The present work objective is to define the main reasons causing complexity of defining leakage location at a multi-line gas-pipeline by a shift dispatching personnel on the basis of the information received from the linear telemechanics system. Analysis of dispatcher actions in case of real breakdown elimination when the gas-pipeline is broken completely was carried out. As a result of the analysis there are indicated available telemechanics systems basic shortcomings and the ways to solve the said problems. An important aspect presented in the work is the necessity of using system approach to the information recorded by the linear telemechanics system and creating additional methods and algorithms for automated processing this information in order to define the time and location of the emerged leakage without specialized sensors.
The article is devoted to the problem of forecasting hydrocarbon deposits in the junction zone of Western Siberia and the Siberian platform. Features of geodynamic processes can be used to increase the efficiency of prospecting. Geodynamic stresses of different genesis are one of the factors in the formation of the natural size classes of reserves and resources in the studying area. The activation of geodynamic processes in certain periods of the geological history of theregion led to the formation of non-structural and combined traps, the reformation of the conditions of occurrence of hydrocarbon accumulations.
The results obtained by methods of electrical exploration and GPR in the area of hazardous engineering and permafrost processes in the territory of oil and gas facilities located in the cryolithozone are presented. On the geoelectric and GPR sections, the presence of ground ice lenses was determined from the contrast difference of electrical resistivity and amplitudes of electromagnetic waves, respectively. In the immediate vicinity of engineering structures, a significant decrease in electrical resistance is observed, presumably associated with the degradation of permafrost soils as a result of the technogenic impact of engineering structures on changes in snow accumulation and changes in surface and groundwater runoff. The high efficiency of geophysical methods in solving engineering and geocryological problems at the stages of design, construction and operation of engineering structures is shown.
In article are described some examples of high effectiveness of modern land acquisition, of new field technique and constructing and testing of new marine vibrator.
PJSC “Tatneft” implements a program to optimize production and reduce its own costs. Reducing the cost of operating onshore oilfield equipment is one of the most important tasks in the framework of the designated program. This article discusses technical solutions aimed at optimizing production processes in the field of exploitation of oilfield equipment.
In the process of a mechanized method of oil production by sucker-rod pumping units, there are a number of technical problems that have a serious impact on the efficiency of operation of the production stock of wells and, in general, on the volume of oil production. Such problems should include:
1) the imperfection of the existing valve designs for bleeding gases from the annular space of oil wells through tubing to the wellhead fittings, 2) the lack of the possibility of technological studies to measure the degree of congestion of SHGN ground drives equipped with a rotator, 3) intensive wear of stuffing boxes due to damage to the working surface polished stock.
Following the transition of most oilfields to the decline phase of development (mature oilfields) there are a growing number of problems related to oil well operation keep arising, particularly, formation of asphalt-resin-paraffin deposits (ARPD). The existing various solutions for the prevention of deposits of asphalt-resin-paraffin substances in downhole pumping equipment (DPE) do not make it possible to completely solve the problem, hence, the problem of ARPD removing is relevant. The ARPD problem in Sheshmaoil Management Company LLC exists on Uratminskoye oilfield, where the number of premature repairs reached 80 %.
Thermal methods are promising for the extraction of high viscosity oils and bitumen. For most fields with high viscosity oils, thermal methods of exposure may be the only ones that allow industrial development. Thermal methods are expensive and economically feasible, mainly for medium and large deposits.
The work considers the mutual influence of the operation of injection and producing wells. According to the results of the interpretation of tracer studies, the presence of seven channels of low filtration resistance was established. Calculations of the pore space volume of highly ntercalationlayers, permeability coefficients, pore channel radii, and mass of the adsorbed indicator are presented. The mass of the tracer lost as a result of diffusion processes is calculated. A method for determining the diffusion coefficient from the results of the interpretation of tracer studies is proposed. It is shown that the bulk of the pumped tracer during the movement from the injection to the production well is “lost” as a result of diffusion. After the technology of alignment of the injectivity profile (runway) in the injection well, the operating period of the producing well is analyzed. After repeated tracing studies, the presence of only one highly ntercalationinterlayer with less permeability and radius of the pore channel was found. The reasons for a slight change in the water cut coefficient after runway technology are established.
The fulfillment of design indicators in the development of oil fields while maintaining reservoir pressure by water injection largely depends on the effective operation of injection wells. The issues of preventing the loss of injectivity and identifying the main causes of its deterioration, against which it is necessary to develop effective methods for regulating the filtration-capacitive characteristics in the bottomhole formation zone, which can qualitatively and quantitatively restore it and, as a result, increase the coverage of the reservoirs with water flooding, and currently remain relevant in due to constantly changing formation conditions, economic costs and toughening environmental requirements.
In this paper, we consider an approach to determining the geometrical parameters of fractures (half-length, effective permeability, height) of a horizontal well with multistage hydraulic fracturing, based on the automated history matching of the model (using the CMG CMOST software product) to the data on the flow of fluids from fractures obtained by the quantum tracer-based technologies. It is shown that the use of inflow profile data can significantly improve the quality of adaptation of the three-dimensional hydrodynamic model, as well as identify the fractures geometric parameters.
The article considers the possibility of increasing the production of liquid hydrocarbons (oil and retrograde condensate) from a depleted oil-gas-condensate deposit on the example of Vuktylskoye oil-gas-condensate field. Increased production can be achieved by injection of a mixture of propane-butane fraction and reservoir gas or dry gas. The results of estimating production volumes of liquid hydrocarbons due to evaporation into the vapor phase during injection of dry gas and reservoir gas, both pure or enriched with propane-butane fraction in various concentrations, are presented. The minimum miscibility pressure is calculated for injection of dry gas enriched with the propanebutane fraction.
This article gives analysis of impact of thermal gas method on light oil fields in West Siberia. This problem is relevant for oil fields with high viscosity. These hydrocarbons are characterized by bituminous composition and located mainly in tight rock formations. It should be noted that the world resources of such oils significantly exceed the reserves of low viscosity oils. The article gives information on the geographical location and geological structure of the fields.
According to research data, this method is very attractive in terms of accessibility and economic efficiency.
The essence of this method consists of the air injection via special compressor units placed in the well. This method allows to extract oil in reservoirs with a complex geological structure. There are positive and negative qualities of this method. Perspective use of nanotechnology displays in using the thermogas method (nanocoatings and nanotechnological measures of increasing oil recovery).
The article is represents generalization previously obtained results in development of thermal gas method and suggests the applying this method in the fields of Udmurtia.
Over the last years heating cable systems have become widely used in the oil and gas industry for the prevention and control of asphalt, resin and paraffin deposits in the tubing. In addition, heating cables are being used during the production of high-viscosity oils to prevent the sucker rods from sticking during the down-stroke. In this case the heating cable line is lowered into the well on the exterior of the oil-well tubing and is fastened to the tubing by clamps. This method of the heating cable application has a low efficiency factor because a significant part of the produced heat is absorbed by the well and the surrounding rock. The authors propose an implementation of heating cable lines inside of hollow sucker rods on the interval from the wellhead till the end of the asphalt, resin and paraffin deposition zone. It is worth noting that the inner space of sucker rods is not used for oil lifting. This provides the realization of an oil heating sucker rod pumping system with a high efficiency factor. Additionally, it improves the safety of the cable installation operations and the whole system operation.
The article describes the viscometers based on the principle of measuring the ball falling time inside a calibrated tube according to the Höppler method, their disadvantages are also mentioned. Considering the existing shortcomings, a portable field viscometer has been developed at Sheshmaoil Management Company LLC, which has been certified and has successfully passed field tests. A portable viscometer enables product sampling under pressure and measuring the viscosity immediately after sampling. Measurements are carried out after removal of free gas phase from the oil-in-water mixture in order to obtain correct results.
PJSC TATNEFT implements a program to optimize production processes and reduce costs. Reducing the cost of operating ground-based oilfield equipment is one of the most important tasks within the framework of the designated program. In this article, technical solutions aimed at optimizing production processes in the field of operation of equipment of the production well stock are considered. In the process of a mechanized method of oil production by sucker-rod pumping units, there are a number of technical problems that have a serious impact on the efficiency of operation of the production stock of wells and, in general, on the volume of oil production. A large-scale problem in the operation of pumping units is oil leakage on drive gearboxes.
Features of calculation and selection of the equipment for a stage of cleaning for production of non-carcinogenic oils of plasticizers for tires, rubbers and plastics are stated. As a result of the study of the purification technique, it was found that it is inefficient to regenerate the oil according to traditional schemes in the presence of a solid phase dispersed into a liquid. In this regard, a rotary-disk type device was added to the cleaning scheme. It is shown that the process limits the kinetic region, so the delay time of particles in the sections of the apparatus will be the decisive factor. The dependences and methods for theoretical and experimental analysis of the performance of the device are proposed. As a result of the research, recommendations were also obtained that can be applied in the operation and development of technological adsorption equipment.
The article assesses the efficiency of the GTT system (horizontal pipe in the pipe) at different positions of the cooling pipes with a closed end (TOZK). Within the framework of studies tests were carried out at three positions of the TOZK: horizontal, slightly inclined (their far end is lowered by 0.5 m) and anti-inclined (their far end is raised by 0.5 m), at various thermal loads.
The paper presents the results of calculating the stresses in the wall of an underground pipeline loaded with pipeline solid weight in the angles of rotation on convex sections of the pipeline. Taking into account the random nature of the yield strength of tube steels, samples of actual values obtained for the material of pipes from different manufacturers, the strength of curvilinear sections of the main pipeline was evaluated. The necessity of individual selection of the weight of a pipeline solid weight for each section of the pipeline is justified taking into account the specific law and the dispersion limits of the yield strength of the pipe material used during the construction phase of the section.
Showing the relationship between the constructive and technological process of hardening threaded conical surface drill pipe (geometry of a strengthening of the movie, the size of the load, radius of hollow), magnitude and distribution of residual stresses in a threaded surface based on complex mathematical models developed and a series of pilot studies stress-strain state threads and fatigue tests.
One of the significant sources of the increase in reserves and oil production at the present stage are deposits of super-viscous oils (natural bitumen), the geological resources of which in the Republic of Tatarstan range from 1.5 to 7 billion. The fields of super-viscous oils have their own characteristics: small depths and sizes, oils have high density and viscosity.
Every year, as the oil industry develops, the technological impact on the environment and the geological environment is intensifying.
In the second half of the last century, the first symptoms appeared, indicating the alarming consequences of intensive mining.