Исследование состава и свойств нефтей месторождений Западной Сибири

В данной работе выполнены исследования в области состава и свойств высокопарафинистых нефтей месторождений Западной Сибири. Цель работы: исследование физико-химических свойств нефти со временем эксплуатации скважин месторождений Западной Сибири, для выбора наиболее выгодного метода транспортировки. Для достижения поставленной цели изучили химический состав, промысловую подготовку нефти, рассмотрели проблемы, возникающие при перекачке и способы транспортировки парафинистой нефти, исследовали изменение физико – химических свойств парафинистых нефтей Верхне-Салатского месторождения эксплуатационной скважины № 123.The purpose of the work: study of changes in physical and chemical properties of oil over the time of operation of wells of fields of Western Siberia, in order to choose the most profitable method of transportation. In order to achieve this goal, the chemical composition, field preparation of oil were studied, problems arising during pumping and methods of transportation of paraffinic oil were considered, changes in physical and chemical properties of paraffinic oils of the Verkhne-Salatskoye field of production well No. 123 were investigated

Generation and characterization of standardized forms of trehalose dihydrate and their associated solid-state behavior

Trehalose dihydrate is a nonreducing disaccharide which has generated great interest in the food and pharmaceutical industries. However, it is well recognized that considerable batch to batch variation exists for supposedly identical samples, particularly in terms of the thermal response. In this investigation, two standardized forms of trehalose dihydrate were generated using two distinct crystallization pathways. The two batches were characterized using scanning electron microscopy, X-ray powder diffraction, and FTIR. The thermal responses of the two forms were then studied using modulated temperature differential scanning calorimetry (MTDSC) and thermogravimetric analysis (TGA). In particular, we describe the technique of quasi-isothermal MTDSC as a means of studying the change in equilibrium heat capacity as a function of temperature. Finally, variable temperature FTIR was utilized to assess the change in bonding configuration as a function of temperature. SEM revealed significant differences in the continuity and grain structure of the two batches. The TGA, MTDSC, and quasi-isothermal MTDSC studies all indicated significant differences in the thermal response and water loss profile. This was confirmed using variable temperature FTIR which indicated differences in bond reconfiguration as a function of temperature. We ascribe these differences to variations in the route by which water may leave the structure, possibly associated with grain size. The study has therefore demonstrated that chemically identical dihydrate forms may show significant differences in thermal response. We believe that this may assist in interpreting and hence controlling interbatch variation for this material