| Summary through the south part of Songliao Basin in western slope area, the existinggeological data and geochemical data, the use of data and related geological research resultsof geochemical analysis, a comprehensive analysis of the heavy oil and oil and gas source,slope belt of oil and gas migration filling process, display characteristics; based ondetermining the effective oil and gas source conducting path, analysis the accumulationprocess and main controlling factors of heavy oil, a slope zone, established typicalaccumulation model; based on the reservoir characteristics, formation mode and accumulationprocess, analysis and prediction of favorable reservoir characteristics and explorationpotential. Following is the main conclusion and understanding:1Saertu oil source sand body is NNW or nearly north-south direction in this area;2sets of security region oil with high, three low characteristics, namely, the overalldensity, high viscosity, high resin content, low asphaltene content, low sulfur content, lowfreezing point, biodegradation of its origin and the long distance of transportation caused bychromatography and late stage (Grade5-6) about. Taobao oilfield oilfield water qualitycoefficient, calcium-magnesium coefficient is larger, the desulfurization coefficient is larger,carbonate equilibrium coefficient is larger, oil-gas preservation unfavorable, late formationwater alteration;3the western slope zone in the upper part of the oil and gas combinations are displayed,the Y2+3segment for the western oil and gas migration of the main channel, the channelcoefficient and the effective space of oil and gas migration intensity coefficient indicatinghedging fault NE-SW main migration direction;4through the comprehensive study on the structure, deposition, migration of oil and gasin west slope analysis, will be divided into3plane reservoir favorable zone, namely Yingtaifavorable zone, hedging and area and Fuxing favorable area. |
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