东营凹陷太古界基岩储层主控因素分析

Analysis on main controlling factors of Archaeozoic base rock reservoir in Dongying Depression

张攀 胡明 何冰 荣毅 张明迪

西南石油大学;西南油气田分公司川中油气矿;西南石油局录井公司;西南油气分公司勘探开发研究院;

1.Southwest PetroleumUniversity, Chengdu 610500, China; 2.Central Sichuan Oil and Gas Field of Southwest Oil and Gas Company, SINOPEC, Suining 629000, China; 3.Logging Company of Southwest PetroleumBureau, SINOPEC, Mianyang 621000, China; 4.Exploration and Development Research Institute of Southwest Oil and Gas Company, SINOPEC, Chengdu 610000, China

东营凹陷太古界基岩储层为较新的研究对象,储层总体上孔隙度和渗透率偏低,属于裂缝性储层,因此对研究区储层主控因素进行全面分析,对于今后该类型储层的研究具有重要意义。通过岩心观察和岩石薄片鉴定得出认识,东营凹陷太古界基岩储层受到多种因素的共同控制,其中岩性为根本因素,构造运动为最主要的控制因素,岩浆侵入作用、物理风化作用、大气淡水淋滤、深层溶解作用是较为主要的控制因素,区域变质作用和矿物充填作用的影响相对较小。

Archaeozoic base rock reservoir in Dongying Depression is a new research object, which generally belongs to the fractured reservoir with low porosity and permeability. Therefore, a comprehensive analysis on controlling factors of reservoir in the study area has important signification for the future studies of this type of reservoir. Through core observation and rock slice identification, it concludes that Archaeozoic base rock reservoir in Dongying Depression is jointly controlled by many factors, including the fundamental lithology factors and the major tectonic movement factors, magmatic intrusion, physical weathering, atmospheric water leaching and dissolution of deep layer. The influences of regional metamorphism and mineral filling are relatively small.