Compatibility Evaluation of BZ25-1 Crude Oils in Bohai Bay, China

2007 ◽  
Author(s):  
Jiaqiang Jing ◽  
Hongbin Niu ◽  
Lingbin Pan ◽  
Xiaoqin Xiong ◽  
Liwen Tan
Keyword(s):  
Crude Oil ◽  
Flow Behavior ◽  
Single Point ◽  
Production Optimization ◽  
Crude Oils ◽  
Bohai Bay ◽  
Major Objective ◽  
Offshore Production ◽  
Oil Mixtures ◽  
North Latitude

BZ25-1 oilfield is located in the southeast of Bohai bay which geographically lies between 119°00′ to 119°15′ east longitude and 38°10′ to 38°20′ north latitude. It has two oil blocks, including Shahejie (SHJ) waxy oil and Minghuazhen (MHZ) heavy oil, with six wellhead platforms WHPA∼WHPF and six submarine pipelines. Therein, the WHPC-WHPB and WHPB-SPM (Single Point Mooring) pipelines transport the mixture of the two produced crude oils. However, the mixing of the two oils will certainly bring out a change in their components and properties, which directly affects the safe operation of the submarine pipelines and offshore production facilities. Therefore, this paper compounds three kinds of MHZ/SHJ mixed oils with blending ratios of 1:1, 3:1 and 9:1, mainly studies how the components, rheological and thermophysical properties of the oil mixtures change with the blending ratio. The major objective of this study is to evaluate the compatibility of the two crude oils and provide a theoretical basis for the production optimization and risk elusion of the oilfield. The results of the study show that the components and properties of SHJ crude oil are quite different from those of MHZ oil, the flow behavior of SHJ oil is more sensitive to temperature. As MHZ oil in the compounds increases, the contents of asphaltene, resin, sulfur and carbon residue will increase except wax contents, their viscosities, densities and flash points will also increase, but their pour points, yield stresses, calorific values and other major thermophysical parameters will decrease. A blending ratio of 2∼7:1 for MHZ to SHJ crude oil can be concluded to make the properties of the compounds meet the safe and economic requirements of the subsea pipeline and offshore facility operations and ensure the compatibility of the mixed oils. In actuality, the field operations have confirmed that the recommended blending ratio is reasonable and practicable.

scholarly journals Influence of Heavy Organics Composition on Wax Properties and Flow Behavior of Waxy Crude Oils

2019 ◽  
pp. 1-12
Author(s):  
W. I. Eke ◽  
O. Achugasim ◽  
S. E. Ofordile ◽  
J. A. Ajienka ◽  
O. Akaranta
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Flow Behavior ◽  
Carbon Number ◽  
Resin Content ◽  
Crude Oils ◽  
Distribution Data ◽  
Waxy Crude ◽  
Wax Content ◽  
And Behavior

Paraffinic crude oils are desirable because of their high content of saturated hydrocarbons but may present handling challenges due to crystallization of high molecular weight paraffin at low temperatures. The prediction of wax properties and behavior of waxy crude oil is important in order to adopt appropriate mitigative measures to forestall flow assurance problems associated with wax crystallization and deposition. Accurate predictive models are limited mainly by the sheer complexity of crude oil composition. Result of analysis of saturates, aromatics, resins and asphaltene content of crude oils (SARA) has been used as a simple tool to predict and interpret crude oil properties and behavior but has been found inadequate in predicting wax instability. In this paper, we report on the use of SARA analysis and paraffin distribution data to interpret the wax properties and flow behavior of Niger-Delta crude oils. The crude oil properties determined include wax content, asphaltene and resin content by gravimetry, pour point, wax appearance temperature by cross-polarized microscopy and paraffin carbon number distribution of whole oil and wax precipitate by GC-FID. Asphaltene and resin content were found to influence the oil pour point, while saturates content, paraffin carbon number of crystallizing waxes and wax content control its low-temperature flow properties.

Study of the Effect of Crude Oils on the Metallic Corrosion

2018 ◽  
Vol 5 (1) ◽  
pp. 43-54
Author(s):  
Suresh Aluvihara ◽  
Jagath K Premachandra
Keyword(s):  
Crude Oil ◽  
Sulfur Content ◽  
Salt Content ◽  
Ferrous Metal ◽  
Relative Weight ◽  
Oil Refining ◽  
Crude Oils ◽  
Hardness Tester ◽  
Corrosion Rates ◽  
Ferrous Metals

Corrosion is a severe matter regarding the most of metal using industries such as the crude oil refining. The formation of the oxides, sulfides or hydroxides on the surface of metal due to the chemical reaction between metals and surrounding is the corrosion that  highly depended on the corrosive properties of crude oil as well as the chemical composition of ferrous metals since it was expected to investigate the effect of Murban and Das blend crude oils on the rate of corrosion of seven different ferrous metals which are used in the crude oil refining industry and investigate the change in hardness of metals. The sulfur content, acidity and salt content of each crude oil were determined. A series of similar pieces of seven different types of ferrous metals were immersed in each crude oil separately and their rates of corrosion were determined by using their relative weight loss after 15, 30 and 45 days. The corroded metal surfaces were observed under the microscope. The hardness of each metal piece was tested before the immersion in crude oil and after the corrosion with the aid of Vicker’s hardness tester. The metallic concentrations of each crude oil sample were tested using atomic absorption spectroscopy (AAS). The Das blend crude oil contained higher sulfur content and acidity than Murban crude oil. Carbon steel metal pieces showed the highest corrosion rates whereas the stainless steel metal pieces showed the least corrosion rates in both crude oils since that found significant Fe and Cu concentrations from some of crude oil samples. The mild steel and the Monel showed relatively intermediate corrosion rates compared to the other types of ferrous metal pieces in both crude oils. There was a slight decrease in the initial hardness of all the ferrous metal pieces due to corrosion.

scholarly journals Evaluation of the Different Compatibility Indices to Model and Predict Oil Colloidal Stability and Its Relation to Crude Oil Desalting

Resources ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 75
Author(s):  
Ivelina K. Shishkova ◽  
Dicho S. Stratiev ◽  
Mariana P. Tavlieva ◽  
Rosen K. Dinkov ◽  
Dobromir Yordanov ◽  
...  
Keyword(s):  
Crude Oil ◽  
Colloidal Stability ◽  
Crude Oils ◽  
Oil Blend ◽  
Light Medium

Thirty crude oils, belonging to light, medium, heavy, and extra heavy, light sulfur, and high sulfur have been characterized and compatibility indices defined. Nine crude oil compatibility indices have been employed to evaluate the compatibility of crude blends from the thirty individual crude oils. Intercriteria analysis revealed the relations between the different compatibility indices, and the different petroleum properties. Tetra-plot was employed to model crude blend compatibility. The ratio of solubility blending number to insolubility number was found to best describe the desalting efficiency, and therefore could be considered as the compatible index that best models the crude oil blend compatibility. Density of crude oil and the n-heptane dilution test seem to be sufficient to model, and predict the compatibility of crude blends.

scholarly journals Determination of the vaporization order of crude oils through the chemical analysis of crude oil residues burned on water

Chemosphere ◽  
2021 ◽  
pp. 131563
Author(s):  
Laurens van Gelderen ◽  
Kristoffer Gulmark Poulsen ◽  
Jan H. Christensen ◽  
Grunde Jomaas
Keyword(s):  
Chemical Analysis ◽  
Crude Oil ◽  
Crude Oils

Microwave monitoring of water in crude oil mixtures in the K-band. Part 1. Initial investigation

The Analyst ◽  
1984 ◽  
Vol 109 (6) ◽  
pp. 769 ◽  
Author(s):  
John F. Alder ◽  
Ian M. Clegg ◽  
Peter K. P. Drew
Keyword(s):  
Crude Oil ◽  
Initial Investigation ◽  
Oil Mixtures ◽  
K Band

COMPLEX PERMITTIVITY OF CRUDE OILS AND SOLUTIONS OF HEAVY CRUDE OIL FRACTIONS

1998 ◽  
Vol 19 (1) ◽  
pp. 93-126 ◽  
Author(s):  
Trond Friisø ◽  
Yannick Schildberg ◽  
Odile Rambeau ◽  
Tore Tjomsland ◽  
Harald Førdedal ◽  
...  
Keyword(s):  
Crude Oil ◽  
Complex Permittivity ◽  
Crude Oils ◽  
Heavy Crude Oil ◽  
Oil Fractions ◽  
Heavy Crude ◽  
Crude Oil Fractions

Chemometric differentiation of crude oil families in the southern Dongying Depression, Bohai Bay Basin, China

2019 ◽  
Vol 127 ◽  
pp. 37-49 ◽  
Author(s):  
Zhao-Wen Zhan ◽  
Xiao-Hui Lin ◽  
Yan-Rong Zou ◽  
Zheng Li ◽  
Dayang Wang ◽  
...  
Keyword(s):  
Crude Oil ◽  
Bohai Bay ◽  
Bohai Bay Basin ◽  
Dongying Depression

scholarly journals Comparing Crude Oils with Different API Gravities on a Molecular Level Using Mass Spectrometric Analysis. Part 1: Whole Crude Oil

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2766 ◽  
Author(s):  
Jandyson Santos ◽  
Alberto Wisniewski Jr. ◽  
Marcos Eberlin ◽  
Wolfgang Schrader
Keyword(s):  
Crude Oil ◽  
Atmospheric Pressure ◽  
Molecular Level ◽  
Carbon Number ◽  
Mass Spectrometric ◽  
Oil Refining ◽  
Crude Oils ◽  
Spectrometric Analysis ◽  
Ft Icr Ms ◽  
Ft Icr

Different ionization techniques based on different principles have been applied for the direct mass spectrometric (MS) analysis of crude oils providing composition profiles. Such profiles have been used to infer a number of crude oil properties. We have tested the ability of two major atmospheric pressure ionization techniques, electrospray ionization (ESI(±)) and atmospheric pressure photoionization (APPI(+)), in conjunction with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The ultrahigh resolution and accuracy measurements of FT-ICR MS allow for the correlation of mass spectrometric (MS) data with crude oil American Petroleum Institute (API) gravities, which is a major quality parameter used to guide crude oil refining, and represents a value of the density of a crude oil. The double bond equivalent (DBE) distribution as a function of the classes of constituents, as well as the carbon numbers as measured by the carbon number distributions, were examined to correlate the API gravities of heavy, medium, and light crude oils with molecular FT-ICR MS data. An aromaticity tendency was found to directly correlate the FT-ICR MS data with API gravities, regardless of the ionization technique used. This means that an analysis on the molecular level can explain the differences between a heavy and a light crude oil on the basis of the aromaticity of the compounds in different classes. This tendency of FT-ICR MS with all three techniques, namely, ESI(+), ESI(−), and APPI(+), indicates that the molecular composition of the constituents of crude oils is directly associated with API gravity.

scholarly journals Rheological and Emulsification Behavior of Xinjiang Heavy Oil and Model Oils

2016 ◽  
Vol 9 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Jiaqiang Jing ◽  
Jiatong Tan ◽  
Haili Hu ◽  
Jie Sun ◽  
Peiyu Jing
Keyword(s):  
Pressure Gradient ◽  
Crude Oil ◽  
Mineral Oil ◽  
Crude Oils ◽  
Water Separation ◽  
Oil Emulsion ◽  
Silicon Oil ◽  
Oil Water ◽  
Model Oil ◽  
White Mineral

Transparent model oils are commonly used to study the flow patterns and pressure gradient of crude oil-water flow in gathering pipes. However, there are many differences between the model oil and crude oils. The existing literatures focus on the flow pattern transition and pressure gradient calculation of model oils. This paper compares two most commonly used model oils (white mineral oil and silicon oil) with Xinjiang crude oil from the perspectives of rheological properties, oil-water interfacial tensions, emulsion photomicrographs and demulsification process. It indicates that both the white mineral oil and the crude oils are pseudo plastic fluids, while silicon oil is Newtonian fluid. The viscosity-temperature relationship of white mineral oil is similar to that of the diluted crude oil, while the silicon oil presents a less viscosity gradient with the increasing temperature. The oil-water interfacial tension can be used to evaluate the oil dispersing ability in the water phase, but not to evaluate the emulsion stability. According to the Turbiscan lab and the stability test, the model oil emulsion is less stable than that of crude oil, and easier to present water separation.

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