摘要
采用钻/测井、地震及自然伽马能谱测井的方法,对柴达木盆地跃进斜坡区下干柴沟组进行了高分辨率层序地层研究。下干柴沟组可分为上下两段,可识别出9个层序界面,进而划分出8个四级层序。根据岩心观察认为柴西南跃进斜坡区为辩状河三角洲沉积,研究区主体处于辩状河三角洲前缘相带。结合砂体展布、构造及地震反演,在下干柴沟组层序Ⅲ预测2个可能的岩性圈闭有利区带,是进一步勘探的有利目标。
Sequence stratigraphic studies with high resolution were carried out in the Lower Ganchaigou Forma- tion in the Yuejin Slope of the Qaidam Basin by means of drilling/logging, seismic and natural gamma ray spec- trometry logging methods. The Lower Ganchaigou Formation was divided into 2 sections vertically. 9 sequence boundaries and 8 fourth-order sequences were identified. Based on core observation, the Yuejin Slope was a braided-river delta, and the study area was mainly of braided-river delta front facies. Combined with the studies of sand body distribution, structure and seismic inversion, 2 possible favorable zones of lithologic trap were pre- dicted in sequence Ⅲ of the Lower Ganchaigou Formation.
出处
《石油实验地质》
CAS
CSCD
北大核心
2012年第4期383-387,394,共6页
Petroleum Geology & Experiment
基金
中国石油天然气股份有限公司科技重大专项“柴达木盆地油气勘探开发关键技术研究”(07-01Z)资助
关键词
层序地层
有利目标
下干柴沟组
始新统
跃进斜坡区
柴达木盆地
sequence stratigraphy
favorable target
Lower Ganchaigou Formation
Eocene
Yuejin Slope
Qaidam Basin
