Presentation is loading. Please wait.

Presentation is loading. Please wait.

SEAM PHASE I GRAVITY Neda Bundalo. DENSITY MODEL - Cell size 40x40x20 m - Density range 1.003 – 3.140 (2.64) g/cm 3 SEAM PHASE I GRAVITY MODEL SEAM Phase.

Similar presentations


Presentation on theme: "SEAM PHASE I GRAVITY Neda Bundalo. DENSITY MODEL - Cell size 40x40x20 m - Density range 1.003 – 3.140 (2.64) g/cm 3 SEAM PHASE I GRAVITY MODEL SEAM Phase."— Presentation transcript:

1 SEAM PHASE I GRAVITY Neda Bundalo

2 DENSITY MODEL - Cell size 40x40x20 m - Density range – (2.64) g/cm 3 SEAM PHASE I GRAVITY MODEL SEAM Phase I model: density cube

3 SEAM PHASE I GRAVITY MODEL CALCULATED GRAVITY Gravity (vertical component) G z and six tensor components (gradients) T xx, T xy, T xz, T yy, T yz, T zz, - GMSYS 3D (Geosoft) and 3MOD (LCT Fugro), - free-air and Bouguer anomalies on two calculation levels: 0 m for marine and 150 m for airborne data, - recommended data storage formats: Geosoft grid and ascii xyzg. Vector (beige) and tensor (red) components of gravity field; after Murphy, 2004.

4 SEAM PHASE I GRAVITY MODEL CALCULATED GRAVITY - with and without background density - density of 2.2 g/cm 3 used as a background density (mean voxel density) - density of 2.0 g/cm 3 used for Bouguer correction SEAM Phase I model: vertical density slice

5 SEAM PHASE I GRAVITY MODEL Free-air anomalies at sea level background density 2.2 g/cm 3 T xx T yy T xz T xy T yz T zz GzGz

6 SEAM PHASE I GRAVITY MODEL T xx T yy T xz T xy T yz T zz GzGz Free-air anomalies at 150 m level background density 2.2 g/cm 3

7 SEAM PHASE I GRAVITY MODEL T xx T yy T xz T xy T yz T zz GzGz Bouguer anomalies at sea level Bouguer correction density 2.0 g/cm 3 background density 2.2 g/cm 3

8 SEAM PHASE I GRAVITY MODEL T xx T yy T xz T xy T yz T zz GzGz Bouguer anomalies at 150 m level Bouguer correction density 2.0 g/cm 3 background density 2.2 g/cm 3

9 SEAM PHASE I GRAVITY MODEL Free-air anomalies at sea level, background density 2.2 g/cm 3 GzTxxTxyTxz min max mean sd TyyTyz min max mean sd Tzz min max mean sd24.944

10 SEAM PHASE I GRAVITY MODEL Free-air anomalies at 150 m level, background density 2.2 g/cm 3 GzTxxTxyTxz min max mean sd TyyTyz min max mean sd Tzz min max mean sd22.987

11 SEAM PHASE I GRAVITY MODEL Bouguer anomalies at sea level, Bouguer correction density 2.0, background density 2.2 g/cm 3 GzTxxTxyTxz min max mean sd TyyTyz min max mean sd Tzz min max8.840 mean sd6.992

12 SEAM PHASE I GRAVITY MODEL Bouguer anomalies at 150 m level, Bouguer correction density 2.0, background density 2.2 g/cm 3 GzTxxTxyTxz min max mean sd TyyTyz min max mean sd Tzz min max7.909 mean sd6.757

13 Gz mGal Txx E Txy E Txz E Tyy E Tyz E Tzz E FREE-AIR ANOMALIES AT SEA LEVEL FREE-AIR ANOMALIES AT 150 m LEVEL BOUGUER ANOMALIES AT SEA LEVEL BOUGUER ANOMALIES AT 150 m SEA LEVEL SEAM PHASE I GRAVITY MODEL RANGES OF GRAVITY ANOMALIES AND CORRESPONDING GRADIENTS

14 SEAM PHASE I GRAVITY MODEL CONTRIBUTORS Dr. Neda Bundalo (Marathon Oil), Dr. Richard Day (ConocoPhillips), John Bain (Bain Geophysical Services, Inc.) THANKS TO Dr. Xiong Li, Barry Wiggins, Pat Quist (Fugro Gravity and Magnetics Services, Inc.), Dr. Stuart Hall (Department of Geosciences, University of Houston), Dr. Irina Filina (Hess) NEXT STEP COMPARISON OF BASE OF SALT INVERSIONS USING VERTICAL COMPONENT AND GRAVITY GRADIENTS


Download ppt "SEAM PHASE I GRAVITY Neda Bundalo. DENSITY MODEL - Cell size 40x40x20 m - Density range 1.003 – 3.140 (2.64) g/cm 3 SEAM PHASE I GRAVITY MODEL SEAM Phase."

Similar presentations


Ads by Google