Vol 2, No 1 (2020)
- Year: 2020
- Articles: 9
- URL: https://vestnik-ngo.kz/2707-4226/issue/view/4357
- DOI: https://doi.org/10.54859/kjogi.202021
Full Issue
Articles
Hydrocarbon potential of the Kobylandy-Tamdy upfold of the northern edge of Pricaspian basin
Abstract
In the present article geological structure of Kobylandy-Tamdy Paleozoic upfold of the Pricaspian basin is described, the upfold was discovered and delineated based on seismic exploration and drilling results. On the example of Kobylandy area hydrocarbon potential of pre-salt complex of the conjunction of the Northen and Eastern edges of Pricaspian basin was evaluated and resources were estimated. New prospective structures were delineated within the Paleozoic sedimentary cover, which can be ranked as the first priority exploration drilling targets in the region.
3-18
Hydrocarbon exploration method based on basin modeling
Abstract
Basin modeling is a tool that combines geological, geophysical, geochemical and field data, as well as practical geological knowledge in order to reconstruct the entire chain of tectono-sedimentological processes of sedimentary basins. Current approach allows us to understand in more detail the principles of the petroleum systems- mechanisms of generation, migration and accumulation of hydrocarbons.
The paper describes the process of basin modeling starting from the stages of complex geological and geophysical analysis, interpretation and integration of data, ending with a risk assessment of the potential pool of prospects and selection of prospects for subsoil use.
19-32
Geological structure and modeling carbonate reservoirs of kt-ii of theKozhasay field(the esatern edge of pricaspian basin
Abstract
In the present work the major results of integrating data from Kozhasay field for 3D geological modeling had been described (regional geological data, exploration and production drilling results, core and cuttings data, 3D seismic data interpretation results, borehole images). The entire borehole imaging data were revised and used for fracture modeling. The hybrid fracture model was generated (discret and implicit fractures). The Kozhasay field had been under production since 2003 and it has produced 4 % of the STOIIP as for 01.01.2019. Theintegrated geological model of KT-II carbonate reservoirs was used to create hydrodynamic model of the field.
33-42
Second stage of geological exploration works. Description of complex non-traditional hydrocarbon traps
Abstract
The article reveals the possible causes of the current state of the oil and gas industry, the reasons for the decline in production, and the inefficiency of geological exploration based on study and synthesis of historical materials and available articles regarding exploration, exploitation and production on the main Kazakhstani fields and analysis of world experience in geological exploration. It is suggested to revise the “classical” approaches (paradigms) about the geological structure according to the new geological ideas and accelerate the transition to the second stage of exploration aimed at identifying “non-traditional” types of non-anticlinal traps with using new exploration technologies, methodological approaches to increase efficiency prospecting, exploration and production to ensure the stability of the oil and gas reserves growth in Kazakhstan.
43-47
Increasing the efficiency of the development of carbonate collectors by horizontal well systems
Abstract
Reservoir development of fractured reservoirs is an essential problem. 90% of oil reserves in the fields of Kazmunaigas is concentrated in fractured reservoirs. Due to the double porosity, the development of such collectors is less effective by standard methods, therefore application of the new approaches is extremely vital. This article presents a method for developing pore-fractured reservoirs with a horizontal well system. To implement this method, 3D simulation model was build and respective calculations were performed. As a result, the horizontal well system has shown its efficiency compared to the development of fractured reservoirs by vertical wells.
48-59
Asphalt-resin-paraffin deposits of the western kazakhstan and compositions for their removal
Abstract
New composite mixtures have been created to remove and dissolve asphalt-resin-paraffin deposits (ARPD) of the Uzen and Karazhanbas oilfields. The analysis of the structural-groupcomposition of ARPD was carried out and the solvent capacity of binary solvent systems containing straight-run gasoline and o-xylene was evaluated. Atactic polypropylene in an amount of 0.1 -0.5 mass.% was used as the active component.
The selection of ARPD solvent compositions and an assessment of their effectiveness were carried out in dynamic and static modes.
It was revealed that the created composite systems provide complete destruction and dissolution of the ARPD, the solvent composition containing 50 mass.% of the o-xylene, 50 mass.% of the straight-run gasoline and 0.5 mass.% of the atactic polypropylene (APP) has the best washing, dissolving and removing effect. When using this solvent composition, a maximum increase in solvent saturation with high molecular weight paraffin compounds is observed.
60-69
Obtaining lightweighted cementing materials from local raw materials for cementing wells in corrosion-active environment
Abstract
The study is devoted to the analysis of the current conditions for cementing of deepwells in Western Kazakhstan and the development of the theoretical foundations for obtaining lightweight corrosion-resistant cementing materials using local raw materials.
This paper presents the theoretical justification for reducing the density of grouting materials and increasing the corrosion resistance of the resulting grouting mortars and stone with the addition of natural carbonate materials for the presence of acidic aggressive components (hydrogen sulfide and carbon dioxide) in the formation fluids. To obtain a homogeneous dense structure of cement stone, disintegration technology is justified.
During the research, both standard and special methods were used to study the properties of grouting materials in a corrosive environment. Processing of experimental data and planning of the experiment was carried out using methods of mathematical statistics.
70-82
Component composition of dissolved organic compounds of sewage water of uzen’ oilfield
Abstract
The composition of extracts of volatile dissolved organic compounds of the wastewater of the Ozen oilfield was studied by chromatography-mass spectrometry (GC/MS). It has been established that the main components are hydrocarbons. It should be noted the presence in the water of benzyl chloride (benzene chloride) -1.3%, the content of which is strictly regulated in oil. A low content of organic acids (palmitic acid) is observed. It should also be noted the presence of tertiary N, N-dimethyldodecanamine (C-12) upto 2.3% and N, N-dimethyltridecanamine (C-13), which are components of corrosion inhibitors. The presence of xylene, mesitylene, 1,2,3-trimethylbenzene and 2,6-dimethylnaphthalene indicates the possible use of the demulsifier type Tretolite. A significant amount of squalene, which is a natural biomarker of oils has also been discovered.
83-92
Net environmental benefit analysis as an instrument for applied decisions
Abstract
Net environmental benefit analysis (NEBA) is a structured simplified procedure that allows you to compare the positive or negative effects of various methods of oil spill response at sea for the environment in specific conditions. In accordance with the legislative acts of the country, the decision on the application or non-application of oil spill response methods should be prepared only on the basis of NEBA, and therefore the contents of this new tool are disclosed in this work.
93-107