Gas chimney identification using the integration of seismic attributes

Bakhtiari, M.R. and Riahi, M.A., 2009. Gas chimney identification using the integration of seismic attributes. Journal of Seismic Exploration, 18: 43-56. Open and fluid conductive fractures in some reservoir rocks cause gas accumulation in upper horizons leading to a gas column resembling a chimney and thus known as a gas chimney. There are two different methods for identification of gas chimney locations; the first one is the direct viewing of signal amplitude variations and in the second method, single seismic attributes like dip variance, energy and similarity, etc. are used. In this paper we introduce a new method based on the direct viewing of amplitude variations and the integration of several attributes in an Artificial Neural Network (ANN). A comparison of the results obtained by the presented approach with those given by the common approach using only amplitude viewing method or single seismic attribute shows a considerable improvement in the identification of gas chimney location.
- Heggland, R., 2005. Using gas chimneys in seal integrity analysis: A discussion based on case
- histories. In: Boult, P. and Kaldi, J. (Eds.), Evaluating Fault and Cap Rock Seals. AAPG
- Hedberg Series, 2: 237-245.
- Heggland, R., 1997. Detection of gas migration from a deep source by the use of exploration 3D
- seismic data. Mar. Geol., 137: 41-47.
- 56 BAKHTIARI & RIAHI
- Heggland, R., Meldahl, P., Bril, A.H. and de Groot, P.F., 1999. The chimney cube, an example
- of semi automated detection of seismic objects by directive attributes and neural networks.
- Part II: Interpretation. Expanded Abstr., 69th Ann. Internat. SEG Mtg., Houston.
- Tingdahl, K.M., 1999. Improving Seismic Detectability Using Intrinsic Directionality. Earth
- Sciences Center, Goteborg University, Goteborg, Sweden.
- Tingdahl, K.M., Bril, A.H. and de Groot, P.F., 2001. Improving seismic chimney detection using
- directional attributes. J. Petrol. Sc. and Engin., 29: 205-211.