Joint PP-PS litho-elastic AVA inversion: Example from Midland Basin
- Edan Gofer (Schlumberger) | Ran Bachrach (Schlumberger) | Simone Re (Schlumberger) | Federico Golfre’ Andreasi (Schlumberger)
- Document ID
- Society of Exploration Geophysicists
- SEG International Exposition and Annual Meeting, 15-20 September, San Antonio, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Exploration Geophysicists
- Inversion, Converted wave, Reservoir characterization, AVO/AVA
- 4 in the last 30 days
- 10 since 2007
- Show more detail
Compared to PP prestack amplitude versus angle (AVA) inversion, joint PP-PS prestack AVA inversion can provide a more accurate estimate of VP/VS ratio (or S-impedance) and density, thus enabling a better estimate of lithological classification and petrophysical properties. This is especially important in an unconventional basin such as the Permian where operators are targeting zones with oil-filled porosity that requires hydraulic fracturing to be economically viable. The Texas Midland Basin Wolcampian- and Leonardian-aged sediments are the primary targets for oil and gas production and they are both fairly clay-rich. Because hydraulic fracturing rocks with high clay content is challenging, identifying such rocks prior to drilling is of paramount importance for all financial considerations related to field development and production. Single-loop litho-elastic (LE) AVA inversion inverts seismic data to estimate lithology and elastic parameters through data assimilation. Solving jointly for lithology and elastic parameters relaxes the dependency on the prior low-frequency models and has the potential to reduce project turnaround time. Herein, we demonstrate joint PP-PS LE AVA inversion on a three-component, three-dimensional (3C-3D) data set from the Midland Basin.
Presentation Date: Monday, September 16, 2019
Session Start Time: 1:50 PM
Presentation Time: 2:15 PM
Presentation Type: Oral
|File Size||847 KB||Number of Pages||5|
Bachrach,R.,2018,Nonlinear single loop litho-petro-elastic prestack inversion using data assimilation techniques:80th Annual International Conference and Exhibition, EAGE,Extended Abstracts,1–5, doi:10.3997/2214-4609.201801326
Bachrach,R., andM.Paydayesh,2017,Application of sequential and Kalman filters for seismic-geomechanics reservoir monitoring:88th Annual International Meeting, SEG,Expanded Abstracts,5928–5932,10.1190/segam2017-17661103.1.
Barnola,A., andM.Ibram,2014,3D simultaneous joint PP-PS prestack seismic inversion at Schiehallion field, United Kingdom Continental Shelf:Geophysical Prospecting,64,278–292,doi:10.1111/1365-2478.12077.
Johns,T.,2018,Horizon-focused birefringence analysis of 3C PS seismic data: Permian Basin — Case Study, NE Midland:89th Annual International Meeting, SEG,Expanded Abstracts,2387–2391,doi:10.1190/segam2018-2995469.1.
Paydayesh,M.,M. A.Leathard, andJ.Mathewson,2014,The synergy between PS and PP for reservoir definition — Applying simultaneous joint PP-PS inversion for Oseberg South:76th Annual International Conference and Exhibition, EAGE,Extended Abstracts,16–19,doi:10.3997/2214-4609.20141023.
Rimstad,K.,P.Avseth, andH.More,2012,Hierarchical Bayesian lithology/fluid prediction: A North Sea case study:Geophysics,77,no.2,B69–B85, doi:10.1190/geo2011-0202.1.