Design, Calibration, Characterization, and Field Experience of New High-Temperature, Azimuthal, and Spectral Gamma Ray Logging-While-Drilling Tools

2002 ◽  
Author(s):  
M. Mickael ◽  
D. Phelps ◽  
D. Jones
Keyword(s):  
High Temperature ◽  
Field Experience ◽  
Gamma Ray ◽  
Drilling Tools ◽  
Logging While Drilling

Application of logging-while-drilling spectroscopy to evaluate volume of clay, grain density, and porosity in a low porosity, high temperature environment—offshore Western Australia

2014 ◽  
Vol 54 (2) ◽  
pp. 533
Author(s):  
Paolo Bartelucci ◽  
Mauro Firinu ◽  
Anthony Jones ◽  
Ping Yan
Keyword(s):  
High Temperature ◽  
Gamma Ray ◽  
Water Saturation ◽  
Dry Weight ◽  
Core Data ◽  
Low Salinity ◽  
Petrophysical Model ◽  
Logging While Drilling ◽  
Calcium Iron ◽  
Low Porosity

Formation evaluation in low porosity, low salinity, and high temperature reservoirs poses many challenges. The environment is hostile to many logging tools due to their temperature limits and there is greater uncertainty related to petrophysical parameters compared with conventional formations. Additionally, in low porosity and low salinity reservoirs, resistivity contrast between hydrocarbon and water filled rocks is often missing. This extended abstract presents a case study from offshore WA where a petrophysical model has been created with logging while drilling measurements including spectroscopy data to improve estimation of mineralogy, clay volume and porosity, thereby reducing saturation evaluation uncertainty. Spectroscopy measurements can be analysed to derive dry weight elemental concentrations of various elements such as silicon, calcium, iron, and sulfur. These concentrations have been subsequently used as input to compute a multi-mineral petrophysical model using a least squares inversion technique. We demonstrate that spectroscopy can be used independently to obtain an accurate volume of clay instead of gamma ray, spontaneous potential, or porosity logs. Moreover, matrix properties such as grain density, which enhance the accuracy of porosity estimation derived from bulk density, are also derived from spectroscopy dataset. Good agreement with core validates the petrophysical model. Also demonstrated is how the petrophysical model reduces the uncertainty in clay volume and porosity, from which more accurate water saturation can be derived in these tight reservoirs. Calibrating the spectroscopy information to core data allows the mineralogical and geological model to be extended to the intervals where core data are not available.

scholarly journals Surface Composition and Corrosion of SS 41 Carbon Steel in High Temperature Water under γ-ray Irradiation

1982 ◽  
Vol 31 (4) ◽  
pp. 254-260
Author(s):  
Akihisa Sakumoto ◽  
Masao Gotoda ◽  
Yuji Horii ◽  
Hidetaka Konno ◽  
Hiroki Tamura ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbon Steel ◽  
Gamma Ray ◽  
Surface Composition ◽  
High Temperature Water ◽  
Gamma Ray Irradiation ◽  
Temperature Water

scholarly journals Induksi Mutasi Kalus Embriogenik Gandum (Triticum aestivum L.) melalui Iradiasi Sinar Gamma untuk Toleransi Suhu Tinggi

2015 ◽  
Vol 43 (1) ◽  
pp. 36 ◽  
Author(s):  
Ryan Budi Setiawan ◽  
Nurul Khumaida ◽  
Diny Dinarti
Keyword(s):  
High Temperature ◽  
Embryogenic Callus ◽  
Genetic Improvement ◽  
In Vitro Selection ◽  
Gamma Ray ◽  
Triticum Aestivum L ◽  
Temperature Tolerance ◽  
Randomized Design ◽  
Gamma Ray Irradiation

Mutation techniques through gamma ray irradiation is useful to support breeding programs for genetic improvement of wheat. Genetic improvement on tolerance to high temperatures is necessary for development of wheat in Indonesia. The purpose of this study was to determine the level of radiosensitivity to be used as the basis for the induction of mutations by gamma ray irradiation on embryogenic callus to obtain putative mutants with high temperature tolerance. Explants used were embryogenic callus cultured on MS medium containing 30 g L-1 sukrosa, 2 g L-1 gelrite, 2 mg L-1 2.4D and 1 mg L-1 picloram. Culture incubated for 6 weeks with temperature 20±4 oC in the room culture. Five irradiation doses (10, 20, 30, 40 and 50 Gy) were used in radiosensitivity testing. A factorial, completely randomized design was applied to the experiment. The first factor was selection temperature with three levels (25, 30 and 35 oC), and the second factor was doses of gamma ray iradiation with three levels (10, 20, and 30 Gy). The result showed that radiosensitivity levels varied among varieties, LD20: 7.79 to 18.96 Gy and LD50: 24.29-33.63 Gy. Selayar variety which has highest sensitivity value compared with Dewata and Nias. Increasing doses of iradiation and temperature decrease survival of embryogenic callus, number of embryos, and percentage of germinated plantlets. Based on in vitro selection using high temperature (25, 30, and 35 oC), the obtained 19 putative mutants were derived from embryos that appear on the surface of embryogenic callus survival after irradiation and high temperature selection.<br />Keywords: in vitro selection, putative mutant, radiosensitivity, somatic embryo

scholarly journals Moisture-Resistant Sealing Materials for Downhole HPHT Electrical Feedthrough Package

2019 ◽  
Vol 16 (3) ◽  
pp. 141-148
Author(s):  
Hua Xia ◽  
Nelson Settles ◽  
David DeWire
Keyword(s):  
High Temperature ◽  
Water Immersion ◽  
Electrical Power ◽  
Covalent Bond ◽  
Phase Structures ◽  
Sealing Material ◽  
Drilling Tools ◽  
Measurement While Drilling ◽  
Sealing Materials ◽  
Moisture Resistant

Abstract A bismuth oxide–based multicomponent glass system, xH3BO3-yBi2O3-(1-x-y-δ)MO-δ· rare earth oxides (REOs) with MO = TiO2, BaO, ZnO, Fe2O3, etc., and lanthanum series–based REOs, for making downhole high-pressure and high-temperature electrical feedthrough package has been developed using high-temperature melt-quenching and sintering technologies. By properly controlling phase structures in material-manufacturing processes, the obtained sealing materials have shown moisture-resistant properties in their monoclinic and tetragonal mixed phase structures but strongly hydrophobic properties in their covalent bond tetragonal phase. Sealed electrical feedthrough packages have been evaluated under boiling water immersion and 200°C/30,000 PSI water-fluid–simulated downhole harsh environments. The post electrical insulation measurement has demonstrated to be greater than 1.0 × 1014 Ω electrical resistance. This article will show that such a high–bonding strength and high–insulation strength sealing material could be used to seal electrical feed-throughs and connectors for 300°C/30,000 PSI downhole and subsea wireline, logging while drilling, and measurement while drilling tools' signal, data, and electrical power transmissions.

New high temperature resistant heavy concretes for fast neutron and gamma radiation shielding

2019 ◽  
Vol 107 (4) ◽  
pp. 359-367 ◽  
Author(s):  
Bünyamin Aygün ◽  
Erdem Şakar ◽  
Turgay Korkut ◽  
Mohammed Ibrahim Sayyed ◽  
Abdülhalik Karabulut
Keyword(s):  
High Temperature ◽  
Cross Sections ◽  
Gamma Ray ◽  
Mean Free Path ◽  
Mass Attenuation Coefficient ◽  
Normal Weight ◽  
Radiation Shielding ◽  
Equivalent Dose Rate ◽  
Normal Weight Concrete ◽  
Geant4 Code

Abstract In the present work, we developed three new high temperature resistant heavy concretes as novel radiation shielding materials. For this purpose, chrome ore (FeCr2O4), hematite (Fe2O3), titanium oxide (TiO2), aluminum oxide (Al2O3), limonite [FeO (OH) nH2O], siderite (FeCO3), barite (BaSO4), nickel oxide (NiO) materials and alumina cement were used. Mass combination ratios of components and total macroscopic cross sections (scattering, absorption, capture, fission) of the samples were calculated by using GEANT4 code. The resistances of the prepared samples were evaluated in terms of compression strength after exposure at the 1000 °C temperature. Neutron equivalent dose rate measurements were carried out by using 4.5 MeV 241Am-Be neutron source and BF3 detector. All results were compared with normal weight concrete and paraffin. The results of neutron dose indicate that neutron absorption ability of the new heavy concretes is higher than normal weight concrete and paraffin. In addition to neutron measurements, different γ-ray shielding parameters such as mass attenuation coefficient (MAC), effective atom numbers (Zeff), half value layer (HVL) and mean free path (MFP) have been calculated using WinXCOM software in order to investigate the effectiveness of using the prepared concretes as a radiation shielding materials. Gamma-ray results were compared with concretes and Pb-based glass.

Experimental Study of High-Temperature Resistant Cementing Materials in Geological Exploration Drilling Tools

2013 ◽  
Vol 774-776 ◽  
pp. 564-568
Author(s):  
Zuo Guo Qin ◽  
Yong Jun Shao
Keyword(s):  
Experimental Study ◽  
High Temperature ◽  
Orthogonal Test ◽  
Geological Exploration ◽  
Time Loss ◽  
Technology Program ◽  
Drilling Tools ◽  
Exploration Drilling ◽  
Cementing Material ◽  
Experimental Technology

As the main carrier for the protective casing purposes, cementing material is an important part in cementing design. In order to obtain a high temperature and high pressure resistant cementing material with low elasticity, we investigated on the high-temperature resistant cementing material used in geological exploration drilling materials to seek better cementing material for fulfilling requirements of high-temperature, and to find the best formula using orthogonal test. With compositions of the material in different proportions, this article investigated performances of the cementing material, as thickening time, loss of water, and compressive strength. By comparison, high-temperature resistant cementing materials experimental technology program has been finally estimated, and the composition ratio of the components are determined.

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