辽河盆地东部凹陷火成岩储层特征及成藏模式

Igneous reservoir characteristics and hydrocarbon accumulation model in eastern sag of Liaohe Basin

按照成岩方式—化学成分—结构+矿物等岩性三级分类原则,识别出5大类23种岩性;根据火成岩的结构、构造和特征岩性,将岩相划分为6相16亚相;按成因将火成岩储集空间分为7种类型9种亚类。通过研究认为岩性、岩相是影响火成岩储层储集性能乃至含油气性的主要因素。火成岩油气成藏的主控因素为烃源岩、储层、构造运动;成藏模式有构造成藏模式、岩性成藏模式、构造—岩性成藏模式3种。通过对火成岩岩性、岩相、储层、成藏的研究,为辽河盆地东部凹陷今后的勘探部署奠定了良好的基础。

Based on the principle of three- level classification of lithology such as diagenetic model,chemical composition,and structure and mineral,etc.,the igneous rocks was identified as 5 main classes and 23 types of lithology. According to the texture,structure and characteristic lithology,the igneous rocks were divided into 6 lithofacies and 16 subfacies.The reservoir spaces were divided into 7 categories and 9 subclasses by the genesis of the igneous rocks. It is considered that the lithology and the lithofacies were main facors controlling reservoir performance and oil- bearing properties. Hydrocarbon accumulation in igneous rocks was mainly controlled by source rock,reservoir and tectonic movement. Three types of reservoir- forming patterns mainly consist of structural,lithological,and structural- lithological patterns. The studies on lithology,lithofacies,reservoir,and accumulation of igneous rocks have laid a good foundation for future exploration in eastern Sag of Liaohe Basin.