摘要
塔河油田四区以缝洞型油藏为主,裂缝是该区主要的油气疏导体系和储集空间,通过20余口井的岩心、薄片观察,结合FMI等各种分析化验资料,研究了裂缝的倾角、走向、长度、体积密度等几何参数,分析了裂缝的充填情况。在此基础上分析了控制裂缝形成的主要因素,包括构造作用、岩性、先期断裂、岩层结构等;探讨了裂缝形成的期次,将裂缝划分为四期I.前加里东期,II.加里东期、III.海西早期、IV.海西晚期—喜山期;进一步分析了裂缝形成的动力学过程。
The fissure-pore carbonate reservoirs constitute the dominant Ordovician reservoirs in No.4 block of the Tahe Oilfield.The fissures make up the main connection channels and accumulating space.Based on core and thin section observations for more than 20 wells in combination with FMI and analysis of a variety of test data,this paper studied a certain characteristic parameters of reservoir fissures,such as the ranges,strikes,lengths and bulk densities of the fissures,and analyzed their filling situation.On such a basis,the controlling factors were analyzed,which included structure,lithology,former faulting,rock structure and the stages for the formation of the fissures.The fissures are assigned to four stage：I-Pre-Caledonian period,II-Caledonian period,III-Early Hercynian period,IV-Late Hercynian-Himalayan period.The genetic mechanism of the fissures are also discussed.
出处
《中国地质》
CAS
CSCD
北大核心
2009年第6期1257-1267,共11页
Geology in China
基金
国家重点基础研究发展计划(973计划)项目(2006CB202401)资助
关键词
塔河四区
裂缝特征
体积密度
主控因素
No.4 block of Tahe characteristics of fissures bulk density controlling factors
