Coupling Study of Fracture Propagation–Filtration–Seepage during Hydraulic Fracturing Assisted Oil Displacement in Offshore Low-Permeability Reservoirs DOI Creative Commons

Feng Wei,

Mingguang Tang,

Xuan Deng

et al.

ACS Omega, Journal Year: 2024, Volume and Issue: 10(1), P. 1761 - 1771

Published: Dec. 26, 2024

Offshore low-permeability reservoirs are mainly composed of complex fault-block structures with poor physical properties, which makes establishing an effective displacement relationship particularly challenging. Hydraulic fracturing assisted oil (HFAD) can effectively increase the production a single well by creating fractures to replenish producing energy. In this study, Khristianovich–Geertsma–de Klerk (KGD) model is used calculate propagation vertical fractures, and flow tube method two-phase oil–water in filtration seepage. The semianalytical mathematical for coupling fracture propagation, filtration, seepage HFAD fluid established, followed conducting sensitivity analysis main controlling factors analysis. contrast conventional methods, during process taken into account. Based on actual data, half-length wellhead pressure verified. mean calculation accuracy 88.5%, 90.7%. research results indicate that occur simultaneously, including rapid early stage, discontinuous middle only infiltration without later stage. Infiltration considered key factor HFAD, higher rate leading weaker energy storage at tip. viscosity significantly impacts distance, contributing 35% 27%, respectively. To half-length, select thinner reservoir, viscosity, boost injection rate. choose permeability reservoirs, reduce cumulative volume. study provide valuable basis design construction scheme offshore reservoirs.

Language: Английский

Citations

1