Comprehensive Study of Polymer Gel Profile Control for Wag Process in Fractured Reservoir: Using Experimental and Numerical Simulation

2016 ◽  
Author(s):  
K. Xiao ◽  
L. Mu ◽  
X. Wu ◽  
L. Yang ◽  
F. Xu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Polymer Gel ◽  
Fractured Reservoir ◽  
Profile Control ◽  
Comprehensive Study

scholarly journals Optimization of development mode of asphalt profile control based on numerical simulation and study of its mechanism

2020 ◽  
Vol 75 ◽  
pp. 30
Author(s):  
Fulin Wang ◽  
Tao Yang ◽  
Yunfei Zhao ◽  
Yanjun Fang ◽  
Fuli Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Oil Recovery ◽  
Evaluation System ◽  
Injection Rate ◽  
Injection System ◽  
Injection Timing ◽  
High Concentration ◽  
Development Mode ◽  
Displacement Effect ◽  
Profile Control

Asphalt profile control is an effective method, which can further improve oil recovery of reservoir polymer flooded, it has a lot of advantages including high strength profile control, seal strata formation efficiency, low cost and no pollution, but there has not a perfect evaluation system for its development mode. The effect of different concentration, injection rate, radius of profile control, the timing of profile and segment combination way on the oil displacement effect of the asphalt profile control were researched using numerical simulation method on actual typical well area in Daqing oilfield, and the mechanism of asphalt profile control was studied in detail. According to the results of laboratory test, the largest Enhanced Oil Recovery (EOR) of asphalt was obtained at injection concentration 4000 mg/L, and the best combination was “high–low–high” concentration slug mode. According to the results of numerical simulation, the best concentration, injection rate, radius of profile control and injection timing were 4000 mg/L, 0.15 PV/a (Pore Volume [PV], m3), 1/2 of well spacing and 96% water cut in single slug of asphalt injection system, when the injection condition was multiple slug, the “high–low–high” slug combination mode was the best injection mode. These results could provide effective development basis for asphalt profile control after polymer flooding in thick oil layers.

scholarly journals Delayed Crosslinking Amphiphilic Polymer Gel System with Adjustable Gelation Time Based on Competitive Inclusion Method

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 381 ◽  
Author(s):  
Bin Xu ◽  
Huiming Zhang ◽  
He Bian
Keyword(s):  
Gelation Time ◽  
Salt Resistance ◽  
Amphiphilic Polymer ◽  
Polymer Gel ◽  
Polymer Backbone ◽  
Temperature Resistance ◽  
Inclusion Method ◽  
Profile Control ◽  
Resistance Performance ◽  
Gel System

Delayed crosslinking polymer gel systems are widely utilized in deep profile control processes for water production control in oilfields. In this paper, a kind of delayed crosslinking amphiphilic polymer gel system with adjustable gelation time based on competitive inclusion was prepared and its delayed crosslinking gelling properties were studied. The amphiphilic polymer of P(acrylamide (AM)–sodium acrylate (NaA)–N-dodecylacrylamide (DDAM)) was synthesized and it showed much better salt resistance, temperature resistance, and shear resistance performance compared with hydrolyzed polyacrylamide (HPAM). Phenol can be controlled released from the the cavity of β-cyclodextrin (β-CD) ring in the presence of the hydrophobic group used as the competitive inclusion agent in the amphiphilic polymer backbone. Accordingly, the gelation time of the delayed crosslinking amphiphilic polymer gel system is closely related to release rate of the crosslinker from the the cavity of β-CD ring. This study screened an amphiphilic polymer with good salt resistance and temperature resistance performance, which can be used in high temperature and high salinity reservoirs, and provided a feasible way to control the gelation time of the polymer gel system by the competitive inclusion method.

Numerical Simulation of the Buried Hill Reservoir in Bohai Bay

2013 ◽  
Vol 448-453 ◽  
pp. 4003-4008
Author(s):  
Kai Jun Tong ◽  
Yan Chun Su ◽  
Li Zhen Ge ◽  
Jian Bo Chen ◽  
Ling Ling Nie
Keyword(s):  
Numerical Simulation ◽  
History Matching ◽  
Numerical Models ◽  
Bohai Bay ◽  
Fractured Reservoir ◽  
Fracture Characterization ◽  
Oil Distribution ◽  
Remaining Oil ◽  
Remaining Oil Distribution ◽  
Buried Hill

Buried hill reservoir fracture description and reservoir simulation technology have been a hot research, but also is one of the key issues that restrict the efficient development of such reservoirs. Based on JZ buried hill reservoir which heterogeneity is strong, some wells water channeling fast and difficult to control the situation for fracture affect, a typical block of dual medium reservoir numerical models which was comprehensive variety of information, discrete fracture characterization and geological modeling is established. The fractured reservoir numerical model is simulated through Eclipse software to seek the law of remaining oil distribution. Through the reservoir geological reserves and production history matching, the remaining oil distribution of main production horizon is forecasted. On this basis, the results of different oilfield development adjustment programs are predicted by numerical simulation.

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