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Mehrotra, N. C.
- Palynology in Hydrocarbon Exploration - Advancements in Indian Perspective
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Affiliations
1 KDM Institute of Petroleum Exploration, ONGC, Dehradun, IN
1 KDM Institute of Petroleum Exploration, ONGC, Dehradun, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 53, No 6 (1999), Pagination: 637-648Abstract
Palynology plays an important rote in cost effective exploration and exploitation of hydrocarbons. It consists of study of spores, pollen, dinoflagellate cysts, diatoms, nannoplankton, silicoflagellates, radiolaria, chitinozoa, algae and other organic remains.
Study of spore, pollen, dinoflagellate cysts and nannoplankton help in precise dating of sediments, marking of hiatuses and correlating surface and subsurface samples by giving absolute ages in million years. Source rock study helps in visual typing of kerogen, quantitative assessment of organic matter, paleoenvironment and palynofacies interpretation. Spectral analysis gives precise thermal maturation levels. The integration of source rock parameters helps in deciphering source rock potential facies. Correlation of burial history curves with the source rock potential facies helps in the determination of time and duration of hydrocarbon generation. Examples from different sedimentary basins emphasizing the role of palynology in hydrocarbon exploration are cited.
The biozonal comparisons and absolute pollen frequency (APF) values are being used for interpreting transgressive - regressive cycles. Paleogeographic maps can be reconstructed with palynological data. The chronostratigraphical correlation with seismic stratigraphy is being attempted in geologically synchronous stratal surfaces. Palynological studies support basin analysis leading to stratigraphic evolution and hydrocarbon prospect analysis. They aIso help to build sequence biostratigraphy and delineation of reservoir sands for effective reservoir management.
Keywords
Palynology, Hydrocarbons, Exploration, Dinoflagellate, India.
- Memoir 61: Palynology in Hydrocarbon Exploration (The Indian Scenario)
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Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 67, No 1 (2006), Pagination: 4-4Abstract
No Abstract.Full Text
- Meeting of the North Indian Chapter of the Geological Society of India at Lucknow
Abstract Views :179 |
PDF Views:131
Authors
Affiliations
1 Birbal Sahni Institute of Palaeobotany 53, University Road, Lucknow - 226 007, IN
1 Birbal Sahni Institute of Palaeobotany 53, University Road, Lucknow - 226 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 66, No 5 (2005), Pagination: 645-645Abstract
No Abstract.Full Text
- Memoir 61: Palynology in Hydrocarbon Exploration (The Indian Scenario)
Abstract Views :183 |
PDF Views:135
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Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 66, No 6 (2005), Pagination: 764-764Abstract
No Abstract.Full Text
- Memoir 48: Palynology in Hydrocarbon Exploration the Indian Scenario
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PDF Views:153
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Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 59, No 6 (2002), Pagination: 530-530Abstract
No Abstract.Full Text
- Reworked Carboniferous Palynofossils from Panna Formation, Bombay Offshore Basin: Clue to a Hidden Target for Hydrocarbon Exploration
Abstract Views :167 |
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Authors
Affiliations
1 KDM Institute of Petroleum Exploration, Oil and Natural Gas Corporation Limited, Dehra Dun -248 195, IN
1 KDM Institute of Petroleum Exploration, Oil and Natural Gas Corporation Limited, Dehra Dun -248 195, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 57, No 3 (2001), Pagination: 239-248Abstract
A reworked Carboniferous palynofossil assemblage from the subsurface sections of the Early Eocene basal clastics of Panna Formation, Bombay offshore basin has been discovered. This assemblage is recorded at various stratigraphic levels of the studied well sections along with the indigenous Early Eocene dinoflagellate cysts and sporepollen taxa. Initial studies have suggested more than one possibility of explaining the provenance of reworked sediments containing the Carboniferous palynofossils. One possibility is that these might have been derived from the erosion of Early Palaeozoic sediments present in the Deccan volcanic province. Alternatively, these sediments could result from long distance transport of reworked material from Saudi Arabia-Africa region in the west which were deposited in the Bombay offshore region during Early Eocene. Available evidences, for and against these two possibilities are discussed. Our studies show that the Carboniferous reworked assemblage is confined to the Heera-Bassein block. The reworking in the Panna Formation might have taken place by palaeorivulets cutting through the thin Deccan Trap flows, exposed in the faulted blocks. A model explaining the mechanism of reworking has been presented. Organic matter studies indicate the presence of mature sediments below the Deccan Trap, which suggest a possible hidden basin to be a new exploration target for hydrocarbon.Keywords
Carboniferous, Palynofossils, Panna Formation, Bombay offshore basin, Hydrocarbon.- Reworked Carboniferous Palynofossils from Panna Formation, Bombay Offshore Basin: Clue to Hidden Target for Hydrocarbon Exploration
Abstract Views :180 |
PDF Views:194
Authors
Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
2 Keshab Dev Malviya Institute of Petroleum Exploration, Oil and Natural Gas Corporation Limited, Kaulagarh Road, Dehra Dun - 248 195, IN
1 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
2 Keshab Dev Malviya Institute of Petroleum Exploration, Oil and Natural Gas Corporation Limited, Kaulagarh Road, Dehra Dun - 248 195, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 58, No 2 (2001), Pagination: 179-182Abstract
No Abstract.Full Text
- Palynological Dating and Correlation of Surface and Subsurface Sediments from Wardha Valley Coalfield, Maharashtra
Abstract Views :204 |
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Authors
Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow - 226 007, IN
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow - 226 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 77, No 2 (2011), Pagination: 137-148Abstract
42 genera of palynomorphs have been reported from the qualitative and quantitative analysis of the palynoflora from both open cast mine and bore holes viz., Ballarpur open cast mine, Durgapur open cast mine and Bore hole CMWNM-57 on barrier between Kawadi/Majri open cast and Hindustan Lalpeth Colliery from the Wardha valley coalfield of Wardha basin. Two palynoassemblages have been recorded i.e., an Upper Karharbari palynoassemblage comprising dominance of radial monosaccate genus Parasaccites and subdominance of nonstriate disaccate genus Scheuringipollenites and a Lower Barakar palynoassemblage consisting of dominance of Scheuringipollenites and subdominance of striate disaccates chiefly Faunipollenites, suggesting an Early Permian age (Late Sakmarian to Early Artinskian) to the sediments. It is further authenticated by the occurrence of palynotaxa viz., Crucisaccites, Caheniasaccites, Indotriradites and Tiwariasporis. Upper Karharbari Formation has been demarcated for the first time in lithologically designated Barakar Formations in Ballarpur, Durgapur, Majri and Hindustan Lalpeth Colliery while the sample 57/2 of bore hole CMWNM from Kawadi area may belong to the Kamthi Formation on the basis of pinkish yellowish coarse grained to medium grained sandstone. An attempt has been made to correlate these palynoassemblages with other Lower Gondwana basins of Early Permian affinity.Keywords
Palynomorphs, Early Permian, Upper Karharbari, Lower Barakar, Correlation, Wardha Valley Coalfield, Maharashtra.- Memoir 48: Palynology in Hydrocarbon Exploration the Indian Scenario (Part I: Category I Basins)
Abstract Views :171 |
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Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 60, No 5 (2002), Pagination: 526-526Abstract
No Abstract.Full Text
- Early Triassic Palynomorphs from Manuguru Area of Godavari Graben, Andhra Pradesh
Abstract Views :175 |
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Authors
Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow – 226 007, IN
1 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow – 226 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 78, No 2 (2011), Pagination: 167-174Abstract
Palynological analysis of the subsurface sediments from the bore hole 1008 (PK-6&7 blocks) from Manuguru area of Godavari graben has revealed the presence of Early Triassic palynoflora. Quantitative and qualitative palynological analysis of the productive samples have shown that the palynofossil content is predominated by cingulate-cavate spores, viz. Lundbladispora and Densoisporites and taeniate pollen like Lunatisporites in association with other taxa, such as Falcisporites, Alisporites, Klausipollenites, Chordasporites, Verrucosisporites and Osmundacidites. The above recovered palynoflora provides conclusive evidence for the presence of Early Triassic sediments equivalent to Panchet in the Manuguru area of Godavari graben. This is the first record of Early Triassic palynoflora in the Manuguru area. This corroborates the findings of Jha and Srivastava (1996) that the Lower Kamthi Formation represents the Early Triassic sequence equivalent to the Panchet Formation.Keywords
Palynology, Early Triassic, Manuguru, Godavari Graben, Andhra Pradesh.References
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