Magnetic and gravity signatures of the Kifl oil field in Iraq

作者: Mohanad Al-Farhan , Behrooz Oskooi , Vahid E. Ardestani , Maysam Abedi , Amar Al-Khalidy

DOI: 10.1016/J.PETROL.2019.106397

关键词: Sedimentary rockRegular gridTectonicsOil fieldSingular value decompositionPetrologyGeologyWeightingDensity contrastGravity anomaly

摘要: Abstract Potential field methods are capable to provide satisfactory results on the tectonics and geology, especially when dealing with hydrocarbon reservoirs ore-bearing mineralization. In this study, magnetic gravity survey were conducted at west of Kifl area in central Iraq image subsurface geological structure consequently characteristics oil gas reservoirs. Ground measurements an 16 by 24 km a regular grid spacing 250 m. The clarified tectonic setting study area, where fault system was recognized resembling both anomalies distinct trends along NS NW. A 3D inversion algorithm based weighted minimum length solution used for reconstruction physical properties susceptibility density contrast. Weighting matrix is composed multiplication compactness depth weighting functions, truncated singular value decomposition (TSVD) regularization. first applied synthetic model simulate reality while obtained. Implementing real potential data, reservoir determined. Four cross sections have been extracted from result show geometric (depth shape) main Kefl field. indicated presence middle within column sedimentary sequences represented as graben-horst structure. This phenomenon could be attributed deformation tension over Eurasian Arabian plates collided back Permian - Paleocene periods.

参考文章(37)
Federico Cella, Maurizio Fedi, Inversion of potential field data using the structural index as weighting function rate decay Geophysical Prospecting. ,vol. 60, pp. 313- 336 ,(2012) , 10.1111/J.1365-2478.2011.00974.X
Christopher Stadtler, Christine Fichler, Ketil Hokstad, Eva Andrea Myrlund, Susann Wienecke, Bente Fotland, Improved salt imaging in a basin context by high resolution potential field data: Nordkapp Basin, Barents Sea Geophysical Prospecting. ,vol. 62, pp. 615- 630 ,(2014) , 10.1111/1365-2478.12101
Brian Borchers, Richard C. Aster, Clifford H. Thurber, Parameter estimation and inverse problems ,(2005)
Maysam Abedi, Ali Gholami, Gholam-Hossain Norouzi, Nader Fathianpour, Fast inversion of magnetic data using Lanczos bidiagonalization method Journal of Applied Geophysics. ,vol. 90, pp. 126- 137 ,(2013) , 10.1016/J.JAPPGEO.2013.01.008
Maysam Abedi, Ali Gholami, Gholam‐Hossain Norouzi, 3D inversion of magnetic data seeking sharp boundaries: a case study for a porphyry copper deposit from Now Chun in central Iran Near Surface Geophysics. ,vol. 12, pp. 657- 666 ,(2014) , 10.3997/1873-0604.2014022
Olivier Boulanger, Michel Chouteau, Constraints in 3D gravity inversion Geophysical Prospecting. ,vol. 49, pp. 265- 280 ,(2001) , 10.1046/J.1365-2478.2001.00254.X
Yaoguo Li, Douglas W. Oldenburg, Fast inversion of large-scale magnetic data using wavelet transforms and a logarithmic barrier method Geophysical Journal International. ,vol. 152, pp. 251- 265 ,(2003) , 10.1046/J.1365-246X.2003.01766.X
R. Hackney, J. Goodwin, L. Hall, K. Higgins, N. Holzrichter, S. Johnston, M. Morse, G.K. Nayak, P. Petkovic, Potential-field data in integrated frontier basin geophysics: Successes and challenges on Australia's continental margin Marine and Petroleum Geology. ,vol. 59, pp. 611- 637 ,(2015) , 10.1016/J.MARPETGEO.2014.01.014