Integrated hydraulic fracturing techniques to enhance oil recovery from tight rocks

This study aims to provide a comprehensive review of all hydraulic fracture geometry modeling techniques available in the conventional and unconventional reservoirs. We are introducing a comparison study between major available hydraulic fracture modeling techniques, advantages, and disadvantages of each one according to the latest related studies. The study includes the three general families of models: 2D models, pseudo-3D models, and fully 3D models. Consequently, the results of this work can be used for selecting the proper model to simulate or stimulate the reservoir to enhance oil recovery using hydraulic fracturing. Also, these results can be used for any future updates related to hydraulic fracturing stimulation based on the comparisons that were conducted.

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A Comparative Study of Monotonic and Cyclic Injection Hydraulic Fracturing in Saturated Tight Rocks Under Triaxial Stress

Proceedings of the 8th Unconventional Resources Technology Conference ◽

10.15530/urtec-2020-2952 ◽

2020 ◽

Author(s):

Saurabh Goyal ◽

Mark E. Curtis ◽

Carl H. Sondergeld ◽

Chandra S. Rai

Keyword(s):

Hydraulic Fracturing ◽

Comparative Study ◽

Triaxial Stress ◽

Cyclic Injection ◽

Tight Rocks

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CARBON CAPTURE & STORAGE (CCS) - ENHANCE OIL RECOVERY (EOR) GLOBAL POTENTIAL IN INDONESIA

10.29118/ipa.124.09.o.051 ◽

2018 ◽

Author(s):

E. Syahrial

Keyword(s):

Oil Recovery ◽

Carbon Capture ◽

Enhance Oil Recovery ◽

Carbon Capture Storage

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Experience of hydrodynamic methods application to enhance oil recovery in carbonate formations of the Belarus Republic

Equipment and Technologies for Oil and Gas Complex ◽

10.30713/1999-6934-2018-5-54-61 ◽

2018 ◽

pp. 54-61

Author(s):

P.P. Povzhik ◽

◽

N.A. Demyanenko ◽

D.V. Serdyukov ◽

I.V. Zhuk ◽

...

Keyword(s):

Oil Recovery ◽

Carbonate Formations ◽

Enhance Oil Recovery

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Investigation on the effect of active-polymers with different functional groups for EOR

e-Polymers ◽

10.1515/epoly-2020-0007 ◽

2020 ◽

Vol 20 (1) ◽

pp. 61-68

Author(s):

Dong Zhang ◽

Jian Guang Wei ◽

Run Nan Zhou

Keyword(s):

Functional Groups ◽

Oil Recovery ◽

Molecular Size ◽

Type I ◽

Cleaning Efficiency ◽

Sweep Efficiency ◽

Profile Control ◽

Branched Chain ◽

Swept Volume ◽

Enhance Oil Recovery

AbstractActive-polymer attracted increasing interest as an enhancing oil recovery technology in oilfield development owing to the characteristics of polymer and surfactant. Different types of active functional groups, which grafted on the polymer branched chain, have different effects on the oil displacement performance of the active-polymers. In this article, the determination of molecular size and viscosity of active-polymers were characterized by Scatterer and Rheometer to detect the expanded swept volume ability. And the Leica microscope was used to evaluate the emulsifying property of the active-polymers, which confirmed the oil sweep efficiency. Results show that the Type I active-polymer have a greater molecular size and stronger viscosity, which is a profile control system for expanding the swept volume. The emulsification performance of Type III active-polymer is more stable, which is suitable for improving the oil cleaning efficiency. The results obtained in this paper reveal the application prospect of the active-polymer to enhance oil recovery in the development of oilfields.

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Modeling Near-Miscible Gas Foam Injection in Fractured Tight Rocks and Its Challenges

Energies ◽

10.3390/en14071998 ◽

2021 ◽

Vol 14 (7) ◽

pp. 1998

Author(s):

Haishan Luo ◽

Kishore K. Mohanty

Keyword(s):

Oil Recovery ◽

Fractured Rock ◽

Gas Injection ◽

Gas Composition ◽

Gas Oil ◽

Rock Matrix ◽

Reducing Gas ◽

Tight Reservoirs ◽

Modeling Strategy ◽

Tight Rocks

Unlocking oil from tight reservoirs remains a challenging task, as the existence of fractures and oil-wet rock surfaces tends to make the recovery uneconomic. Injecting a gas in the form of a foam is considered a feasible technique in such reservoirs for providing conformance control and reducing gas-oil interfacial tension (IFT) that allows the injected fluids to enter the rock matrix. This paper presents a modeling strategy that aims to understand the behavior of near-miscible foam injection and to find the optimal strategy to oil recovery depending on the reservoir pressure and gas availability. Corefloods with foam injection following gas injection into a fractured rock were simulated and history matched using a compositional commercial simulator. The simulation results agreed with the experimental data with respect to both oil recovery and pressure gradient during both injection schedules. Additional simulations were carried out by increasing the foam strength and changing the injected gas composition. It was found that increasing foam strength or the proportion of ethane could boost oil production rate significantly. When injected gas gets miscible or near miscible, the foam model would face serious challenges, as gas and oil phases could not be distinguished by the simulator, while they have essentially different effects on the presence and strength of foam in terms of modeling. We provide in-depth thoughts and discussions on potential ways to improve current foam models to account for miscible and near-miscible conditions.

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