Bottom Water Energy Control to Enhance Oil Recovery in Bottom-Water Reservoir: Calculation Method for Artificial-Interlayer Shape of Bottom-Water Reservoir

2009 ◽  
Author(s):  
Yi-Kun Liu ◽  
Fu-Lin Wang ◽  
Xiao-Cong Wang ◽  
Hua-wen ◽  
Tao-yang
Keyword(s):  
Oil Recovery ◽  
Calculation Method ◽  
Bottom Water ◽  
Water Reservoir ◽  
Energy Control ◽  
Enhance Oil Recovery

Reservoir and Wellbore Flow Coupling Model for Fishbone Multilateral Wells in Bottom Water Drive Reservoirs

2021 ◽  
pp. 1-27
Author(s):  
ping Yue ◽  
Jiantang Zhou ◽  
Li Xia Kang ◽  
Ping Liu ◽  
Jia Chunsheng ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Bottom Water ◽  
Water Reservoir ◽  
Pressure Profile ◽  
Coupling Model ◽  
New Model ◽  
Flow Coupling ◽  
Field Situation ◽  
Production Wells ◽  
Actual Field

Abstract Nowadays, different types of complex production wells are applied in challenging reservoirs in order to maximize oil recovery. A representative application is the fishbone multilateral horizontal wells, which have advantages of expanding the drainage area information and reducing the pressure loss in the long single lateral wellbore. This paper investigated the performance of fishbone wells and derived a wellbore and reservoir flow coupling model for fishbone multilateral wells in the bottom water reservoirs. The new model considered plenty of parameters that may have significant impacts on productivity and pressure drop in the well, including the fishbone structure, the main and branch wellbores' length, the spacing distance of the branch wellbores, wellbore radius, and preformation parameters. Furthermore, a sensitivity analysis example by the numerical method presented in this paper. Compared with other models, our coupling model, when it is degraded to horizontal well, is more consistent with the results of actual field situation. In another comparative analysis, the results of the new model with branches show a good match with the numerical simulation results by software. The proposed method in this paper can be used as a valuable tool to analyze the productivity, wellbore inflow profile, and pressure profile of the fishbone multilateral wells in the bottom water reservoir.

A New Model for Evaluation of Horizontal Well in Bottom Water Reservoirs

2013 ◽  
Vol 411-414 ◽  
pp. 486-491
Author(s):  
Yue Dong Yao ◽  
Yun Ting Li ◽  
Yuan Gang Wang ◽  
Ze Min Ji
Keyword(s):  
Oil Recovery ◽  
Field Data ◽  
Horizontal Well ◽  
Bottom Water ◽  
Interaction Analysis ◽  
Evaluation Model ◽  
Water Reservoir ◽  
Well Performance ◽  
Water Reservoirs ◽  
Actual Field

It is the aim of this research to describe the horizontal well performance in different conditions, this paper firstly introduces 13 dimensionless variables to describe the influence factors of horizontal well performance in bottom water reservoir and calculates the range of all the variations from low to high level by making a statistics of the actual field data of the 23 horizontal wells, then establishes the oil recovery model with response surface method using a 3 level-13 variables Box-Behnken design (BBD) . Based on the evaluation model, single factor sensitivity and interaction analysis between any two factors are carried out. Finally, research on horizontal well in typical bottom water reservoirs indicates that the values calculated by the new evaluation model fit the actual field data, which proves that the evaluation model can provide criteria for the design or optimization of horizontal well development in a bottom water reservoir.

The Study on Oil Recovery of Matrix System in Fractured Bottom-Water Oil Reservoirs

2013 ◽  
Vol 295-298 ◽  
pp. 3232-3236
Author(s):  
Guo Qing Feng ◽  
Yang Zhao
Keyword(s):  
Oil Recovery ◽  
Bottom Water ◽  
Material Balance ◽  
Water Reservoir ◽  
Oil Reservoirs ◽  
Balance Theory ◽  
Fracture System ◽  
Matrix System ◽  
Matrix Porosity

Fracture and matrix porosity are two porosity systems in fractured bottom-water reservoir. Knowing the oil recovery in matrix system provides guidance for the later development of the reservoir. Using material balance theory, and combining with Leverett function, oil recovery of matrix and fracture system are calculated respectively, and the ultimate oil recovery of matrix system is predicted.

Systematic Evaluation on Horizontal well Performance in Bottom Water Reservoir

2013 ◽  
Vol 411-414 ◽  
pp. 3129-3133 ◽  
Author(s):  
Yun Ting Li ◽  
Yue Dong Yao ◽  
Tao Peng ◽  
Dan Sang ◽  
Xiang Chun Wang
Keyword(s):  
Oil Recovery ◽  
Horizontal Well ◽  
Bottom Water ◽  
Water Reservoir ◽  
Systematic Evaluation ◽  
Research Trend ◽  
Well Performance ◽  
Key Factors ◽  
Water Breakthrough ◽  
Calculation Results

Development of bottom water reservoir with horizontal well can effectively slow down water coning and avoid early water breakthrough in oil wells, which promotes the extensive application of horizontal well in bottom water reservoir. In this paper, literatures about horizontal well are investigated, and the latest research trend is summarized. All factors such as reservoirs, fluid property and production mode to influence horizontal well performance in bottom water reservoir are systematically studied by using reservoir numerical simulation. Based on the calculation results of reservoir parameters of the pilot area, comprehensive analysis to the key factors which affecting horizontal well performance is carried out and the influence degree of various factors on oil recovery is obtained. In a word, the research results in this paper can provide criteria for the design or optimization of horizontal well development in bottom water reservoir.

Immiscible CO2-Assisted Gravity Drainage Process for Enhancing Oil Recovery in Bottom Water Drive reservoir

2020 ◽  
Vol 27 (2) ◽  
pp. 60-66
Author(s):  
Dahlia A. Al-Obaidi ◽  
Mohammed S. Al-Jawad
Keyword(s):  
Oil Recovery ◽  
Bottom Water ◽  
Physical Models ◽  
Recovery Factor ◽  
Gravity Drainage ◽  
Ambient Conditions ◽  
Water Contact ◽  
3D Simulation Model ◽  
Water Cut ◽  
Enhance Oil Recovery

The CO2-Assisted Gravity Drainage process (GAGD) has been introduced to become one of the mostinfluential process to enhance oil recovery (EOR) methods in both secondary and tertiary recovery through immiscibleand miscible mode. Its advantages came from the ability of this process to provide gravity-stable oil displacement forenhancing oil recovery. Vertical injectors for CO2 gas have been placed at the crest of the pay zone to form a gas capwhich drain the oil towards the horizontal producing oil wells located above the oil-water-contact. The advantage ofhorizontal well is to provide big drainage area and small pressure drawdown due to the long penetration. Manysimulation and physical models of CO2-AGD process have been implemented at reservoir and ambient conditions tostudy the effect of this method to improve oil recovery and to examine the most parameters that control the CO2-AGDprocess. The CO2-AGD process has been developed and tested to increase oil recovery in reservoirs with bottom waterdrive and strong water coning tendencies. In this study, a scaled prototype 3D simulation model with bottom waterdrive was used for CO2-assisted gravity drainage. The CO2-AGD process performance was studied. Also the effects ofbottom water drive on the performance of immiscible CO2 assisted gravity drainage (enhanced oil recovery and watercut) was investigated. Four different statements scenarios through CO2-AGD process were implemented. Resultsrevealed that: ultimate oil recovery factor increases considerably when implemented CO2-AGD process (from 13.5%to 84.3%). Recovery factor rises with increasing the activity of bottom water drive (from 77.5% to 84.3%). Also,GAGD process provides better reservoir pressure maintenance to keep water cut near 0% limit until gas flood frontreaches the production well if the aquifer is active, and stays near 0% limit at all prediction period for limited waterdrive.

A Quick Evaluation Model for Horizontal Well Development in Bottom Water Reservoir

2011 ◽  
Vol 347-353 ◽  
pp. 398-402
Author(s):  
Yuan Gang Wang ◽  
Yue Dong Yao ◽  
Ming Jiang ◽  
Ze Min Ji
Keyword(s):  
Correction Factor ◽  
Oil Recovery ◽  
Horizontal Well ◽  
Bottom Water ◽  
Evaluation Model ◽  
Water Reservoir ◽  
Recoverable Reserves ◽  
Well Development ◽  
Heterogeneity Correction ◽  
Water Cut

The evaluation model for horizontal well development has significant potential in recoverable reserves uncertainty studies. This paper firstly establishes an evaluation model on the degree of reserve recovery at different level of water cut, and then makes a chart of the dimensionless aspect seepage ratio against the degree of reserve recovery at different level of water cut. Secondly, introduces heterogeneity correction factor and saturation correction factor to improve the oil recovery model. Finally, the oil recovery of 6 reservoirs with horizontal well development in Dagang Oil Company indicates that the prediction of the evaluation model is agreement with the actual data, and the model can provide criteria for horizontal well development in a bottom water reservoir.

Sign in / Sign up

Export Citation Format

Share Document