Gas Liquid Separators Quantifying Separation Performance Part 3 SPE MEB (original) (raw)
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Gas/Liquids Separators: Quantifying Separation Performance - Part 2
Oil and Gas Facilities, 2013
I n this second article of a three-part series, methods for improved quantification of operating performances of the gas gravity separation, the mist extraction, and the liquid gravity separation sections of gas/liquid separators are discussed. These methods can be used for the selection and design of new separators, as well as the rating of existing separators. Part 1 of the series in August provided a general discussion of separation equipment classification, as well as existing limitations to methods used for quantifying separator performance. The main parts of a typical gas/liquid separator, vertical or horizontal, are shown in Fig. 1, including the feed pipe, inlet device, gas gravity separation section, mist extractor, and the liquid gravity separation section. Part 1 discussed the feed pipe and inlet device.
Gas/Liquids Separators-Part 2 Quantifying Separation Performance
I n this second article of a three-part series, methods for improved quantification of operating performances of the gas gravity separation, the mist extraction, and the liquid gravity separation sections of gas/liquid separators are discussed. These methods can be used for the selection and design of new separators, as well as the rating of existing separators. Part 1 of the series in August provided a general discussion of separation equipment classification, as well as existing limitations to methods used for quantifying separator performance. The main parts of a typical gas/liquid separator, vertical or horizontal, are shown in Fig. 1, including the feed pipe, inlet device, gas gravity separation section, mist extractor, and the liquid gravity separation section. Part 1 discussed the feed pipe and inlet device.
Separator vessels are commonly used in refinery, petrochemical plants, or gas processing plants to separate the vapor-liquid mixtures, and three phase mixtures, these vessel may be called knockout drums, accumulators, flash drums, vapor/liquid separators, reflux drums, or three-phase separators. The performance is determined by the characteristics of the fluid being separated, the size of the vessel and the type of internals installed. This guideline will provide a review of the important parameters in separator vessel sizing and selection.
A Novel Approach to Obtaining the Optimum Pressure and Stages of Separators
Iranian Journal of Oil and Gas Science and Technology, 2020
Nowadays, the increasing demand for energy in the world is one of the main concerns for energy supply. In fact, the required energy can be obtained by increasing the production rate of fossil fuels such as oil and natural gas. However, improving the efficiency of the equipment and facilities might have a significant impact on production from hydrocarbon resources. With respect to this subject, the optimization of separation facilities will be a simple and economic choice to increase the amount of the liquid obtained from production units all over the world. One of the parameters which have a noticeable effect on the yield of the production units is the separator pressure. Also, there are other factors such as heptane plus fraction properties, well head pressure, and ambient temperature which can change the optimum separator conditions. In this study, the influence of crude oil properties on the number of stages and pressure of each separator is investigated. The result shows that th...
Development of Model and Simulation of a Two-Phase, Gas-Liquid Horizontal Separator
In recent years, the performance requirements for petroleum process plants have become increasingly difficult to satisfy. In order to understand, design and operate the complex systems in the petroleum industries at relatively low cost and with minimum risk, mathematical modelling becomes very useful. Thus, this paper proposes some developed mathematical models for a two-phase gas-liquid horizontal separator, which is valid with an accuracy of about 1.641% based on the liquid temperature values. Simulated temperature values were 300.24 K, 299.69 K and 299.14 K with the corresponding industrial values as 300.22 K, 299.67 K and 299.11 K respectively. Within the boundaries of the limitations stated, the model could be used to predict the operation of the separator at different operating conditions, to optimize the separator products and as a tool for further expansion amongst other uses.
SPE production & operations, 2019
In this work, the performance of two pilot-scale separators was investigated using computational-fluid-dynamics (CFD) simulation with one operating at low gas volumetric quality comprising a bucket-and-weir configuration, and the other operated at high gas volumetric quality with a weir configuration. The pilot-scale separators were selected for this work because of their availability and the lack of data on industrial separators. The effects of the liquid (oil and water) flow rate and weir height on separation performance have been investigated for the separator operating at low gas volumetric quality. For this separator, the design of experiments (DOE) and a preliminary run of the separator were used to select the number of experiments and simulations to conduct and the levels (values) of the three variables investigated. For the second separator, the effects of the inlet flow rate on separation performance have been investigated. Eulerian and volume-of-fluid (VOF) multiphase-flow models in ANSYSV R Fluent (Fluent 2019), combined with a k-e turbulence model, were used to simulate the fluid-flow pattern and phase behavior inside each of the separators. The numerical solutions were initialized with a water level set at 50% of the weir height using a patching tool. A mesh-independence test was carried out to ensure that the results are not dependent on the mesh quality. The separation efficiencies from both models were compared with that from the experimental data. The results indicated that the two multiphase models, namely, Eulerian and VOF, predict the experimental results within 30% error. However, different separation performances were obtained for the same flow conditions. For the separator operating at low gas volumetric quality, the results from the Eulerian multiphase model produced a maximum deviation of 8%, while results from the VOF multiphase model produced a maximum deviation of 23% of the experimental data. For this separator, the oil flow rate was found to have the greatest effect on the separation efficiency. This is followed by the water flow rate and weir height. For the separator operating at high gas volumetric quality, a maximum percentage error of 30% for the Eulerian model and 21% for the VOF was obtained.
Validation of the Molar Flow Rates of Oil and Gas in Three-Phase Separators Using Aspen Hysys
2021
A three-phase separator is the first vessel encountered by well fluids. The application of separators has been of great value to the oil and gas industry. In order to generate the gas phase envelope that is applicable to the study of reservoir fluid and the selection of optimum operating conditions of separators, this research utilizes a specified reservoir fluid stream to simulate a three-phase separator executed in Aspen HYSYS. Subsequently, a comparative study of the effects of specified inlet operating conditions on the output of gas and oil streams was carried out. The results show that changing the inlet pressure of the separator from 1000 to 8000 kPa reduces the gas outlet flow from 1213 to 908.6 kg mol/h, while it increases the liquid flow rate from 374 to 838.0 kg mole/h. By changing the temperature of the separator feed stream from 13 to 83 °C, the gas outlet stream was raised from 707.4 to 1111 kg mol/h, while the liquid flow rate dropped from 1037.0 to 646.1 kg mol/h. It...