Magnetic and gravity anomaly patterns related to hydrocarbon fields in northern West Siberia

Abstract

A study of the features of gravity and magnetic fields in the vicinity of oil and gas reservoirs in West Siberia demonstrated a spatial relationship with the hydrocarbon deposits. The relevant magnetic and gravity anomalies cover approximately [Formula: see text] in northern West Siberia. Amplitude and frequency were investigated initially using double Fourier spectrum (DFS) analysis. This was followed by (1) application of transformations, filtering, and “moving windows” analysis; (2) compilation of maps of regional and local anomalies, and potential field derivatives; and (3) investigation of the distribution of parameters in areas of known deposits. Hydrocarbon deposits are located mostly at the slopes of positive regional gravity and magnetic anomalies which are interpreted as relating to deep riftogenic structures. At the same time, it is established that the location of hydrocarbon depositions coincides commonly with local gravity and magnetic minima generated by lows in basement density and magnetization. All known hydrocarbon deposits in northern West Siberia are in areas characterized by comparatively high gradients of constituent of gravity anomalies with a wavelength of about 90–100 km. These newly revealed links between reservoirs and potential field parameters may be a means to predict new discoveries in poorly explored territories and seas, primarily in Russia's Arctic shelf.

Basin Framework and Basement Structuring of Lower Benue Trough, West Africa based on Regional Magnetic Field Data: Tectonic and Hydrocarbon Implications

“…These structural features may serve as depocenters and conduits for hydrocarbon in the study area. The local magnetic minima predominant in the data set generated by lows in basement magnetization may be sites for hydrocarbon deposits as demonstrated by Piskarev & Tchernyshev (1997) in hydrocarbon fields in northern west Siberia. They showed the relationship between slopes of positive magnetic anomalies and hydrocarbon deposits which is interpreted as relating to deep riftogenic structures.…”

A ubiquitous method for predicting underground petroleum deposits based on satellite data

“…Where any of the underground petroleum reservoirs exist, the density of the earth of that place will be less than the other places of surroundings having no reservoirs 37 . Due to the relationship with density, the gravitational field will face some curve in the spatial domain at that place 38 . Since this gravitational change will be extremely small, a more detailed sensitive property called Gravity Gradient Tensor (GGT) 39 can be used to detect such anomalies in the gravitational field in the spatial domain.…”

Efemçukuru Altın Yatağının Bulunduğu Seferihisar Yükselimi’nin (İzmir) Petrol ve Doğalgaz Potansiyelinin Suda Toplam Petrol Hidrokarbonları (TPH) Analizi ve Gravite-Manyetik Verilerle İncelenmesi

“…Gravite ve manyetik verilerinin petrol ve doğalgaz aramalarında kullanımına yönelik yöntemleri ve saha uygulamalarını içeren çok sayıda çalışma mevcuttur (64)(65)(66)(67)(68)(95)(96)(97)(98)(99)(100)(101)(102)(103)(104)(105)(106). Gravite ve manyetik anomali analizi, Batı Sibirya'da hidrokarbon arama ve keşfinin yarım yüzyıldan bugüne kalıcı bir bileşeni olmuştur [103].…”

“…Gravite ve manyetik verilerinin petrol ve doğalgaz aramalarında kullanımına yönelik yöntemleri ve saha uygulamalarını içeren çok sayıda çalışma mevcuttur (64)(65)(66)(67)(68)(95)(96)(97)(98)(99)(100)(101)(102)(103)(104)(105)(106). Gravite ve manyetik anomali analizi, Batı Sibirya'da hidrokarbon arama ve keşfinin yarım yüzyıldan bugüne kalıcı bir bileşeni olmuştur [103]. İnceleme alanında olduğu gibi, jeokimyasal araştırmalarla petrol hidrokarbonları varlığı kanıtlanmış (olgun hidrokarbonlarca zengin sular belirlenmiş) olan bölgelerdeki petrol ve/veya doğalgaz rezervuarının (kapanının) yerinin belirlenmesi için özellikle sismik ölçümler çok önemlidir.…”