Yarega oil and titanium deposit is a unique facility due to a combination of two mineral resources – oil and titanium ore – in one geologic structure. The paper describes mining and geologic conditions of the field, as well as engineering solutions to enhance oil recovery and the efficiency of heat transfer. The author focuses on the issues of deposit opening and preparation for development, and provides recommendations regarding the exploitation procedure of the oil and titanium parts of the field, which take into account field data on the extraction rates of high viscosity oil and titanium ore from the start of deposit development. The paper contains analysis of existing technological schemes of high viscosity oil extraction and steam heating of the oil bed, as well as assessment of their feasibility. Issues of field preparation for development are reviewed from the position of accumulated practical experience, and recommendations on the feasibility of combined underground and open-pit mining are supported with evidence. The main advantages of the proposed system are explained; key technical and economic indicators are calculated.
The paper presents properties of the rocks according to their resistance to drilling. The effects of differential pressure on the rock drillability and changes in rocks strength depending on the depth of their occurrence and crushing conditions are examined. The interlinkage between technological processes for rock crushing at the borehole bottom and breaking stresses has been analyzed. The interlinkage between the breaking loads and deformations of rocks with account of their structural changes and rate of loading has been assessed. The relevance and applicability of identified regularities between stresses, deformations and differential pressure for solving practical tasks of efficient rock crushing in the course of drilling have been assessed. Issues of providing theoretical evidence for the rock breakage with the rock cutting tools in the bottom-hole conditions have been reviewed. It is proven that the rock destruction effect of drilling depends not only on the value of the breaking load but also on the rate of its application.
There is full rationale of the phenomenological model of complicated riphean fractured carbonate reservoirs of Yurubcheno-Tokhomskaya oil-gas bearing area, created for simulation of development process for unique oil and gas deposits. The block discrete organization of these complex structure reservoirs are allow them non-additive and non-linear properties under development. Their marked similarity of their structure in a wide range of sizes, as well as the phenomenon of self-organization characteristic of complex nonequilibrium systems. Based on these production rates and their total cumulative production within such hydrocarbon obey a power law distribution, which is characteristic of the behavior of many nonlinear systems and can be described by Pareto. To implement the suggested model has been written special computer program compatible with the hydrodynamic simulation «Tempest MORE» of «Roxar».
The problem to increase of deposit oil recovery with difficult stocks high-viscosity oil and bitumens is considered. Results of experimental research to decrease the effective viscosity of oil samples and increase in mobility are considered at influence of superheated steam with addition in the heat-carrier of insignificant volumes of reagent (kerosene, diesel fuel) in 0,001-0,02 % of weight. It is recommended to apply thermal and plasma-pulse influence on a layer to increase of oil recovery. Results of practical technology application are given in several geological conditions.
In article the question of dynamic influence on shaft drift a moving vessel is considered. Dependences of pressure in system «massive – support – shaft drift» from various in a direction and value of the loadings received by means of a method of final elements are resulted.
Forecast of stress and strain state of deep underground metro stations is considered in this article. A complex approach to study of static work of the metro stations including the in situ testing at different stages of their construction and numerical modeling with finite element method is shown.
The issues of determination of stresses in rock massif at its heating by high-temperature steam are considered. The obtained dependences for determining the temperature stresses correspond to both flat and volumetric stressed state of the rock massif.
The article deals with the issues of efficiency of pipeline transportation of hardening mixtures for laying of excavated spaces for conditions of petrotitanium deposit. The methodology of determination of key parameters of pipelines for delivery of hardening mixtures to the places of their laying is developed. Schemes of the main devices and devices for controlling the work of pipelines are given.
The results of studies on the development of parameters of drilling fluids and flushing modes when drilling vertical, deviated and horizontal wells, as well as the methodology for determining the optimal parameters of drilling fluids and drilling modes are presented.
The methods of determining the parameters of anisotropy of rocks, containing mine workings, the nature of the deformation of rocks in the contour zone during elastic-plastic deformation are shown. The issues of determining the shapes and sizes of inelastic deformation zones depending on the physical and mechanical properties of rocks, the depth of mine workings and the size of the cross-sectional section are considered.
