The Numerical Simulation of Buried Hill Fractured Reservoir by CO2 WAG with Overlap Alternative Horizontal Well Pattern

2012 ◽  
Vol 524-527 ◽  
pp. 1634-1638
Author(s):  
Ping Yue ◽  
Zhi Min Du ◽  
Xiao Fan Chen ◽  
Li Lu
Keyword(s):  
Numerical Simulation ◽  
Oil Recovery ◽  
Horizontal Well ◽  
Negative Impact ◽  
Global Climate ◽  
Carbon Capture And Storage ◽  
Fractured Reservoir ◽  
Permeability Model ◽  
Well Pattern ◽  
Buried Hill

For the trends of global climate warming, it is great important to implement the Carbon capture and storage (CCS) technology. This paper describes the numerical simulation of CO2 displacement enhanced oil recovery (EOR) in M reservoir. The M reservoir is an extra-thick buried hill fractured reservoir, which use overlap alternative horizontal well pattern to produce. Considering the time-varying effects of fracture’s porosity and permeability parameters, combining the develop dynamic and the diversification of physical property parameters of fractured formation, use the dual porosity dual permeability model and the three-dimensional components simulator to simulate the develop process. By CO2 WAG orthogonal experiment design, can simulate and predict the development effect of fractured buried hill reservoir affected by factors such as: different production and injection well pattern, injection intensity, gas water slug ratio, alternating cycle and so on. The results show that in the process of CO2 WAG can significantly reduce the risk of gas breakthrough by overlap alternative horizontal well pattern, and reduce the negative impact by fracture properties, also can improve EOR and CO2 sequestration effectively. On this basis, this paper evaluates the suitability of WAG development methods to fractured buried hill reservoir with overlap alternative horizontal well pattern, also optimizes the reasonable development plan for M reservoir.

scholarly journals Making the subsurface political: How enhanced oil recovery techniques reshaped the energy transition

2019 ◽  
Vol 38 (4) ◽  
pp. 733-750
Author(s):  
Sébastien Chailleux
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Carbon Capture ◽  
Oil And Gas ◽  
Global Climate ◽  
Carbon Capture And Storage ◽  
Energy Transition ◽  
Social Protest ◽  
Recovery Techniques ◽  
And Storage

Analyzing the case of France, this article aims to explain how the development of enhanced oil recovery techniques over the last decade contributed to politicizing the subsurface, that is putting underground resources at the center of social unrest and political debates. France faced a decline of its oil and gas activity in the 1990s, followed by a renewal with subsurface activity in the late 2000s using enhanced oil recovery techniques. An industrial demonstrator for carbon capture and storage was developed between 2010 and 2013 , while projects targeting unconventional oil and gas were pushed forward between 2008 and 2011 before eventually being canceled. We analyze how the credibility, legitimacy, and governance of those techniques were developed and how conflicts made the role of the subsurface for energy transition the target of political choices. The level of political and industrial support and social protest played a key role in building project legitimacy, while the types of narratives and their credibility determined the distinct trajectories of hydraulic fracturing and carbon capture and storage in France. The conflicts over enhanced oil recovery techniques are also explained through the critical assessment of the governance framework that tends to exclude civil society stakeholders. We suggest that these conflicts illustrated a new type of politicization of the subsurface by merging geostrategic concerns with social claims about governance, ecological demands about pollution, and linking local preoccupations to global climate change.

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.

Parameters Optimization of Stereoscopic Horizontal Well Patterns by Using Numerical Reservoir Simulation

2012 ◽  
Vol 433-440 ◽  
pp. 2602-2606
Author(s):  
Jun Lai Wu ◽  
Yue Tian Liu ◽  
Hai Ning Yang
Keyword(s):  
Reservoir Simulation ◽  
Horizontal Well ◽  
Simulation Method ◽  
Parameters Optimization ◽  
Water Flooding ◽  
Fracture Permeability ◽  
Numerical Reservoir Simulation ◽  
Well Pattern ◽  
Liaohe Oilfield ◽  
Buried Hill

Well pattern is the most important affecting factor to the ultimate recovery for an oilfield development. Many researches are reported on areal well pattern, which is widely used in conventional reservoirs development such as low permeability reservoirs, heavy oil reservoirs, multi-layer sandstone reservoirs, etc. In this paper, according to the geological characteristics of fractured buried hill reservoir of Liaohe Oilfield, we firstly present the concept of stereoscopic well patterns and compare it with common areal water flooding. By using numerical reservoir simulation method, we design and optimize the parameters of 5-spot stereoscopic horizontal well patterns, including payzone thickness and horizontal well length under different anisotropic factors of fracture permeability. This can be successfully applied on the development of MM block fractured buried hill reservoir of Liaohe Oilfield.

A Novel Method of Constructing Spatial Well Pattern for Water Flooding in Fractured-Vuggy Carbonate Reservoirs FVCRs

2021 ◽  
Author(s):  
Jing Wang ◽  
Tuozheng Zhang ◽  
Huiqing Liu ◽  
Xiaohu Dong ◽  
Xiaobo Li ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Oil Recovery ◽  
Gini Coefficient ◽  
Flow Resistance ◽  
Vertical Direction ◽  
Carbonate Reservoirs ◽  
Water Flooding ◽  
Equilibrium Displacement ◽  
Well Pattern ◽  
Vertical Location

Abstract Fractured-vuggy reservoir is significantly different from porous reservoirs. Ordovician reservoir in T Oilfield in China is the largest FVCR around the world. Water flooding has been applied as a prospective method in more than 140 units, but water channeling is especially serious and the recovery is only about 15%. In such reservoir, cavities and fractures are the main storage spaces and flow channels, respectively. Because the fractures and cavities are spatially non-stratified and discretized, the waterflood pattern differs significantly from that in sandstone or porous carbonate reservoirs. It is very essential to construct a spatial well pattern to match the distribution and connectivity of fractures and cavities, which is a very popular topic in recent years. In this work, we presented a multistage construction method of spatial well pattern combining reservoir engineering with numerical simulation methods. Firstly, the economic concepts of Lorenz curve and Gini coefficient were introduced to choose the injector from all wells to achieve equilibrium displacement of injected water in the plane. Secondly, displacement and drainage equilibrium index (DDEI) was presented to determine the vertical location of the injector to achieve equilibrium displacement and drainage in vertical direction. Thirdly, the vertical locations of the producers were determined based on the distribution of reserves in vertical direction. Fourthly, the local producers were further optimized based on the cavities along the wellbore by numerical simulation. Finally, this method was successfully used to construct the spatial well patterns of fractured-vuggy units with different karst features in A unit of T Oilfield. The results show that the oil recovery factor is inversely proportional to the Gini coefficient calculated with the combined variable of flow resistance and crude reserve rather than that calculated with flow resistance in pore reservoirs. The ratio of the reserve to formation factor, V/(kh), can be used to determine the vertical location of the injector. And the optimal DDEI which is the ratio of V/(kh) in upper reservoir of the wellbore to that in lower reservoir of the wellbore is equal to 1. The vertical locations of producers are related to the vertical distributions of reserve and cavities in different karst units. At last, the principles of constructing spatial well pattern in fractured-vuggy carbonate reservoirs were proposed. This work provides an innovative and effective method to establish a spatial well pattern for FVCRs, which will break new ground for efficient development of FVCRs by water flooding.

Numerical Simulation of Low-Permeability Fractured Reservoirs on Imbibition

2013 ◽  
Vol 712-715 ◽  
pp. 792-795 ◽  
Author(s):  
Yun Qiang Wu ◽  
Jing Song Li ◽  
Xin Hong Zhang ◽  
Jian Zhou ◽  
Tong Jing Liu
Keyword(s):  
Numerical Simulation ◽  
Oil Recovery ◽  
Capillary Force ◽  
Fractured Reservoirs ◽  
Channel Structure ◽  
Low Permeability ◽  
Dense Matrix ◽  
Fractured Reservoir ◽  
Capillary Suction ◽  
The Matrix

Low permeability fractured reservoir is a special reservoir with complex fracture distribution and dense matrix. Low permeability fractured reservoir always have small porosity, low pore pressure and permeability. Therefore, low permeability fractured reservoir has low oil recovery efficiency. Besides, the developing complex process and higher costs lead to lower economic benefit. Low permeability fractured reservoir production mechanisms in the fracture system mainly by the capillary force of water into the matrix. Therefore, the hydrophilic blocks of dense, self-priming effect of capillary water is the main mechanism of oil. In this study, numerical simulation, the establishment of a dual media model analysis showed that the capillary suction from the oil production rate and the final volume flow channel structure, the capillary force, viscosity of crude oil and other factors.

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