Geoinformatica Polonica最新文献

{"title":"GPR Signal Analysis for the Exploration of Loose Zones in the Near Surface Underground","authors":"T. Gołębiowski","doi":"10.4467/21995923gp.23.002.18601","DOIUrl":"https://doi.org/10.4467/21995923gp.23.002.18601","url":null,"abstract":"In the paper, non-standard signal and image processing applied for the GPR (Ground Penetrating Radar) data record for various \u0000antennae orientations was presented and discussed. The terrain surveys were carried out in the post-mining region in Poland where \u0000numerous sinkholes and subsidence areas were observed on the surface due to the former mining activity. The GPR surveys \u0000were conducted between two existing sinkholes and the aim of measurements was detection of loose zones in the ground created \u0000by suffosion process which caused the formation of the mentioned two sinkholes. In the paper, the Author proposed a new way \u0000of processing and analysis of radargrams based on three steps, i.e. 1D more advanced processing of signals/traces, 2D more \u0000advanced image processing of combined radarogram, visualisation and analysis of selected signal attributes.","PeriodicalId":137315,"journal":{"name":"Geoinformatica Polonica","volume":" 104","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138620519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphometric Parameters of the Water Bodies of Bagry Wielkie and Bagry Małe in the Biodiversity Context","authors":"R. Gawałkiewicz, Aleksandra Wagner","doi":"10.4467/21995923gp.23.003.18602","DOIUrl":"https://doi.org/10.4467/21995923gp.23.003.18602","url":null,"abstract":"The article presents the results of nature-based and geodetic query of two neighbouring endorheic borrow pits, i.e., Bagry Wielkie and Staw Płaszowski (Bagry Małe), situated almost in the centre of the Krakow city. The movements of water tables in 2016–2023 were observed (from the moment of ecological disaster in the Staw Płaszowski, in February 2016) and bathymetric maps were presented.\u0000 \u0000Based on geodetic measurements carried out in 2016–2022 and direct observations of nature, documenting biodiversity of both reservoirs in 2019–2022, the authors reviewed the state of biosphere in this location. Surveying, observations and interviews allowed parameterization of both water bodies (morphometric data and bathymetric maps) and creating up-to-date database\u0000(location on maps, qualitative and quantitative elements of flora and fauna). The material makes base for further studies with the application of more advanced photogrammetric technologies and UAV technologies, which can make data contained in this publication more accurate.","PeriodicalId":137315,"journal":{"name":"Geoinformatica Polonica","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138609710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Analysis of the Accuracy of the Transformation of the Coordinators of Mining Maps by Distinct Method","authors":"M. Żogała","doi":"10.4467/21995923gp.23.004.1860310.4467/","DOIUrl":"https://doi.org/10.4467/21995923gp.23.004.1860310.4467/","url":null,"abstract":"The article presents the results of an analysis of the accuracy of the transformation of the coordinates of the boundary points of neighbouring mining areas in Silesia. The transformations were carried out independently for each mining area caused the equivalent boundary points of neighbouring mining areas in the local coordinate system to have different coordinates in the national PL-2000 system. In addition, analyses were carried out taking into account measurement accuracy confirming the sensitivity of the first order conformal transformation to measurement errors. The differences that occur indicate the need to look for a method that will reduce or eliminate them.","PeriodicalId":137315,"journal":{"name":"Geoinformatica Polonica","volume":" 26","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138612516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial Variability of Average Annual and Monthly Minimum River Flow in Poland","authors":"K. Baran-Gurgul, Katarzyna Kołodziejczyk, Agnieszka Rutkowska","doi":"10.4467/21995923gp.23.001.18600","DOIUrl":"https://doi.org/10.4467/21995923gp.23.001.18600","url":null,"abstract":"The aim of this article is to analyse the spatial variability of SNQ, the average annual minimum river flow, as well as SNQm (m = 1, 2, …12), the average monthly minimum river flow in Poland.\u0000\u0000The data were obtained from the Institute of Meteorology and Water Management – National Research Institute (IMWM-NRI) in the form of the daily flow series from the period between 01 Nov 1990 and 31 Oct 2020 from 433 gauging cross-sections located within the territory of Poland. The results of the analyses are presented on maps of the physiographic regions of Poland (the Coastlands, the Lakelands, the Lowlands, the Highlands, the Carpathians and the Sudety Mountains).\u0000\u0000In order to compare SNqm – the unit average minimum monthly flow between the physiographic regions, the Kruskal-Wallis test with the Dunn (Bonferroni) adjustment was performed. In order to evaluate the spatial variability of the SNqm, the hypothesis was verified for each gauging station that the Spearman correlation coefficient between the SNqm and the zero point of the gauge was different from zero.\u0000\u0000The SNqm flow changed over the year. As expected, the highest values were observed in March and April, and the lowest in July and August. Regardless of the month, the rivers in the central part of Poland (the Lowlands) were less water abundant than those in other regions of the country while the greatest flows were observed in the mountain rivers.\u0000\u0000Statistically, no difference was observed between the SNqm in the Coastlands, the Carpathians and the Sudety Mts., and in nearly all of the months between the SNqm in the Lakelands and the Lowlands.\u0000\u0000In the whole territory of Poland, the river flow was dependent on the altitude of the catchment, while the strongest correlation was observed in the mountain regions.","PeriodicalId":137315,"journal":{"name":"Geoinformatica Polonica","volume":"136 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138621557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Iterative Approach to the Area Collapse Algorithm for 2D Geometric Objects Representing Long Engineering Structures","authors":"Michał M. Buczek","doi":"10.4467/21995923gp.23.005.18604","DOIUrl":"https://doi.org/10.4467/21995923gp.23.005.18604","url":null,"abstract":"Nowadays the amount of gathered raw data emphasizes the importance of further data processing done by skilled engineers aided by computer algorithms. Researchers develop new algorithms for the automated determination of geometrical features, such as symmetry and main axes, skeleton lines, etc. This paper presented a new algorithm to compute an unbranched axis. It was based on the Curve of Minimal Radii (CMR) algorithm, and it overcomes its significant limitations depending on the shape of the input data. To define the accuracy of the results the threshold parameter was introduced. The described approach is more comprehensive than CMR in terms of the object shape. The tests were conducted on several planar objects, and the results were compared with the original CMR axes and Medial Axis.","PeriodicalId":137315,"journal":{"name":"Geoinformatica Polonica","volume":" 47","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138613500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Space-Time Analysis of Strongholds in the Southern Section of the Polish-Ruthenian Borderland with Particular Emphasis on Carpathian Centers, Research Using GIS Tools","authors":"Cyryl Konstantinovski Puntos, M. Luc","doi":"10.4467/21995923gp.22.007.17085","DOIUrl":"https://doi.org/10.4467/21995923gp.22.007.17085","url":null,"abstract":"The article contains the findings of geoarchaeological research conducted by means of geoinformatics, related to various aspects of territory occupied in early Middle Ages by the so-called Cherven Towns. The issues presented in the publication concern the complex aspect of the borderland between Poland and the Rurik Rus during the formation of these two monarchies. The main objectives include: presenting the diverse time of strongholds’ use over the centuries within the early medieval borderland of south-eastern Poland, demonstrating the relationships between them, as well as visualizing the research findings by means of geoinformatics tools, based on geoarchaeological data. The article presents maps and visualizations that can help understand how medieval societies functioned. These maps and visualizations have been developed by means of GIS and graphical software. Data was verified by means of field research carried out in 2021 directly on the selected fortified settlements. The result comprises a variety of maps and models. The main outcome of the research is a mapped diversification of the termination of existence of the discussed defensive structures, for example, in the Wiar river catchment, which took place from the 11th century, near Sanok, until the 13th/14th century. This indicates a change in the defense strategy of these areas within the quoted territory of influence of medieval Poland and Rus, including within the range of the Carpathian arch.\u0000\u0000CZASOPRZESTRZENNA ANALIZA FUNKCJONOWANIA GRODÓW NA POŁUDNIOWYM ODCINKU POLSKO-RUSKIEGO POGRANICZA, ZE SZCZEGÓLNYM UWZGLĘDNIENIEM OŚRODKÓW KARPACKICH, BADANIA Z WYKORZYSTANIEM NARZĘDZI GIS\u0000\u0000Artykuł zawiera rezultaty badań geoarcheologicznych prowadzonych metodami geoinformatycznymi, dotyczących szeroko rozumianego terytorium zajmowanego przez tzw. Grody Czerwieńskie we wczesnym średniowieczu. Publikacja dotyczy złożonego aspektu pogranicza Polski i Rusi Rurykowiczów w trakcie tworzenia się tych dwóch monarchii. Głównymi celami opracowania są: ukazanie zróżnicowania czasu korzystania z ośrodków grodowych na przestrzeni wieków na obszarze wczesnośredniowiecznego pogranicza południowo-wschodniej Polski, przedstawienie relacji jakie zachodziły pomiędzy nimi oraz zwizualizowanie otrzymanych wyników badań za pomocą narzędzi geoinformatycznych, na podstawie danych geoarcheologicznych. W opracowaniu przedstawiono mapy i wizualizacje, które mogą pomóc zrozumieć, jak funkcjonowały społeczności wieków średnich. Do ich opracowania zastosowano narzędzia GIS i programy graficzne. W celu weryfikacji danych, w 2021 r. przeprowadzono badania terenowe bezpośrednio na wybranych grodziskach. W rezultacie opracowano szereg map i modeli. Głównym wynikiem przeprowadzonych badań jest wskazanie zróżnicowania czasu zakończenia istnienia omawianych obiektów obronnych – przykładowo w zlewni rzeki Wiar miało to miejsce do XI wieku, nieopodal Sanoka do XIII/XIV wieku. Świadczy to o zmianie strategii obrony danych terenów w ","PeriodicalId":137315,"journal":{"name":"Geoinformatica Polonica","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125395763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review of Solar Energy Applications for Water Treatment; a Global and African Perspective","authors":"V. Fagorite, Damian Ifeanyi Njoku, H. O. Oluwasola, S. Onyekuru, E. Oguzie","doi":"10.4467/21995923gp.22.005.17083","DOIUrl":"https://doi.org/10.4467/21995923gp.22.005.17083","url":null,"abstract":"Solar energy is energy derived from the sun’s radiation. The sun’s energy can be exploited using a variety of technologies, including (a) photovoltaic (PV)/concentrator photovoltaics (CPV) systems that convert photons to electricity; and (b) solar thermal technologies that capture thermal energy from the sun’s radiation using solar collectors or concentrated solar power systems (CSP). Due to the quest for power supply from renewable, cheap, and non-gaseous emission sources coupled with the attempts to combat the shortage of potable water in rural areas, much research on the interface of solar energy power systems with water treatment plants has been reported. However, the greater part of the existing reports are based on theoretical modelling, with only minimal experimental, cost analysis, pilot projects and strategic studies. Also, even though solar-powered water treatment technologies are still in the early stages of research, and very rare studies based on real plants have been conducted, existing publications are mostly focused on single principles, making it impossible to assess and compare several technologies. Globally, this review has particularly highlighted the recent advances in the application of solar energy technologies in desalination and wastewater treatments. It likewise highlighted the key research findings and the critical gaps in the existing achievements. It further highlighted the attempts made on hybrid techniques with other renewable energy sources such as wind and geothermal energies which are paramount for scaling up and commercialization uses. However, the findings revealed that most of these studies were restricted to particular parts of the globe without candid evidence from the African perspective, especially Sub-Saharan Africa. Thus, due to the paucity of information concerning this topic within the region, there is a need for further studies on the application of solar energy for water treatment, especially on a pilot scale level for sustainable development.\u0000\u0000PRZEGLĄD ZASTOSOWAŃ ENERGII SŁONECZNEJ DO OCZYSZCZANIA ŚCIEKÓW; PERSPEKTYWA GLOBALNA I AFRYKAŃSKA\u0000\u0000Energia pochodząca z promieniowania słońca może być eksploatowana przy użyciu różnorodnych technologii, w tym (a) fotowoltaiki (PV)/skoncentrowanej fotowoltaiki (CPV), systemów, które przekształcają fotony w energię elektryczną; i (b) słoneczne technologie cieplne, które wychwytują energię cieplną z promieniowania słonecznego przy pomocy kolektorów słonecznych lub skoncentrowanych systemów energii słonecznej (CSP). Z powodu poszukiwań dostaw energii ze źródeł odnawialnych, tanich i nie emitujących zanieczyszczeń gazowych, a także wysiłków na rzecz walki z niedoborem wody pitnej w obszarach wiejskich, opublikowano wiele badań na temat systemów pozyskiwania energii słonecznej dla obsługi oczyszczalni ścieków. Jednakże większość istniejących opracowań oparta jest o modelowanie teoretyczne, jedynie z minimalną częścią eksperymentalną, analizą kosztów, projektami pilo","PeriodicalId":137315,"journal":{"name":"Geoinformatica Polonica","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130525169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Qualitative Relationship of Seismic Activity with Vertical Displacements of Terrain After Mine Closure with the Use of Dinsar Technology","authors":"P. Sopata, Violetta Sokoła-Szewioła","doi":"10.4467/21995923gp.22.006.17084","DOIUrl":"https://doi.org/10.4467/21995923gp.22.006.17084","url":null,"abstract":"The liquidation process of mines is very complex and long. It relates to various hazards, including post-mining seismicity and deformations of ground surface. The above issues are the subject of the research project under which the monitoring of ground surface movements is carried out in the area of the closed coal mine “Kazimierz-Juliusz”, which is currently being flooded. The monitoring is carried out using the GNSS technique and satellite radar interferometry (InSAR). The project makes use of radar data from the Copernicus project, which is being implemented by the European Commission in cooperation with the European Space Agency (ESA). InSAR monitoring started in December 2020. Additionally, we analyzed the impact on ground surface of 5 rock tremors of the energy not exceeding 6.5E + 05 J (tremor magnitude Mw = 2.1), which were reported in the investigated area in 2018–2020. The article presents the results of qualitative analysis involving the relationship between seismic activity and vertical movements of ground surface. To investigate potential changes in altitude, DInSAR technology was applied. On the basis of interferometric images generated from radarograms in the periods before and after the tremor, in January 2019, it was found that vertical movements of ground surface were possible to occur. Altitude changes can be characterized with the values in the range of single millimeters, which are only slightly beyond the accuracy range of the InSAR method. The analysis of interferograms, comprising wider time databases, indicated that the impact of the tremor on the deformations of ground surface is incidental.\u0000\u0000ZWIĄZKI JAKOŚCIOWE AKTYWNOŚCI SEJSMICZNEJ Z PRZEMIESZCZENIAMI PIONOWYMI TERENU PO ZAMKNIĘCIU KOPALNI Z WYKORZYSTANIEM TECHNOLOGII DInSAR\u0000\u0000Proces likwidacji kopalń jest bardzo złożony i długotrwały. Towarzyszą mu różne zagrożenia, wśród których można wymienić sejsmiczność pogórniczą oraz deformacje powierzchni terenu. Problematyka ta jest przedmiotem projektu badawczego, w ramach którego wykonywany jest monitoring ruchów powierzchni na terenie nieczynnej już kopalni „Kazimierz-Juliusz”, która jest obecnie zatapiania. Monitoring realizowany jest z wykorzystaniem techniki GNSS oraz satelitarnej interferometrii radarowej (InSAR). W projekcie wykorzystywane są dane radarowe z projektu Copernicus, który realizowany jest przez Komisję Europejską we współpracy z Europejską Agencją Kosmiczną (ESA – European Space Agence). Monitoring techniką InSAR rozpoczęto w grudniu 2020 roku. Dodatkowo przeanalizowano powierzchniowe skutki pięciu wstrząsów górotworu o energii nieprzekraczającej wartości 6,5E+05 J (magnituda wstrząsu Mw = 2,1), które zarejestrowano w rejonie badań w latach 2018–2020. W artykule przedstawiono wyniki analizy jakościowej związków aktywności sejsmicznej z ruchami pionowymi powierzchni terenu. W celu zbadania potencjalnych zmian wysokościowych wykorzystano technologię DInSAR. Na podstawie obrazów interferometrycznych wygenerowa","PeriodicalId":137315,"journal":{"name":"Geoinformatica Polonica","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117214718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Degradation of Environment by Ajanta Tourism Centre in Maharashtra, India","authors":"Dnyaneshwar. S. Suryawanshi, Vivekananda D. Patil","doi":"10.4467/21995923gp.22.004.17082","DOIUrl":"https://doi.org/10.4467/21995923gp.22.004.17082","url":null,"abstract":"Tourism has become one of the important sectors and plays an important role in overall development of the country. This sector reflects many socio-cultural aspects as well as identity of the country. But tourism industry is directly related to the environment. The qualities of environment depends on natural and man-made factors of tourism. The positive and negative impacts of tourism on environment are the objective of this study. The study has been conducted mainly on the basis of literature survey, primary interviews and secondary data. Various seminars, papers, summary of the discussion, government reports and research journals on environmental impacts of tourism have been surveyed for the purpose of the study. Data depend on tested methods of surveys and interviews of tourists, houses, businessmen and people of the surrounding tourism center. Out of the total houses and people of Ajanta 5 percent sampling was taken to survey in January 2020. However, more rapid development is responsible to the degradation of the place. At Ajanta tourist centre, 28.33 percent of the people agreed in favor of discouraging the growth of tourists. 39.17 percent of the people the growth of tourism which is detrimental to the environment are discouraging tourism. But 18.33 percent of the people disagreed that, rapid growth of tourists degrades the environment. But awareness of tourists and government agencies are about tourism industry positively impact or negative on environment at Ajanta.\u0000\u0000DEGRADACJA ŚRODOWISKA SPOWODOWANA PRZEZ OŚRODEK TURYSTYCZNY AJANTA W MAHARASHTRA, INDIE\u0000\u0000Turystyka stała się jednym z ważnych sektorów i odgrywa ważną rolę w ogólnym rozwoju kraju. Sektor ten odzwierciedla wiele aspektów społeczno-kulturowych kraju i jego tożsamość. Ale przemysł turystyczny jest bezpośrednio związany ze środowiskiem. Cechy środowiska zależą od naturalnych i antropogenicznych uwarunkowań turystyki. Przedmiotem badań jest pozytywny i negatywny wpływ turystyki na środowisko. Badania prowadzono głównie na podstawie przeglądu literatury, bezpośrednich wywiadów oraz danych otrzymanych pośrednio. W pracy wykorzystano różnorodne źródła: seminaria, artykuły, wnioski z dyskusji, raporty rządowe i czasopisma naukowe, na temat oddziaływaniu turystyki na środowisko. Dane opierają się na sprawdzonych metodach badań i wywiadów z turystami, właścicielami domów, przedsiębiorcami i ludźmi związanymi z ośrodkiem turystycznym. W styczniu 2020 r., spośród ogólnej liczby domów i mieszkańców Ajanty, do badań włączono 5%. Jednakże bardziej gwałtowny rozwój odpowiada za degradację środowiska. W ośrodku turystycznym Ajanta 28,33% osób zgodziło się z tym, że powinno się zniechęcać do dalszego wzrostu liczby turystów. Aż 39,17% osób uważa wzrost turystyki za szkodliwy dla środowiska i zniechęca do rozwoju turystyki. Ale 18.33% osób nie zgadza się z tym, że gwałtowny rozwój turystyki szkodzi środowisku. Świadomość turystów i agencji rządowych na temat przemysłu turystycznego mogą wpływać ","PeriodicalId":137315,"journal":{"name":"Geoinformatica Polonica","volume":"218 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129801949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prediction of Litho-Porosity Using Incompressibility and Rigidity, Offshore Niger Delta, Nigeria","authors":"E. Nwokoma, O. Agbasi, O. C. Dinneya","doi":"10.4467/21995923gp.22.003.17081","DOIUrl":"https://doi.org/10.4467/21995923gp.22.003.17081","url":null,"abstract":"The computed velocity ratio and Poisson’s ratio were used to calculate the pore fluid and lithology content. The gas sand, oil sand, and brine sand were identified using velocity ratio and Poisson’s ratio analyses. The velocity ratio and Poisson’s ratio study supported the gas sand anticipated by the rock physics analysis using lambda-mho and mu-rho. The velocity ratio and Poisson’s ratio analyses were used to better define the wet sand anticipated by the lambda-mho and mu-rho rock physics analyses. Lithology and pore fluid determination are very essential for the exploration and production of hydrocarbons. The wet sand from the rock physics analysis of lambda-mho and mu-rho was predicted to comprise oil sand and brine sand. The value of lambda-mho is between 21.74 and 25.67; for mu-rho is between 16.34 to 23.21; for Poisson’s ratio is between 0.25 to 0.29; and for Vp/Vs ratio is between 1.74 to 1.83. These confirm the presence of oil sand in all the seven (7) reservoirs studied in two (2) wells. All the reservoirs fall between the Agbada region (10212.50 – 11741.00 ft) and have a very good net pay zone ranging from 41.50 ft to 193.00 ft in the Niger Delta region, Nigeria. The obtained velocity ratio and Poisson’s ratio were used to calculate the pore fluid content. The gas sand, oil sand, and brine sand were identified using velocity ratio and Poisson’s ratio analysis. The velocity ratio and Poisson’s ratio studies supported the gas sand anticipated by the rock physics analysis using lambda-mho and mu-rho. The velocity ratio and Poisson’s ratio analyses were used to better define the wet sand anticipated by the lambda-mho and mu-rho rock physics analyses. The moist sand anticipated by the rock physics studies of lambda-mho and mu-rho was oil sand and brine sand.\u0000\u0000PRZEWIDYWANIE POROWATOŚCI SKAŁ NA PODSTAWIE BADAŃ NIEŚCIŚLIWOŚCI I SZTYWNOŚCI W DELCIE RZEKI NIGER, NIGERIA\u0000\u0000Do obliczenia zawartości płynu porowego i zbadania litologii zastosowano współczynnik prędkości i współczynnik Poissona. Piaski gazonośne, roponośne i solankonośne zidentyfikowano na podstawie analizy współczynnika prędkości i współczynnika Poissona. Badania w oparciu o współczynnik prędkości i współczynnik Poissona potwierdziły występowanie piasku gazonośnego, na co wskazywała analiza właściwości fizycznych przy użyciu lambda-mho i mu-rho. Analizy współczynnika prędkości i współczynnika Poissona zastosowano dla lepszego zdefiniowania piasku mokrego przewidzianego przez analizy właściwości fizycznych skały za pomocą lambda-mho i mu-rho. Określenie litologii oraz zawartości płynu porowego jest bardzo ważne w procesie poszukiwania i pozyskiwania węglowodorów. W wyniku analizy właściwości fizycznych skały za pomocą lambda-mho i mu-rho przewidziano, że piasek mokry zawiera piaski roponośne i solankonośne. Wartość lambda-mho waha się pomiędzy 21,74 a 25,67; a wartość mu-rho wynosi 16,34 – 23,21; współczynnik Poissona ratio wynosi 0,25 – 0,29; a Vp/Vs waha się pomiędzy 1,74 a 1,83. Pot","PeriodicalId":137315,"journal":{"name":"Geoinformatica Polonica","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128435054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}