夏72井区风城组火山岩喷发模式及其分布

Volcanic Eruption Pattern and Distribution of Fengcheng Reservoir of Permian in Wellblock Xia-72,Northwestern Margin of Junggar Basin

准噶尔盆地西北缘夏72井区块二叠系风城组油藏储集层岩性为流纹质熔结角砾凝灰岩,物性较好,油气产能较高,是深层有利的勘探领域。剖析了这种火山岩喷发模式及分布的主要控制因素,提出了裂隙式火山喷发模式,其分布主要受控于火山口及古地貌,从而为此类油气藏的勘探研究提供了依据。

The Fengcheng formation of Permian in Wellblock Xia-72 in Northwestern margin of Junggar basin composes of rhyolitic clinkering breccia tuff with good petrophysical property and high productivity, and is a favorable area for deep oil-gas exploration. This paper analyzes the controlling factors for the volcanic eruption pattern and distribution of this reservoir. It is suggested that the fissure volcanic eruption is its main eruption pattern, and the distribution is mainly controlled by the crater and the paleogeomorphology. The result provides the basis for exploration of such a reservoir.