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SPECIFIC PROPERTIES OF HORIZONTAL WELLBORE AND THE OPTIMAL ANALYSIS ON THE PERFORATION DENSITY

Sheng Zhou

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Abstract

A model of fluid flow in a horizontal wellbore is presented with consideration of the effect of reservoir inflow. The model is resolved numerically under the given boundary conditions. Pressure distribution and influx along horizontal wellbore are obtained. The equations of pressure profile and specific productivity index(PI) profile and perforation distributation along the horizontal section with a constant inflow profile are derived. Taking a well with given oil production and horizontal section length as an example, the pressure drawdown is calculated with the equations. The oil production can not raise continuously with the length increase of horizontal wellbore section because of common occurrence of pressure drop.

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A model of fluid flow in a horizontal wellbore is presented with consideration of the effect of reservoir inflow. The model is resolved numerically under the given boundary conditions. Pressure distribution and influx along horizontal wellbore are obtained. The equations of pressure profile and specific productivity index(PI) profile and perforation distributation along the horizontal section with a constant inflow profile are derived. Taking a well with given oil production and horizontal section length as an example, the pressure drawdown is calculated with the equations. The oil production can not raise continuously with the length increase of horizontal wellbore section because of common occurrence of pressure drop.

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Available abstract

A model of fluid flow in a horizontal wellbore is presented with consideration of the effect of reservoir inflow. The model is resolved numerically under the given boundary conditions. Pressure distribution and influx along horizontal wellbore are obtained. The equations of pressure profile and specific productivity index(PI) profile and perforation distributation along the horizontal section with a constant inflow profile are derived. Taking a well with given oil production and horizontal section length as an example, the pressure drawdown is calculated with the equations. The oil production can not raise continuously with the length increase of horizontal wellbore section because of common occurrence of pressure drop.

Key concepts: Wellbore, Inflow, Geology, Mechanics, Pressure drop, Perforation, Flow (mathematics), Constant (computer programming)

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