Geophysical characteristics and structural composition of clay rocks in the terrigenous complex of the southeastern part of the West Siberian oil and gas bearing pro

The basic attributes identifying the clay rock composition in the terrigenous complex of the southeastern part of the West-Siberian platform have been determined, based on the correlation of structural composition and geophysical data, including induced potential logging, apparent resistivity, induction logging, radioactive and caliper logging. According to the obtained results it is possible to identify above-mentioned rocks in well logs, even under conditions of limited core samples, their application in well log correlation and back stripping. Key words: geophysical well logging, the West-Siberian oil and gas bearing province, terrigenous complex, clay rocks, back stripping

Core acid treatment influence on well reservoir properties in Kazan oil-gas condensate field

The research involves investigation of the influence of hydrochloric acid (HCI-12%) and mud acid ( mixture: HCl - 10 % and HF - 3 %) treatment on the Upper-Jurassic reservoir properties in Kazan oil-gas condensate field wells. The sample collection included three lots of core cylinders from one and the same depth (all in all 42). Two lots of core cylinders were distributed as following: first lot - reservoir properties were determined, and, then thin sections were cut off from cylinder faces; second lot- core cylinders were exposed to hydrochloric acid treatment, then, after flushing the reservoir properties were determined, and thin sections were prepared. Based on the quantitative petrographic rock analysis, involvin 42 thin sections, the following factors were determined: granulometric mineral composition, cement content, intergranular contacts and pore space structure. According to the comparative analysis of initial samples, the following was determined: content decrease of feldspar, clay and mica fragments, mica, clay and carbonate cement; increase of pore spaces while in the investigated samples- on exposure of rocks to acids effective porosity and permeability value range is ambiguous

Pyritization effect on well logging parameters in Jurassic reservoirs within S-E Western Siberian oil fields

Authigenic sulfide mineralization in hydrocarbon-saturated reservoirs distorts the electrical and density properties of rocks. The correlation between volumetric density, electro-conductive minerals and open porosity in 300 samples were determined. This fact made it possible to develop a nomograph in evaluating oil saturated reservoirs and could be applied in well geophysical survey data interpretation

Core acid treatment influence on well reservoir properties in Kazan oil-gas condensate field

The research involves investigation of the influence of hydrochloric acid (HCI-12%) and mud acid ( mixture: HCl - 10 % and HF - 3 %) treatment on the Upper-Jurassic reservoir properties in Kazan oil-gas condensate field wells. The sample collection included three lots of core cylinders from one and the same depth (all in all 42). Two lots of core cylinders were distributed as following: first lot - reservoir properties were determined, and, then thin sections were cut off from cylinder faces; second lot- core cylinders were exposed to hydrochloric acid treatment, then, after flushing the reservoir properties were determined, and thin sections were prepared. Based on the quantitative petrographic rock analysis, involvin 42 thin sections, the following factors were determined: granulometric mineral composition, cement content, intergranular contacts and pore space structure. According to the comparative analysis of initial samples, the following was determined: content decrease of feldspar, clay and mica fragments, mica, clay and carbonate cement; increase of pore spaces while in the investigated samples- on exposure of rocks to acids effective porosity and permeability value range is ambiguous

Predicted facies, sedimentary structures and potential resources of Jurassic petroleum complex in S-E Western Siberia (based on well logging data)

This paper is devoted to the current problem in petroleum geology and geophysics- prediction of facies sediments for further evaluation of productive layers. Applying the acoustic method and the characterizing sedimentary structure for each coastal-marine-delta type was determined. The summary of sedimentary structure characteristics and reservoir properties (porosity and permeability) of typical facies were described. Logging models SP, EL and GR (configuration, curve range) in interpreting geophysical data for each litho-facies were identified. According to geophysical characteristics these sediments can be classified as coastal-marine-delta. Prediction models for potential Jurassic oil-gas bearing complexes (horizon J[1]{1}) in one S-E Western Siberian deposit were conducted. Comparing forecasting to actual testing data of layer J[1]{1} showed that the prediction is about 85%

Stratigraphy and correlation of Lower-Middle Jurassic sediments in SE West-Siberian petroleum-bearing province

Based on the investigation of Lower-Middle Jurassic sediments in SW Siberia, isochron reference clay and coal horizons confined to the roof of chronostratigraphic units were identified; bed series from pre-Jurassic formation bottom to U[10] coal layer were divided; structural features and distribution of regional cyclites J[10]-J[17] in the sequences and throughout the area were determined

The potential of information technologies in the use of paintings in the learning process

The report focuses on how information technology can enhance the cognitive effect when you turn on the scenic heritage in the process of teaching different subjects (e.g. history) and to enhance interdisciplinary connectionsДоклад посвящен тому, как информационные технологии позволяют усиливать познавательный эффект при включении живописного наследия в процесс обучения различным предметам (к примеру, истории) и расширять межпредметные связ

The microbial composition of vaginal HIV-infected women, (literature review)

Almost halfof new HIV infections worldwide occur in women, and vaginal intercourse is the most common mode of transmission. Experimental and clinical studies have provided evidence that the normal vaginal microbiota plays a protective role against acquisition of HIV and other sexually transmitted infections. Epidemiological studies have convincingly shown that disturbances of the vaginal microbiome, namely intermediate flora and bacterial vaginosis, increase the risk of acquisition of HIV infection.Почти половина новых случаев ВИЧ-инфекций во всем мире приходится на женщин, и половой путь передачи является в последнее время наиболее распространенным. В обзоре представлены результаты экспериментальных и клинических исследования, доказывающих, что нормальная вагинальная микрофлора играет защитную роль против заражения ВИЧ. Эпидемиологические исследования убедительно показали, что нарушения вагинального микробиомома, а именно наличие промежуточной флоры и бактериального вагиноза, увеличивают риск приобретения ВИЧ-инфекции

Features of intensive organ-sparing therapy for massive postpartum hemorrhage

Bleeding in pregnancy, childbirth and the postpartum period is one of the leading causes of maternal morbidity and mortality worldwide. There is no doubt that obstetric bleeding demands the development of improved methods for its diagnostics and treatment. We assessed the effectiveness of the treatment strategy for massive postpartum hemorrhage (PPH) with preservation of reproductive function, applied in the Perinatal Center of Irkutsk. We performed a retrospective analysis of 24 delivery cases, complicated by massive bleeding and successfully treated with preservation of reproductive organs. The massive nature of bleeding (> 30 % of blood volume) was registered in 15 (62.5 %) cases, mild (> 20 % bu