The Experts below are selected from a list of 15 Experts worldwide ranked by ideXlab platform
Bamidele, Oyewole Yusuf - One of the best experts on this subject based on the ideXlab platform.
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Risk identification and risk management in pumping of gel fluids in pipeline applications
University of Stavanger Norway, 2011Co-Authors: Bamidele, Oyewole YusufAbstract:The focus of this research work is to develop a model that will predict the pressure required to move a crosslinked gel plug in a pipeline in the hypothetical case of Halliburton Temblok 50 gel. In addition, this study seeks to carry out risk analysis on the experimental set up and procedure by using JSA and risk acceptance criteria to identify what can go wrong. This study adopts a simplified theoretical model which was initially developed from Fanning Equation in order to get pressure drops range which was used in setting the PSV on 2, 4 and 6 inches pipeline. In addition, an experiment was conducted in both Halliburton and IRIS test yard by pushing 50m, 100m and 150m gel plug into 2 inches pipeline at different times. Water was then pumped into the line until the gel plug started moving and pressure recorded. The experiment was repeated for the 4 and 6 inches pipelines and their pressures recorded. The experiment was carried out based on two assumptions. First, that the flow rate, and the settling times are constant. Second, that the pipelines were smooth and that the topography in which these lines were laid was straight. The theoretical and experimental results were then compared and graph of pressure drops against pipe diameters were plotted for 50m, 100m and 150m gel plug. From these graphs, a linear Equation containing pipe diameter and gel plug length as input parameter was developed. The result in this study points to a model which can be used in predicting the pressure required to set Temblok 50 gel in motion provided the gel plug length and the pipe diameter are known
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Risk identification and risk management in pumping of gel fluids in pipeline applications
University of Stavanger Norway, 2011Co-Authors: Bamidele, Oyewole YusufAbstract:Master's thesis in Risk managementThe focus of this research work is to develop a model that will predict the pressure required to move a crosslinked gel plug in a pipeline in the hypothetical case of Halliburton Temblok 50 gel. In addition, this study seeks to carry out risk analysis on the experimental set up and procedure by using JSA and risk acceptance criteria to identify what can go wrong. This study adopts a simplified theoretical model which was initially developed from Fanning Equation in order to get pressure drops range which was used in setting the PSV on 2, 4 and 6 inches pipeline. In addition, an experiment was conducted in both Halliburton and IRIS test yard by pushing 50m, 100m and 150m gel plug into 2 inches pipeline at different times. Water was then pumped into the line until the gel plug started moving and pressure recorded. The experiment was repeated for the 4 and 6 inches pipelines and their pressures recorded. The experiment was carried out based on two assumptions. First, that the flow rate, and the settling times are constant. Second, that the pipelines were smooth and that the topography in which these lines were laid was straight. The theoretical and experimental results were then compared and graph of pressure drops against pipe diameters were plotted for 50m, 100m and 150m gel plug. From these graphs, a linear Equation containing pipe diameter and gel plug length as input parameter was developed. The result in this study points to a model which can be used in predicting the pressure required to set Temblok 50 gel in motion provided the gel plug length and the pipe diameter are known
Wentao Ji - One of the best experts on this subject based on the ideXlab platform.
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summary and evaluation on single phase heat transfer enhancement techniques of liquid laminar and turbulent pipe flow
International Journal of Heat and Mass Transfer, 2015Co-Authors: Wentao Ji, Anthony M Jacobi, Yaling HeAbstract:Abstract A comprehensive literature survey on the thermal–hydraulic performance of liquid flow and heat transfer in pipes with internal integral-fins, twisted tape inserts, corrugations, dimples, and compound enhancement techniques is conducted in this paper. The results of recent published papers with the developments of each technology are also included. It is found that for turbulent heat transfer the enhancement ratio of experimental Nusselt number over Dittus–Boelter Equation for internal integral-finned tube is generally in the range of 2–4; twisted tape insert is 1.5–6; corrugated tube is 1.5–4 and dimpled tube is 1.5–4, including the compound enhancement techniques. The ratio of experimental friction factor over Fanning Equation is mostly in the range of 1–4 for tubes with internal integral-fins, 2–13 for inserted twisted tape, 2–6 for corrugated tube and 3–5 for dimpled tube. The internally-finned tubes yield the best thermal–hydraulic performance compared with the other three types of tube, whose heat transfer rate augmentation over plain tube is more than the increase of friction factor at the same flow rate. For most of the corrugated and dimpled tubes, the heat transfer enhancement ratios are larger than the increment of pressure drop penalties. For the twisted tape inserts, the pressure drop is remarkably increased at the turbulent flow, and most of data have lower efficiency than the other three types of tube, while it is found to be effective in laminar and transition flow and higher viscosity fluid.
Yaling He - One of the best experts on this subject based on the ideXlab platform.
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summary and evaluation on single phase heat transfer enhancement techniques of liquid laminar and turbulent pipe flow
International Journal of Heat and Mass Transfer, 2015Co-Authors: Wentao Ji, Anthony M Jacobi, Yaling HeAbstract:Abstract A comprehensive literature survey on the thermal–hydraulic performance of liquid flow and heat transfer in pipes with internal integral-fins, twisted tape inserts, corrugations, dimples, and compound enhancement techniques is conducted in this paper. The results of recent published papers with the developments of each technology are also included. It is found that for turbulent heat transfer the enhancement ratio of experimental Nusselt number over Dittus–Boelter Equation for internal integral-finned tube is generally in the range of 2–4; twisted tape insert is 1.5–6; corrugated tube is 1.5–4 and dimpled tube is 1.5–4, including the compound enhancement techniques. The ratio of experimental friction factor over Fanning Equation is mostly in the range of 1–4 for tubes with internal integral-fins, 2–13 for inserted twisted tape, 2–6 for corrugated tube and 3–5 for dimpled tube. The internally-finned tubes yield the best thermal–hydraulic performance compared with the other three types of tube, whose heat transfer rate augmentation over plain tube is more than the increase of friction factor at the same flow rate. For most of the corrugated and dimpled tubes, the heat transfer enhancement ratios are larger than the increment of pressure drop penalties. For the twisted tape inserts, the pressure drop is remarkably increased at the turbulent flow, and most of data have lower efficiency than the other three types of tube, while it is found to be effective in laminar and transition flow and higher viscosity fluid.
Abdillah, Arfiq Isa - One of the best experts on this subject based on the ideXlab platform.
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Optimisasi Peningkatan Produksi Minyak Pada CO2 Flooding-Enhanced Oil Recovery
2018Co-Authors: Abdillah, Arfiq IsaAbstract:Produksi minyak menggunakan beberapa tahap, yakni tahap primer, tahap sekunder, dan tahap tersier. Tahap tersier untuk meningkatkan produksi minyak atau biasa disebut enhanced oil recovery (EOR). EOR dilakukan dengan melakukan injeksi material atau energi dari luar sumur. Terdapat beberapa metode EOR yang telah dikembangkan dan diterapkan pada lapangan sumur minyak yakni metode thermal, miscible/solvent, dan chemical. Salah satu metode solvent adalah dengan menginjeksikan karbon dioksida (CO2) pada reservoir. CO2 EOR memiliki kemampuan untuk meningkatkan produksi 5-15%. Selain itu, dengan menginjeksikan CO2 ke dalam reservoir akan memiliki dampak yang baik untuk mengurangi efek rumah kaca. Namun untuk mendapatkan hasil yang optimal untuk CO2 EOR diperlukan beberapa parameter yang harus dioptimisasi seperti laju aliran massa, tekanan dan temperatur injeksi. Untuk membuat model penurunan tekanan pada CO2 EOR digunakan berberapa persamaan antara lain persamaan Fanning untuk model pada injection well, persamaan Darcy untuk model pada reservoir dan persamaan Beggs-brill untuk model pada production well. Berdasarkan hasil optimisasi menggunakan Genetic Algorithm (GA) didapatkan kenaikan keuntungan sebesar 45.14%, dari 25339.13 USD/hari menjadi 36777.93 USD/hari. ========== Oil production have several stage i.e. primary, secondary and tertiary. In tertiary stage, the effort to increase oil production is called as enhanced oil recovery (EOR). EOR is performed by injecting material or energy from outside reservoir. There are several EOR methods that have been developed and implemented in the oil field, including thermal recovery, chemical flooding, and solvent flooding. One of solvent flooding is CO2 EOR by injecting CO2 to reservoir. CO2 EOR method has capability to increase 5-15% oil recovery. In addition, injecting CO2 to reservoir have good impact to reduce green house effect. However, to obtain the optimum result of CO2 EOR needs several parameter to be optimized, such as mass flow rate, pressure and temperature of injection. There are several Equation that h ave been used to build a model of CO2EOR pressure losses . There are Fanning Equation for injection well, Darcy Equation for reservoir formation and Beggs-Brill Equation for production well. The optimization of CO2 EOR using Genetic Algorithm (GA) provide increasing the net profit. 45.14%, from 25339.13 USD/day to 36777.93 USD/da
Anthony M Jacobi - One of the best experts on this subject based on the ideXlab platform.
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summary and evaluation on single phase heat transfer enhancement techniques of liquid laminar and turbulent pipe flow
International Journal of Heat and Mass Transfer, 2015Co-Authors: Wentao Ji, Anthony M Jacobi, Yaling HeAbstract:Abstract A comprehensive literature survey on the thermal–hydraulic performance of liquid flow and heat transfer in pipes with internal integral-fins, twisted tape inserts, corrugations, dimples, and compound enhancement techniques is conducted in this paper. The results of recent published papers with the developments of each technology are also included. It is found that for turbulent heat transfer the enhancement ratio of experimental Nusselt number over Dittus–Boelter Equation for internal integral-finned tube is generally in the range of 2–4; twisted tape insert is 1.5–6; corrugated tube is 1.5–4 and dimpled tube is 1.5–4, including the compound enhancement techniques. The ratio of experimental friction factor over Fanning Equation is mostly in the range of 1–4 for tubes with internal integral-fins, 2–13 for inserted twisted tape, 2–6 for corrugated tube and 3–5 for dimpled tube. The internally-finned tubes yield the best thermal–hydraulic performance compared with the other three types of tube, whose heat transfer rate augmentation over plain tube is more than the increase of friction factor at the same flow rate. For most of the corrugated and dimpled tubes, the heat transfer enhancement ratios are larger than the increment of pressure drop penalties. For the twisted tape inserts, the pressure drop is remarkably increased at the turbulent flow, and most of data have lower efficiency than the other three types of tube, while it is found to be effective in laminar and transition flow and higher viscosity fluid.
