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Predicting the Effects of Organic Content and Maturation on the Elastic Properties of Central North Sea Source RocksNormal access

Authors: J.A. Hansen and N.H. Mondol
Event name: 80th EAGE Conference and Exhibition 2018
Session: Poster: Rock Physics A - Carbonates and Source Rocks
Publication date: 11 June 2018
DOI: 10.3997/2214-4609.201800865
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 890.99Kb )
Price: € 20

The maturity of source rocks due to their shallow burial is a critical factor in the Central North Sea. In order to examine lateral variations of maturity of the source rocks, quantitative analysis of seismic data is required. The motivation for this study is to investigate the effects and relative impact of organic content, thermal maturity and hydrocarbon generation on elastic properties of organic rich shales. Using some established models, realistic approximations and reference trends that are calibrated to our area and applicable to our well log data, we can begin to predict how our data will behave as conditions change. We observe consistent compaction trends for immature to early mature shales at similar levels of TOC, and can from there infer the effect of hydrocarbon generation in data from a deeply buried, mature source rock. These trends can potentially help us evaluate seismic inversion results and data from other wells where TOC content and source rock maturity are in question.

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