利用岩矿记忆信息恢复基岩潜山裂缝储层形成的机制  

The Use of Rock and Mineral Remember Information to Recall the Dynamics of Buried Basement Rock Hill Fracture Reservoirs

作　　者：傅强[1] 王家林[1] 周祖翼[1] 

机构地区：[1]同济大学海洋地质与地球物理系,上海200092

出　　处：《地质论评》1999年第4期434-438,共5页Geological Review

基　　金：石油大学(北京)盆地研究基金;油藏研究中心博士研究基金(K9702)

摘　　要：基岩储层具有当今油气储层研究的两大难题,即特殊且致密的基质岩性和储集空间。变质岩作为基岩岩性之一,其储集空间——裂缝的形成与动力作用密切相关。构造动力是致密基岩产生裂缝的主要因素,岩石矿物将记忆其在地质历史过程中所经历的动力特征。在准确采取定向岩心的基础上,利用声发射技术(AE)和岩组学方法可以恢复基岩储层在地质历史过程中所受应力期次和应力方向,从而了解储层的动力机制。应用上述原理恢复辽河大民屯凹陷曹台变质岩潜山受到三期应力作用,潜山南北两端受近EW向挤压应力,而潜山中部受NE向压剪应力。储层裂缝发育和分布与潜山所受动力机制一致。There are two difficult problems in basement rock reservoir research today; they are special tight lithology and fracture reservoir spaces. The reservoir spaces - fractures - in metamorphic rocks as a kind of basement rocks are closely related to dynamics. Tectonic dynamics is the main factor of forming fractures in tight basement rocks. The rock and mineral will remember the dynamics in the geological history. Based on the oriented core, the episodes and directions of dynamics in basement rock reservoirs may be recalled by the acoustic emission (AE) and petrofabric analysis. As is reconstructed using the above-stated principle, the Caotai metamorphic buried hill in the Damintun depression, Liaohe, was subjected to stresses of three episodes. The south and north ends of the buried hill were chiefly affected by nearly E-W compression, while the central part of the buried hill was chiefly affected by NE compression-shear. The development and directions of the fractures were in agreement with dynamics.

关 键 词：变质岩 裂缝 岩组学 岩矿信息 油气藏 储集层 

分 类 号：P618.130.2[天文地球—矿床学]