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Sekhars Correlation between Oil Production Rate and Gas-Lift Rate

Inactive Publication Date: 2006-12-07
VENKATARAMANAN CHANDRASEKHAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Many hydrocarbon well completions do not have sufficient reservoir energy (pressure) to lift the column of hydrocarbon fluid (oil) entirely to the surface.
This reservoir energy may be insufficient in the initial stages or in the later stages during the life of the producing well completion.
Not only are these modeling tools expensive but also it is expensive to capture the well completion and hydrocarbon characteristics usually required by these tools.

Method used

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  • Sekhars Correlation between Oil Production Rate and Gas-Lift Rate
  • Sekhars Correlation between Oil Production Rate and Gas-Lift Rate
  • Sekhars Correlation between Oil Production Rate and Gas-Lift Rate

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Embodiment Construction

[0004] The invention is an equation that describes the non-linear relation between the rate of oil production from a well completion and rate of gas-lift applied to the well completion. This equation is defined as,

Qoil=A*(1−e−B*(gl−C))−D*gl  (Equation 1)

[0005] Where, [0006] Qoil represents the rate of oil production and could be in any unit of measure that represents the rate of oil production, e.g., it could have dimensions of Lliquid3 / T, [0007] gl represents the rate of gas-lift and could be in any unit of measure that represents the rate of gas lift, e.g., it could have dimensions of Lgas3 / T, [0008] e is the natural log base, [0009] A represents a non-linear regression parameter, [0010] B represents a non-linear regression parameter, [0011] C represents a non-linear regression parameter, [0012] D represents a non-linear regression parameter.

[0013] Furthermore, [0014] T denotes the unit of measure of time, [0015] Lliquid3 denotes any unit of measure of liquid volume, [0016] Lga...

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Abstract

The relationship between the rate of oil production from a well completion and the rate of gas-lift applied to the well completion can be described through a non-linear equation that uses four regression parameters.

Description

FIELD OF INVENTION [0001] The invention relates to the Oil and Gas Industry. SUMMARY OF INVENTION [0002] The invention is an equation that describes in unambiguous terms the relation between the rate of oil production from a well completion and the rate of gas-lift applied to the well completion. BACKGROUND OF INVENTION [0003] Many hydrocarbon well completions do not have sufficient reservoir energy (pressure) to lift the column of hydrocarbon fluid (oil) entirely to the surface. This reservoir energy may be insufficient in the initial stages or in the later stages during the life of the producing well completion. When the reservoir energy is insufficient to lift the oil to the surface or when the desired rate of oil production is greater than the rate of oil production that can be achieved purely through the reservoir energy, then it becomes necessary to install artificial lift systems to maximize recovery and profitability. One such lift system, is the gas lift system, which uses ...

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Application Information

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IPC IPC(8): E21B47/00
CPCE21B43/122E21B47/00
Inventor VENKATARAMANAN, CHANDRASEKHAR
Owner VENKATARAMANAN CHANDRASEKHAR