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Collaborating Authors
Search Industry: Acknowledgements
Abstract Most formation evaluation measurements like neutron, density and resistivity, can be influenced by the drilling fluid and by mud filtrate solids. The severity of fluid invasion is mainly a result of the type of mud and the depth of investigation of the individual measurements. Wireline (WL) operations often occur days after drilling a section of a well, and the invasion of mud filtrate into the formation can be significant, making fluid saturation profiles difficult to interpret. Logging-whiledrilling (LWD) acquired data are less affected by invasion because the data are acquired in a close-to virgin formation condition. However, in addition to the impact of invasion, resistivity can be affected by โartifactsโ like the presence of conductive or resistive minerals in the formation. These minerals can lead to misinterpretations that affect conventional saturation calculations. For exploration drilling, nuclear magnetic resonance (NMR) is often used to obtain an independent fluid saturation profile for comparison with conventional petrophysical data. However, NMR is a very shallow measurement, and differentiating between hydrocarbons in place and oil-based mud filtrate invasion can be very difficult if fluid signatures are similar, even when using 2D NMR. In such situations an independent source of information is vital to separate between formation fluid and the borehole fluid invasion effect. A vertical exploration well located in the Norwegian Sea was drilled to TD at 4025m. The primary target was the Early-Middle Jurassic Fangst and Bรฅt Gps reservoirs deposited in a shallow marine-to-deltaic environment. Reservoir quality was relatively low with average porosity of 14% and maximum of 20%, and permeability was in the range of >1โ10 mD. The secondary target was a pinch-out trap in the Cretaceous Lange formation, consisting of thin sands deposited in a marine environment. Porosities were similar to the Jurassic formations, however permeabilities up to 200 mD were seen from sidewall cores. This paper presents a case where conventional petrophysical evaluation based on basic formation evaluation data from LWD and WL is compared to the results from 2D nuclear magnetic resonance-based fluid saturations. Mineralogical information to aid in the interpretation of the conventional data was derived using neutron-induced gamma ray spectroscopy. The validity of the analysis was evaluated using a new approach to interpret surface logging gas data, based on C1 up to C5 including the isomers of butane and pentane, which are totally independent and not influenced by filtrate invasion. Using this technique, a high-resolution hydrocarbon type and distribution log was created to prove the presence of hydrocarbons in place.
- Geology > Geological Subdiscipline (1.00)
- Geology > Mineral (0.86)
- Geology > Sedimentary Geology > Depositional Environment > Transitional Environment > Deltaic Environment (0.54)
- Europe > Norway > Norwegian Sea > Dรธnna Terrace > PL 159 > Block 6507/3 > Alve Field > Tofte Formation (0.99)
- Europe > Norway > Norwegian Sea > Dรธnna Terrace > PL 159 > Block 6507/3 > Alve Field > Tilje Formation (0.99)
- Europe > Norway > Norwegian Sea > Dรธnna Terrace > PL 159 > Block 6507/3 > Alve Field > Not Formation (0.99)
- (10 more...)
...3. Conclusions Acknowledgements References 2011 2011 1994...
Abstract Non explosive demolition agent (NEDA) is material that can produces static expansive stress during its chemical reaction. It can be an alternative method to changing of blasting role as rock cutter in hard rock mine. The important parameter to determine hole spacing are static expansive pressure by NEDA, rock properties, and borehole diameter. A laboratory experimental were conduct to assess the pressure gain until the maximum expansive pressure by using electrical strain gauge and dial gauge with using some sample with three differences diameter (ร) with same height (10cm). Then, NEDA were use in larger sample as the physical model test (25cm ร 45 cm ร 45 cm), to assess the length of rock fracturing and monitor the crack growth with time considering. In case of laboratory experimental to determine hole spacing, some empirical equation and physical model result were employed to do some preliminary experimental. The differences of hole diameters and spacing and static expansive pressures were analyzed. Hence, the result of preliminary test were developed by statistical analysis using polynomial regression method. Then, by employed RS3 code as numerical modeling based on 3D finite element method the developed equation will be compared and validated. The developed statistical models were shown a good fitting with Finite Element analysis. Hence, the developed models can be used with confidence to determine hole spacing into rock fracturing. 1. Introduction Mining industry in Indonesia was growth rapidly especially in quarry mine, like marble, granite, andesite, etc., but for excavation method, still use conventional method like diamond wire saw, and also blasting. Expansive mortar is an inorganic material that produces pressure that is expansive (expands) caused by hardening of the paste in the hydration process resulting in a tensile stress caused by shrinkage of chemical elements (odler, 2000). Expansive mortar is also one of the effective methods that can be used to breakage or cut the rock. Expansive mortar is widely used in the mining industry and civil construction.
...3. Conclusion Acknowledgements References...
Abstract Mechanical rock breaking methods have been used since a long time in many activities within both mining industries and civil industries. One of cutting tools that are used on mechanical excavation equipment is a drag pick. This research paper will discuss mechanical rock breakage using drag pick as an extension of former research that is similar to present study that used a small scale cuttability test machine with 0,5 cm depth of cutting and 1,5 cm width of cutting tools conducted by Novandika (2014) and a full-scale cuttability test machine with 4 cm depth of cutting and 3,68 cm width of cutting tools conducted by Paranindya (2015) and Perdana (2015). The authors conduct the physical test and numerical modelling for both small-scale and full-scale laboratory cuttability test to assess the result from the small-scale cuttability test. Specifically, numerical modelling with the finite element method in Rocscience 3 (RS 3) is conducted to visualize rock breakage mechanism with drag pick. 1. Introduction One type of mining methods that has been developed as technology improves is continuous mining. Bucket Wheel Excavator, Surface miner in open pit mine and roadheader in underground mine are unconventional excavating machines commonly used for continuous mining. Cutting tools on such kind of machines generally include the drag tool to do mechanical breakage and its performance can be predicted through the cuttability test in laboratory. The cuttability test for some kind of rocks can be analyzed based on cutting force (Fc) and specific energy (S.E) data. Roxborough (1987) explains that an engineer can choose the size and type of the cutting machine due the inability to adjust insitu rock formation that will be faced during the excavation. It is clear that the most affecting factor for the cuttability is not the machine, but the rock mass itself, so an assessment on rock properties and some rock mass influences for cuttability should be of concern to researchers.
...irlin, R. L, Farmer, S.L., and Bahorich, M.S., 1998, 3-D seismic attributes using a semblance-based Acknowledgements: coherency algorithm: Geophysics, 63, 1150-1165. We thank the US Department of Energy and Output Ex...roject. The effect of prestack depth migration on 3-D seismic attributes: Geophysics, 64, 1553-1561.Acknowledgements Figure 1a: Inline with no smoothing. Figure 2a: Inline with smoothing. Figure 1b: Time slice wit...
Summary Multitrace seismic attributes including coherence, dip/azimuth, amplitude gradients, and spectral decomposition provide a means of rapidly extracting structural, stratigraphic, and tuning features from high quality 3-D seismic data. Unfortunately, given cost and time constraints our 3-D seismic images often suffer from inaccurate velocity/depth models giving rise to defocused, somewhat smeared images. Likewise variability in seismic survey fold and source-receiver azimuth within cdp bins, as well as inadequate geophone array suppression of backscattered surface waves can give rise to acquisition footprint which is often exacerbated by these modern edge detection attributes.
...etters, 239, 177-184. two sites have normal polarity. Only one site has an intermediate direction. Acknowledgements The characteristic directions of the sites with normal and We thank Aneta Nedelcu for her help with... data was direction within the secular variation limits. This done with the programs of R.J. Enkin. Acknowledgements show that the investigated area was not subjected to vertical axes rotations after the emplacement ...
Introduction Summary In the CarpathianโPannonian region in Neogene times, westward-dipping subduction in a land-locked basin caused collision of two lithospheric blocks with the southeastern border of the European plate. Calc-alkaline and alkaline magmatism was closely related to subduction, rollback, collision and extension. Previous paleomagnetic results (e.g. Panaiotu, 1998) have shown that some volcanic area suffered important vertical axes rotations during the rollback. The purpose of our study was to identify if such rotations were present in the final stage of the collision at the south-eastern tip of the volcanic chain. The CarpathianโPannonian region of eastern central Europe is a key region for resolving the link between magmatism and tectonics. Miocene-Quaternary magmatic rocks display spatial and temporal geochemical variations, which may result from complex tectonic regimes: subduction, collision, postcollision and extension (e.g. Seghedi et al., 2004). Magmatic activity developed between 20 and<0.1 Ma and consists of (a) large volumes of calc-alkaline magmatic products (basalts, basaltic-andesites, andesites, dacites, rhyolites) and (b) sporadic small volumes of alkaline magma types (alkalic basalts, basanites, shoshonites, lamproites). In the Eastern Carpathians the volcanism was active from 12 to<1 Ma, migrating southeastward and progressively waning (Pecskay et al., 1995). The last part of the volcanic chain is in the Harghita Mountains were the volcanic activity took place between 5 Ma and<1 Ma. Previous paleomagnetic results in the Eastern Carpathians were obtained from the northern part of the volcanic chain (Patrascu, 1993), the central part (Patrascu, 1976) and the south-western end (Panaiotu et al., 2004). In this paper we present the first paleomagnetic results from the southern part of the volcanic chain (the Harghita Mountains). Sampling and methods We report results from eight sites sampled in andesites (5), basaltic andesites (2) and dacites (1). All samples were collected as cores drilled using a portable drill and oriented with magnetic and solar compasses. Up to three standard 25 x 22 mm cylinders were prepared from each core. Thin and polished sections were prepared from each site for optical mineralogical analysis. All remanence measurements were performed on a JR5 spiner magnetometer. Progressive demagnetization employed conventional alternating field and thermal methods. Demagnetization data were inspected using orthogonal demagnetization diagrams and individual magnetizations were identified as linear segments in both horizontal and vertical projections defined by three or more demagnetization steps. Characteristic directions were determined using principal components analysis. All accepted linear segments have maximum angular deviation (MAD) values of less than 10ยฐ. The methods of Fisher, assuming circular distribution of individual magnetization directions about a true mean direction, were employed to estimate site-mean directions and associated statistics. Rock magnetic investigations involved acquisition of isothermal remanent magnetization (IRM) and backfield direct field demagnetization of IRM obtained in a peak field of 2.0 T, thermal demagnetization of a composite IRM acquired in two different fashions, and AF demagnetization of ARM, acquired in a DC field of 0.05 mT and a peak alternating field of 100 mT. In addition, we monitored lowfield susceptibility during progressive thermal.
- North America > Canada > Alberta (0.25)
- Europe > Central Europe (0.25)
- Europe > Romania (0.20)
- Geology > Geological Subdiscipline > Volcanology (1.00)
- Geology > Rock Type > Igneous Rock > Basalt (0.97)
- Geology > Structural Geology > Tectonics > Compressional Tectonics (0.76)
A Comparative Study of the API and NORSOK Standards Apply to Design Analysis for an Offshore Wind Turbine with Jacket Support Structure
Lin, C. Y. (Institute of Nuclear Energy Research, Mechanical & System Engineering Program) | Huang, C. C. (Institute of Nuclear Energy Research, Mechanical & System Engineering Program) | Wu, T. Y. (Institute of Nuclear Energy Research, Mechanical & System Engineering Program)
...5th Edition, Harper Collins. Twidell, J and Gaudiosi, G (2009). Offshore wind power, Multi-Science ACKNOWLEDGEMENTS Publishing Company, 425. Vorpahl, F, Popko, W, and Kaufer, D (2011). "Description of a basic The a...uthors would like to express their acknowledgements to the model of the UpWind reference Jacket for code comparison in the Ministry of Science and Tech...
Abstract This paper is to perform the Jacket support structure design analysis for a 5MW reference offshore wind turbine of IEA OC4 project using API RP 2A-WSD and NORSOK N-004 design standards. The analysis is conducted by a global-local structural analysis scheme. In global analysis, the NREL FAST code is employed to analyze the dynamic responses of entire OWT structure under severe design load cases of IEC 61400-3. The tower base forces and moments are thus calculated and then used as the input of SAP2000 to conduct the Jacket support structural analysis, and then the member and joint strength checks are performed using the API and NORSOK standards, respectively. Totally 9 severe design load cases are considered in this work. The results show that the analyzed Jacket structure is fully in compliance with the requirements of API and NORSOK standards. In addition, it reveals that the NORSOK standard provides slightly more safety margin than API.
- Asia (0.72)
- North America > United States > District of Columbia (0.16)
- Energy > Renewable > Wind (1.00)
- Government > Regional Government > North America Government > United States Government (0.49)
...Jenny Thompson Chris Wojcik Jie Zhang Matthias Imhof Ryan Ruppert Christine Economides Additional Acknowledgements Donors Arthur Cheng Annabella Betancourt Jessica Dostal SEG Managing Director SEG Students an...
- Energy (0.44)
- Government > Regional Government > North America Government > United States Government (0.34)
Gas Lifted and Naturally Flowing Wells Exception Process via GIS - A State of the Art Surveillance Process
Nooraldeen, Yasser (Tatweer Petroleum) | Derbas, Zainab (Tatweer Petroleum) | Zainal, Yousif (Tatweer Petroleum) | Esbai, Rami (Tatweer Petroleum) | AlQassab, Khalil (Tatweer Petroleum) | Alkooheji, Hamza (Tatweer Petroleum) | Almal, Mohamed (Tatweer Petroleum) | Bandla, Kranthi (Tatweer Petroleum) | AlNowakhda, Ali (Tatweer Petroleum) | Samineni, Sreeharshan (Tatweer Petroleum)
...8 SPE-192499-MS Figure 6--Filters Details - Trends - Actions and Acknowledgements Some of the main features of the system are as follows: Details: By clicking on any of the problema...
...n engineers to know the actual behavior of the wells by looking into the historical data. Actions & Acknowledgements: SCOPE is not only a visualization interface, it acts as a decision making tool by taking actions o...
...10 SPE-192499-MS Figure 9--Actions & Acknowledgements KPIs Total Problematic Wells [Vs] Total Acknowledged Wells (Figure 10): This chart represents the ...
Abstract In today's world of increased automation and large data, Geographical Information Systems ("GIS") technology has been proven to be a useful component in the oil industry. Through the integration of GIS with critical production engineering and oil wells operations, a prime example of such uses have been realised at Tatweer Petroleum ("Tatweer"). Real-time data streaming from the Bahrain Field ("Bahrain Field" or "Field") has been integrated with GIS to deliver an advanced insight into the production environment leading to profound improvements in control and operation. The GIS, Information Technology, and the Production Engineering teams at Tatweer collaborated to develop a unique application to highlight operations awareness of critical operational events using real-time streaming data imposed on a spatial map.Surveillance and Control of Operation Production Environment ("SCOPE") is a pilot application covering specific traits related to Tatweer's producing wells which focuses on seven traits - (alarms for events such as High Flowline Pressure, Dead Wells, Shut-ins, Transmitters Errors, etc.) SCOPE is an application that was developed by using available tools by focusing on integrating and complementing existing applications and data sources. SCOPE is developed using GIS and real-time data management software which replicates the Bahrain field information on SCOPE within one (1) minute, focusing at well level as Iconics stop at facilities (i.e. Tank Battery/ Well Manifold) and obtaining data from different sources to one dashboard screen. Anomalies can be detected as cluster events, analyzing data to indicate post-events and pre-event and provides a decision tool to acknowledge and take action for particular problematic wells, and measures their efficiency (Key Performance Indicators).
- Asia > Middle East > Bahrain (1.00)
- Asia > Middle East > Israel > Mediterranean Sea (0.54)
- Information Technology > Information Management (1.00)
- Information Technology > Communications (1.00)
- Information Technology > Architecture > Real Time Systems (1.00)
... as well. The results of this study can contribute to select site for deep disposal of SNF in Korea Acknowledgements This work was supported by the Radioactive Waste Management of the Korea Institute of Energy Techno...
Abstract Korea Radioactive Waste Agency (KORAD) established in 2009 has started a new project to collect information on long-term stability and deep geological environment in the Korean Peninsula. The data has been built up in the KORAD integrated natural barrier database system (KOINS). KOINS also includes socially and economically important information, such as land use, mining area, natural conservation area, population density, and industrial complex, because the information is used as exclusionary criteria at the site selection process of geological repository. It is believed that the KOINS will be effectively utilized to narrow down the number of sites where future investigation is required in the siting process of geological repository. 1. Introduction Geological disposal has been recognized world-widely as one of the safest methods in the light of isolating the spent nuclear fuel permanently from human and environment. Accordingly, it is required not only to understand the geological phenomena of geotectonic movements but also to perform its long-term prediction at least more than 100 thousand years for the purpose of the deep disposal. 2. Overseas research of geological disposal 2.1 Siting factors and criteria The many studies for a high-level radioactive waste geological repository reported the fundamental requirements with an emphasis on the long term safety aspects (Gordon, 2002). According to these studies, siting factors can be divided four main categories:safety, technology, land and environment, and Societal aspects. The safety aspect means siting factors of importance for the long-term safety of the deep repository (SKB, 1993). The technology aspect is siting factors of importance for the construction, performance and safe operation. The land and environmental aspect indicates siting factors of importance for land use and general environmental impact. Lastly, the societal aspects are siting factors connected to political considerations and community impact. There are fundamental requirements that must be met by a deep repository.
- Asia > South Korea (0.30)
- Asia > North Korea (0.30)
- Water & Waste Management > Solid Waste Management (1.00)
- Energy > Power Industry > Utilities > Nuclear (1.00)
- Law (0.94)
...d Plot for Wireline Pressure Data Gradient Interpretation REFERENCES SUMMARY ACKNOWLEDGEMENTS June 2009 PETROPHYSICS 229...
ABSTRACT: This paper proposes a fluid density interpretation chart that applies the Hough Space in Wire line pressure data processing. It is based on the Hough transform and the particular features of pressure depth data, and can provide precise gradient information. The enhanced drawing method clarifies the data around the cross points, and helps identify gas, oil or water. It can be used as quality control tool for wire line pressure logging and has been proven by field data application. INTRODUCTION Pressure measurement is widely applied in logging technology to determine formation and wellbore fluid pressure. As pressure gauges, depth control systems and other survey methods (Lee et al., 2005) offer a high level of accuracy, the recorded pressure data can allow for the calculation of fluid density and the identification of fluid type, provided that pressure gradients are dependent only on fluid density (Veneruso et al., 1991). Traditionally, pressure depth data are reviewed by plotting on pressure depth diagram (Pelissier-Combescure et al., 1979). While this clearly illustrates the total pressure change and range with depth, pressure gradient information is not clear because slopes of the regression lines change only slightly in a traditional plot and there is little sensitivity to gradient information. The excess pressure model enhances small density changes, but the density value is still not directly shown on the plot (Brown, 2003). The Hough Transform is an algorithm widely applied to line detection in image processing. This application prompted a test of the Hough Transform for analyzing wire line formation pressure data. HOUGH TRANSFORM The Hough Transform uses a transformed coordinate system to achieve a special purpose (Hough, 1962). The Hough Transform of a straight line may be understood on the following way. The coordinate system is also known as Hough Space, and Hough Transform variations such as the probabilistic Hough Transform, randomized Hough Transform, progressive probabilistic Hough Transform and connective Hough Transform etc., are used for line, circle detection and other similar purposes. (Casasent and Krishnapuram, 1987; Kiryatin et al., 1991; Xu et al., 1990; Yuen et al., 1993; Matas et al., 2000). This paper investigates the Hough Transform of pressure-depth data in which different pressure gradients correspond to different fluid types. FIELD DATA EXAMPLES There are obvious slope changes in the upper intervals and others that are not clear in the lower intervals. Additionally, the slopes and gradients at each point are not immediately obvious in this traditional plot, while the Hough Space has slope information and can show information on all possible pressure gradients. In order to zoom inside the sinusoidal band and reduce the redundancy in Hough Space, a different method was used in this study in which an appointed sinusoidal curve is subtracted from each individual sinusoidal curve. In the two examples, grouped sinusoidal curves do not cross at one precise location because the data does not tightly fit a straight line relationship. The variance reflects the data's typical departure from a straight line.