Study on Fluid Solid Coupling of Horizontal Wells in Bottom Water Sandstone Reservoir

2013 ◽  
Vol 827 ◽  
pp. 239-243
Author(s):  
Jia Ming Zhang ◽  
Xiao Dong Wu ◽  
Zhuang Zhang ◽  
Han Han Zhang ◽  
Jia Zhang ◽  
...  
Keyword(s):  
Bottom Water ◽  
Water Reservoir ◽  
Coupled Model ◽  
Horizontal Wells ◽  
Well Completion ◽  
Reservoir Flow ◽  
Wellbore Pressure ◽  
Methodological Errors ◽  
The Laplace Transform ◽  
Sandstone Reservoir

In the development of bottom water sandstone reservoir, the utilization of horizontal wells is economical and reliable but also can delay the bottom water coning and it has the advantages over the conventional vertical wells .The methods adopted in the past have methodological errors. This paper regards the reservoir flow and wellbore flow of horizontal well as a interactional system which considers the fluid friction, momentum change, the mixed interference of wellbore wall inflows and other complex factors and obtains Laplace space solution by using the Laplace transform to establish the coupled model of wellbore pressure drop calculation. It can provide more advanced means for reservoir engineering studies, well completion and production engineering design of horizontal wells on the conditions of bottom water reservoir.

A Semi-Analytical Model Based on the Volumetric Source Method to Predict Acid Injection Profiles of Horizontal Wells in Carbonate Reservoirs

2020 ◽  
Vol 143 (5) ◽  
Author(s):  
Yongsheng Tan ◽  
Qi Li ◽  
Haitao Li ◽  
Xiang Zhou ◽  
Beibei Jiang
Keyword(s):  
Point Source ◽  
Analytical Model ◽  
Coupled Model ◽  
Horizontal Wells ◽  
Carbonate Reservoirs ◽  
Injection Time ◽  
Permeability Heterogeneity ◽  
Source Method ◽  
Acid Injection ◽  
Wellbore Pressure

Abstract Acid treatment is an important measure to improve production for horizontal wells of carbonate reservoirs. Acid injection profile of horizontal wells (AIPHWs) is the most critical indicator of the success of the acidification. Currently, most previous works studied AIPHW based on the point source method. However, an inherent singularity exists in the point source solution, and hence, the calculation speed is too slow or the solution does not converge. To solve this problem, a semi-analytical model (coupling the wellbore flow model and reservoir seepage model) by the volumetric source method is presented to determine AIPHW in carbonate reservoirs. In this new coupled model, the permeability heterogeneity, formation contamination, acid-induced wormhole formation, and wellbore pressure drop are all considered. The results of the validations show that the results from the proposed method match well with the model results from the literature. Then, the effects of the acid injection flowrate, acid injection time, and permeability heterogeneity on the AIPHW are studied. According to the sensitivity analysis, we find that the disequilibrium degree of AIPHW becomes stronger as acid injection flowrate increases, acid injection time increases, and permeability heterogeneity coefficient increases. This study provides a guide for the design of horizontal well acidification and the evaluation of acid treatments of horizontal wells in carbonate reservoirs.

A Semi-Analytical Model for Predicting Horizontal Well Performances in Fractured Gas Reservoirs With Bottom-Water and Different Fracture Intensities

2018 ◽  
Vol 140 (10) ◽  
Author(s):  
Yongsheng Tan ◽  
Haitao Li ◽  
Xiang Zhou ◽  
Beibei Jiang ◽  
Yongqing Wang ◽  
...  
Keyword(s):  
Porous Medium ◽  
Horizontal Well ◽  
Bottom Water ◽  
Flow Model ◽  
Numerical Solutions ◽  
Gas Reservoirs ◽  
Gas Reservoir ◽  
New Model ◽  
Well Completion ◽  
Wellbore Pressure

Numerical simulation and prediction studies on horizontal well performances in gas reservoir are foundation for optimizing horizontal well completion process. To gain more understanding on this theory, a steady-state reservoir model coupling with wellbore is developed in the fractured gas reservoirs with bottom-water and different fracture intensities to predict the horizontal well performances. Based on the equivalent flow assumption, the fractured porous medium is transformed into anisotropic porous medium so that the gas reservoir flow model can be developed as a new model that incorporates formation permeability heterogeneity, reservoir anisotropy, and gas reservoir damage. The wellbore flow model which considers pressure drops in the tubing is applied. We compare this paper model solutions for inflow profile along the well to the numerical solutions obtained from a commercial simulator (ECLIPSE 2011), and the result shows a very good agreement. Moreover, sensitive analysis, in terms of various linear densities of fractures, matrix permeability, fracture width, and wellbore pressure drop, is implemented. The results show that the new model developed in this study can obtain a more practical representation to simulate the horizontal wells performance in fractured gas reservoir with different fracture intensities and bottom-water, thus can be used to optimize the parameters in horizontal well completion of fractured gas reservoirs with different fracture intensities and bottom-water.

scholarly journals Horizontal Well Completion with Multiple Artificial Bottom Holes Improves Production Performance in Bottom Water Reservoir

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Haidong Wang ◽  
Yikun Liu
Keyword(s):  
Pressure Distribution ◽  
Horizontal Well ◽  
Bottom Water ◽  
New Technology ◽  
Water Reservoir ◽  
Pressure Profile ◽  
Production Performance ◽  
Well Completion ◽  
Horizontal Wellbore ◽  
Control Technologies

The horizontal well completion with stinger is usually used to control the bottom water cone. Although the pressure profile and the inflow profile along the horizontal wellbore can be divided into two parts by the stinger, these profiles have not really flattened. In order to flatten the pressure distribution and inflow distribution further, it proposes a new technology. This new horizontal well has multiple artificial bottom holes (MABH) along the wellbore and it has application potential. In order to verify the effectiveness of MABH technology, a model of horizontal well completion with MABH was established, and the production performance of different water cone control technologies was analyzed: conventional horizontal well, stinger completion horizontal well, and MABH completion horizontal well. The results show that the MABH technology has more advantages than the stinger technology. The uniformity of pressure distribution of the 6-MABH horizontal well is 55% higher than that of the horizontal well with string technology, and the uniformity of inflow distribution is increased by 65.25%. At the same time, although the operation of MABH technology is very simple, it should follow a rule of MABH installation: the position of the first MABH should be set at 242.5 m from the heel hole of the horizontal wellbore, and the other interval is 92.4 m.

scholarly journals Water Breakthrough Shape Description of Horizontal Wells in Bottom-Water Reservoir

2014 ◽  
Vol 2014 ◽  
pp. 1-9
Author(s):  
Shijun Huang ◽  
Baoquan Zeng ◽  
Fenglan Zhao ◽  
Linsong Cheng ◽  
Baojian Du
Keyword(s):  
Physical Model ◽  
Horizontal Well ◽  
Bottom Water ◽  
Water Reservoir ◽  
Horizontal Wells ◽  
Analysis Model ◽  
Heterogeneous Reservoir ◽  
Water Breakthrough ◽  
Original Oil In Place ◽  
Water Cut

Horizontal wells have been applied in bottom-water reservoir since their advantages were found on distribution of linear dropdown near wellbore, higher critical production, and more OOIP (original oil in place) controlled. In the paper, one 3D visible physical model of horizontal physical model is designed and built to simulate the water cresting process during the horizontal well producing and find water breakthrough point in homogenous and heterogeneous reservoir with bottom water. Water cresting shape and water cut of horizontal well in between homogenous and heterogeneous reservoir are compared on the base of experiment’s result. The water cresting pattern of horizontal well in homogeneous reservoir can be summarized as “central breakthrough, lateral expansion, thorough flooding, and then flank uplifting.” Furthermore, a simple analysis model of horizontal well in bottom water reservoir is established and water breakthrough point is analyzed. It can be drawn from the analysis result that whether or not to consider the top and bottom border, breakthrough would be located in the middle of horizontal segment with equal flow velocity distribution.

scholarly journals Study on Water Ridge Variation of Horizontal Wells in Bottom Water Reservoir

2020 ◽  
Vol 08 (10) ◽  
pp. 43-54
Author(s):  
Xiujuan Zhao ◽  
Mo Zhang ◽  
Quanlin Wang ◽  
Jie Tan ◽  
Bo Li
Keyword(s):  
Bottom Water ◽  
Water Reservoir ◽  
Horizontal Wells

Delineation of Sandstone Reservoir Flow Zones in the Central Bredasdorp Basin, South Africa, Using Core Samples

2021 ◽  
Author(s):  
Mimonitu Opuwari ◽  
Moses Magoba ◽  
Nehemiah Dominick ◽  
Nicolas Waldmann
Keyword(s):  
South Africa ◽  
Core Samples ◽  
Reservoir Flow ◽  
Sandstone Reservoir

scholarly journals Study on oil displacement efficiency of offshore sandstone reservoir with big bottom water

2021 ◽  
Author(s):  
Jie Tan ◽  
Ying-xian Liu ◽  
Yan-lai Li ◽  
Chun-yan Liu ◽  
Song-ru Mou
Keyword(s):  
Bottom Water ◽  
High Water ◽  
Displacement Efficiency ◽  
Oil Displacement ◽  
Oil Displacement Efficiency ◽  
Sandstone Reservoir ◽  
Sandstone Reservoirs ◽  
High Water Cut Stage ◽  
High Water Cut ◽  
Water Cut

AbstractX oilfield is a typical sandstone reservoir with big bottom water in the Bohai Sea. The viscosity of crude oil ranges from 30 to 425 cp. Single sand development with the horizontal well is adopted. At present, the water content is as high as 96%. The water cut of the production well is stable for a long time in the high water cut period. The recoverable reserves calculated by conventional methods have gradually increased, and even the partial recovery has exceeded the predicted recovery rate. This study carried out an oil displacement efficiency experiment under big water drive multiple to accurately understand an extensive bottom water reservoir's production law in an ultra-high water cut stage. It comprehensively used the scanning electron microscope date, casting thin section, oil displacement experiment, and production performance to analyze the change law of physical properties and relative permeability curve from the aspects of reservoir clay minerals, median particle size, pore distribution, and pore throat characteristics. Therefore, the development law of horizontal production wells in sandstone reservoirs with big bottom water is understood. It evaluates the ultimate recovery of sandstone reservoirs with big bottom water. It provides a fundamental theoretical basis and guidance for dynamic prediction and delicate potential tapping of sandstone reservoirs with big bottom water at a high water cut stage.

A transient flow model for multilateral horizontal wells in bottom water drive reservoirs

2020 ◽  
Vol 24 (1) ◽  
pp. 1
Author(s):  
Ping Yue ◽  
Chunqiu Guo ◽  
Xiaofan Cheng ◽  
Liandong Tang
Keyword(s):  
Bottom Water ◽  
Flow Model ◽  
Transient Flow ◽  
Horizontal Wells
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