scholarly journals Impact of Fluid Properties on Electric Submersible Pumps (ESP) Performance and Run Life in a Well

2021 ◽  
Vol 25 (2) ◽  
pp. 139-143
Author(s):  
A. Joseph ◽  
A.O. Adeoti
Keyword(s):  
High Water ◽  
Early Failure ◽  
Pump Speed ◽  
Fluid Properties ◽  
Short Run ◽  
Intake Pressure ◽  
High Water Cut ◽  
Water Cut ◽  
The Impact

The primary goal of every operator is to optimally recover reserves at minimal operating costs. Unfortunately, due to inherent primary drive mechanisms that may not be strong enough and poorly designed completion jewelries that increases the complexity of well configurations, most reservoir are not efficiently depleted. This study investigates the impact of fluid properties on electric submersible pumps (ESP) performance and run life in a well. It was observed that the pump speed increases with increase in API gravities and vice-versa. However, decrease in pump speed was observed with crudes having high API gravity from wells with high water-cut (HBSW). High water-cut increases the viscosity of the crude and thus decreases the pump speed. The pump speed also increased as the GOR increases, howbeit, decreased as the GOR exceeds a certain optimum value due to cavitation. The pump intake pressure and the production rate were also investigated. The higher the intake pressure, the higher the pump speed and thus, the higher the  production. Well specific models for real-time ESP performance prediction were also developed for each property against the pumpspeed and they exhibited cubic relationships. It was also observed that the quality of the crude significantly affects the performance of ESP’s and therefore, must be checked to prevent early failure and short run life. Keywords: Electric submersible pumps, Fluid properties, Run life, Performance, Failure rate

scholarly journals Optimization of shut-in time before drilling for each strata system in the drilling pass area in Block G

2021 ◽  
Vol 233 ◽  
pp. 01035
Author(s):  
Lijun Huang
Keyword(s):  
Pressure Change ◽  
High Water ◽  
Production Level ◽  
Management Model ◽  
Bottom Hole ◽  
Stop Time ◽  
Stable Production ◽  
High Water Cut ◽  
Water Cut ◽  
The Impact

After the A oilfield enters the ultra-high water cut period, the production level is high, the comprehensive water cut is high and the production level is high. In recent years, the number of new wells has increased considerably, affecting the increase in production year by year. Faced with these two contradictions, a new scientific and effective drilling gateway management model has been explored to reduce the impact of drilling gateways on production. This will have a very important guarantee for the realization of A oilfield's continued stable production. Based on the research and practice of the drill-off area in Block G, this paper determines the minimum injection stop time before drilling-off corresponding to each set of formations according to the bottom hole pressure change law of the injection-stop well.

scholarly journals New Technologies to Improve the Performance of High Water Cut Wells Equipped With ESP

2021 ◽  
Author(s):  
Sudad H Al-Obaidi ◽  
Smirnov VI ◽  
Khalaf FH
Keyword(s):  
New Technologies ◽  
Produced Water ◽  
Low Cost ◽  
High Water ◽  
Oil Wells ◽  
Simultaneous Injection ◽  
High Water Cut ◽  
Water Cut

The article deals with theoretical and practical issues of improving the efficiency of operation of high-water cut oil wells by developing and applying double-acting pumping systems based on electric submersible pumps. This combination is providing down-hole gravitational separation of oil and produced water, lifting low-water-cut oil to the surface with simultaneous injection of most of the separated water into the absorbing formation without lifting to the surface. Moreover, it is providing low-cost regulation of the ratio of the volumes of the lifted product and the injected water, as well as monitoring the quality of the injected water with the required frequency.

Experimental Study of Reasonable Drawdown Pressure of Horizontal Wells in Oil Reservoir With Bottom Water

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Chuan Lu ◽  
Huiqing Liu ◽  
Qiang Zheng ◽  
Qingbang Meng
Keyword(s):  
Bottom Water ◽  
Physical Simulation ◽  
Horizontal Wells ◽  
High Water ◽  
Small Scale ◽  
Oil Reservoir ◽  
High Water Cut Stage ◽  
High Water Cut ◽  
Water Cut ◽  
The Impact

For the development of oil reservoir with bottom water, it is significant to analyze the impact of drawdown pressures on post water breakthrough performance of horizontal wells. Based on a small-scale and discretized physical simulation system, the impact of different drawdown pressures and the influence of changing drawdown pressures in different water cut stage have been discussed. The results show that for thin oil with relatively high viscosity (87.8 mPa.s), keeping a relatively large drawdown pressure in medium and low water cut stage is reasonable. But enlarging drawdown pressure in high water cut stage is harmful to increase ultimate oil recovery. For oil with further lower viscosity (21.4 mPa.s), adopting a small drawdown pressure and increasing it in medium and high water cut stage is reasonable. For the heavy oil (124.1 mPa.s), it is acceptable to enlarge drawdown pressure under the condition of low water cut period.

Preventing Proppant and Formation-Sand Production in High Water Cut, Heavy-Oil Wells: A Field Study from Argentina

2009 ◽  
Author(s):  
Daniel Daparo ◽  
Luis Soliz ◽  
Eduardo Roberto Perez ◽  
Carlos Iver Vidal Saravia ◽  
Philip Duke Nguyen ◽  
...  
Keyword(s):  
Field Study ◽  
Heavy Oil ◽  
High Water ◽  
Oil Wells ◽  
Sand Production ◽  
High Water Cut ◽  
Water Cut

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.

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