定量荧光录井在三塘湖盆地火成岩储集层评价中的应用

随着定量荧光录井技术的广泛应用,如何将储集层评价由以相对独立的参数特征为基础上升到量化且系列与标准化评价已成为人们关注的焦点。针对三塘湖盆地火成岩储集层与原油性质的特点,进行了几十口井的定量荧光录井技术应用研究,分析了不同油质类型的谱图特征和利用主峰波长及油性指数识别储集层原油性质的方法;在此基础上,通过相当油含量与油性指数和岩心与岩屑样含油产状的统计分析,结合试油与测试结果对比,提出了利用相当油含量、油性指数与含油产状评价储集层的标准,形成了适用于三塘湖盆地火成岩储集层相对规范的评价方法。实际应用表明,该评价方法解释符合率较高,为该盆地原油油质与储集层解释评价提供了有效手段。

Production of De-asphalted Oil and Fine Asphalt Particles by Supercritical Extraction

A continuous three-stage supercritical fluid extraction (SFE) process with a capacity of 1.0kg.h^-1 was setup to extract petroleum residue by pentane to obtain more oil for further upgrading. A discharging system integrated to the bottom of the extractor was used to recover solvent as gas while asphalt was obtained as fine particles. The influence of operating conditions on the yield and quality of extracts, i.e., deasphalted oil (DAO) and resin, was studied in the range of temperature 150-220℃, pressure of 4.0-6.0 MPa and the mass ratio of solvent to oil feed (S/O) 2.5-5.0. The particle size distribution, apparent forms and the packing density, which vary with operating pressure, were measured. The particle structures were observed by SEM as well. With the modification to conventional processes, furnace can be eliminated for solvent recovery from asphalt phase, so as to reduce energy consumption.

Molecular Characterization of Hydrotreated Atmospheric Residue Derived from Arabian Heavy Crude by GC FI/FD TOF MS and APPI FT-ICR MS

High resolution mass spectrometry in combination with distillation and SARA fractionation provides us an opportunity for in-depth understanding about the hydrotreating process at the molecular level. In this study, the atmospheric residue derived from Arabian heavy crude and its hydrotreated products were initially subjected to distillation and SARA fractionation. The saturates were characterized by GC FI/FD TOF MS. The aromatics and resins were characterized by APPI FT-ICR MS. Compositional changes of different compounds (paraffins, naphthenes, aromatic hydrocarbons, and heteroatomic compounds) contained in different distillates (vacuum gas oil, vacuum residue) were obtained. More detailed knowledge about the hydrotreating process was achieved.

Production of Quality Hydrogenated Base Oils through Isodewaxing Technology

This article presents the successful experience in adopting the Isodewaxing technology in the lube oil unit of Shanghai Gaoqiao refinery. In line with the demand of different crude slate for different reaction depth, and good match between the optimal product quality and the yield, the refinery has make strenuous efforts to optimize the operation and reduce the energy consumption to manufacture high-quality hydrogenated base stocks.

Study of Oil/Water Interfacial Tension of Vacuum Residual Fractions from Iranian Light Crude Oil

The vacuum residual from Iranian Light crude oil are separated into a series of 16 narrow fractions according to the molecular weight by the supercritical fluid extraction and fractional (SFEF) technology. The chemical element and the UV spectrum of each fraction are analyzed. The effects of several factors on the interfacial tension are investigated, which are the fraction concentration in oil phase, the ratio of oil component, the salts dissolved in the water phase and the pH value. The interfacial tension decreases rapidly as the concentration of the residual fraction in the oil increases, showing a higher interfacial activity of the fraction. The interfacial tension changes, as the amount of absorption or the state of the fractions in the interface changes resulting from different ratios of oil, different kinds or concentrations of salts in water, and different pH values. It is concluded that the interfacial tension changes regularly, corresponding to the regular molecular parameters of the vacuum residual fractions.

Macauba as Promising Substrate for Crude Oil and Biodiesel Production

The preparation of macauba fruits （Acrocomia aculeate （Jacq.） Lodd. ex Martius） both for oil extraction by continuous pressing and biodiesel production were investigated. The fruits and its pulp and kernel were characterized for their resulting oils. Experimental design was carried out to study the transesterification of each oil to obtain the concentrations of ethanol and catalyst that would provide the best biodiesel yield. A higher amount of biodiesel was produced from the best conditions to evaluate some characteristics as specified by ANP （National Agency of Petroleum, Natural Gas and Biofuels）. The results showed a variation in the fruits composition and different characteristics presented by the pulp and kernel oil. It was possible to define technological steps to obtain oil from the fruits of macauba and find the optimal conditions to biodiesel production, concentration of catalyst 4.42% and 5% and 13.3：1 and 9：1 ethanol：oil molar ratio to kernel oil and pulp oil, respectively.

Swelling and Deswelling Kinetics of AT-O3S Polymer

In the oil industry, techniques decreasing unwanted water production have drawn large amounts of interest from many companies. During water injection operations, water is injected into the oil reservoir to extract oil trapped in the formation. Due to the heterogeneity in the reservoir formation, oil production will decline and water production will increase as the injected water sweeps the high permeability zones. In order to flush out the oil remaining in the low permeability zones, many treatments have been used. One such treatment involves the injection of an SAP （superabsorbent polymer） into the high permeability zones. The swelled polymer will decrease the heterogeneity of reservoir permeability, thus forcing water injection into the oil rich, unswept zones/areas of the formation. Proper application of an SAP can have a dramatic impact on both the production and lifespan of mature oil wells. Successful treatment is reliant upon the reservoir salinity, temperature, and pH.