Corrigendum to total organic carbon content and total porosity estimation in unconventional resource play using integrated approach through seismic inversion and well logs analysis within the Talhar Shale, Pakistan [Journal of Natural Gas science and Engineering, volume 52C, 2019, 2423]

2021 ◽  
Vol 88 ◽  
pp. 103833
Author(s):  
Muhammad Fahad Mahmood ◽  
Zulfiqar Ahmad ◽  
Muhsan Ehsan ◽  
Beenish Aslam
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Total Porosity ◽  
Integrated Approach ◽  
Seismic Inversion ◽  
Well Logs ◽  
Organic Carbon Content ◽  
Science And Engineering ◽  
Unconventional Resource ◽  
Porosity Estimation

scholarly journals Impact of Effective Microorganisms (EM) Application on the Physical Condition of Haplic Luvisol

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1049 ◽  
Author(s):  
Jacek Pranagal ◽  
Sławomir Ligęza ◽  
Halina Smal
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Physical Condition ◽  
Total Porosity ◽  
Organic Carbon Content ◽  
Effective Microorganisms ◽  
Water Capacity ◽  
Water Stable Aggregates ◽  
Water Stable Aggregate ◽  
Stable Aggregate

The study set out to determine changes in the soil air-water properties, the water-stable aggregate share and organic carbon content as effects of a five-year application of effective microorganisms (EM-A). The hypothesis that long-term applied EM-A biopreparations have a positive effect on the soil physical condition has not been confirmed. Haplic Luvisols originating from silt were studied in a field experiment after EM-A biopreparation treatment. The soil samples with the natural structure preserved intact were collected three times each year. The properties of the soil determined in the study were: particle density, total organic carbon content, bulk density, total porosity, air capacity, air permeability, soil moisture at sampling, field water capacity, available water content, unavailable water content, and water-stable aggregate content. The ratio of field water capacity and total porosity (FC/TP) was calculated. It was found that EM-A application primarily leads to a decrease in the content of organic carbon and water-stable aggregates. This was an adverse effect. Total organic carbon (TOC) and water-stable aggregates proved to be very sensitive indicators for assessing the soil physical condition. However, changes in soil compaction and air–water properties did not show significant deterioration. Our research addresses the data gaps about EM application to soil.

scholarly journals Geophysical Prediction Technology Based on Organic Carbon Content in Source Rocks of the Huizhou Sag, the South China Sea

2017 ◽  
Vol 24 (s2) ◽  
pp. 4-13 ◽  
Author(s):  
Wei Yang ◽  
Xiao-xing Gong ◽  
Fei-fei Peng
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Linear Relationship ◽  
Assessment Method ◽  
Seismic Inversion ◽  
Source Rocks ◽  
Seismic Facies ◽  
Organic Carbon Content ◽  
Seismic Attribute ◽  
Regional Prediction

Abstract Due to the high exploration cost, limited number of wells for source rocks drilling and scarce test samples for the Total Organic Carbon Content (TOC) in the Huizhou sag, the TOC prediction of source rocks in this area and the assessment of resource potentials of the basin are faced with great challenges. In the study of TOC prediction, predecessors usually adopted the logging assessment method, since the data is only confined to a “point” and the regional prediction of the source bed in the seismic profile largely depends on the recognition of seismic facies, making it difficult to quantify TOC. In this study, we combined source rock geological characteristics, logging and seismic response and built the mathematical relation between quasi TOC curve and seismic data based on the TOC logging date of a single well and its internal seismic attribute. The result suggested that it was not purely a linear relationship that was adhered to by predecessors, but was shown as a complicated non-linear relationship. Therefore, the neural network algorithm and SVMs were introduced to obtain the optimum relationship between the quasi TOC curve and the seismic attribute. Then the goal of TOC prediction can be realized with the method of seismic inversion.

Organic Carbon Content and Source Rock Identification Based on Geophysical Well Logs

1986 ◽  
Vol 8 (4) ◽  
pp. 381-439 ◽  
Author(s):  
Walter H. Fertl ◽  
George V. Chilingarian ◽  
Teh Fu Yen
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Source Rock ◽  
Well Logs ◽  
Organic Carbon Content ◽  
Geophysical Well Logs

scholarly journals Compost and Wildflowers for the Management of Urban Derelict Soils

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Roberto Pini ◽  
Francesca Bretzel ◽  
Enzo Sparvoli ◽  
Beatrice Pezzarossa ◽  
Manuele Scatena
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Water Movement ◽  
Aggregate Stability ◽  
Total Porosity ◽  
Individual Species ◽  
Organic Carbon Content ◽  
Entire Area ◽  
Treated Soil ◽  
The Individual

The aim of this study was to verify whether the use of source-separated municipal waste compost could improve the physical quality of urban soils and create better conditions for their management when planted with herbaceous species. A sandy soil in traffic islands was tilled to a depth of 10 cm, and half of the surface was treated with compost (3 kg/m2). A mixture of 25 herbaceous annuals was then sown in the entire area. Organic carbon content and physical characteristics were determined at different times in the soil treated and not treated with compost. The vegetation was monitored in terms of its growth and flowering. The compost-treated soil showed an increase in organic carbon content. Total porosity increased with time in the compost-treated soil, due to a higher volume of transmission pores, which play a role in water movement. Soil aggregate stability also improved in the compost-treated soil. The duration of flowering of the individual species and the overall quantity of flowers were greater in the compost-treated soil.

A new method for estimating total organic carbon content from well logs

AAPG Bulletin ◽  
2016 ◽  
Vol 100 (08) ◽  
pp. 1311-1327 ◽  
Author(s):  
Peiqiang Zhao ◽  
Zhiqiang Mao ◽  
Zhenhua Huang ◽  
Chong Zhang
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Carbon Content ◽  
New Method ◽  
Well Logs ◽  
Total Organic Carbon Content ◽  
Organic Carbon Content

scholarly journals S-Index as an indicator of physical quality in soils of the Paraná state

2018 ◽  
Vol 22 (7) ◽  
pp. 458-464
Author(s):  
João H. Caviglione
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Bulk Density ◽  
Pearson Correlation ◽  
Total Porosity ◽  
Wilcoxon Test ◽  
Native Forest ◽  
Organic Carbon Content ◽  
Physical Quality ◽  
Soil Physical Quality

ABSTRACT From the 1990s, the demand for soil quality indicators has increased with the agricultural sustainability approaches. The S-index was proposed as an indicator of soil physical quality. The objective was to evaluate the sensitivity of S-index as an indicator of soil physical quality and its correlation with bulk density, organic carbon content, macroporosity, microporosity, total porosity and clay, sand and silt contents, under field conditions in the diversity of the Paraná state. Samples were collected from 21 sites with textures from clay and heavy clay, in the layers of 0-0.1 and 0.1-0.2 m, in soil under native forest and in cultivated soil. Eight soil physical attributes were determined. A soil-water retention curve with six moisture points was fitted and the S-index was calculated for each condition. The Wilcoxon Test showed differences in S-index between soil managements with p-value = 0.0015 in the 0-0.1 m layer and less than 0.0001 in the 0.1-0.2 m layer. The observed S-index showed to be a sensitive indicator of soil physical quality and with a significant Pearson correlation with bulk density (‑0.826), macroporosity (0.760), total porosity (0.836), and organic carbon content (0.583).

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