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Proceedings Papers

Paper presented at the 2nd World Petroleum Congress, June 14–19, 1937
Paper Number: WPC-2074
... d'une mesure est telle que l'erreur sur la ddtermination de la variation de G entre deux points n'excède pas 0,5 milligal. Les isogammes ont pu être tracés de milligal en milligal. Leur traed concorde t r ès bien avec les rèsultats obtenus antérieurement à l'aide de la balance de toi - sion d'Eotvos...
Proceedings Papers

Paper presented at the 7th World Petroleum Congress, April 2–9, 1967
Paper Number: WPC-12163
... Abstract Announcements in late 1965 and early 1966 of successful independent developments of two dissimilar borehole gravimeters having precisions close to 0.01 milligal began a new era of subsurface geophysical research. Depth-measurement precisions ranging from 3 to 6 cm permit overall...
Proceedings Papers

Paper presented at the 6th World Petroleum Congress, June 19–26, 1963
Paper Number: WPC-10050
... milligal Courtesy precision Section I - Paper 38 - PD 4 u. s. A. RECENT DEVELOPMENTS IN AIRBORNE MAGNETICS AND GRAVITY L. L. Nettleton * Abstract. Airborne magnetic surveys for minerals and for petroleum prospecting have covered some twelve mil l ion miles of flying in a t least 60 different countries...
Proceedings Papers

Paper presented at the 5th World Petroleum Congress, May 30–June 5, 1959
Paper Number: WPC-8041
... la Cordillère des Andes. La différence de l'anomalie, quand on traverse cette faille en direction Est-Ouest, est de 40 à 60 milligals. La strncture essentielle de la vallée centrale est décrite à l'aide d'un profil longitudinal qui parcourt 8" de latitude. On donne aussi dix profils transversaux...
Journal Articles
J Pet Technol 28 (06): 709–718.
Paper Number: SPE-5511-PA
Published: 01 June 1976
... and have successfully measured gravity and/or density gradients within the well bore. Howell et al. 12 reported on the vibrating-string concept (Fig. 5), indicating a tool precision of about 0.01 milligal or an ability to measure the density of a 30-ft interval to within 0.02-gm/cc accuracy. Extensive...
Proceedings Papers

Paper presented at the 1994 SEG Annual Meeting, October 23–28, 1994
Paper Number: SEG-1994-0830
... ABSTRACT No preview is available for this paper. gravity carson service carson aerogravity generation aerogravity system pp7 airborne gravity geology wavelength anomaly gumert milligal penfield correction reference line test range evaluation program evaluation reservoir...
Journal Articles
Trans. 151 (01): 253–260.
Paper Number: SPE-943253-G
Published: 01 December 1943
... to confirm one another. The gravity map shown in Fig. 2 is believed to be in tenths of milligals and the refraction outline was supposed to be the sooo-ft. contour on salt. A complete torsion balance picture of Darrow dome and vicinity, made before the dome was proved by drilling, is given by Fig. 3, which...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-3550
... concept for the first time. Initial results are promising and we expect that with continued effort we should achieve sub-milliGal precision in AUV gravity surveys. Introduction: Gravity measurements have long played a unique role in the characterization of oil and gas reservoirs. Originally, the observed...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-0741
... is the inability to calculate useful densities at high depth resolution, usually taken as less than 30 feet. The culprit here is the division by Dg, which amplifies the effect of errors in Dg as Dz becomes small. For a station spacing of 10 feet and a Dg measurement uncertainty of 0.0071 milliGals (mGals...
Proceedings Papers

Paper presented at the 2nd World Petroleum Congress, June 14–19, 1937
Paper Number: WPC-2076
..., of surface in top of salt domes show that a lso bu means 06 the gravimeter the size and local positi Upstream Oil & Gas mit dem den Jahren gravimeter der mittlere fehler Schleusener werden milligal mgal der messungen mit dem thyssen-gravimeter messungen mit dem entwicklung der messungen...
Proceedings Papers

Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-0435
... of the aircraft. These can be of the order of tens or even hundreds of thousands of milligals. Even if there is a very slight deviation of the gravity sensor from the vertical, the horizontal accelerations will influence the gravity measurements. Vertical accelerations of the aircraft combine directly...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 1979
Paper Number: OTC-3462-MS
... telemetry. Sediment motions are measured with a three-axes array of force-balanced accelaro- meters having a dynamic range of 50 milligals to 500 gals. Accelerometer outputs are digitized at a rate sufficient to reprod.uce frequencies up to 20 Hz. Data are stored in a one-million bit capacity solid-state...
Journal Articles
J Pet Technol 19 (09): 1119–1124.
Paper Number: SPE-1659-PA
Published: 01 September 1967
... the individual landowners for a payment of $50, plus damages incurred as a result of drilling. A +7/10 milligal residual gravity anomaly was discovered near Glasford, Ill., approximately 15 miles southwest of Peoria. A dry hole drilled 10 years prior to the company's exploration was located on the crest...
Proceedings Papers

Paper presented at the 3rd World Petroleum Congress, May 28–June 6, 1951
Paper Number: WPC-4045
.... As an aid to the discussion two bathymetric charts, also on scale 1: 10,000,000, have been com- piled from the latest available data. Résumé La communication présente deux cartes d'isogam- mes à l'échelle 1: 10.000.000, avec htervalle d'iso- gammes de 25 milligals. L'une représente la Mer des Caraïbes...
Proceedings Papers

Paper presented at the 3rd World Petroleum Congress, May 28–June 6, 1951
Paper Number: WPC-4016
..., des soins s éciaux ont été nécessaires dans les campagnes de détail pour que les anomalies locales qui n'excèdent pas un très petit nombre de milligals soient suffisamment claires. Les principes d'organisation et d'exécution des recherche Upstream Oil & Gas regional anomaly accuracy...
Proceedings Papers

Paper presented at the 2nd World Petroleum Congress, June 14–19, 1937
Paper Number: WPC-2075
... in field- lion x = û simplifies to work and which allow g-determinations to be made with (3") Q = -ATZ, with a mean ernor, which is, at the present time, about A" = h - k. O5 milligal. 4 s such instruments now are being used for A" is tha total control in the zero position, oil prospecting by the company...
Proceedings Papers

Paper presented at the 1989 SEG Annual Meeting, October 29–November 2, 1989
Paper Number: SEG-1989-0329
.... Mean square averages of these residuals are as follows : 2.4 gmlcc Bouguer : 2.630 milligals Single layer, variable density Bouguer lreqression) : 2.278 milligals Double layer, variable density Bouguer (Nettleton) : 2.159 milligals Average combined densities (weighted average between (II and oz...
Proceedings Papers

Paper presented at the 1990 SEG Annual Meeting, September 23–27, 1990
Paper Number: SEG-1990-0639
... Figure 4. Elevation contour map over part of the southern coastal region of South Africa. Contour interval 200 metres. Figure 5. Isostatic effect over southern coast of South Africa. Contour interval 20 milligals. Airy- Heiskanen hypothesis, 30 km compensation depth, averag crustal density of 2870 kg.m...
Proceedings Papers

Paper presented at the 2001 SEG Annual Meeting, September 9–14, 2001
Paper Number: SEG-2001-1478
... salt gap between inline coordinates 350,000 and 450,000 feet. Figure 2: Bouguer gravity Wiener depth sliced 0 to 20,000 feet below sea level. Red = anomalies > 2.0 milligals, purple = anomalies < -2.0 milligals, and light blue = small anomalies 0.1 milligals). (EDCON gravity data) Modeling Procedure...
Journal Articles
Pet. Technol. 7 (06): 1–49.
Paper Number: SPE-944111-G
Published: 01 November 1944
.... The anomaly taken as a whole is much obscured by a large regional increase of gravity southward and by the effects of the adja- cent Damon Mound, West Columbia, Lochridge, Long Point, and Rabbs Ridge minima. The maximum has an amplitude of 1.S milligals. It is very slightly larger in area NW SW .003 .002 WEST...

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