توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Gas Hydrate, Applications and Hazards
اطلاعات انتشار: اولین کنگره مهندسی نفت ایران، سال
تعداد صفحات: ۱۱
Gas hydrate is the solid like (crystalline) phase of a mixture of water and gases such
as nitrogen, hydrogen sulfide, carbon dioxide or various hydrocarbons, especially
methane. This gas bearing "ice" is stable only in proper thermodynamic condition like
at high pressure and low temperature, for example for methane hydrate, a pressure
more than 20 atmospheres at the freezing point of water is required. For this reason,
they can naturally occur in the deep layers of permafrost soils and mainly in the pore
spaces of ocean bottom sediments. Generally Methane hydrate constitutes over 90%
of all hydrates. In the petroleum industry suffers from the nuisance of hydrocarbon–hydrates blocking
gas pipelines in arctic regions, and this results high cost and time, hence research are
being done to providing ways to prevent or remove this problem.
Rapid methane hydrate decomposition can be triggered e.g. by earthquakes may lead
to catastrophic submarine landslides producing tsunamis of a giant size. Moreover, the
decomposition of methane hydrate may well affect the world's climate. Yet this is not
the only area of interest in the field of gas hydrates: They may be used as a cheaper
source of energy and an alternative for gas storage and transport as compared to
liquefied gas, also gas hydrates may be used in the desalination of sea water and in
many wide industrial applications like distillation, concentration, etc.
In this paper the application of gas hydrate in many fields, industrial or non–industrial
meaning the problems and hazards of gas hydrate in many areas are being
investigated.<\div>

۲A New Method For Investigation Of The Crude Oil Viscosity's Change, In High Pressure and Temperature And Unsteady State Condition
نویسنده(ها): ،
اطلاعات انتشار: چهارمین همایش ملی دانشجویی مهندسی نفت، سال
تعداد صفحات: ۱۱
Accurate measurements of fluid viscosities are essential in many industries such as petroleum industries, so there are numerous types of apparatus for obtaining viscosities of fluids at high pressures and temperatures, but presence of the many important problems by using the old methods, cause to make new method to increase the accuracy of the result and reduce the problem. In this article we present a new method and related apparatus, novel viscometer which design by B.B. Maini and S.Kokal, from Petroleum Recovery Institute, Calgary, Alberta T2L 2A6, Canada which is remove the main old apparatus’s problems, the essential features of the viscometer are that it does not require (1) a means of generating constant flow rate, or (2) a means of generating a constant pressure drop, or (3) measurement of flow rate, or (4) a large volume of the fluid being tested. Also, we present how to use this apparatus and its software as a whole, and how to calibrate it and investigate some test with this apparatus and compare the given data with the theoretical result.<\div>
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