Sediment Compaction and Applications in Petroleum Geoscience

Troyee Dasgupta, Soumyajit Mukherjee

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English

Springer Nature Switzerland AG
14 August 2020

Soil science, sedimentology; Geological surface processes (geomorphology); Economic geology

Series: Advances in Oil and Gas Exploration & Production

This book discusses how sediments compact with depth and applications of the compaction trends. Porosity reduction in sediment conveniently indicates the degree of sediments compacted after deposition. Published empirical curves- the compaction curves- are depth-wise porosity variation through which change in pore spaces from sediment surface to deeper depths e.g. up to 6 km can be delineated. Porosity is derived from well logs. Compaction curves, referred to as the Normal Porosity Profile of shales, sandstones and shale bearing sandstones of different models are reviewed along with the different mechanical and chemical compaction processes. These compaction models reveals how porosity reduces depth-wise and the probable reason for anomalous zones. Deviation from these normal compaction trends may indicate abnormal pressure scenarios: either over- or under pressure. We highlight global examples of abnormal pressure scenarios along with the different primary- and secondary mechanisms. Well logs and cores being the direct measurements of porosity, well log is the only cost-effective way to determine porosity of subsurface rocks. Certain well logs can detect overpressure and the preference of one log above the other helps reduce the uncertainty. Apart from delineation of under-compacted zones by comparing the modeled- with the actual compaction, porosity data can also estimate erosion.

By: Troyee Dasgupta, Soumyajit Mukherjee
Imprint: Springer Nature Switzerland AG
Country of Publication: Switzerland
Edition: 1st ed. 2020
Dimensions: Height: 254mm, Width: 178mm,
Weight: 454g
ISBN: 9783030134440
ISBN 10: 303013444X
Series: Advances in Oil and Gas Exploration & Production
Pages: 99
Publication Date: 14 August 2020
Audience: Professional and scholarly , Undergraduate
Format: Paperback
Publisher's Status: Active

Porosity development in siliclastic rocks.-Porosity development in Carbonate rocks.- Compaction Trend definition and classification.- Well logs, Seismic and Geological data in porosity and compaction trend analyses.- Deviation of normal compaction trend in relation to pore pressure.- Global examples of overpressure scenarios.- Exhumation history analysis from sonic compaction trend.- Impact of compaction trend in different tectonic- and geological setting.- Application of Porosity and compaction trend in Petroleum geoscience.- Summary