The article discusses the issue of resource base management in a complex structure of residual reserves. To increase the efficiency of the reserves development, constant monitoring of their distribution is necessary - how much they are involved, is there any potential for additional involvement, how efficient are the areas already involved in development. The paper proposes a methodological approach to the residual reserves control process organization, which allows planning and adjusting the program of reserves development. This is of particular relevance for companies that develop assets in the late stages of development, which do not have the ability to indiscriminate drilling. On the example of one of the enterprises developing assets in the Volga-Ural oil and gas province, the structuring of residual reserves was carried out, on the basis of which a strategy for increasing the reserves involvement in development was formed. To analyze the efficiency of reserves recovery in the involved areas, a reserve utilization factor based on the displacement forecast is proposed. Its implementation made it possible to identify problem areas, on the example of one of which a highly effective program for drilling horizontal wells was subsequently implemented. Keywords: oil fields development; oil reserves; resource management; reserves development; horizontal wells.
In this work the problem of free convection of the Newtonian poorly stratified liquid in the cell warmed up from left and cooled from right with the heat-insulated horizontal boarders is presented. Liquid with small concentration of salt and initial linear stratification on cell height is considered. The model of double diffusion in a Boussinesq approximation is applied to model the process. The problem is solved both in two - and three-dimensional statement by means of a control volume method and a SIMPLE algorithm. It is shown that vortex structures at the layered mode of convection have quasi-two-dimensional character.
The article presents the developed algorithm and the results of carried out differentiation and grouping of oil deposits in the carbonate reservoirs of the Volga-Ural oil and gas province, both under development and out of exploration, according to geological parameters, the determination of which is possible at the stage of geological exploration. A method for selecting an analogue deposit, which has been in development for a long time has been worked out for a deposit coming out of exploration in order to use the experience of developing an analogue deposit in the conditions of a deposit being put into development. The comparison of the selected groups of objects by geological parameters is carried out, the characteristics of the features of each of them are given, the main differences in the geological structure are revealed. It has been established that the features of the geological structure of various groups of objects are mostly determined by their tectonic-stratigraphic confinement. Keywords: free-flow production; increase of differential pressure; field-scale experiment; well pattern; well interference; oil flow paths.
The paper discusses results of the unique field-scale experiment on halving of active wells and increase of pressure differential at bottomholes of active wells in the Bavlinskoye oil field. With a view to assess the effect of well interference between shut-in and active wells, two scenarios of oil flow lines in the reservoir, shut-in scenario and do-nothing scenario, were modeled. The numerical computation demonstrated that increase of pressure differential at an early stage of development can maintain the obtained level of production with a less number of free-flowing wells. It was also found that an optimal well pattern has to be used at an early stage of development. In this case, oil losses are lower vs. infill drilling at the late stage of development. In the latter case, high water cut challenges economic production, which was the case with half of re-entry experimental wells. Keywords: free-flow production; increase of differential pressure; field-scale experiment; well pattern; well interference; oil flow paths.
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