scholarly journals Influence of zeolitization on the migration of reservoir fluids on the example of jurassic and neocomian deposits (Yamal oil and gas region)

2021 ◽  
Vol 21 (2) ◽  
pp. 88-92
Author(s):  
Elena P. Osipova ◽  
◽  
Angela G. Astarkina ◽  
Sergey V. Astarkin ◽  
Daniil A. Strelnikov ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Gas Chromatography ◽  
Mineral Composition ◽  
Oil And Gas ◽  
Pore Space ◽  
Core Material ◽  
X Ray ◽  
The Core ◽  
Core Samples ◽  
Geochemical Studies

To assess the influence of zeolite group minerals on the migration of reservoir fluids in terrigenous deposits, complex (X-ray and gas-geochemical) studies of core material in the Yamal oil and gas region field were conducted. 54 core samples from the Pyakyakhinsky and Yuzhno-Messoyakhsky deposits were studied including 43 zeolitized and 11 non-zeolitized samples. The core samples were studied by gas chromatography to determine the content of hydrocarbons adsorbed in the pore space of the core, as well as by X-ray diffractometry to determine the mineral composition of the samples under study. The regularities of hydrocarbons distribution in the studied samples depending on the degree of their zeolization are established. The differences in the distribution of hydrocarbons in zeolitized and non-zeolitized siltstones have their own explanation. Having an ordered crystal structure and a certain size of the entrance windows zeolites are able to sorb.

scholarly journals Productivity Criteria for Complex Reservoirs Based on the Study of Deep-Adsorbed Gases

2021 ◽  
Vol 133 (2) ◽  
pp. 27-30
Author(s):  
D. A. Kobylinskiy ◽  
Keyword(s):  
Research Method ◽  
Oil And Gas ◽  
Geological Structure ◽  
Core Material ◽  
Test Results ◽  
The West ◽  
Gas Field ◽  
The Core ◽  
Oil And Gas Field ◽  
Complex Geological Structure

The work is devoted to the development of geochemical criteria for determining the nature of saturation for deep-adsorbed gases in the core. As the object of investigation used the core material selected in the fields in the Nadym-Pyrskoy oil and gas field. In each sample, 72 components were determined, namely, hydrocarbons of different material groups: normal, branched, polycyclic, and aromatic compounds from butane to dodecane. With respect to the quantitative distribution and correlation among the components, qualitative geochemical indicators of sediment productivity have been developed. The saturation character established by the criteria of deep-adsorbed gases was confirmed by the test results. In this regard, this research method significantly increases the effectiveness of diagnostics of prospective deposits, the application of which is relevant in the territory of the West Siberian oil and gas basin, especially when studying deep-submerged deposits of complex geological structure.

scholarly journals Developing geochemical criteria based on the research of Jurassic sediments to evaluate the productivity of intervals

2019 ◽  
pp. 16-21
Author(s):  
Danil A. Kobylinskiy ◽  
Mikhail D. Zavatsky ◽  
Ivan I. Nesterov ◽  
Vitaliya O. Naumenko ◽  
Andrey A. Ponomarev
Keyword(s):  
Core Material ◽  
The Core ◽  
Oxidation Reduction ◽  
Initial Stage ◽  
Reservoir Conditions ◽  
Test Record ◽  
Well Correlation ◽  
Geochemical Studies ◽  
Qualitative Characteristics ◽  
West Siberian Basin

The article is devoted to the problem of improving the substantiation of the diagnostics of production Jurassic and Neocomian reservoirs in the West Siberian basin. We have formed the complex of geochemical investigations of core material to solve this problem. It includes extraction of bitumen with its material composition detection, thermal desorption and analysis of retained hydrocarbons. Using the obtained data, we have carried out a comparative analysis of Jurassic sediment intervals in two wells within one field. We studied the quantitative and qualitative characteristics of the hydrocarbon core fluid, determined the geochemical criteria of its mobility in reservoir conditions, namely the ratio of the naphthenic component to n-alkanes. Also, we carried out inter-well correlation of the relations of n-alkanes and isoprenoids, established the facies conditions of sedimentogenesis and oxidation-reduction conditions of the initial stage of organic matter fossilization. Based on the chromatograms of retained gases we determined the efficiency criteria of the interval such as benzene/n-hexane and toluene/n-heptane. Conclusions about the saturation of the studied intervals were confirmed by inspection test record. The results of the work showed that complex geochemical studies of the core can significantly increase the reliability of the diagnosis of the drilled sediments saturation.

scholarly journals Refinement of the petrophysical model of the Achimov formation based on facial analysis of sedimentation conditions

2021 ◽  
Vol 6 (4) ◽  
pp. 22-31
Author(s):  
Guzel R. Vahitova ◽  
Anzhela A. Kazaryan ◽  
Timur F. Khaybullin
Keyword(s):  
Oil And Gas ◽  
Facies Analysis ◽  
Pore Space ◽  
Sedimentary Cover ◽  
Clay Content ◽  
Geological Structure ◽  
Space Structure ◽  
Reservoir Properties ◽  
The Core ◽  
Promising Source

Aim. Due to the depletion of reserves of the main oil and gas complexes, the greatest interest is attributed to hard-to-recover reserves, complex-built objects of the sedimentary cover, the development of which was unprofitable until recently. One of these is the oil-bearing complex of the Achimov deposits of the Malobalykskoye field in Western Siberia. This article is devoted to the facies analysis and typification of reservoir rocks of the Achimov deposits in order to increase the reliability of determining the boundaries of the reservoirs, their interpretation and assessment of the petrophysical properties of the reservoirs. At the same time, special attention is paid to the facies analysis, which determines the characteristics of the reservoir. The Achimov deposits are a promising source of increasing resources and maintaining production at a high level. With their increasing importance, there are problems that complicate the search and assessment of deposits. Such problems include a high degree of reservoir compartmentalization, sharp facies variability, complex pore space structure, high clay content, low permeability values, etc. Materials and methods. The work is based on a comprehensive interpretation of the data of the lithological description of the core, the results of laboratory studies of the core and well logging data analysis of the Achimov deposits of the Malobalykskoye field. The methods used in the interpretation of GIS data, statistical analysis, comparison. Due to the fact that the reservoir properties of sand bodies are determined by the peculiarities of their formation in different conditions of sedimentation, it is necessary to establish a relationship between the petrophysical characteristics of rocks and their facies nature by substantiating petrofacies models. The use of the latter in geological modeling makes it possible to more effectively predict the reservoir properties (reservoir properties) of various facies lithotypes. Results. The paper presents the results of facies analysis and typification of the reservoirs of the Achimov deposits of the Malobalykskoye field, on the basis of which the boundaries of the reservoirs and the effective oilsaturated thicknesses were refined. Conclusions. Based on the results of the study, it can be concluded that it is necessary to develop refined petrophysical models for reservoirs with complex geological structure that take into account the facies features of rocks.

Crystal structure of fractionally crystallized waxes isolated from crude oil

2017 ◽  
Vol 50 (2) ◽  
pp. 639-642
Author(s):  
Manisha Sahai ◽  
Ajay Kumar ◽  
Sanat Kumar
Keyword(s):  
Crystal Structure ◽  
Gas Chromatography ◽  
Crude Oil ◽  
Methyl Isobutyl Ketone ◽  
Methyl Isobutyl ◽  
X Ray Diffraction ◽  
Isobutyl Ketone ◽  
X Ray ◽  
Petroleum Wax ◽  
Crystalline Nature

A petroleum wax has been extracted from crude oil and fractionated into two parts, depending on its solubility in methyl isobutyl ketone–toluene solvent at temperatures of 298 and 313 K. The wax and its two derivatives have been analyzed for composition and crystalline nature using various techniques including gas chromatography, NMR and X-ray diffraction. It has been observed that the crystalline structure of the fractionally precipitated waxes is significantly different from the structure of the parent wax present in the crude oil.

Organic Geochemical Characteristics of Core Samples from Central Primorsk-Emba Province, Precaspian Basin, Kazakhstan

2021 ◽  
Author(s):  
Tolganay Jarassova ◽  
Mehmet Altunsoy
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Organic Matter ◽  
Aromatic Hydrocarbons ◽  
Oil And Gas ◽  
Gas Chromatography Mass Spectrometry ◽  
Type Ii ◽  
Core Samples ◽  
Chromatography Mass Spectrometry ◽  
Potential Type

Abstract The Primorsk-Emba province is one of the main oil and gas region of the Precaspian basin. The resources of the Primorsk-Emba oil and gas region range from 5 to 12 billion tons of oil and from 2 to 6 trillion m³ of natural gas. This study primarily concentrates on investigating the organic geochemistry and petroleum geology characteristics of sedimentary units that generated oil in the central Primorsk-Emba province. 20 core samples taken from the Jurassic units in the western part of the study area are characterized by organic matter amount, hydrocarbon production potential, type of organic matter, maturity of organic matter. According to the Rock-Eval results Jurassic aged rocks generally have a petroleum potential ranging from weak to excellent, the organic matter is between Type II (oil prone), Type II-III (gas-oil prone) and Type III (gas prone), and the degree of maturation is immature-mature stage. Oil extracts were characterized by geochemical methods including Gas Chromatography (GC) and Gas Chromatography–Mass Spectrometry (GC–MS). n-alkanes and isoprenoids were evaluated by High-Resolution Gas Chromatography (GC-HR), aromatic hydrocarbons were evaluated by Low Thermal Mass Gas Chromatography (GC-LTM), terpanes (hopanes), steranes / diasteranes and aromatic hydrocarbons were evaluated by Gas Chromatography-Mass Spectrometry (GC-MS). The GC and GC-MS data obtained, it has been determined whether the paleoenvironment characteristics of the study area, hydrocarbon potential, type of kerogen, maturity level of organic matter and whether it is affected by biodegradation. Distribution of n-alkanes in the GC showed that no biodegradation was observed in analyzed samples, source rock deposited in a marine environment under reducing conditions and an organic matter that occurred were generated by marine carbonates. Based on maturity parameters, studied oils are mature and located on the oil generation window. According to biomarker age parameters C28 / C29 and norcholestane (NCR)/nordiacholestane (NDR) samples are generally Mesozoic (Triassic-Jurassic- Cretaceous) origin, nevertheless there are also levels corresponding to the Paleozoic (Permian) late stages.

Simulation of fluid flow in the pore space of the core obtained by x-ray microtomography

2019 ◽  
Author(s):  
Evgeny Marfin ◽  
Denis Chachkov ◽  
Alexey Abdrashitov ◽  
Aidar Kadyirov
Keyword(s):  
Fluid Flow ◽  
Pore Space ◽  
X Ray ◽  
The Core

Role of Aluminide coating degradation on Inconel 713 LC used for Compressor Turbines (CT) of Short-haul Aircrafts

MRS Advances ◽  
2018 ◽  
Vol 3 (38) ◽  
pp. 2281-2296
Author(s):  
Joshua K. Ngoret ◽  
Venkata P. Kommula
Keyword(s):  
Aluminide Coating ◽  
Surface Coatings ◽  
Core Material ◽  
X Ray Diffraction ◽  
Early Failure ◽  
X Ray ◽  
The Core ◽  
Trailing Edges ◽  
Xrf Scanning

ABSTRACTThis paper investigates the role degradation of protective diffusion aluminide coating on Inconel 713LC used for CT blades of short-haul aircraft fleet played in having the blades prematurely retired from service at 6378 hours, as opposed to their pre-set service time of 10000 hours. The blade samples were subjected to various examinations; X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analyse at the; tips, airfoil, as well as the base, transverse and longitudinal, sectioned and unsectioned. As affirmed by both the transverse and longitudinal sections examinations, it was established that thermal attack leading to deterioration of the coating was greater at the tip and airfoils of the blades (the hotter zones) and lesser towards the bases (colder zones). As a result, severe degradation of the core material at the tips and airfoils compared to the bases and more prevalent at the leading edges than trailing edges at the tips. The results further suggest that both active outward Ni diffusion and inward Al diffusion can coexist during exploitation of the blades in service. The study illustrates the role played by the aluminide coating in early failure of CT blades with the aim of bettering the surface coatings and enhancing coating technologies, managing CT blade material monitoring as well as to give insights on advancing CT blades maintenance practices.

scholarly journals Results of geological and geophysical research on the Subotska structure of Ingulskiy megablock of the Ukrainian shield

2020 ◽  
pp. 4-12
Author(s):  
G. A. Kalashnyk
Keyword(s):  
Structural Control ◽  
Great Part ◽  
Clay Fraction ◽  
Ukrainian Shield ◽  
Core Material ◽  
Geophysical Research ◽  
Pellet Fraction ◽  
X Ray ◽  
The Core ◽  
Exploratory Wells

The article presents the results of diamond prospecting studies in the Subotska structure of the Inhulskyi megablock of Ukrainian Shield. For the results, it is indicated that the Subotska structure is mimicked by crater rocks and in some cases by manifestations of the vent facies with signs of kimberlitic-lamproitic magmatism. The typical local features of manifestations of explosive structures from maar volcanism in Subotska area are determined. The article presents the results of petrographic and mineralogical study of the core material from exploratory wells on the Subotska structure, the results of study of material composition of the clay fraction, X-ray diffraction analysis of the pellet fraction. Data of the X-ray structural analysis of the pellet fraction of samples taken from the core material from exploratory wells on the Subotska structure indicates the obvious mechanical sum, the head folder of such is calciferous montmorilonite, and also saponite, nontronite, hydromica and kaolinit. The availability of the nontronite and saponite is confirmed by the results of electronic-microscopic reports. Also the article presents the results of studying the secondary lithochemical halos of Cr, Ni, Mg, Co, Ti, V, Fe, covering the geochemical spectrum inherent in alkaline-ultrabasic rocks and their weathering crust. These halos are combined with negative gravitational anomalies associated with the explosive structures in the Subotska area. The structural control of the great part of the detected geochemical anomalies, geochemical halos are determined. According to the degree of manifestation of the complex of criteria five potential diamond-prospective structures are discovered on the Subotska area. There were developed recommendations for further research on the Subotska area.

Antipinite, KNa3Cu2(C2O4)4, a new mineral species from a guano deposit at Pabellón de Pica, Chile

2015 ◽  
Vol 79 (5) ◽  
pp. 1111-1121 ◽  
Author(s):  
Nikita V. Chukanov ◽  
Sergey M. Aksenov ◽  
Ramiza K. Rastsvetaeva ◽  
Konstantin A. Lyssenko ◽  
Dmitriy I. Belakovskiy ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Infrared Spectrum ◽  
New Mineral ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
X Ray ◽  
New Mineral Species ◽  
Mohs Hardness

AbstractThe new oxalate mineral antipinite is found in a guano deposit located on the Pabellón de Pica Mountain, Iquique Province, Tarapacá Region, Chile. Associated minerals are halite, salammoniac, chanabayaite, joanneumite and clays. Antipinite occurs as blue, imperfect, short prismatic crystals up to 0.1 mm × 0.1 mm × 0.15 mm in size, as well as their clusters and random aggregates. The mineral is brittle. Mohs hardness is 2; Dmeas = 2.53(3), Dcalc = 2.549 g cm–3. The infrared spectrum shows the presence of oxalate anions and the absence of absorptions associated with H2O molecules, C–H bonds, CO32–, NO3– and OH– ions. Antipinite is optically biaxial (+), α = 1.432(3), β = 1.530(1), γ = 1.698(5), 2Vmeas = 75(10)°, 2Vcalc = 82°. The chemical composition (electron-microprobe data, C measured by gas chromatography of products of ignition at 1200°C, wt.%) is Na2O 15.95, K2O 5.65, CuO 27.34, C2O3 48.64, total 99.58. The empirical formula is K0.96Na3.04Cu2.03(C2.00O4)4 and the idealized formula is KNa3Cu2(C2O4)4. The crystal structure was solved and refined to R = 0.033 based upon 4085 unique reflections with I > 2σ(I). Antipinite is triclinic, space group P1, a = 7.1574(5), b = 10.7099(8), c = 11.1320(8) Å, α = 113.093(1), β = 101.294(1), γ = 90.335 (1)°, V = 766.51(3) Å3, Z = 2. The strongest reflections of the powder X-ray diffraction pattern [d, Å (I,%) (hkl)] are 5.22 (40) (111), 3.47 (100) (032), 3.39 (80) (210), 3.01 (30) (033, 220), 2.543 (40) (122, 034, 104), 2.481 (30) (213), 2.315 (30) (143, 310), 1.629 (30) (146, 414, 243, 160).

Analisis Aspek Molekuler Biomarka Alkana Bercabang Core Badak 1/208 Muara Badak, Kutai Kartanegara, Kalimantan Timur

2015 ◽  
Vol 1 (1) ◽  
pp. 26
Author(s):  
R. Arizal Firmansyah ◽  
R. Y. Perry Burhan
Keyword(s):  
Gas Chromatography ◽  
Solvent Mixture ◽  
Core Sample ◽  
Aliphatic Hydrocarbon ◽  
Marine Microorganisms ◽  
The Core ◽  
Core Samples ◽  
Branched Alkanes ◽  
Layer Chromatography ◽  
Chloroform Methanol

Study compound biomarka branched alkanes on core 1/208 Rhinos have done to contribute to the activities of oil exploration wells 1/208 Muara Badak Badak, East Kalimantan's Kutai Kartanegara-through core biomarka profile branched alkanes. Core samples extracted by alternately with solvent mixture of toluene-methanol (3: 1) and chloroform-methanol (3: 1). Then fractionated by Column Chromatography and Thin Layer Chromatography to obtain aliphatic hydrocarbon fraction. Fractions obtained were identified using Gas Chromatography-Mass Spectrometry.The content biomarka aliphatichydrocarbon fraction were identified, among others, iso and anteiso alkanes, mono and trimethyl alkanes. Compounds iso and anteiso alkanes, and alkyl alkane other, providing information that the source of organic material core samples I and II is derived from microorganisms prokaryotic or biogenic precursor derived from cyanobacteria (marine microorganisms) and homologous monomethyl alkanes found in core samples II closer homologous series monomethyl alkanes found in sediments and oil and Precambrian Proterozoic era, so it can be said that the core sample II core samples older than I.

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