electrical and gamma ray logging in gondwana and tertiary

electrical and gamma ray logging in gondwana and tertiary

Electrical and gamma-ray logging in gondwana and

1979-9-1 Electrical and gamma-ray logging have been very useful for identification and accurate determination of depth and thickness of coal seams in Gondwana and Tertiary coal fields of India. The characteristic resistance/resistivity peaks of coal seams in a particular area have been correlated, thus providing a picture of the subsurface structure.

Nuclear geophysical logging for Gondwana coal

2011-11-25 Kayal JR (1979) Electrical and gamma-ray logging in Gondwana and Tertiary coal fields of India. Geoexplor 17:243–258. Article Google Scholar Kayal JR, Das LK (1981) A method of estimating ash content of coal from combined resistivity and gamma-ray

Gamma and resistivity logs for characterization of ...

2014-11-12 Kayal JR (1979) Electrical and gamma-ray logging in Gondwana and Tertiary coalfields of India. Geoexploration 17:243–258. Article Google Scholar Kayal JR (1980) Application of borehole geophysics for exploration of coal in Gondwana coalfields of Eastern India. Abstract. In: Crosswell MM, Vella P (eds) Gondwana five.

(PDF) Nuclear Borehole Logging for Gondwana coal seams

Coal seams were delineated from low gamma counts and high gamma-gamma counts of the nuclear logging. 33.98m thick coal seam was delineated at CSE-19

(PDF) Nuclear geophysical logging for Gondwana coal ...

From the gamma and gamma–gamma logs of boreholes AEN 002, 007, 044, 045, 063, 085, and 105, which were carried out at the Phulbari Coal Basin of Bangladesh, two coal seams—upper and main with ...

Coal Quality Estimation using geophysical logging without ...

Electrical and gamma-ray logging have been very useful for identification and accurate determination of depth and thickness of coal seams in Gondwana and Tertiary coal fields of India. The ...

A method of estimating ash content of coal from

1981-12-1 Sample electrical and gamma-ray logs from the Jharia coalfield, Bihar, in the Gondwana Formation. 195 Gamma-ray intensity has been recorded as mR/h. For the sake of plotting, the gamma-ray log data has been converted from mR/h to counts/s by standard conversion procedure. Gamma-count-rate is maximum for shale and minimum for coal.

Correlation of T-log with E-log in coal-bearing formations ...

Kayal, J. R. (1979),Electrical and Gamm-ray Logging in Gondwana and Tertiary Coalfield of India, Geoexploration17. Kayal, J. R. (1980),Application of Borehole Geophysics for Exploration of Coal in Gondwana Coalfields of Eastern India. Presented in the Fifth International Gondwana Symposium, New Zealand. Download references

Use of geophysical logs in hydrogeological studies and ...

2018-10-6 The hydrogeological study of Apapa, a coastal part of Lagos, Nigeria, has been investigated using combined geophysical borehole logs, consisting of natural gamma and electrical resistivity components and ditch cutting samples. This study utilized data from 10 boreholes to delineate freshwater aquifer and proposes the best borehole design and construction for optimum groundwater

Petrophysical characterisation of reservoir intervals in ...

2018-10-31 Studies for the characterization of hydrocarbon reservoirs using well logs have been carried out in the M-Field of the Douala Basin to evaluate the hydrocarbon prospectivity, delineate hydrocarbon zones and determine the petrophysical properties of the identified reservoir rocks. Data from two wells comprising gamma ray, resistivity, neutron, density logs were used. Gamma ray log was used for ...

(PDF) Nuclear Borehole Logging for Gondwana coal seams

Coal seams were delineated from low gamma counts and high gamma-gamma counts of the nuclear logging. 33.98m thick coal seam was delineated at CSE-19

(PDF) Nuclear geophysical logging for Gondwana coal ...

From the gamma and gamma–gamma logs of boreholes AEN 002, 007, 044, 045, 063, 085, and 105, which were carried out at the Phulbari Coal Basin of Bangladesh, two coal seams—upper and main with ...

Circular 891 - Geophysical Logs as a Source of Coal Bed Data

A gamma ray log is the most versatile of the geophysical logs for the following reasons: (1) it does not require fluid in the hole; (2) it is not sensitive to small variations in hole diameter; and (3) it can be used to detect coal beds through well casing. In fact, near-surface gamma ray logs of cased oil and gas wells are a prime source of ...

Facies Interpretation from Well Logs: Applied to SMEKS ...

2012-11-7 Gamma ray log shapes and results from core analysis were used to define the log facies and depositional environments in this study. Analysis of the gamma ray logs indicates that the log trend fall mostly into four categories namely; Irregular trends, funnel-shaped, cylindrical/box car-shaped and bell-shaped successions. Modified from Shell (1982)

Petrophysical Analysis of the Mpapai Well Logs in the

2019-5-28 (gamma ray log, neutron porosity log, bulk density log, PEF values and resistivi-ty logs). 2. Geology and Tectonic Setting 2.1. General Geological Setting The East Pande Exploration Block is one among the south-eastern Tanzania coastal basin located

Gamma ray log to estimate clay content in the layers of ...

Like most well-logging parameters, the gamma-ray log can be affected by environmental conditions of measurement such as borehole diameter or mud density, as well as background radiation. Logs are also affected by the characteristics of the radioactive emission, the peculiarities of the sonde detection systems, and the logging speed.

U.S. Department of the Interior U.S. Geological Survey

2010-12-22 Figure 18. Gamma-ray logs within PVC casing in MSB-3B, MSB-3D, and MSB-22. Figure 19. Ranges of electrical resistivity of core samples and saturants. Figure 20. Computational sequence for porosity and saturation. Figure 21. Original and computed log curves for well MHT-9C. Figure 22. Original and computed log curves for well MHT-1C.

Application of rock physics parameters for lithology and ...

2018-12-1 The high in resistivity log from reservoir A2001 corresponds to the velocity ratio description of sand with hydrocarbon, while gamma ray log missed the kick in resistivity log. Although in reservoirs A001 and B001 in well 1, gamma ray log serves as a better lithology indicator compared to

Preliminary analysis of petrophysical data set of a ...

2019-10-18 Gamma Ray – IGR (Equation 9) and selecting type of rock, to evaluate V sh (Equation 10): max min log min Gr GR GR I GR , (1) GR GR sh A I I V (1 )., ) where GR is gamma ray log (ºAPI); GR min and GR max are, minimum and maximum values for GR log, respectively; AGR = 1 to Tertiary rocks, 2 for pre-Tertiary rocks and 3 for post-Tertiary rocks.

Logging Characteristics and Identification Methods of Low ...

2017-5-29 Statistical analysis of 336-core sample from 8 cores in the area shows that the porosity of the sandstone of the X~XII sand groups of K 2 qn 3 Formation ranges within 8%~17% with an arithmetic mean of 11.7% (Figure 3(c)).The permeability is distributed within 0.02~160 × 10 −3 μm 2 with average value of 4.5 × 10 −3 μm 2 (Figure 3(d)), all of which indicates that K 2 qn 3 is a typical ...

U.S. Department of the Interior U.S. Geological Survey

2010-12-22 Figure 18. Gamma-ray logs within PVC casing in MSB-3B, MSB-3D, and MSB-22. Figure 19. Ranges of electrical resistivity of core samples and saturants. Figure 20. Computational sequence for porosity and saturation. Figure 21. Original and computed log curves for well MHT-9C. Figure 22. Original and computed log curves for well MHT-1C.

Facies Interpretation from Well Logs: Applied to SMEKS ...

2012-11-7 Gamma ray log shapes and results from core analysis were used to define the log facies and depositional environments in this study. Analysis of the gamma ray logs indicates that the log trend fall mostly into four categories namely; Irregular trends, funnel-shaped, cylindrical/box car-shaped and bell-shaped successions. Modified from Shell (1982)

Lithology and - USGS

2012-7-24 gamma-ray log; C. Texaco Inc. Howard Major oil test, lithologic and electric logs and Anaconda drill-hole F-2396, electric and gamma-ray log; D. Humble Oil and Refining Santa Fe Pacific B1 oil test, lithologic and electric logs and Kerr McGee drill-hole RR-5, electric and gamma-ray log; E. Avila Oil Co. Oqlum) oil test, lithologic and

Application of rock physics parameters for lithology and ...

2018-12-1 The high in resistivity log from reservoir A2001 corresponds to the velocity ratio description of sand with hydrocarbon, while gamma ray log missed the kick in resistivity log. Although in reservoirs A001 and B001 in well 1, gamma ray log serves as a better lithology indicator compared to

UNIVERSITY OF DELAWARE DELAWARE GEOLOGICAL

2020-4-6 11. Partial gamma log of well Gd32-5 showing peak bracketing Cretaceous-Tertiary boundary • • . • . . • • . • . . . 21 12. Partial gamma log of well Ec41-9 showing gamma peak at approximate contact of Mt. Laurel and Marshalltown Formations 22 13. Correlation of gamma peaks in selected wells 23 14. Partial gamma log of well Ed51-3 ...

DOWNHOLE LOGS - Texas AM University

The logs used in this analysis include density, P-wave velocity, S-wave velocity, natural gamma ray, electrical resistivity, and NMR logs acquired at Sites 1244, 1245, and 1247 (Holes 1244E, 1245E, and 1247B are CWL holes and Holes 1244D, 1245A, and 1247A are LWD holes).

Stratigraphy and Composition of the Sharon Springs

2010-10-25 tric and gamma-ray well-log characteristics. The Sharon Springs Member is in Kansas, Nebraska, North and South Dakota, and parts of Colorado, Wyoming, Montana, and east ern Utah. Its type locality is in Wallace County, Kans., where the member

Petrophysical characteristics and reservoir quality of the ...

delineated for Well-2, using the gamma ray log. Well-1 The reservoirs in this well have average thicknesses from 5.5 ft in reservoir A to 24.5 ft in reservoir C. The average shale volume content (Vshale) of the reservoirs in Well-1 is between 0.677 to 0.879v/v decimal [table 3].

Estimation of rock uniaxial compressive strength for an ...

2018-12-1 As shown in Table 1, the compressional sonic transit time, neutron porosity, bulk density gamma ray (to obtain clay volume) are the most commonly used parameters to obtain the rock strength (Nabaei et al., 2010, Rabbani et al., 2012).In this study, three parameters including porosity, density and water saturation are used. To construct different models, the aforementioned parameters values are ...

Logging Characteristics and Identification Methods of Low ...

2017-5-29 Statistical analysis of 336-core sample from 8 cores in the area shows that the porosity of the sandstone of the X~XII sand groups of K 2 qn 3 Formation ranges within 8%~17% with an arithmetic mean of 11.7% (Figure 3(c)).The permeability is distributed within 0.02~160 × 10 −3 μm 2 with average value of 4.5 × 10 −3 μm 2 (Figure 3(d)), all of which indicates that K 2 qn 3 is a typical ...

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