CHARACTERISTICS OF CAP ROCKS IN CUOQIN BASIN,TIBET
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摘要: 自1994年开始,中国石油天然气总公司开展了对青藏高原的地质调查。通过四年对藏北措勤盆地路线地质调查,发现有多套烃源岩。本文从岩性、厚度、岩石微观结构等方面研究了烃源岩盖层,发现泥质岩类、火山岩类及碳酸盐岩类为本区油气藏的主要盖层,致密粉细砂岩为次要盖层,并对各类盖层的有效性进行了评价。Abstract: China National Petroleum Corporation has conducted petroleum exploration in Qinghai-Tibetan Plateau since 1994.Several sets of source rocks have been discovered after 4 years' geological reconnaissance in the Cuoqin Basin of northern Qinghai-Tibetan Plateau.The cap rocks essential to the oil and gas preservation have been evaluated from their lithology,thickness and microstructure.Mudstones,volcanic rocks and carbonates are suggested to be the dominant cap rocks for oil pools,then come the dense siltstones.
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Key words:
- Qinghai-Tibetan Plateau /
- Cuoqin Basin /
- petroleum reserve /
- cap rock /
- evaluation
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