Optimization of Horizontal Well Placement for Cold Production in Extra-Heavy Oil Reservoir

2021 ◽  
pp. 587-600
Author(s):  
Xing-min Li
Keyword(s):  
Heavy Oil ◽  
Horizontal Well ◽  
Oil Reservoir ◽  
Well Placement ◽  
Heavy Oil Reservoir

Study on Heating Zone and Producing Zone of Cyclic Steam Stimulation with Horizontal Well in Heavy Oil Reservoir

2012 ◽  
Vol 594-597 ◽  
pp. 2438-2441 ◽  
Author(s):  
Shi Jun Huang ◽  
Ping Hu ◽  
Qiu Li
Keyword(s):  
Heavy Oil ◽  
Horizontal Well ◽  
Thermal Recovery ◽  
Oil Reservoir ◽  
Heating Zone ◽  
Oil Viscosity ◽  
Cyclic Steam Stimulation ◽  
Heavy Oil Reservoir ◽  
Critical Viscosity ◽  
Steam Stimulation

In this paper, employing reservoir simulation and mathematical analysis methods, considering typical heavy oil reservoir and fluid thermal properties, the heating and producing shape of thermal recovery with horizontal well for different heavy oil reservoirs including ordinary, extra and super heavy oil are investigated based on the modification of thermal recovery parameters of different viscosity. By introducing heating radius and producing radius and considering the coupling effect of temperature, pressure and oil saturation fields, a quantitative expression between heating radius/producing radius and oil viscosity, formation thickness is presented, so is the impact of oil viscosity on the heating radius. Results shows that for Cyclic Steam Stimulation, the producing radius of horizontal well is bigger than its heating radius for light oil, both of which, however, shrink with higher viscosity. Beyond a critical viscosity, where the heating radius equals to the producing radius, the heating radius of horizontal well would be bigger than its producing radius. More over, the critical viscosity shows tight relationship to the formation thickness.

scholarly journals MODELING THE DYNAMICS OF PRESSURE AND TEMPERATURE IN THE RESERVOIR WITH HEAVY OIL WHEN HEATED

2017 ◽  
Vol 22 (1-2) ◽  
pp. 62-68
Author(s):  
V. Sh. Shagapov ◽  
Y. A. Yumagulova ◽  
A. A. Gizzatullina
Keyword(s):  
Mathematical Model ◽  
Heavy Oil ◽  
Horizontal Well ◽  
Oil Reservoir ◽  
System Of Equations ◽  
Thermal Waves ◽  
Reduced Viscosity ◽  
Symmetric Formulation ◽  
Heavy Oil Reservoir ◽  
Selection Of

In radially symmetric formulation is built and investigated mathematical model of the problem of heated heavy oil reservoir by horizontal well and the possibility of further operation of the well for the selection of oil with reduced viscosity. The resulting system of equations reveals the dynamics of the process, to evaluate the characteristics of the distance of penetration of filtration and thermal waves over the period.

The Fuzzy Evaluation Based on Entropy Method for Heavy Oil Reservoir Horizontal Well CO2 Huff and Puff Well Selection

2014 ◽  
Vol 607 ◽  
pp. 886-893
Author(s):  
Ya Hui Li ◽  
Cai Zhen Peng
Keyword(s):  
Heavy Oil ◽  
Horizontal Well ◽  
Comprehensive Evaluation ◽  
Horizontal Wells ◽  
Fuzzy Comprehensive Evaluation ◽  
Indicator System ◽  
Entropy Method ◽  
Specific Method ◽  
Oil Reservoir ◽  
Heavy Oil Reservoir

Due to its high viscosity, it is very difficult to develop heavy oil cost-effectively. Currently, CO2 huff and puff method is a better choice to develop heavy oil reservoir. The key to this method is to choose the suitable candidate target wells. However, it is now very difficult to judge the suitability of the horizontal target wells’ heavy oil reservoirs’ CO2 huff and puff. In according to such issue, this paper, based on the entropy weight method of fuzzy comprehensive evaluation, and used the established horizontal wells’ index in heavy oil reservoir CO2 huff and puff, evaluates the suitability of candidate wells comprehensively. Moreover, this paper presents a set of indicator system that suits the choice of horizontal wells with regard to its heavy oil reservoir CO2 huff and puff, and proposes a specific method and procedures to evaluate an individual candidate well. This project uses such method to calculate 19 horizontal wells in area G, and the evaluation results are consistent with the actual situations. Therefore, it proves that such proposed evaluation method and evaluation index system are feasible to a certain extent. Keyword:heavy oil reservoir;horizontal well;CO2 huff and puff;Well selection; entropy method;Fuzzy comprehensive evaluation。

Characterization and Prediction of Gas Breakthrough With Cyclic Steam and Gas Stimulation Technique in an Offshore Heavy Oil Reservoir

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
Haijun Wu ◽  
Qingjun Du ◽  
Jian Hou ◽  
Jingsong Li ◽  
Ruxiang Gong ◽  
...  
Keyword(s):  
Regression Model ◽  
Simulation Study ◽  
Reservoir Simulation ◽  
Heavy Oil ◽  
Horizontal Well ◽  
Oil Reservoir ◽  
Calibration Curves ◽  
Heavy Oil Reservoir ◽  
Stimulation Technique

In this paper, a reservoir simulation study was conducted for the characterization and prediction of gas breakthrough during the development of cyclic steam and gas stimulation (CSGS) for a horizontal well. A new concept named the gas breakthrough coefficient (GBC) was proposed to characterize the gas breakthrough degree quantitatively, and a regression model and two calibration curves were established to predict the gas breakthrough degree. The method of foam plugging to inhibit gas breakthrough was also discussed. It was found that the gas breakthrough degree could be well characterized by the GBC and distinguished as four types: weak, moderate, strong, and severe. The regression model and calibration curves could also be used to predict the gas breakthrough degree under different reservoir and development conditions. Foam plugging was found to be effective to inhibit gas breakthrough when the gas breakthrough degree was moderate or strong.

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