Change search
Link to record
Permanent link

Direct link
BETA
Rasmussen, Thorkild MaackORCID iD iconorcid.org/0000-0002-1629-2920
Alternative names
Publications (10 of 30) Show all publications
Pal, M. K., Porwal, A. & Rasmussen, T. M. (2020). Noise reduction and destriping using local spatial statistics and quadratic regression from Hyperion images. Journal of Applied Remote Sensing, 14(1), Article ID 016515.
Open this publication in new window or tab >>Noise reduction and destriping using local spatial statistics and quadratic regression from Hyperion images
2020 (English)In: Journal of Applied Remote Sensing, ISSN 1931-3195, E-ISSN 1931-3195, Vol. 14, no 1, article id 016515Article in journal (Refereed) Published
Abstract [en]

Hyperion images from Earth Observing-1 (EO-1) are being used in natural resources assessment and management. The evaluation and verification of Hyperion images for the above applications are validating the EO-1 mission. However, the presence of random and striping noises in Hyperion images affect the accuracy of the results. Therefore, reduction of random noise and stripes from Hyperion images becomes indispensable for the evaluation of the results in natural resources assessment and in optimum use of the data. Thus, a collective approach for correcting pixels with no-data values and removing random noise and stripes from Hyperion radiance images is developed. In the developed method, first, no-data valued pixels are identified and corrected using a local median filter. Minimum noise fraction transformation is then used to reduce random noise from noise-dominated bands. Further, spatial statistical techniques are used to reduce random noise from the rest of the bands. Finally, a local quadratic regression by a least squares method is used to correct bad columns and global stripes, and a local-spatial-statistics-based algorithm is used to detect and correct local stripes. The effectiveness and efficiency of the algorithm is demonstrated by application to two Hyperion images: one from the Udaipur area, western India, and another from the Luleå area, northern Sweden. The results show that the algorithm reduces random and striping noise without introducing unwanted effects and alterations in the original normal data values in the images.

Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2020
Keywords
remote sensing, hyperspectral, Hyperion, minimum noise fraction, least-square regression, spatial statistics, spectral noise
National Category
Geophysics
Research subject
Exploration Geophysics
Identifiers
urn:nbn:se:ltu:diva-78314 (URN)10.1117/1.JRS.14.016515 (DOI)000520435000001 ()
Note

Validerad;2020;Nivå 2;2020-04-02 (alebob)

Available from: 2020-04-02 Created: 2020-04-02 Last updated: 2020-04-02Bibliographically approved
Pal, M., Rasmussen, T. & Porwal, A. (2020). Optimized Lithological Mapping from Multispectral and Hyperspectral Remote Sensing Images Using Fused Multi-Classifiers. Remote Sensing, 12(1), Article ID 177.
Open this publication in new window or tab >>Optimized Lithological Mapping from Multispectral and Hyperspectral Remote Sensing Images Using Fused Multi-Classifiers
2020 (English)In: Remote Sensing, ISSN 2072-4292, E-ISSN 2072-4292, Vol. 12, no 1, article id 177Article in journal (Refereed) Published
Abstract [en]

Most available studies in lithological mapping using spaceborne multispectral and hyperspectral remote sensing images employ different classification and spectral matching algorithms for performing this task; however, our experiment reveals that no single algorithm renders satisfactory results. Therefore, a new approach based on an ensemble of classifiers is presented for lithological mapping using remote sensing images in this paper, which returns enhanced accuracy. The proposed method uses a weighted pooling approach for lithological mapping at each pixel level using the agreement of the class accuracy, overall accuracy and kappa coefficient from the multi-classifiers of an image. The technique is implemented in four steps; (1) classification images are generated using a variety of classifiers; (2) accuracy assessments are performed for each class, overall classification and estimation of kappa coefficient for every classifier; (3) an overall within-class accuracy index is estimated by weighting class accuracy, overall accuracy and kappa coefficient for each class and every classifier; (4) finally each pixel is assigned to a class for which it has the highest overall within-class accuracy index amongst all classes in all classifiers. To demonstrate the strength of the developed approach, four supervised classifiers (minimum distance (MD), spectral angle mapper (SAM), spectral information divergence (SID), support vector machine (SVM)) are used on one hyperspectral image (Hyperion) and two multispectral images (ASTER, Landsat 8-OLI) for mapping lithological units of the Udaipur area, Rajasthan, western India. The method is found significantly effective in increasing the accuracy in lithological mapping.

Place, publisher, year, edition, pages
MDPI, 2020
Keywords
remote sensing, hyperspectral, multispectral, Hyperion, ASTER, Landsat 8-OLI, classification, lithological mapping
National Category
Geophysics
Research subject
Exploration Geophysics
Identifiers
urn:nbn:se:ltu:diva-78290 (URN)10.3390/rs12010177 (DOI)000515391700177 ()
Note

Validerad;2020;Nivå 2;2020-04-01 (johcin)

Available from: 2020-04-01 Created: 2020-04-01 Last updated: 2020-04-01Bibliographically approved
Darwesh, A., Rasmussen, T. M. & Al-Ansari, N. (2019). Controllable drilling parameter optimization for roller cone and polycrystalline diamond bits. Journal of Petroleum Exploration and Production Technology
Open this publication in new window or tab >>Controllable drilling parameter optimization for roller cone and polycrystalline diamond bits
2019 (Swedish)In: Journal of Petroleum Exploration and Production Technology, ISSN 2190-0558, E-ISSN 2190-0566Article in journal (Refereed) Epub ahead of print
Abstract [en]

Oil well drilling data from 23 oil wells in northern Iraq are analyzed and optimized controllable drilling parameters are found. The most widely used Bourgoyne and Young (BY) penetration rate model have been chosen for roller cone bits, and parameters were extracted to adjust for other bit types. In this regard, the collected data from real drilling operation have initially been averaged in short clusters based on changes in both lithology and bottom hole assemblies. The averaging was performed to overcome the issues related to noisy data negative effect and the lithological homogeneity assumption. Second, the Dmitriy Belozerov modifications for polycrystalline diamond bits compacts have been utilized to correct the model to the bit weight. The drilling formulas were used to calculate other required parameters for the BYM. Third, threshold weight for each cluster was determined through the relationship between bit weight and depth instead of the usual Drill of Test. Fourth, coefficients of the BYM were calculated for each cluster using multilinear regression. Fifth, a new model was developed to find the optimum drill string rotation based on changes in torque and bit diameter with depth. The above-developed approach has been implemented successfully on 23 oil wells field data to find optimum penetration rate, weight on bit and string rotation.

Place, publisher, year, edition, pages
Germany: Springer, 2019
Keywords
Bourgoyne and Young model, Clustering, Drilling, Multiple linear regression, Optimization
National Category
Geotechnical Engineering Geophysics
Research subject
Exploration Geophysics; Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-77274 (URN)10.1007/s13202-019-00823-1 (DOI)
Available from: 2020-01-01 Created: 2020-01-01 Last updated: 2020-03-05
Alakangas, L., Salifu, M., Rasmussen, T. M., Heino, N., Hyvönen, E., Karlsson, T., . . . Gogoi, H. (2019). Min-North: Development, Evaluation and Optimization of Measures to Reduce the  Environmental Impact of Mining Activities in Northern Regions. Luleå: Luleå University of Technology
Open this publication in new window or tab >>Min-North: Development, Evaluation and Optimization of Measures to Reduce the  Environmental Impact of Mining Activities in Northern Regions
Show others...
2019 (English)Report (Other academic)
Abstract [en]

The Min-North (Development, Evaluation and Optimization of Measures to Reduce the Environment Impact of Mining Activities in Northern Regions) project was a trans-national cooperative project, with participants from the Geological Survey of Finland (GTK), University of Oulu (UO), UiT The Arctic University of Norway (UiT), Luleå University of Technology (LTU) and SMEs from Sweden, Finland and Norway. The project was funded by Interreg Nord and Norrbottens länsstyrelse. The participants have expertise in mine waste management, mine water treatment and geophysics. The overall aim of the project was to enhance the development of environmental protection technologies. An associated goal was to deepen cross-border cooperation by creating a larger critical mass of researchers in mine waste management and local SMEs in the Northern regions with greater capacities to disseminate and implement new methods, products and services. The project ran for 36 months from the 1st of January 2016 to the end of December 2018.

 

Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2019. p. 68
Series
Research report / Luleå University of Technology, ISSN 1402-1528
Keywords
mine waste, dry cover, strontium isotopes, wetland
National Category
Geochemistry
Research subject
Applied Geochemistry
Identifiers
urn:nbn:se:ltu:diva-75722 (URN)978-91-7790-446-5 (ISBN)978-91-7790-447-2 (ISBN)
Projects
Min-North
Funder
Interreg Nord, NYPS 20200531v
Available from: 2019-08-28 Created: 2019-08-28 Last updated: 2019-11-22Bibliographically approved
Vadoodi, R., Rasmussen, T. M. & Smirnov, M. (2019). Regional magnetotelluric and potential field data analyses related to mineral exploration of the Fennoscandian Shield, Sweden. Paper presented at 2nd Australian Exploration Geoscience Conference: Data to Discovery. ASEG Extended Abstracts
Open this publication in new window or tab >>Regional magnetotelluric and potential field data analyses related to mineral exploration of the Fennoscandian Shield, Sweden
2019 (English)In: ASEG Extended Abstracts, ISSN 2202-0586Article in journal (Refereed) Epub ahead of print
Abstract [en]

Broadband magnetotelluric data were recorded at 104 sites between 2015-2018 in northern Sweden to image the geoelectrical upper and lower crustal structures. Data processing was performed using a robust multi-remote reference technique. The dimensionality analysis of the phase tensors indicate complex 3D structures in the area. A 3D crustal model of the electrical conductivity structure was derived based on 3D inversion of the data. Processing of regional potential field data was performed and structural information derived from these data were compared with the 3D conductivity model.

Locations of known mineralizations are compared to the regional geophysical data in order to investigate how the regional geophysical data can be used for better informed mineral exploration. The analyses indicate that regional geophysical can provide very useful information with respect to the prospectivity of different areas.

Place, publisher, year, edition, pages
Taylor & Francis, 2019
Keywords
Magnetotelluric, 3D inversion, potential fields, mineral exploration, Fennoscandian Shield
National Category
Geophysics
Research subject
Exploration Geophysics
Identifiers
urn:nbn:se:ltu:diva-77214 (URN)10.1080/22020586.2019.12073184 (DOI)
Conference
2nd Australian Exploration Geoscience Conference: Data to Discovery
Note

Konfrensartikel i tidskrift

Available from: 2019-12-18 Created: 2019-12-18 Last updated: 2019-12-18
Guarnieri, P., Brethes, A. & Rasmussen, T. M. (2017). Geometry and kinematics of the Triassic rift basin in Jameson Land (East Greenland). Tectonics, 36(4), 602-614
Open this publication in new window or tab >>Geometry and kinematics of the Triassic rift basin in Jameson Land (East Greenland)
2017 (English)In: Tectonics, ISSN 0278-7407, E-ISSN 1944-9194, Vol. 36, no 4, p. 602-614Article in journal (Refereed) Published
Abstract [en]

The Triassic rift basin along the east Greenland margin described in this paper is represented by NE-SW trending basins and highs segmented by NW-SE trending transfer zones. Coarse-grained sediments along the eastern side of Jameson Land are shown to be hosted in half-graben structures belonging to the Carlsberg Fjord Basin that is bounded by NW dipping normal faults mapped and described after fieldwork in the Klitdal area in Liverpool Land. New aeromagnetic and electromagnetic data together with new drill cores allow the reinterpretation of available seismic lines showing the continuation of the Triassic rift basin toward the SW where it is buried under the Upper Triassic postrift sediments and the Jurassic successions of the Jameson Land Basin. The N-S trending Liverpool Land, interpreted as the boundary block of the Triassic basin, is shown to represent a structural high inherited from the Late Carboniferous tectonics and faulted during the Triassic rifting. The Carlsberg Fjord Basin and the Klitdal Fault System described in this paper should be seen as analogues to the Helgeland Basin in the Norwegian offshore that is bounded by the Ylvingen Fault Zone and to the Papa and West of Shetlands Basins that are bounded by the Spine Fault. The Triassic rift zone and transfer faults on both conjugate margins show a straightforward correlation with the trends of the initial spreading line and fracture zones of the northeast Atlantic indicating a possible inheritance of the Triassic rifting

Place, publisher, year, edition, pages
American Geophysical Union (AGU), 2017
National Category
Geophysics
Research subject
Exploration Geophysics
Identifiers
urn:nbn:se:ltu:diva-62932 (URN)10.1002/2016TC004419 (DOI)000403718200001 ()2-s2.0-85017620952 (Scopus ID)
Note

Validerad; 2017; Nivå 2; 2017-05-19 (andbra)

Available from: 2017-04-07 Created: 2017-04-07 Last updated: 2018-11-07Bibliographically approved
Darwesh, A. K., Maack Rasmussen, T. & Al-Ansari, N. (2017). Kicks controlling techniques efficiency in term of time. Engineering, 9(5), 482-492
Open this publication in new window or tab >>Kicks controlling techniques efficiency in term of time
2017 (English)In: Engineering, ISSN 1947-3931, E-ISSN 1947-394X, Vol. 9, no 5, p. 482-492Article in journal (Refereed) Published
Abstract [en]

Kicks are the result of under balance drilling operation. Time consumed to control the kicks will be different in depending on the controlling technique. Drilling fluid considered as a first barrier to control formation pressure and well kicks. Any advance in drilling fluids leads to more controlled operation in term of time. This paper will follow the general increasing profile of pressure before entering the reservoir. Both methods of well controlling technique; circulating techniques and non-circulating have been implemented in many oil blocks. The process of designing and casing selection, setting depth and many other issues is predominately dependent on the utilization of accurate values of formation pressure. Formation pressures used to design safe mud weights to overcome fracturing the formation and prevent well kicks. Hence the emphasis has been placed on the practical utilization of kicks pressure near the reservoir. The presented relationships will help the engineer to better understand lithological columns and reduce potential hole problems during the kick appearance. Selecting the best well controlling practical method can lead to not harming the reservoir and more production later. Changes in some drilling fluid properties have been proposed with increasing the depth without damaging the reservoir. Suggestions in relation to the casing setting point of the intermediate section are also proposed. Standard equations with proper modification for gases and safety margin have been proposed for the future drilling operation in oil fields above the reservoir.

Place, publisher, year, edition, pages
Scientific Research Publishing, 2017
Keywords
Driller Technique, Engineer Technique, Drilling Fluid, Kicks, Reservoir
National Category
Geophysics Geotechnical Engineering
Research subject
Exploration Geophysics; Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-63554 (URN)10.4236/eng.2017.95028 (DOI)
Note

Validerad;2017;Nivå 1;2017-05-31 (rokbeg)

Available from: 2017-05-27 Created: 2017-05-27 Last updated: 2019-05-08Bibliographically approved
Darwesh, A. K., Rasmussen, T. M. & Al-Ansari, N. (2017). Time Optimizing near the Pay Zone. Engineering, 9(10), 848-858
Open this publication in new window or tab >>Time Optimizing near the Pay Zone
2017 (English)In: Engineering, ISSN 1947-3931, E-ISSN 1947-394X, Vol. 9, no 10, p. 848-858Article in journal (Refereed) Published
Abstract [en]

Well control techniques are used in oil and gas drilling operations to control bottom hole pressure and avoid any fluid influx from formation to the well. These techniques are highly important near the pay zone in term of time. Controlling formation fluid pressure and thereby the formations behavior in a predictable fashion will help toward more optimized environmental friendly drilling operation. Time consumed to control the formation fluid pressure will range between few hours to many days. This paper discusses hydrostatic pressure distribution and changes near the pay zone for one oil blocks in Kur- distan, in the northern part of Iraq. Obtaining homogeneous increase in some drilling fluid properties will help the engineer to better interpret sampling of the lithological columns and reduce potential hole problems and operationtime.

Place, publisher, year, edition, pages
Scientific Research Publishing, 2017
Keywords
Fluid Pressure, Well Control, Drilling Fluid, Formation, Pay Zone
National Category
Engineering and Technology Geotechnical Engineering Geophysics
Research subject
Exploration Geophysics; Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-66142 (URN)10.4236/eng.2017.910050 (DOI)
Note

Validerad;2017;Nivå 1;2017-10-19 (andbra)

Available from: 2017-10-16 Created: 2017-10-16 Last updated: 2020-03-05Bibliographically approved
Rasmussen, T. M. (2016). Current trends in geophysical exploration for minerals. In: : . Paper presented at 32nd Nordic Geological Winter Meeting in Helsinki, 13-15 January 2016.
Open this publication in new window or tab >>Current trends in geophysical exploration for minerals
2016 (English)Conference paper, Oral presentation with published abstract (Other academic)
Keywords
geofysik
National Category
Geophysics
Research subject
Exploration Geophysics
Identifiers
urn:nbn:se:ltu:diva-60809 (URN)
Conference
32nd Nordic Geological Winter Meeting in Helsinki, 13-15 January 2016
Available from: 2016-11-29 Created: 2016-11-29 Last updated: 2017-11-24Bibliographically approved
Tavakoli, S., Bauer, T., Rasmussen, T. M., Weihed, P. & Elming, S.-å. (2016). Deep massive sulphide exploration using 2D and 3D geoelectrical and induced polarization data in Skellefte mining district, northern Sweden (ed.). Geophysical Prospecting, 64(6), 1602-1619
Open this publication in new window or tab >>Deep massive sulphide exploration using 2D and 3D geoelectrical and induced polarization data in Skellefte mining district, northern Sweden
Show others...
2016 (English)In: Geophysical Prospecting, ISSN 0016-8025, E-ISSN 1365-2478, Vol. 64, no 6, p. 1602-1619Article in journal (Refereed) Published
Abstract [en]

Geoelectrical and induced polarization data from measurements along three profiles and from one 3D survey are acquired and processed in the central Skellefte District, northern Sweden. The data were collected during two field campaigns in 2009 and 2010 in order to delineate the structures related to volcanogenic massive sulphide deposits and to model lithological contacts down to a maximum depth of 1.5 km. The 2009 data were inverted previously, and their joint interpretation with potential field data indicated several anomalous zones. The 2010 data not only provide additional information from greater depths compared with the 2009 data but also cover a larger surface area. Several high-chargeability low-resistivity zones, interpreted as possible massive sulphide mineralization and associated hydrothermal alteration, are revealed. The 3D survey data provide a detailed high-resolution image of the top ∼450 m of the upper crust around the Maurliden East, North, and Central deposits. Several anomalies are interpreted as new potential prospects in the Maurliden area, which are mainly concentrated in the central conductive zone. In addition, the contact relationship between the major geological units, e.g., the contact between the Skellefte Group and the Jörn Intrusive Complex, is better understood with the help of 2010 deep-resistivity/chargeability data. The bottommost part of the Vargfors basin is imaged using the 2010 geoelectrical and induced polarization data down to ∼1-km depth.

National Category
Geophysics Geology
Research subject
Exploration Geophysics; Ore Geology
Identifiers
urn:nbn:se:ltu:diva-15251 (URN)10.1111/1365-2478.12363 (DOI)000386158100014 ()2-s2.0-84961572568 (Scopus ID)ebf80035-8141-4c62-94db-d97a3d1a5641 (Local ID)ebf80035-8141-4c62-94db-d97a3d1a5641 (Archive number)ebf80035-8141-4c62-94db-d97a3d1a5641 (OAI)
Note

Validerad; 2016; Nivå 2; 2016-11-21 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1629-2920

Search in DiVA

Show all publications