Numerical Simulation of Hydraulic Fracturing in Weakly Consolidated Sandstone

Fan, Baitao; Deng, Jingen; Lin, Haifei; Liu, Wei; Tan, Qiang

doi:10.1007/s10553-018-0884-0

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…The input information for the simulation of hydraulic fracturing in multilayer zones for the unconsolidated formation is provided in Table 1. The input data for the numerical model are all from on-site actual relevant data and indoor experimental data [27]. As shown in Figure 4, the distribution diagram of the cohesive force unit nodes in the model.…”

Section: Numerical Model Setupmentioning

confidence: 99%

Numerical Simulation of Hydraulic Fracture Propagation on Multilayered Formation Using Limited Entry Fracturing Technique

Liu,

Ji,

Huang

et al. 2024

Processes

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Hydraulic fracturing is one of the most effective stimulation methods for unconsolidated sandstone reservoirs. However, the design of hydraulic fracturing must take into account the mechanical and stress properties of different geological formations between layers. In this paper, a three-dimensional coupled fluid-solid model using the finite element method is developed to investigate multiple vertical fractures at different depths along a vertical wellbore under different geological and geomechanical conditions. The finite element model does not require further refinement of any new cracks, requiring much smaller degrees of freedom and higher computational efficiency. In addition, new elements were used to account for local pressure drop due to perforation entry friction along the vertical wellbore. Numerical simulation results indicate that hydraulic fracture connections are observed from adjacent layers. Furthermore, the low stress contrast and high Young’s modulus between the layers increases the likelihood of multiple fracture connections. Higher fluid leakage rates increase the likelihood of fracture branching, but decrease the area of fracture coverage near the wellbore. Increasing fluid viscosity is effective in improving the area of fracture coverage near the wellbore. These findings are useful for the design of hydraulic fracturing in multi-layered formations in unconsolidated sandstone formations.

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Section: Numerical Model Setupmentioning

confidence: 99%

Numerical Simulation of Hydraulic Fracture Propagation on Multilayered Formation Using Limited Entry Fracturing Technique

Liu,

Ji,

Huang

et al. 2024

Processes

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“…Meanwhile, the fractures are also assigned the same values except the permeability. According to Fan et al, the fracture length and width in weakly consolidated sandstone can be up to 28 m and 30 mm when using high‐efficiency fracturing fluid, respectively. In addition, Konno et al have also investigated the fracture characteristics in unconsolidated sediments by cyclic fracturing using X‐ray computed tomography.…”

Section: Simulation Modelmentioning

confidence: 99%

Gas production from a silty hydrate reservoir in the South China Sea using hydraulic fracturing: A numerical simulation

Sun

Ning

Liu

et al. 2019

Energy Science & Engineering

119

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The low permeability of silty hydrate reservoirs in the South China Sea is a critical issue that threatens safe, efficient, and long‐term gas production from these reservoirs. Hydraulic fracturing is a potentially promising stimulation technology for such low‐permeability reservoirs. Here, we assess the gas production potential of a depressurization horizontal well that is assisted by the hydraulic fracturing using numerical simulation according to field data at site SH2 in this area. In addition, the number of horizontal wells drilled is discussed if commercial production is to be performed at this site. The results show that the production potential can be significantly stimulated at the early production stage by adopting hydraulic fracturing in this reservoir due to a better depressurization effect. However, the increase in gas recovery gradually decreases with the continuous dissociation of gas hydrates, and the evolution trend is similar to that in a reservoir without stimulation during later periods of gas production because the dissociation front gradually moves away from the fractures. From the perspective of production potential, using a horizontal well scheme assisted by the hydraulic fracturing technology for gas recovery from a hydrate deposit can sharply reduce the number of operation wells, shorten the drilling operation time, and boost the economic efficiency. The horizontal well scheme may be an effective way to increase the gas yield if the application of quickly deployed horizontal wells and hydraulic fracturing techniques in such hydrate reservoirs greatly increases in the near future.

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“…Meanwhile, the permeability is reduced, the microscopic pore throats are blocked by sand particles, and the dominant seepage channel for crude oil is reduced. − Improving single-well productivity under the premise of effective sand control is the key to the development of unconsolidated sandstone reservoirs. Fan et al believed that fracturing and packing technology can effectively control sand and increase production by changing the migration state of oil and water . Walters et al believed that by forming short and wide fractures and filling with a high sand ratio in the reservoir, a bilinear flow of reservoir fluid can be formed near high-conductivity fractures, and the formation of sand production can be alleviated .…”

Section: Introductionmentioning

confidence: 99%

“…Fan et al believed that fracturing and packing technology can effectively control sand and increase production by changing the migration state of oil and water. 9 Walters et al believed that by forming short and wide fractures and filling with a high sand ratio in the reservoir, a bilinear flow of reservoir fluid can be formed near high-conductivity fractures, and the formation of sand production can be alleviated. 10 Huang et al first proposed the use of nanoparticles to prevent the migration of reservoir particles using special nanoparticles (nanocrystals) to immobilize the reservoir particles in the hydraulic fracturing pack.…”

Section: Introductionmentioning

confidence: 99%

Influence of Sand Production Damage in Unconsolidated Sandstone Reservoirs on Pore Structure Characteristics and Oil Recovery at the Microscopic Scale

Luo²,

Yu³

et al. 2022

ACS Omega

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Unconsolidated sandstone reservoirs have low rock strength and are easily damaged by sand production. To evaluate the effect of the microscopic pore system on the degree of recovery and sand production damage, five typical unconsolidated sandstone core samples were selected. The nuclear magnetic resonance T 2 spectrum of the water-flooding experiments was used to analyze the oil displacement mechanism and sand production damage of the pore throat structure, and the control mechanism of the injection parameters was used to evaluate the recovery and sand production damage degree. The results showed that the recovery of the unconsolidated sandstone core samples was the highest when the injection volume was 6 PV, and the overall pore throat recovery increased from 14.37 to 48.72%. The recovery and sand production damage increased with increasing injection pressure. The overall pore throat recovery was the highest when the pressure was 20 MPa (48.42%), and the sand production damage index was the maximum when the pressure was 25 MPa (19.98%). Under a lower injection pressure, sand production damage mainly originates from loose sand. The main target of loose sand production damage is a smaller pore throat, and the sand production index increases slowly. The recovery increased with the pressure and increased relatively quickly. Under a higher injection pressure, sand production damage mainly comes from loose sand and skeleton sand, causing damage to both smaller and larger pore throats. The sand production damage is positively correlated with injection pressure. The recovery slows down with an increase in pressure or even decreases.

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Numerical Simulation of Hydraulic Fracturing in Weakly Consolidated Sandstone

Cited by 5 publications

References 9 publications

Numerical Simulation of Hydraulic Fracture Propagation on Multilayered Formation Using Limited Entry Fracturing Technique

Numerical Simulation of Hydraulic Fracture Propagation on Multilayered Formation Using Limited Entry Fracturing Technique

Gas production from a silty hydrate reservoir in the South China Sea using hydraulic fracturing: A numerical simulation

Influence of Sand Production Damage in Unconsolidated Sandstone Reservoirs on Pore Structure Characteristics and Oil Recovery at the Microscopic Scale

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