编号 4 (2023)
Editorial materials
Oil and Gas Studies. 2023;(4):11
11
ANNIVERSARY
V. P. Ovchinnikov: 75 Years of Advancing Science and Knowledge
Oil and Gas Studies. 2023;(4):12-14
12-14
Honoring 80 Years of Innovation: The Scientific Legacy of M. I. Korabelnikov
Oil and Gas Studies. 2023;(4):15-16
15-16
DRILLING OF WELLS AND FIELDS DEVELOPMENT
Waterflood-induced fracture or "Two-Step-Rate-Test" to improve reservoir injectivity
摘要
Low permeability reservoirs (less than 1 mD) are developed by intensive waterflooding. The agent is injected at pressures higher than the fracturing pressure, so that in almost every well involved in this procedure, there is spontaneous growth (injection) of artificial fractures in different directions with different characteristics, and so on. The relevance of the topic is due to a new procedure called two-stage reservoir injectivity enhancement using multiple injection modes, this technique is used to determine the test fluid injection pressure at which fracture growth will occur. The problem of this study is to increase the injectivity of the injection well in order to increase fluid production. The aim and purpose of the work is the process of increasing the injectivity of injection wells by "steps" (Step-Rate-Test is SRT): a study of the Tevlinsko-Russkinskoye field. The moment of autofracturing is determined by SRT and not by injectivity. The method of interpretation is plotting. The difference between SRT and 2-SRT is considered, the 2-SRT well treatment is carried out, the efficiency of the applied method and the results of the work are presented.
Oil and Gas Studies. 2023;(4):17-26
17-26
A review of some methods and results of studies in the "well - reservoir" system
摘要
The physicochemical interactions between drilling mud, rock and in-situ fluids in the "well - reservoir" system are of increasing interest to oilfield drilling researchers. Usually, the main aim of research is development of an optimal drilling fluid that provides trouble-free drilling, reducing non-productive time to eliminate various problems, and effectively exposes of oil and gas reservoirs under certain geological conditions. The history of research in this area goes back more than a dozen years. However, given the difficulties of modeling real geological conditions in the laboratory, and the characteristic attachment of previous results to them, there is still plenty of untapped potential. The purpose of this article is a literature review of the applied research methods to assess the level of scientific and technical development, evaluate the achieved research results, a possibility of their distribution to the target objects and further development.
Oil and Gas Studies. 2023;(4):27-41
27-41
Stability studies of dispersed systems for physicochemical methods to enhance oil recovery in the presence of a hydrophobic filler
摘要
As the formation of highly permeable zones in the reservoir results in progressive watering of the produced products, restricting the movement of the oil displacement agent is one of the main conditions for further improving the effectiveness of methods for influencing oil-saturated formations. This can be achieved by targeted tamponing with physicochemical compositions of highly conductive channels and artificial fractures. In most cases, there is a redistribution of flow and, as a result, previously undrained reservoir intervals are brought into production.The effect of tamponing is best achieved by the use of dispersed systems containing various fillers. The use of such technologies is regulated in many documents used in the work of oil and gas producing enterprises. The formation of a high-quality water barrier in such technologies depends on the stability of the working composition.The article is devoted to the study of the influence of filler hydrophobicity on the sedimentation and aggregation stability of dispersed systems. The conditions under which the systems show the least tendency to sedimentation and are aggregatively unstable are considered. It has been shown experimentally that the stability of the systems is influenced by the hydrophobic properties of the filler, which do not allow the particles to enter the aqueous phase, swell and precipitate, thereby reducing the sedimentation stability. It has been shown experimentally that the systems composed of NaQMC or PetroPam P-104 have similar indicators for the time of onset of mass deposition of particles, their average calculated deposition rates as well as viscosity characteristics.
Oil and Gas Studies. 2023;(4):42-51
42-51
An estimation of gas volume in the water-saturated part of Cenomanian gas reservoirs: a case study of the Medvezhye oil and gas condensate field
摘要
The amount of remaining recoverable natural gas reserves is affected by the pinching of gas reserves by infiltrating water and degassing of formation water in the Cenomanian water-pressure complex. It is necessary to reliably determine the volume of gas-saturated water in order to estimate the volume of gas dissolved in produced water. The area of the gas-oil contact is determined by known methods, but the height of the reservoir zone, represented by gas-saturated water (transition zone), must be specified.The fluid distribution and the structure of the transition zone depend on gravitational and capillary forces. These forces depend on the physical and chemical properties of the gas and formation water, as well as the composition and filtration properties of the reservoir. To calculate the thickness of the reservoir in which the process of gas dissolution in water takes place, it is proposed to consider it from the point of view of molecular diffusion processes.The authors of the article propose an adapted VNIIGAZ method for determining the transition zone and the volume of water in which gas from underground gas storages is dissolved (a case study of the Medvezhye oil and gas condensate field). The proposed method for calculating the volume of gas dissolved in formation waters of Cenomanian gas deposits, taking into account diffusion, showed an acceptable result. The proposed method for calculating the volume of gas dissolved in formation waters of Cenomanian gas deposits, taking into account diffusion, gave an acceptable result.
Oil and Gas Studies. 2023;(4):52-62
52-62
DESIGNING, CONSTRUCTION AND OPERATION OF PIPELINE TRANSPORT SYSTEM
Development of technology for cascade gas pressure reduction in long gas pipelines of gas distribution stations
摘要
The work developed and proposed for implementation an energy-saving technology of pipeline transportation of natural gas along long-distance branch pipelines connecting main gas pipelines and gas distribution stations. This technology consists in a step reduction of operating pressure in the gas pipeline branch with the help of linear reducing stations, with partial heating of gas due to heat exchange between the gas pipeline and the ground. The authors of the article present the results of practical approbation of the cascade gas pressure reduction technology in the operating off-take gas pipeline with the confirmed effect of reducing fuel gas consumption in the gas distribution station preheaters. The optimal parameters of gradual gas pressure reduction using linear reduction points were determined by calculation. Graphical dependencies, which determine the peculiarities of changes in temperature modes of pipeline gas transportation depending on the given pressure drop in linear pressure reduction stations for the conditions of pilot testing of the energy-saving method, have been obtained. A scheme of uniform location of linear pressure reduction stations with definition of the optimal pressure reduction mode is proposed.
Oil and Gas Studies. 2023;(4):63-74
63-74
EDUCATION REFORM: THE EXPERIENCE OF COMPANIES AND UNIVERSITIES IN THE TRAINING OF SKILLED WORKERS FOR THE OIL AND GAS INDUSTRY
Industrial adaptation and innovation: from the conventional to progress
摘要
Graduates of higher education institutions that provide specialized training in the oil and gas industry graduate with an initial engineering and technical qualification. However, the actual level of practical skills of newcomers does not allow them to work independently in production, as they are not familiar with the specifics of the processes.KogalymNIPIneft Branch of LUKOIL-Engineering LLC in Tyumen cooperates with the Industrial University of Tyumen, which is the main institution of higher education in the West Siberian region. That makes it possible to train new specialists.The basic department of KogalymNIPIneft Branch of LUKOIL-Engineering LLC in Tyumen, which are formed at the university, has the following vectors of activity: integration of education, science and production; ensuring the Company's direct involvement in educational activities; implementation of targeted training and provision of staff with new qualified staff.By getting a job in LUKOIL-Engineering LLC, graduates successfully realize themselves that allows them to become key specialists in various areas of the Company.
Oil and Gas Studies. 2023;(4):75-79
75-79
IN MEMORIAM
In memory of A. S. Oganov, the famous Russian scientist (09.03.1956 — 22.08.2023)
Oil and Gas Studies. 2023;(4):80-83
80-83
The 100th anniversary of the birth of N. D. Scherbyuk, the famous Russian scientist (26.08.1923 — 12.06.1999)
Oil and Gas Studies. 2023;(4):84-86
84-86