柴达木盆地西部地区盆山接触关系研究

Study on basin-mountain contact pattern in western Qaidam Basin

陈袁¹ 牟中海¹ 马达德² 李文龙¹ 林伶¹ 李乐¹

西南石油大学资源与环境学院，四川  成都  610500 中国石油青海油田公司勘探开发研究院，甘肃  敦煌  736202

College of Resources and Environment, Southwest Petroleum University, Chengdu 610500, China Research Institute of Exploration and Development, Qinghai Oilfield Company, PetroChina, Dunhuang 736202, China

通过对柴达木盆地西部地区地震剖面的对比及露头资料的研究，认为研究区不同区域、不同时代的盆山关系具有很大差异。阿尔金山与盆地的接触关系主要为断层接触和超覆接触，在红沟子以北地区为下断上超式接触，其中月牙山地区呈典型的半花状断层接触，红沟子及其以西地区为超覆接触。昆仑山与盆地的接触关系在中生代主要呈正断层接触，但在阿拉尔、斧头山地区为超覆接触；在新生代主要为高角度逆断层接触，其中昆仑山前中西段与东段之间为右旋走滑断层接触。深刻认识阿尔金山、昆仑山与盆地的接触关系，对于油气资源的勘探和开发具有重要意义。

According to the research of seismic profile contrast and outcrop data in western Qaidam Basin, it is believed that the relationship between basin and mountain presents a great difference in different regions and different periods in this study area. The contact relationship between Altun Mountains and basin is mainly the fault contact and overlap contact. Contact pattern in the northern part of Hong Gouzi Area shows a lower-fault and upper-overlap type. Typical half-flower fault contact presents in the area of Yueya Mountains, and overlap contract relationship appears in Hong Gouzi and in the western parts of its. The contact pattern between Kunlun Mountains and basin shows the normal fault contact in Mesozoic, but the contact pattern shows the overlap contact in Alar and Futou Mountains region. Basin-mountain pattern is mainly thrust fault contact in Cenozoic. Right-lateral strike-slip fault contact is between the middle-western part and eastern part in front of Kunlun Mountains. Profound understanding on the contact pattern of Altun Mountains-Qaidam Basin and Kunlun Mountains-Qaidam Basin is of great significance in the oil and gas exploration and development.

10.6056/dkyqt201204002