This study delved into the efficacy of enhanced oil production (EOP) within perforated horizontal... more This study delved into the efficacy of enhanced oil production (EOP) within perforated horizontal wellbores across diverse flow profiles. The authors implemented five distinct configurations, encompassing uniform radial air injection (profile 1) and variable radial air injection (profiles 2-5), with a particular emphasis on the concomitant production of liquid and air phases. Additionally, the study examined the frictional behavior along the perforated wellbore. Liquid production was demonstrably amplified throughout the bubble, plug, and slug flow regimes; however, a decline was observed in the stratified, stratified transition, and stratified wave flow regimes. Notably, the liquid product exhibited a direct correlation with both the mixture flow rate and its associated Reynolds number, signifying an increase with holdup and a decrease with void fraction. Conversely, air production displayed a positive association with a higher air flow rate. Overall, profiles 2 and 4 yielded the most favorable production during the bubble, plug, slug, and stratified flow regimes. In contrast, profile 3 emerged as the optimal configuration for the stratified transition and stratified wave flow regimes. The friction factor remained relatively constant with profile 1, experienced a reduction in profile 2, and exhibited an escalation in profile 3. Additionally, it increased in the middle of profile 4 and decreased at the center of the perforated section in profile 5. The friction factor behavior of profile 1 remained stable and smooth due to the invariant air flow rate throughout the perforated section. Conversely, some fluctuation was observed in profile 2 due to the inherent variability of the radial air injection along the perforated section. Importantly, the experimental and numerical results demonstrated satisfactory agreement across all flow patterns, with some minor discrepancies noted in the static pressure drop behavior during the bubble, dispersed bubble, and slug flow regimes.
With depletion of oil reserve around the world, focus has been shifted towards deeper exploration... more With depletion of oil reserve around the world, focus has been shifted towards deeper exploration in the field that is difficult to reach. Oil production rate is influenced by perforation density distribution's along horizontal wells, specifically in reservoirs with high permeability and low-pressure drawdown. This study investigated the behaviours of the total pressure drop, mixture’s superficial velocity, void fraction and liquid film thickness that occurs with various flow patterns (i.e., bubble, slug, stratified and stratified wave flows). Two perforation density conditions are studied, namely perforation density increase at outlet and perforation density increase at inlet. The friction factor was fulfilled through the perforated and unperforated horizontal wellbore. Production is greater with a perforated horizontal wellbore than with a smooth (unperforated) horizontal wellbore. The total pressure drop, mixture superficial velocity and void fraction increases with the air s...
Studying flow patterns that formed during the two phase flow is great importance in many industri... more Studying flow patterns that formed during the two phase flow is great importance in many industries, for example, the petroleum, chemical, nuclear and geothermal industries . Oil extraction operations is one of both offshore and onshore.Two-phase flow is part of a multiphase flow because it consists of two materials and classified as a homogeneous system, for example: as air-liquid, air-solid or as a heterogeneous system, for example: liquid-liquid and liquid-solid. It is considered to be an unsteady flow and it is more complex than single phase flow due to the difference between the material properties in each phase. Air-Liquid flow is a homogeneous flow but at the same time it is considered as an unsteady flow due to difference between the compounds of the material in each phase. It contains more than one phenomenon at the flow in vertical and horizontal pipes with 90° elbow depending on superficial velocity of air Usa and superficial velocity liquid Usl. The value of the density ...
This paper is provided a numerical simulation of flow patterns (bubble, slug/ Taylor bubble, chur... more This paper is provided a numerical simulation of flow patterns (bubble, slug/ Taylor bubble, churn/ stratified wave flow, annular) of air-water two phase flow. ANSYS FLUENT program with VOF homogenous model through unsteady state turbulent flow employed to study the effect of holdup, void fraction and liquid film thickness on the pressure drop through the vertical and horizontal pipes with the 90o elbow. K-ɛ (Realizable) model has been used in order to solve the turbulent flow with bubble and slug flow patterns; whereas (RNG) model with churn and annular flow patterns by depending on the values of viscosity and density of the flow mixture.
This study delved into the efficacy of enhanced oil production (EOP) within perforated horizontal... more This study delved into the efficacy of enhanced oil production (EOP) within perforated horizontal wellbores across diverse flow profiles. The authors implemented five distinct configurations, encompassing uniform radial air injection (profile 1) and variable radial air injection (profiles 2-5), with a particular emphasis on the concomitant production of liquid and air phases. Additionally, the study examined the frictional behavior along the perforated wellbore. Liquid production was demonstrably amplified throughout the bubble, plug, and slug flow regimes; however, a decline was observed in the stratified, stratified transition, and stratified wave flow regimes. Notably, the liquid product exhibited a direct correlation with both the mixture flow rate and its associated Reynolds number, signifying an increase with holdup and a decrease with void fraction. Conversely, air production displayed a positive association with a higher air flow rate. Overall, profiles 2 and 4 yielded the most favorable production during the bubble, plug, slug, and stratified flow regimes. In contrast, profile 3 emerged as the optimal configuration for the stratified transition and stratified wave flow regimes. The friction factor remained relatively constant with profile 1, experienced a reduction in profile 2, and exhibited an escalation in profile 3. Additionally, it increased in the middle of profile 4 and decreased at the center of the perforated section in profile 5. The friction factor behavior of profile 1 remained stable and smooth due to the invariant air flow rate throughout the perforated section. Conversely, some fluctuation was observed in profile 2 due to the inherent variability of the radial air injection along the perforated section. Importantly, the experimental and numerical results demonstrated satisfactory agreement across all flow patterns, with some minor discrepancies noted in the static pressure drop behavior during the bubble, dispersed bubble, and slug flow regimes.
With depletion of oil reserve around the world, focus has been shifted towards deeper exploration... more With depletion of oil reserve around the world, focus has been shifted towards deeper exploration in the field that is difficult to reach. Oil production rate is influenced by perforation density distribution's along horizontal wells, specifically in reservoirs with high permeability and low-pressure drawdown. This study investigated the behaviours of the total pressure drop, mixture’s superficial velocity, void fraction and liquid film thickness that occurs with various flow patterns (i.e., bubble, slug, stratified and stratified wave flows). Two perforation density conditions are studied, namely perforation density increase at outlet and perforation density increase at inlet. The friction factor was fulfilled through the perforated and unperforated horizontal wellbore. Production is greater with a perforated horizontal wellbore than with a smooth (unperforated) horizontal wellbore. The total pressure drop, mixture superficial velocity and void fraction increases with the air s...
Studying flow patterns that formed during the two phase flow is great importance in many industri... more Studying flow patterns that formed during the two phase flow is great importance in many industries, for example, the petroleum, chemical, nuclear and geothermal industries . Oil extraction operations is one of both offshore and onshore.Two-phase flow is part of a multiphase flow because it consists of two materials and classified as a homogeneous system, for example: as air-liquid, air-solid or as a heterogeneous system, for example: liquid-liquid and liquid-solid. It is considered to be an unsteady flow and it is more complex than single phase flow due to the difference between the material properties in each phase. Air-Liquid flow is a homogeneous flow but at the same time it is considered as an unsteady flow due to difference between the compounds of the material in each phase. It contains more than one phenomenon at the flow in vertical and horizontal pipes with 90° elbow depending on superficial velocity of air Usa and superficial velocity liquid Usl. The value of the density ...
This paper is provided a numerical simulation of flow patterns (bubble, slug/ Taylor bubble, chur... more This paper is provided a numerical simulation of flow patterns (bubble, slug/ Taylor bubble, churn/ stratified wave flow, annular) of air-water two phase flow. ANSYS FLUENT program with VOF homogenous model through unsteady state turbulent flow employed to study the effect of holdup, void fraction and liquid film thickness on the pressure drop through the vertical and horizontal pipes with the 90o elbow. K-ɛ (Realizable) model has been used in order to solve the turbulent flow with bubble and slug flow patterns; whereas (RNG) model with churn and annular flow patterns by depending on the values of viscosity and density of the flow mixture.
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