Horizontal Well Water Cut Estimation due to Water Coning in Heterogeneous Formations with Vertical Flow Barriers (Russian)

2016 ◽  
Author(s):  
D. A. Safin ◽  
A. P. Korobkin ◽  
A. N. Sitnikov
Keyword(s):  
Horizontal Well ◽  
Well Water ◽  
Vertical Flow ◽  
Water Coning ◽  
Heterogeneous Formations ◽  
Water Cut

Evaluating Water Coning Control for Horizontal Well in Bottom-Water Sandstone Reservoirs by Numerical Method

2012 ◽  
Vol 524-527 ◽  
pp. 292-296
Author(s):  
Rong Wang ◽  
Kui Zhang ◽  
Yong Gang Duan ◽  
Ting Kuan Cao
Keyword(s):  
Horizontal Well ◽  
Bottom Water ◽  
Negative Impact ◽  
Oil Production ◽  
High Water ◽  
Control Effect ◽  
Water Coning ◽  
Sandstone Reservoirs ◽  
High Water Cut Stage ◽  
Water Cut

Horizontal well is the main technology to develop bottom-water sandstone reservoirs. Water coning has a significant influence on development effect, and shut-in coning control is one of coning suppression methods. Based on the geological model of a given oilfield, this paper has made an evaluation of water coning control by numerical simulation. It can be concluded that the method of shut-in coning control is effective for low water cut wells. When shutting in, the lower the water cut is, the greater decline extent of water cut can be obtained and the higher cumulative oil production can be achieved after well reopening. The longer the close time is, the better water coning control effect can be acquired, however it will affect oil production undoubtly. When horizontal well enters into high water cut stage, shut-in coning control not only has almost no effect, but also has a negative impact on the normal oil production.

The Research for Delaying the Bottom Water Coning in Horizontal Wells Application Balance Screen Pipe

2013 ◽  
Vol 734-737 ◽  
pp. 1480-1483 ◽  
Author(s):  
Wu Yi Shan ◽  
Xue Zhang
Keyword(s):  
Pressure Distribution ◽  
Oil Recovery ◽  
Horizontal Well ◽  
Bottom Water ◽  
Horizontal Wells ◽  
Optimization Method ◽  
Well Water ◽  
Horizontal Section ◽  
Water Breakthrough ◽  
Water Coning

When horizontal wells are used to exploit reservoir with bottom water, oil wells water breakthrough prematurely due to water coning, water-free oil recovery is reduced. The reason of the formation of horizontal well water cone is analyzed. Then analysis of the mechanism using balanced screen pipe to inhibit bottom water coning in horizontal well is completed. According to the existing screen pipe size, screen configuration is optimized. Horizontal section pressure distribution is controlled by the balanced screen pipe, and then flow of horizontal well sections is adjusted. Bottom water coning speed of all well sections is controlled. An example is calculated by the software which established and the result shows that optimization method can improve water-free oil recovery.

Case Study on Polymer Gel to Control Water Coning for Horizontal Well in Offshore Oilfield

2011 ◽  
Author(s):  
Li Cai Dai ◽  
Qing You ◽  
Xie Yuhong ◽  
He Long ◽  
Cui Ya ◽  
...  
Keyword(s):  
Horizontal Well ◽  
Polymer Gel ◽  
Water Coning ◽  
Control Water

Production Well Water Coning-Is There Anything We Can Do?

2002 ◽  
Author(s):  
F.B. Thomas ◽  
E. Shtepani ◽  
G. Marosi ◽  
D.B. Bennion
Keyword(s):  
Well Water ◽  
Production Well ◽  
Water Coning

scholarly journals Comparison Between Homogenous and Heterogeneous Reservoirs: A Parametric Study of Water Coning Phenomena

2021 ◽  
Vol 5 (1) ◽  
pp. 119-131
Author(s):  
Frzan F. Ali ◽  
Maha R. Hamoudi ◽  
Akram H. Abdul Wahab
Keyword(s):  
Production Rate ◽  
Oil Production ◽  
Water Production ◽  
Effective Parameters ◽  
Radial Cross Section ◽  
Heterogeneous Reservoirs ◽  
Water Breakthrough ◽  
Water Coning ◽  
Water Cut ◽  
Reservoir Simulator

Water coning is the biggest production problem mechanism in Middle East oil fields, especially in the Kurdistan Region of Iraq. When water production starts to increase, the costs of operations increase. Water production from the coning phenomena results in a reduction in recovery factor from the reservoir. Understanding the key factors impacting this problem can lead to the implementation of efficient methods to prevent and mitigate water coning. The rate of success of any method relies mainly on the ability to identify the mechanism causing the water coning. This is because several reservoir parameters can affect water coning in both homogenous and heterogeneous reservoirs. The objective of this research is to identify the parameters contributing to water coning in both homogenous and heterogeneous reservoirs. A simulation model was created to demonstrate water coning in a single- vertical well in a radial cross-section model in a commercial reservoir simulator. The sensitivity analysis was conducted on a variety of properties separately for both homogenous and heterogeneous reservoirs. The results were categorized by time to water breakthrough, oil production rate and water oil ratio. The results of the simulation work led to a number of conclusions. Firstly, production rate, perforation interval thickness and perforation depth are the most effective parameters on water coning. Secondly, time of water breakthrough is not an adequate indicator on the economic performance of the well, as the water cut is also important. Thirdly, natural fractures have significant contribution on water coning, which leads to less oil production at the end of production time when compared to a conventional reservoir with similar properties.

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 Bulkhead Principle - Delaying Water Cut and Improving Horizontal Well Productivity through Compartmentalization Using Short Swellable Packers

2011 ◽  
Author(s):  
Peter Elliot Smith ◽  
Dustin A. Young ◽  
Noman Shahreyar ◽  
Jon Eric Lauritzen ◽  
Mohd Zaki Bin Awang
Keyword(s):  
Horizontal Well ◽  
Well Productivity ◽  
Water Cut
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