喀尔巴阡盆地(乌克兰境内)天然气形成过程中沉积后过程的流体体系特征

IF 0.5 Q4 MINERALOGY Mineralogical Journal-Ukraine Pub Date : 2022-01-01 DOI:10.15407/mineraljournal.44.03.099
I. Naumko, M. Pavlyuk, A. Loktiev, Yu.V. Khokha, В.E. Sakhno, Yu.A. Belеts’ka, N. Sava
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引用次数: 0

摘要

研究了乌克兰境内外喀尔巴阡盆地迁移古流体中的气体。利用矿物中的流体包裹体和有前途的含气岩石封闭孔隙中的流体分析了它们的性质。样品取自Mukachevo (1-Borodivsk-Novosilsk)和Solotvyno (1-Bushtyno, 4-Hrushovo, 1-Danylovo, 28-Solotvyno)凹陷的井。质谱化学分析数据表明,在挥发性化合物组成中发现了甲烷及其同系物和二氧化碳,这与喀尔巴阡盆地外含气区气田天然气中甲烷及其同系物和二氧化碳的优势相吻合。Solotvyno构造(包括Solotvyno气田)28井岩石脉口方解石中的流体包裹体中含有甲烷(98.2% vol. %)、乙烷(1.2 vol. %)和丙烷(0.6 vol. %)。只有甲烷存在于封闭的岩石孔隙中。Solotvyno气田天然气主要含甲烷(53.86%)、乙烷(2.65%)和丙烷+丁烷(1.34-0.32%)。在穆卡切沃凹陷Ruski Komarivtsi 1井岩石中细脉方解石流体包裹体中СО2含量高达97.3%,在Solotvyno凹陷Bushtyno 1井岩石中浸染物沸石流体包裹体中СО2含量高达100%。这可以用两种不同成分古流体的活动来解释,即喀尔巴阡盆地内部存在的还原型或氧化型古流体。它们与大量的还原化合物(甲烷及其同系物)或高浓度的氧化化合物有关(主要是СО2)。这是由主要高能非生物成因深层流体组成的差异决定的:含碳氢化合物或含二氧化碳。古流体气体组成表明可能存在两种类型的天然气矿床,以烃类为主或以富含二氧化碳为主,因此发现了Solotvyno等天然气田和Martovo等二氧化碳气田。油气形成的条件和主要物质范围很广(“石油多成因”),这使得人们可以对该地区的油气资源进行评估。用多成因的方法来理解油气形成过程需要改变勘探策略。在喀尔巴阡外含气区有前景的地质构造中,需要进行更多的地球化学和热压学研究以及成矿流体的热力学研究。这是必要的,以便预测可能出现的高能气体矿床和确定勘探区域。
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FEATURES OF THE FLUID REGIME OF POSTSEDIMENTOGENIC PROCESSES DURING THE FORMATION OF GAS CAPACITY OF THE TRANSCARPATHIAN BASIN (WITHIN THE LIMITS OF UKRAINE)
Gases in migrating paleofluids of the Transcarpathian Basin in Ukraine proper were investigated. Their properties were analyzed using fluid inclusions in minerals and fluids occurring in closed pores of promising gas-bearing rocks. Samples were taken from wells drilled within the Mukachevo (1-Borodivsk-Novosilsk) and Solotvyno (1-Bushtyno, 4-Hrushovo, 1-Danylovo, 28-Solotvyno) depressions. According to the data from mass-spectrometric chemical analysis, methane and its homologues and carbon dioxide were found in the composition of volatile compounds, which coincides with the identified advantage of methane and its homologues, on the one hand, and carbon dioxide, on the other hand, in the natural gases of fields of the Transcarpathian gas-bearing area. Methane (98.2 vol. %), ethane (1.2 vol. %) and propane (0.6 vol. %) are found in fluid inclusions in calcite of veinlet in the rock from the well 28 of the Solotvyno structure, which includes the Solotvyno natural gas field. Only methane is found in closed rock pores. Natural gases of the Solotvyno gas field contain methane (53.86%), ethane (2.65%) and propane + butane (1.34-0.32%). СО2 contents as high as 97.3 vol. % occur in fluid inclusions in calcite of veinlets in rocks of the well 1 at Ruski Komarivtsi of the Mukachevo depression and 100 % in fluid inclusions in zeolite (?) from impregnates in rocks of the well 1 at Bushtyno of the Solotvyno depression. This can be explained by the activity of two different composition paleofluids, namely reduced or oxidating types present in bowels of the Transcarpathian Basin. They are associated with significant amount of reduced compounds (methane and its homologues) or a high concentration of oxidized compounds for their (mainly СО2). This was determined by differences in the composition of the primary high-energy abiogenic deep fluid: hydrocarbon-containing or carbon dioxide-containing. The gas composition of paleofluids indicates that two types of natural gas deposits may exist, mainly hydrocarbon or mainly carbon dioxide rich and, accordingly, the discovery of natural gas fields such as Solotvyno and carbon dioxide – such as Martovo. Hydrocarbon formation over a wide range of conditions and primary material ("oil polygenesis") allows the assessment of oil and gas resources of the region. A polygenetic approach for understanding hydrocarbon formation processes requires a changes in exploration strategy. More geochemical and thermobarometric research as well thermodynamic study of mineral-forming fluids is needed in promising geologic structures of the Transcarpathian gas-bearing area. This necessary, in order to predict possible occurrence of high-energy gas deposits and to determine areas for exploration.
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CURRENT STATE’S CONDITION OF LITHIUM ORE DEPOSITS IN UKRAINE A COMPARATIVE ANALYSIS OF DIAMONDS IN NON-KIMBERLITIC ROCKS OF THE WORLD AND NEOGENE SANDS OF UKRAINE GEOCHEMICAL CHARACTERISTICS OF THE SALTYCHIAN GRANITES (WESTERN AZOV AREA) ACCORDING TO THE ICP-MS RESEARCH RESULTS ECOLOGICAL AND GEOCHEMICAL FEATURES OF MANGANESE DISTRIBUTION IN GROUNDWATERS OF UKRAINE PUMPELLYITE FROM METABASALTS OF THE UKRAINIAN CARPATHIANS
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