柴达木盆地西部地区断裂类型及油气勘探意义  

The fault types and the implication of petrolic prospect in the west of the Qaidam Basin

作　　者：王亚东[1] 方小敏[1,2] 高军平[1] 刘栋梁[2] 张跃中[3] 张伟林[2] 

机构地区：[1]兰州大学西部环境教育部重点实验室和资源环境学院,兰州730000 [2]中国科学院青藏高原研究所盆地与资源环境研究中心,北京100085 [3]中国石油天然气股份有限公司青海油田分公司勘探开发研究院,甘肃敦煌736202

出　　处：《地质科学》2009年第3期957-965,共9页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家"973"重点发展计划项目(编号:2005CB422001);国家教育部重点项目(编号:306016);中国科学院重要创新方向性项目(编号:kzcx2-yw-104)资助

摘　　要：为研究柴西地区油气成藏及其与青藏高原隆升的关系，我们借助生长断层定性和定量分析，总结出该区断裂在演化上总体可归纳为两个主要形成时期和4种表现形式：早期形成时期（E1＋2-N2^1），中生代以来开始活动，多数终止于下油砂山组末（约14．9Ma）；晚期形成时期（N2^2-Q），上油砂山组开始活动，狮子沟组（约8．2Ma）以来活动尤为剧烈，持续至今。在形式上主要表现为限于下或上构造层的生长断层；贯穿下、上构造层的生长断层和后期断层4类。柴西地区的这种断裂构造特征，与青藏高原的分阶段隆升相对应，控制着该区的油气运移、成藏、保存及改造，对我们在柴西地区的油气勘探工作具有重大意义。Analyzing the growth fault abstractly and quantificationally is helpful to understand the forming of the petrolic resource in the western Qaidam Basin and the relation with the Tibet Plateau uplift. Two main forming periods and four presenting forms to the fault evolvement of the western Qaidam Basin are found. The main forming periods are E1＋2-N2^1 and N2^2-Q, the former started in the Mesozoic and ended at the Xia Youshashan formation（Fm. ） （ -15 Ma） , and the later started at the Shang Youshashan Fro., especially from the Shizigou Fro. （ - 8.2 Ma） to nowadays, the activity to the faults became strong rapidly. The four fault patterns are the primo growth fault develops in the lower tectonic layer,the secondary upgrowths in the upper tectonic layers, the third growth fault runs through the lower and upper tectonic layers, the fourth is subsequent one-off fault,which impenetrate the lower and upper tectonic layers. These faults in the western Qaidam Basin, corresponding to the phase uplift of the Tibetan Plateau, can control the petrolic transportation, accumulation, conservation and reconstruction, and conduce to petrolic prospection in the west of the Qaidam Basin.

关 键 词：柴西地区 青藏高原隆升 生长断层 构造层 油气成藏 

分 类 号：P542[天文地球—构造地质学] TE121[天文地球—地质学]