玛北地区三叠系百口泉组油藏成藏控制因素

Control factors of the Triassic Baikouquan reservoirs in Mabei area of Junggar Basin

准噶尔盆地玛北地区三叠系百口泉组的油气勘探结果显示,该区具有大面积含油、多层段含油的特点。通过储层特征和沉积环境等方面的研究,总结了该区三叠系百口泉组油气成藏的条件:三面遮挡是大面积成藏的宏观背景;顶底板的发育提供了有效的储盖组合;构造平缓、储层致密、底水不活跃是大面积成藏的基本条件。在此基础上,结合构造背景分析、地震属性研究、地震剖面解释及油气勘探成果,认为该区三叠系百口泉组油藏主要受古构造坡折带、深大断裂体系和沉积相带3个因素的控制。此研究可为该地区油气勘探开发提供一定依据。

The results of oil and gas exploration in the Triassic Baikouquan formation of Mabei area in Junggar Basin show that this formation hosts oil in a large area and multi-layer. The conditions of hydrocarbon accumulation are summarized through research on reservoir characteristics and depositional environment: shielding on three sides was a macro-background of forming large scale hydrocarbon accumulation; adjacent rocks served as effective reservoir-cap rock assemblage; gentle structure,tight reservoir and inactive bottom water had contributed to hydrocarbon accumulation in a large area. In addition,the combination of tectonic setting analysis,seismic attributes,seismic profile interpretation and petroleum exploration achievement has concluded that the Triassic Baikouquan reservoirs were mainly controlled by paleo slope break belt,deep fracture system and sedimentary facies.