济阳坳陷罗151井区火成岩储层岩石学特征

Lithology Characteristics of Igneous Rock in Luo 151 Well-Block

通过岩芯观察、薄片鉴定、电镜扫描等方法,从岩石学特征、储集空间类型、孔隙结构类型等方面详细研究了辉绿岩油藏储层的岩石学特征。指出储集岩为辉绿岩和以硅灰石为主成分的角岩,储集空间类型主要为硅灰石角岩的微孔隙、辉绿岩的溶蚀孔洞-裂缝,研究结果较好地指导了罗151井区的火成岩油藏勘探开发。

Well-block Luo 151 is located at the southern part of Zhanhua sag. An oil reservoir in diabase is discovered recently in Member S3 of lower tertiary in Jiyang depression. The diabase intruded along bedding planes in Member S3 in the late of the deposition period of Dongying formation and the middle of that of Guan Tao formation, and it made great change in the country rock. There are 2 kinds of rocks： igneous rock and metamorphic rock, they can be further divided into border subfacies, central subfacies and carbonaceous slate subfacies, hornfels subfacies respectively. By using drilling and thin section to analyze the characteristics of the four subfices, the porosity, permeability, and favorable reservoir distribution in the working area can be predicted.