Hydrodynamic model application to create a reverse oil cone in water-oil zones

For the conditions of the development of bottom water-drive reservoirs in terrigenous deposits with low permeability of oil-saturated rocks in the dome of the formation, we propose a technology of reverse oil cone creating for effective residual oil reserves development. To visualize the oil recovery process, we created a hydrodynamic model, which makes it possible to increase the efficiency of the proposed technology, as well as to regulate the technology parameters. We considered the issues of the following models creating: the water cone formation during the near-roof part of the formation perforation; the a cone of oil formation in the process of water withdrawing from reservoirs with cutoff water saturation; erosion of the oil cone during its production from the interlayers with the highest oil saturation. The parameters influencing the efficiency of proposed reverse cone technology application are determined.

Kolegium pijarów w Chełmie. Historia – architektura – autorstwo

The building of the old College of Piarist in Chełm – located on Lubelska Street, near the late baroque Church of Holy Apostles the Messengers – is now the seat of the Wiktor Ambroziewicz Chełm Land Museum. Until now, it has not raised much interest among researchers and – appearing as a work of architecture devoid of expressive style features – has not been the subject of scientific reflection. This situation is changed by the disclosure of the preserved drawing from 1698, showing the building in a horizontal projection and axonometric view, stored in the Archivio Generale delle Scuole Pie in Rome. The information contained in written documents kept there allow to determine the time of construction of the building for the years 1698-1700. The project proves that the preserved edifice did not change substantially its one-story block, set on the plan of the letter H. The innovations concerned only the roof part over the main body, which was originally the Krakow roof, and the extension of one of the side wings in 1720-1724 (so that the college was connected to the church). Neither did the subsequent transformations significantly affect the internal divisions, be it in the two-and-a-half tract main corpus, with the cross-corridor communication system introduced therein, or in the single tract side wings. The shape of the building and the severity of the development of its facade, representing the baroque in its classicizing version, suggests the designer – Giuseppe Piola, an architect working in Warsaw at the turn of the 17th and 18th centuries, building, at the request of the Piarist order, also their church and monastery complex in Szczuczyn. However, the extension of the college wing made in the first half of the 18th century should probably be associated with the person of another capital architect – Carlo Antonio Bay, who at the same time, together with his son-in-law, Vincenzo Rachetti, also an architect, made calculations for the Piarist priests from Chełm for the profitability of their parcel located in the suburbs of the city of Lublin. The building in Chełm was a monastic college, and at certain times also a “profesorium”, in which Piarist clerics learned philosophy at a higher level of education. Contrary to some suggestions, there was never a public school run by the Piarists in this building. It was founded – as a Russian gymnasium – only after the January Uprising and the dissolution of the Scholarum Piarum community.

Geochemical Characteristics of the Bismuth and Antimony Occurrence in Some Coal Seams in the Lublin Coal Basin (LCB)

The study included 24 samples of coal with 7 cores, boreholes (7 coal seams), made by the Polish Geological Institute in Warsaw at the site of a Chelm field and 6 coal samples taken from 2 decks in the Lublin Coal mine „Bogdanka“ S.A. in LCB. Based on performed tests found generally low levels of Sb and Bi in coal. In the vertical profile of the LCB contents of Bi and Sb in coal generally increases from coal seams younger to older age. Content of Bi in coal from roof part coal seams is usually higher, and ash content in the coal content of Sb are generally lower than in the carbon of the middle part decks. The content of Bi in the lateral coal deposits is unlikely to vary, and the gap in the coal content of Bi between the sampling regions coal do not exceed 1.7 g / Mg. In contrast gap Sb content in coal on the extent LCB is from 1.7 g / Mg of 5.8 g / Mg. The biggest influence on the content of Bi and Sb in coal from the LCB is probably organic matter in which these elements are scattered and do not form their own minerals.

The Effect of Redistribution of the Mixing Water of the Concrete Lining on its Quality

In the heart of the processes of formation of physical and mechanical properties of secondary lining of underground structures is the residual water-cement ratio, which indicates the extraction of the mixing water of the concrete mixture under the action of external pressure forces. This article examines the nature of the redistribution of the mixing water in the concrete lining of the tunnels. Under the influence of radial and axial forces from laid concrete mix there is an increase in water-cement ratio in the direction from the sole to the vault head of the tunnel. This leads to deterioration of physical and mechanical properties of the lining in the roof part of the tunnel. When calculating the strength and water resistance of the secondary concrete tunnel lining the characteristics of the concrete type by strength and waterproof, adjusted by the weakest part of the lining – its roof part – should be taken into account. The analysis of influence on the technology of erection of the lining is given.

Motukoreaite from the Kłodawa Salt Dome, Central Poland

Motukoreaite, Mg6Al3(OH)18[Na(H2O)6][SO4]2·6H2O, is a poorly-known, rare layered double hydroxide mineral belonging to the wermlandite group in the hydrotalcite supergroup. It was found in abundant quantities (at least hundreds of thousands of Mt) in the roof part the Younger Potash unit of the Leine cyclothem on the Kłodawa Salt Dome in central Poland (Permian–Mesozoic basin of Central Europe), outside its known typical environments like altered basalts and basaltic tuffs, including those deposited in submarine volcanic areas. The mineral displays varying SO2–4, Na+ and H2O contents with negligible CO2–3, corresponding to the mean composition Mg5.75(Al3.20Fe3+0.04)∑3.25(OH)18.00{[Na(H2O)6]0.72□0.28}[(SO4)1.67(CO3)3.03(OH)0.57]·0.72H2O. It can be related to the partly dehydrated, hypothetical end-member Mg6Al3(OH)18[Na(H2O)6][(SO4)2]·6H2O. The Kł odawa motukoreaite represents the hexagonal, 3-layer polytype with the 3 × 3 superstructure in the xy plane, and unit cell a = b = 9.191(2)–9.199(2) Å, i.e. = 3 × 3.064–3.066 Å and c = 33.529(9)–33.562(7) Å, i.e. = 3 × 11.174–11.187 Å. The mineral was formed by alteration of clays delivered to the basin by an aeolian overprint and co-sedimented along with the evaporite sequence, initiated under the influence of Mg2+ - and SO2–4-bearing brines at temperatures not exceeding 160–200°C, released from the evaporites during diagenetic/metamorphic processes.

Flat Roof Defect: Preliminary Condition Survey for Water Ponding Monitoring

Roof is among defect-prone building part as it exposed to natural factor especially rainfall and sunlight. Thus, the inspection on roof part must be done more frequent compare to other parts of building. However, roof is the most difficult part to inspect because of limited access and safety concern. This paper presents the result of preliminary condition survey for water ponding monitoring on flat roof surface and discussion on the solving method. The survey has been carried out on flat roof of an academic building in Penang, Malaysia on a rainy day. Based on the condition survey, we found that water ponding occurs on some parts of the flat roof. Water ponding on flat roof will cause moisture problem that trigger severe problem on building. Since water ponding problem ineffectively do monitor by traditional method, we proposed to design an intelligent system to monitor water ponding problem on flat roof. By using an intelligent system, water ponding existence can be detected at a real-time. Furthermore, the system is time saving, manpower saving and the data can be manage systematically without the presence of surveyor on site.

A fuzzy decision making system for building damage map creation using high resolution satellite imagery

Recent studies have shown high resolution satellite imagery to be a powerful data source for post-earthquake damage assessment of buildings. Manual interpretation of these images, while being a reliable method for finding damaged buildings, is a subjective and time-consuming endeavor, rendering it unviable at times of emergency. The present research, proposes a new state-of-the-art method for automatic damage assessment of buildings using high resolution satellite imagery. In this method, at the first step a set of pre-processing algorithms are performed on the images. Then, extracting a candidate building from both pre- and post-event images, the intact roof part after an earthquake is found. Afterwards, by considering the shape and other structural properties of this roof part with its pre-event condition in a fuzzy inference system, the rate of damage for each candidate building is estimated. The results obtained from evaluation of this algorithm using QuickBird images of the December 2003 Bam, Iran, earthquake prove the ability of this method for post-earthquake damage assessment of buildings.