Tag Archives: oil
During the long-term storage there is a gradual flooding of the fuel oil and the accumulation of mechanical impurities of different nature. Carbenes, karboids and surface-active substances contained in the fuel oil lead to the formation of coarse agglomerates of tarry asphaltene substances which are precipitated. Also polymerization of hydrocarbon components and oxidation ofnon-hydrocarbon ones of the fuel oil cause it.
For cleaning fuel oil from mechanical impurities they use different designs of filters with modes of self-regeneration such as cleaning with the flow reversal of the purified liquid through the mesh, cleaning the mesh with brushes; the scanning method of cleaning.
Existing filter designs are characterized by a low degree of purification of the surface of the filter element, the removed sediment is contaminated by the fuel oil. There is contamination of the filter septum byslurry remnants after its regeneration, resulting in gradually decreasing the free area of the filter septum. For its cleaning they require shutting down the technological equipment and services of personnel to replace the filtering septum that also reduces the productivity of the production line.
The developed design of the drainage filter allows to effectively clean the filter element from mechanical impurities. During the regeneration the mesh drain filter provided for the displacement of fuel oil from the filter and steaming sediment by water vapor as well as blowing sediment into the drainage line.
The filter design allows to increase the cell size of the filter element in the regeneration mode, which facilitates efficient cleaning the mesh element.
The filter design allows to eliminate manual labor and to minimize the loss of time associated with performing maintenance operations of the filter.
The method of calculation of the technical characteristics of the filter septum in various modes of filter operation is given.
The article reveals the effect of new oil and natural gas classification establishment, which came into force on January 1st, 2016, as well as its positive and negative aspects. The classification is adjusted to the international standards of Society of Petroleum Engineers (SPE) and the USA Security and Exchange Commission (SEC). Its basic feature is the priority of economic efficiency. The practical value lies in the provision of state interests at reserves cost evaluation, which builds the major part of national wealth, as well as in the consideration of tax incentives eligibility. Introduction of such classification should result in the increase of Russian deposits investment potential as well as in the economic efficiency of hydrocarbon reserves production under the conditions of qualitative and quantitative mineral-resource base characteristics deterioration. However, the geological (reservoir type, reserve calculation algorithm, degree of reservoir structure complexity, reserves division), technological (well spacing, oil recovery factor), organizational (computer modeling) and administrative (schedule reduction and special technical and economic features of project approval) aspects could negatively reflect on small subsurface users developing one or several small and middle-sized deposits. Considering the reviewed issues, the author suggests the additional correction of legal and regulatory framework with the aim to eliminate the abovementioned consequences and to support the financial position of small subsurface users.
PROMISING PERSPECTIVES OF OIL RE-EXPLORATION IN PALEOCENE SEDIMENTS OF BLAGODARNENSKAYA STRUCTURE IN STAVROPOL REGION
Stavropol Region is one of the oldest petroleum producing regions of the country. To date, much of its fields are depleted and prospects for the discovery of large hydrocarbon deposits have been exhausted. At the same time, there is still the possibility of opening small and medium-sized deposits localized in the source rock formations.
In the middle of the last century, similar deposits have been identified within Prikumsk-Tyulenevskiy (Praskoveyskoe, Achikulakskoye, Ozek-Suat and a number of other fields) and Chernolesskiy (Zhuravskoye, Vorobyevskoye) tectonic elements. However, these findings were largely spontaneous due to lack of approved and unified approach to the petrophysical evaluation of dedicated reservoirs from well logs. At the same time the experience of shale reservoirs studies, as well as the results of its implementation to evaluation of deposits of Zhuravsky-Vorobyevsky petroleum accumulation zone, allows to revise existing well log materials for deep wells of explorational and depleted structures, and to identify promising intervals for further re-exploration and testing.
In this work, Paleocene sediments of Blagodarnenskaya explorational structure of the Stavropol Region were studied. Despite the approval of the oil bearing of these deposits within the Prikumsk-Tyulenevskiy tectonic element and the positive signs of hydrocarbon saturation from initial well logs data, its evaluation and testing within Blagodarnenskaya structure dedicated to the North-Stavropol tectonic element, were not conducted. However, the results of well logs analysis performed by us with the use of interpretation technique approved on shale reservoirs of Zhuravsky-Vorobyevsky petroleum accumulation zone, as well as the core tests indicate the presence of oil-saturated reservoirs in the Paleocene sediments of Blagodarnenskaya structure.
The sum of the obtained results and confirmation of the oil saturation of Paleocene sediments on the other structures allows us to propose promising perspectives of re-exploration of the Paleocene deposits within Blagodarnenskaya structure. The presence of a large number of abandoned deep exploration wells suitable for the re-entry allows performing re-exploration by means of the existing wells fund without drilling a new one, what would significantly reduce costs and ensure the profitability of the operation in the event of success.
The purpose of the article – state analysis, trends and prospects of development of the global hydrocarbon market. In particular, detailed analysis of the market categories such as supply and demand was made. Factors of demand for oil and natural gas, the major regions of consumption of hydrocarbons, the market structure of oil and natural gas consumption of the countries are represented. It was revealed that the growth in demand for energy resources was caused by increased motorization of individual countries (especially India and China). The major share of oil and natural gas demand at the regional level provide the Asia-Pacific region and North America, at the country level – United States (US) and China. The largest oil producer at the regional level is the Middle East, at the country level – Saudi Arabia, the United States and the Russian Federation. Saudi Arabia and the Russian Federation provide the maximum export oil supplies. The main flows of oil imports are sending to the United States, China, India and Japan. The Russian Federation leads the global natural gas market the largest proven natural gas reserves belong to Russia. The country provides the maximum export pipeline natural gas. The largest import purchases of natural gas occur in Germany, USA, Italy and Turkey. The authors calculated the figure availability of natural gas reserves of countries. Security of the Russian Federation in 2015 was 56 years. To actively growing market for liquefied natural gas is analyzed. LNG shipments rose by almost half over the past decade. The factors for expansion of markets for LNG sales are shown.