中国斜坡逸散型油砂成矿模式及有利区预测

Formation Model and Prospet of the Slope Spill-scattered Type Oil-sand in China

在总结多年油砂勘探实践经验及成果的基础上,分析了典型盆地油砂成矿特点,提出了斜坡逸散型油砂成矿模式,并认为斜坡逸散型油砂是中国陆相含油气盆地中规模最大、最重要的油砂类型,可进一步分为简单斜坡逸散型和复杂斜坡逸散型两种。复杂斜坡逸散型油砂在中国陆相含油气盆地中成矿条件最佳、规模最大、勘探前景最好。以松辽西斜坡为例,在分析简单斜坡逸散型油砂成矿模式的基础上指出了简单斜坡油砂找矿方向,预测出三个油砂勘探有利区。以准噶尔盆地西北缘为例,在分析复杂斜坡逸散型油砂成矿模式的基础上指出了复杂斜坡油砂找矿方向,预测出四个油砂勘探有利区。斜坡逸散型油砂成矿模式及找矿方向的提出,对中国油砂勘探及有利区预测具有重要意义。

Based on lots of experiences from the oil sand exploration, the oil-sand forming model of the slope spill-scattered type are proposed in this paper. This type of oil-sand is the biggest of nonmarine oil and gas bearing basin in China. Slope spill-scattered type oil-sand is subdivided into complex slope type and simple slope type. The complex slope type oil-sand ,which has the best mineral-formation conditions, is the biggest and most favorable prospect area. The western slope zone of the north area of Songliao Basin, as an example of the simple slope type of oil-sand, by analyse the metallogenic model and prospect indicators, has been point out its three profitable exploring areas. As an example of complex slope type of the oil-sand, by analysing the metallogenic model and prospect indicators, we also predict its four profitable exploring areas in the west-north margin of Junggar Basin. The slope spill - scattered metallogenic model and the prospect indicators given in this paper have very significance sense in oil-sands exploration in China.