摘要
通过野外观察与描述,将库车坳陷逆掩断裂带内部划分为断裂岩、破碎岩和裂缝发育三个带,存在空腔、裂隙和连同孔隙三种输导通道。在断裂活动时期,断裂岩带和破碎岩带具有相对较高的孔渗性,天然气主要是通过裂缝扩张形成的空腔进行加速输导运移。断裂静止裂缝未充填期前,裂缝发育带具有相对较高的孔渗性,天然气主要是通过裂缝快速输导运移。断裂静止期裂缝充填期后,破碎带具有一定的孔渗性,天然气主要是通过其连通孔隙进行缓慢输导运移。库车坳陷天然气藏主要是通过断裂岩带和破碎带内部裂缝扩张形成的空腔进行输导运移形成的。
By field observation and description, Interior structure of overthrust fault is devided into faulted rock zone . crushed zone and fracture zone in the paper. There are three transporting passages of void cavity, fractures and connected porosity in overthrust faults respectively. In the active period of fault, faulted rock zone and crushed zone had relatively high porosity and permeability, gas migration was accelerative through the void cavity formed by expanding of fractures in faulted rock zone and crushed zone. From the still period of fault to the period when fractures were not packed, fracture zone had relatively high porosity and permeability, gas migrated quickly through fractures in fracture zone. After fractures were packed, crushed zone had some porosity and permeability; gas migrated slowed through pore in crushed zone. Gas reservoirs in Kuche depression were mainly formed by gas migration accelerative through the void cavity formed by expanding of fractures in faulted rock zone and crushed zone.
出处
《新疆石油天然气》
CAS
2005年第1期24-29,23,共7页
Xinjiang Oil & Gas
基金
国家重点基础研究项目(天然气高效运移输导网络物理模拟及地质模式
编号:2001CB209104)资助
关键词
库车坳陷
逆掩断裂
内部结构
输导特征
天然气
Kuche depression
overthrust fault
interior structure
transporting characteristics
gas
