INTERRELATION BETWEEN MESOZOIC RESIDUAL BASINS IN THE SOUTHEASTERN PERIPHERY OF SONGLIAO BASIN AND OIL-GAS EXPLORATION PROSPECT
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摘要:
松辽盆地外围东南部中生代残留盆地群,近年发现了良好的油气显示,实现了工业油气流井突破.但盆地之间相互关系及其成藏特征研究薄弱,制约了该区油气勘探工程的部署和资源前景预测.为此,在油气勘探工程调查的基础上,通过系统的野外地质调研和测试分析,综合研究得出:松辽盆地外围东南部中生代残留盆地皆为独立的断陷盆地,其内下白垩统的下桦皮甸子组和亨通山组发育中等-好的烃源岩,并形成了良好的自生自储、下生上储和上生下储型生储盖组合,具有一定的油气勘探前景;其隐蔽的岩性油气藏和刺穿构造油气藏是有利的油气勘探方向.
Abstract:In recent years, good oil-gas indications have been found in the Mesozoic residual basins in the southeastern periphery of Songliao Basin, making a breakthrough in industrial oil-gas flow wells. However, the weak research on interrelation between basins and hydrocarbon accumulation characteristics restricts the deployment of oil-gas exploration engineering and prediction of resources prospect. Therefore, based on the oil-gas exploration engineering survey, through systematic field geological survey and test analysis, it is concluded that the Mesozoic residual basins are all independent fault basins, with medium-good source rocks developed in the Lower Cretaceous Xiahuapidianzi Formation and Hengtongshan Formation, forming good source-reservoir-cap assemblages of self generation-self storage, lower generation-upper storage, and upper generation-ower storage, with a certain oil-gas exploration prospect. The subtle lithologic oil-gas reservoir and diapiric-structure reservoir are favorable exploration direction.
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Key words:
- residual basin /
- source rock /
- oil-gas prospect /
- Mesozoic /
- Songliao Basin
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图 2 中国东北中新生代盆地发育史示意图(据文献[10]修改)
Figure 2.
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