Research And Field Application Of Water Coning Control With Production Balanced Method In Bottom-Water Reservoir

2007 ◽  
Author(s):  
Xingwan Tu ◽  
Dragon L. Peng ◽  
Zhaohui Chen
Keyword(s):  
Bottom Water ◽  
Water Reservoir ◽  
Field Application ◽  
Water Coning

scholarly journals Prediction Method of Bottom Water Coning Profile and Water Breakthrough Time in Bottom Water Reservoir without Barrier

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Yahui Li ◽  
Haitao Li ◽  
Ying Li
Keyword(s):  
Bottom Water ◽  
Radial Flow ◽  
Water Reservoir ◽  
Prediction Method ◽  
Flow In Porous Media ◽  
Fluid Viscosity ◽  
Breakthrough Time ◽  
Water Breakthrough ◽  
Irreducible Water Saturation ◽  
Water Coning

During the exploitation of bottom water oil reservoir, bottom water coning influences the breakthrough of bottom water significantly. Because water cut rises quickly after the breakthrough of bottom water, measures should be taken before the breakthrough to postpone production period without water, thus improving oil recovery. So accurate prediction of water coning profile and breakthrough time is very essential. Through mathematical derivation, this paper proposed a prediction method of bottom water coning profile and bottom water breakthrough time in bottom water reservoir without barrier. Based on theory of fluids flow in porous media, this paper assumes that the flow models are plane radial flow in opened intervals and spherical radial flow in unopened intervals. Further, factors of fluid viscosity, irreducible water saturation, residual oil saturation, and oil-water contact (OWC) movement are also taken into account. Compared with other prediction equations, this method achieves more precise bottom water breakthrough time, and the relative deviation is only 1.14 percent.

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.

Research on Factors and Model of Water Production of Bottom Water Reservoir

2012 ◽  
Vol 594-597 ◽  
pp. 2590-2597
Author(s):  
Liang Zhang ◽  
Yi Zuo Shi ◽  
Chang Hui Yan ◽  
Xiao Xiong Wu ◽  
Pan Zhao ◽  
...  
Keyword(s):  
Bottom Water ◽  
Water Reservoir ◽  
Oil Field ◽  
Control Measures ◽  
High Yield ◽  
Oil Well ◽  
Water Production ◽  
Mode Water ◽  
Production Mode ◽  
Tahe Oil Field

In block one of Tahe oil field, the Triassic Lower Oil Formation sand with a low-amplitude anticline has a characteristic of bottom water reservoir and a uniform oil/water contact, bottom water is energetic, natural water drive, rock and fluid depletion drive. With the continuous development, oilfield has entered high water cut stage, bottom water coning is significant, oil well has rising of the water content and production decline. Summarized influencing factors of water production and water production mode in block one of Tahe oil field. According to water production factors of oil well, we draw four kinds of water production mode: water production mode of tectonic position, water production mode of poor fault-sealing prediction, water production mode of developed into inter-layers, water production mode of high specific inflow segments. Putting forward four kinds of water production mode provide a theoretical basis to control measures for high yield water of later oil well.

Stabilized Water-Cut in Carbonate Naturally-Fractured Reservoirs With Bottom Water With an Implication in Well Spacing Design for Recovery Optimization

2018 ◽  
Author(s):  
Samir Prasun ◽  
A. K. Wojtanowicz
Keyword(s):  
Final Stage ◽  
Bottom Water ◽  
Fractured Reservoirs ◽  
Capillary Forces ◽  
Naturally Fractured Reservoirs ◽  
Oil Displacement ◽  
Well Spacing ◽  
Constant Rate ◽  
Water Coning ◽  
Water Cut

Maximum stabilized water-cut (WC), also known as ultimate water-cut in a reservoir with bottom-water coning, provides important information to decide if reservoir development is economical. To date, theory and determination of stabilized water-cut consider only single-permeability systems so there is a need to extend this concept to Naturally Fractured Reservoirs (NFRs) in carbonate rocks — known for severe bottom water invasion. This work provides insight of the water coning mechanism in NFR and proposes an analytical method for computing stabilized water-cut and relating to well-spacing design. Simulated experiments on a variety of bottom-water hydrophobic NFRs have been designed, conducted, and analyzed using dual-porosity/dual-permeability (DPDP) commercial software. They show a pattern of water cut development in NFR comprising the early water breakthrough and very rapid increase followed by water cut-stabilization stage, and the final stage with progressive water-cut. The initial steply increase of water-cut corresponds to water invading the fractures. The stabilized WC production stage occurs when oil is displaced at a constant rate from matrix to the water-producing fractures. During this stage water invades matrix at small values of capillary forces so they do not oppose water invasion. In contrast, during the final stage (with progressing water cut) the capillary forces grow significantly so they effectively oppose water invasion resulting in progressive water cut. A simple analytical model explains the constant rate of oil displacement by considering the driving effect of gravity and viscous forces at a very small value of capillary pressure. The constant oil displacement effect is confirmed with a designed series of simulation experiments for a variety of bottom-water NFRs. Statistical analysis of the results correlates the duration of the stabilized WC stage with production rate and well-spacing and provides the basis for optimizing the recovery. Results show that stabilized water-cut stage does not significantly contribute to recovery, so the stage needs to be avoided. Proposed is a new method for finding the optimum well spacing that eliminates the stabilized WC stage while maximizing recovery. The method is demonstrated for the base-case NFR.

The Horizontal Well Production Technique with Thin Bedded Bottom Water Reservoir in Luliang Oil Field

2010 ◽  
Author(s):  
Jin Huo ◽  
Guoxin Shi ◽  
Jianguo Lu ◽  
Linxiang Sang ◽  
Jun Shi ◽  
...  
Keyword(s):  
Horizontal Well ◽  
Bottom Water ◽  
Water Reservoir ◽  
Oil Field ◽  
Production Technique ◽  
Well Production

Analysis Development Status of A12 Reservoir

2013 ◽  
Vol 650 ◽  
pp. 664-666
Author(s):  
Lei Zhang ◽  
Guo Ming Liu
Keyword(s):  
Water Distribution ◽  
Bottom Water ◽  
Oil And Gas ◽  
Water Reservoir ◽  
Gas Reservoirs ◽  
Gas Drive ◽  
Oil And Gas Reservoir ◽  
Water Gas ◽  
Oil Gas ◽  
Gas Bearing

A12 oil and gas reservoirs in L Oilfield Carboniferous carbonate rocks of oil and gas bearing system, saturated with the gas cap and edge water and bottom water reservoir. The A12 oil and gas reservoir structure the relief of the dome-shaped anticline, oil, gas and water distribution controlled by structure, the gas interface -2785 meters above sea level, the oil-water interface altitude range -2940 ~-2980m, average-2960m. Average reservoir thickness of 23m, with a certain amount of dissolved gas drive and gas cap gas drive energy, but not very active edge and bottom water, gas cap drive index.

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.

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