摘要
运用岩石地层学“最优分割”数值计算方法 ,对由于缺少古生物化石资料而长期难以进行地层划分的山东东营凹陷下第三系沙河街组四段至中生界“红层” ,进行了岩石化学性质差异的最优分割划分。结合有限的古生物化石资料和标准地层剖面的岩石学特征 ,将分割的层序进行了地层归属标定 ,成功地将“红层”各个层属及亚层属划分出来 ,其科学性、合理性已为之后的勘探成果所证实 ,同时在东营地区最深探井———郝科 1井的地层划分中得到了运用。该方法为缺少古生物化石数据的“哑地层”划分提供了一种新思路。
According to the difference in rock chemical property, the redbeds from E s 4 to Mesozoic in Dongying Depression which have not been divided for a long time because of lack of fossil are best divided by use of the 'best division' numerical calculation in petrostratigraphy. Combining the palaeontologic fossil information from a few stratum and rock property from standard stratigraphic profile, the divided stratum is determined for a standard stratum, and the sub\|stratum is also divided. The scientific and rational method has been proved by following exploration. Meantime, the method has been applied to stratigraphic devision of the deepest exploration well-Haoke 1 in Dongying Depression. The method is a new thought for dividing a barren\|bed which lacks fossil information.
出处
《地学前缘》
EI
CAS
CSCD
2003年第2期465-469,共5页
Earth Science Frontiers
