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塔里木盆地的油气勘探实践证明在该盆地寻找“大油田”只能依赖于有机质丰度较高、热演化程度适度的烃源岩。本文从石炭纪原型盆地类型与有机岩相带预测出发,指出了呈区域性展布的、发育在被动陆缘厌氧陆架环境的石炭系卡拉沙依组烃源岩即为这类源岩,主要发育在麦盖提斜坡部位。烃源岩晚期成熟,石油排运充分,阿尔塔什组区域盖层封盖,多套储集层段(Q_1、C_1b、C_(1-2)k、C_2x、P_2)等构成了麦盖提斜坡有利的石油成藏条件。本文指出以地层—岩性型油藏为基础可在麦盖提斜坡形成大油田。
The exploration of oil and gas in the Tarim Basin proves that the search for “big oil fields” in this basin can only rely on the source rocks with high abundance of organic matter and moderate thermal evolution. Based on the predictions of the Carboniferous prototype basin types and organic lithofacies zones, this paper points out that the source rocks of the Carboniferous Karashayi Formation in the anaglyphic anaerobic shelf environment are regionally distributed, Mainly developed in the Maigaiti slope. Late maturation of source rocks, sufficient oil drainage, cover of the Altush Formation, multiple sets of reservoir segments (Q_1, C_1b, C_ (1-2) k, C_2x, P_2) Slopes favorable oil accumulation conditions. This paper points out that based on the stratigraphic-lithologic reservoirs, a large oil field can be formed in the Magenti slope.