scholarly journals Structural Controls on the Development of Sweet Spots in Tight Reservoirs

2009 ◽  
Author(s):  
M.H. Khalil
Keyword(s):  
Structural Controls ◽  
Tight Reservoirs ◽  
Sweet Spots

DEEP-SEATED STRUCTURAL CONTROLS AND SALTWATER INTRUSION ON ST. CATHERINES ISLAND, GEORGIA

2019 ◽  
Author(s):  
James S. Reichard ◽  
◽  
R. Kelly Vance ◽  
Jacque L. Kelly ◽  
Brian K. Meyer
Keyword(s):  
Saltwater Intrusion ◽  
Structural Controls

STRUCTURAL CONTROLS ON KIMBERLITE FORMATION IN THE ANABAR MEGABLOCK

1986 ◽  
Vol 28 (11) ◽  
pp. 1336-1345
Author(s):  
A. A. Dukhovskiy ◽  
N. A. Artamonova ◽  
G. M. Belyayev ◽  
K. N. Nikishov
Keyword(s):  
Structural Controls

A fractal model for quantitative evaluating the effects of spontaneous imbibition and displacement on the recovery of tight reservoirs

2021 ◽  
Vol 198 ◽  
pp. 108120
Author(s):  
Zhongwei Wu ◽  
Chuanzhi Cui ◽  
Yinzhu Ye ◽  
Xiangzhi Cheng ◽  
Japan Trivedi
Keyword(s):  
Fractal Model ◽  
Spontaneous Imbibition ◽  
Tight Reservoirs

scholarly journals Ball sealer tracking and seating of temporary plugging fracturing technology in the perforated casing of a horizontal well

2021 ◽  
pp. 014459872110204
Author(s):  
Wan Cheng ◽  
Chunhua Lu ◽  
Guanxiong Feng ◽  
Bo Xiao
Keyword(s):  
Critical Parameter ◽  
Fluid Velocity ◽  
Stable State ◽  
Horizontal Wells ◽  
Terminal Velocity ◽  
Injection Rate ◽  
Fracturing Fluid ◽  
Perforation Hole ◽  
Horizontal Wellbore ◽  
Tight Reservoirs

Multistaged temporary plugging fracturing in horizontal wells is an emerging technology to promote uniform fracture propagation in tight reservoirs by injecting ball sealers to plug higher-flux perforations. The seating mechanism and transportation of ball sealers remain poorly understood. In this paper, the sensitivities of the ball sealer density, casing injection rate and perforation angle to the seating behaviors are studied. In a vertical wellbore section, a ball sealer accelerates very fast at the beginning of the dropping and reaches a stable state within a few seconds. The terminal velocity of a non-buoyant ball is greater than the fluid velocity, while the terminal velocity of a buoyant ball is less than the fluid velocity. In the horizontal wellbore section, the terminal velocity of a non-buoyant or buoyant ball is less than the fracturing fluid flowing velocity. The ball sealer density is a more critical parameter than the casing injection rate when a ball sealer diverts to a perforation hole. The casing injection rate is a more critical parameter than the ball sealer density when a ball sealer seats on a perforation hole. A buoyant ball sealer associated with a high injection rate of fracturing fluid is highly recommended to improve the seating efficiency.

Automatic identification of sweet spots from MERs for electrodes implantation in STN-DBS

2021 ◽  
Author(s):  
Linxia Xiao ◽  
Caizi Li ◽  
Yanjiang Wang ◽  
Weixin Si ◽  
Doudou Zhang ◽  
...  
Keyword(s):  
Automatic Identification ◽  
Stn Dbs ◽  
Sweet Spots

CO2-responsive preformed gel particles with interpenetrating networks for controlling CO2 breakthrough in tight reservoirs

2021 ◽  
Vol 613 ◽  
pp. 126065
Author(s):  
Wan-fen Pu ◽  
Dai-jun Du ◽  
Huan-cai Fan ◽  
Bo-wen Chen ◽  
Cheng-Dong Yuan ◽  
...  
Keyword(s):  
Interpenetrating Networks ◽  
Gel Particles ◽  
Tight Reservoirs

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

Energies ◽  
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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