摘要
库车坳陷大北地区是塔里木盆地异常高压较发育的地带,该地区古近系至白垩系(关键层位)的异常高压是钻井常常遇到的难题。通过检测大北地区古近系至白垩系的异常高压分布特征发现:南天山构造运动形成的挤压应力作用和该地区白垩系—古近系盐岩发育是造成大北地区这些层位异常高压的两大主要因素。结合整个克拉苏构造带的地质构造发育特点和关键层位的岩性构成情况,分别对这两大主要形成机制进行了详细的解释分析。
The Dabei area of Kuqa depression is an abnormal pressure well developing zone in Tarim basin.The abnormal pressure encountered by drilling occurs from the Paleogene to the Cretaceous as key strata.The detecting the abnormal pressure distribution characteristics of Paleogene-Cretaceous suggests that the tensile stress effect formed by South Tianshan tectonic movement and the developed salt rock in the key strata are two important factors for forming such an abnormal pressure in this area.Combining geological structure feature with the lithologic composition of the key strata in Kelasu structural belt,this paper presents the detailed analysis of the formation mechanism of the two great factors,respectively.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2011年第4期370-372,共3页
Xinjiang Petroleum Geology
基金
中石油国家重大专项(2008ZX05021)
关键词
库车坳陷大北地区
白垩系
古近系
新近系
异常高压
形成机制
Kuqa Dabei area
Cretaceous
Paleocene
Neocene
abnormal pressure
formation mechanism
tectonic stress
salt rock
