Hydrocarbon Detection Method and Application Based on Two-Wide and One-High Seismic Technique

Abstract

The "Two-Wide and One-High" (wide-band, wide azimuth and high-density) Seismic Technique provided high-quality seismic data for more accurately identify the lithologic reservoirs, with low frequency information and broadband data being beneficial to the petroleum detection in the reservoirs. Hydrocarbon reservoir is a typical two-phase (solid and fluid phases) media. The seismic wave can display the characetristics of obvious low-frequency resonance and high-frequency attenuation in the seismic record after propagating through the two-phase media. Based on the theory and the "Two-Wide and One-High" Seismic data, the hydrocarbon detection is carried out in AMG block's two carboniferous sets of main reservoirs in the eastern Precaspian Basin. Three methods are useded to analyze variation in the low-frequency and high-frequency after the seismic wave propagating through the exploration target strata, such as area difference method, time-frequency method of three primary colors method, instantaneous bandwidth method. The petroleum detection result accords well with the drilling testing data in the area, which means that this detection method based on the "Two-Wide and One-High" Seismic data could lower the exploration drilling risk and provides the advantageous basis for well location deployment of hydrocarbon reservoir exploration in the area.