scholarly journals PARAFFIN PROBLEM TREATING ALONG THE FLOWLINE (STUDY CASE: FROM WELLHEAD “X” TO THE SEPARATOR”)

SINERGI ◽  
2018 ◽  
Vol 22 (2) ◽  
pp. 120
Author(s):  
Herianto Herianto
Keyword(s):  
Fluid Flow ◽  
Crude Oil ◽  
Pour Point ◽  
Temperature Drop ◽  
Fluid Flow Rate ◽  
Oil Transportation ◽  
Specific Factors ◽  
Oil Characteristics ◽  
Study Case ◽  
Surface Production

Paraffin deposition becomes a problem in the crude oil transportation system in surface production facilities, especially in oilfield flowline. The cause is big pressure drop which can inhibit the fluid flow rate. Paraffin problem occurrence is affected by specific factors, such as crude oil characteristics, flowing pressure and oil temperature drop below the oil pour point. From the parameter mentioned before, the potential of experiencing paraffin deposition in the flowline from the wellhead to the separator needs to be analyzed. From the physical properties analysis, paraffin deposition occurs when the temperature is decreased below the oil pour point (43 OC). In this case, the wellhead temperature is 65 OC. Paraffin problem countermeasures are being done by installing insulation along the flowline to resolve the fluid heat loss. If the previous countermeasure method could not solve the problem, a sand heater is needed to be installed to heat up the fluid inside the flowline in a certain point of distance. 

scholarly journals KAJIAN LOADING-UNLOADING CRUDE OIL DARI PLATFORM KE FSO ABERKHA

2019 ◽  
Vol 9 (1) ◽  
pp. 54
Author(s):  
Zulfaidah Ariany
Keyword(s):  
Fluid Flow ◽  
Crude Oil ◽  
Flow Rate ◽  
Single Point ◽  
Oil Industry ◽  
Fluid Flow Rate ◽  
Safety Factors ◽  
Ship Building

FSO (Floating Storage & Offloading), is a floating / ship building that is used as a place to store crude oil. This crude oil is usually from FPS or FPU which is transferred to the FSO through a submerged turret loading (STL) system, then exported/offloaded to the tanker shelter through flexible hoses on the back of the FSO. The existence of FSO greatly benefits the oil industry, since it can be placed as close to the drilling area which is generally offshore. The method of loading ships that arrive can be done in various ways, including STS (ship to ship), Tandem (stern mooring), and SPM (single point mooring). A ship used to store oil is only referred to as a floating storage and offloading vessel (FSO). The results of the analysis show that the efficiency of pump usage has an effect on the fluid flow rate, it’s evident from the use of pumps to move crude oil in a pipeline resulting in an image with the highest stress value reaching 89 Pa at an efficiency value of 98%. criteria for safety factors that are allowed.

scholarly journals Comparison of pour point depressant (PPD) ethylene-vinyl acetate (EVA) and nano-montmorillonite

2021 ◽  
Vol 894 (1) ◽  
pp. 012019
Author(s):  
Z D Nurfajrin ◽  
B Satiyawira ◽  
R A Putra
Keyword(s):  
Crude Oil ◽  
Vinyl Acetate ◽  
Pour Point ◽  
Ethylene Vinyl Acetate ◽  
Oil Viscosity ◽  
Pour Point Depressant ◽  
Oil Transportation ◽  
Point Depressant ◽  
Wax Deposits ◽  
Wax Crystals

Abstract One of the problems with oil production is stuck of oil transportation flow in the pipeline caused by wax deposits. The high wax content in crude oil causes the oil viscosity value to increase so that crude oil has High Pour Point Oil (HPPO) properties. In this research, using crude oil sample with initial pour point of 31oC and viscosity of 556 cP. This samples are classified as heavy oil. Therefore, this sample is suitable for use as an experiment in this research. There are several methods to deal with HPPO. One chemical method used to overcome this problem is adding Pour Point Depressant (PPD) to crude oil. This PPD functions to decrease pour point value by binding wax crystals in crude oil. In this study, two types of PPD were compared, Ethylene-Vinyl Acetate (EVA) and Nano-Montmorillonite (Nano-MMT). Both can reduce the pour point value on crude oil, but PPD EVA shows a more excellent reduction than nano-MMT. The results show that EVA is better at binding crystals than nano-MMT. After the injection of 400 ppm EVA, the pour point value of crude oil could be decreased up to 24oC, and the viscosity also decreased by 185 cP.

Macromolecular Flow Improver Used for the Crude Oil Development

2020 ◽  
Vol 842 ◽  
pp. 285-289
Author(s):  
Fu Sheng Zhang ◽  
Da Long Shan ◽  
Xue Ning Li ◽  
Guo Liang Liu ◽  
Zhuo Yan Zhu
Keyword(s):  
Chemical Composition ◽  
Crude Oil ◽  
Pour Point ◽  
Simulation Experiment ◽  
Technical Requirement ◽  
Specific Flow ◽  
Oil Development ◽  
Oil Transportation ◽  
Flow Improver

To overcome the shear-resisting challenge encountered in crude oil transportation, this paper analyzed the chemical composition of the crude oil transported through the Xinjiang-exporting pipeline and the structure of wax contained in the oil. Then, on the basis of the aforementioned analysis, a shear-resisting agent that is able to significantly improve the shear-resisting performance of the pour point and viscosity of the crude oil beneficiated with flow improver, was developed. Moreover, a macromolecular flow improver was developed by mixing a specific flow improver with the shear-resisting agent according to optimized proportions. The simulation experiment indicates that with the proposed macromolecular flow improver, it is likely to satisfy the technical requirement of normal-temperature transportation of crude oil through the Xinjiang-exporting pipeline.

scholarly journals Process Simulation for Crude Oil Stabilization by Using Aspen Hysys

2020 ◽  
pp. 14-28
Author(s):  
Hussein Al- Ali
Keyword(s):  
Fluid Flow ◽  
Vapor Pressure ◽  
Crude Oil ◽  
Flow Rate ◽  
Water Flow Rate ◽  
Inlet Temperature ◽  
Fluid Temperature ◽  
Fluid Flow Rate ◽  
Aspen Hysys ◽  
True Vapor

A light fluid from different reservoir formation started recently to associate the production of the crude oil stabilization plant which is unfortunately not enough to release off all light components and as a results the true vapor pressure increased in the storage tanks more than 12 psi. From the results in Aspen Hysys, it was found that manipulating of working parameters for the existing plant likewise the inlet temperature, dry fluid flow rate, water flow rate and the temperature of the outlet fluid from Fired heater have no great effect on the true vapor pressure (TVP). The TVP at normal feed conditions of 50.5 C and for the plant with third and fourth stages are 14.96 Kg/Cm2. a and 10.23 Kg/Cm2. a, respectively. It was found that for the third stage, the changing in feed flow rates for both dry and water have no effect on the reducing TVP, while to stabilized the TVP for the exported crude oil within range of (68947.6 – 82737.1) Pa/(10 – 12) psia when the the fourth separator used in the process plant, the feed dry fluid flow rate (26.4 – 105.6) KBD, the minimum base sediment and water cut in the feed stream 4 Vol%, the inlet fluid temperature (43-51.5)⁰C and the differential temperature across the fired heater in range of (16-24)⁰C with feed temperature range (40-55)⁰C.

Application of Cross-correlation Analysis Method for Measurement of the Fluid Flow Rate Based on X-ray Radiation

2019 ◽  
Vol 11 (1) ◽  
pp. 01025-1-01025-5 ◽  
Author(s):  
N. A. Borodulya ◽  
◽  
R. O. Rezaev ◽  
S. G. Chistyakov ◽  
E. I. Smirnova ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Correlation Analysis ◽  
Flow Rate ◽  
Cross Correlation ◽  
Fluid Flow Rate ◽  
Analysis Method ◽  
X Ray ◽  
Cross Correlation Analysis ◽  
Correlation Analysis Method

Effect of Pour Point Depressants on the Impedance Spectroscopy of Waxy Crude Oil

2020 ◽  
Vol 35 (1) ◽  
pp. 433-443
Author(s):  
Hongying Li ◽  
Chaohui Chen ◽  
Qian Huang ◽  
Yifei Ding ◽  
Yu Zhuang ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Crude Oil ◽  
Pour Point ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Pour Point Depressants

Wax Content of Crude Oil: A Function of Kinematic Viscosity and Pour Point

2015 ◽  
Vol 33 (4) ◽  
pp. 381-387 ◽  
Author(s):  
A. Majhi ◽  
Y. K. Sharma ◽  
V. S. Kukreti ◽  
K. P. Bhatt ◽  
R. Khanna
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Kinematic Viscosity ◽  
Wax Content
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