Том 1, № 1 (2019)

Based on the study of core material, the article proposes a new method for facies analysis of the section of the productive strata of Azerbaijan’s fields, as well as identifies facies variability direction of the “pereryv” formation. Methodological aspects of studying the structure of grains of deposits of the productive strata using a binocular microscope are considered. A 3D model of the spatial arrangement of the facies of the alluvial-delta genesis was constructed and their relationship with the structure of the South Caspian Depression was established, which makes it possible to correctly design wells both during prospecting and exploration drilling, and during field development.

Developing a field underlayed by bottom water still remains one of the main issues in petroleum industry. Numerous articles have been devoted to this issue offering methods for calculating the maximum water-free production rate on such fields. The paper shows such production rate calculated for the field “B”. In this paper we also calculated maximum waterfree production rate with different initial reservoir parameters and identified the dependence of the maximum water-free production rate from formation exposure, permeability and viscosity. Based on these dependences we selected criteria that allow potential application of maximum water-free production rate.

Nowadays, a wide range of perforation methods and technologies are offered in the market of secondary opening in reservoir beds. Furthermore, many manufacturing companies are modernizing previously existing methods, one of which is hydromechanical piercing perforation - a relatively new method of opening the reservoir to obtain a hydrocarbon influx in a gentle mode without any deformation of the initial state of the walls of the production string and cement ring. The developers of this method note a number of advantages compared to other types of perforation. The article describes the operation principle of the oil and gas production and the resulting effect, approach and selection of wells for this method.

This article presents the results of the first multi-stage hydraulic fracturing in a vertical well at a field in the Aktobe region. The field has been developed from the very beginning as one development object. The total height of the deposits in some places reaches 400 m; accordingly, since the start of development, all productive formations were perforated through without segregation. Field trial carried out on a well with perforation with a total thickness of 182 m revealed 4 productive formations. In order to open all productive layers with fractures and involve them in the development, it was decided to use a 4 stage layout with a hydraulic fracturing sleeve system with a repeated opening / closing cycle. As a result, after multi-stage hydraulic fracturing using this technology, a 4-fold increase in oil production was obtained. In the future, it is planned to apply this method to other candidate wells.

In this work, we perform an analysis of local raw materials as facilitating additives to cements, analysis of data on cementing of wells, and also search for ways to reduce the cost of well cementing.
Compositions of lightweight cementing materials that meet the geological and technical conditions for well attachment have been developed, cementing of well No. 205 at the Zholamanov field has been carried out, and cementing quality has been analyzed.

Improving the operational efficiency of developing fields in the late stages of operation is one of the priority tasks of oil producing organizations. Optimization of field development is achieved, as one of the ways, by stopping of uneconomic production. The article discusses methods for assessing the well efficiency and achieving break-even for the uneconomic well stock through determining targets and applying an algorithm for making further decisions on uneconomic well stock. The resulting tool will improve the efficiency of field operations and get an additional economic effect from the optimization of the well stock.