论文部分内容阅读
位于大庆中央拗陷区腹部的杜101井,在1700余米井下,首次发现保存完好的腕足类等多门类化石,经研究确认:腕足动物群属于天山-兴安沉积区早二叠世广泛分布的北山类群。从而肯定了大庆探区大面积中新生界之下存在正常沉积的海相下二叠统,说明松辽盆地北部盆地的基底为海西期浅层褶皱基底。这一发现不仅对松辽盆地二叠纪构造与生物古地理变迁机制等理论问题的深入研究有重要意义,也对大庆探区开展深部油气勘探,寻找新的油气接替层位提供了实际依据,应引起有关方面的重视。
The Du 101 well, located in the abdomen of the central depression in Daqing, is the first to find well-preserved brachiopods and other fossils under the well of more than 1700 meters. The study confirmed that the Brachiopod belongs to the Early Permian distribution in the Tianshan-Xing’an Sedimentary Zone Kitayama group. Thus, it is confirmed that there is a normal sedimentary marine lower Permian under a large area of Mesozoic and Cenozoic in Daqing exploration area, indicating that the basement of the northern basin of the Songliao Basin is a Hercynian shallow fold basement. This finding is of great significance not only for the in-depth study on the theoretical issues such as the mechanism of Permian structure and biological paleoclimatic change in the Songliao Basin, but also to provide a practical basis for carrying out deep oil and gas exploration in Daqing Exploration Area and finding new oil and gas replacement layers. Should draw the attention of the parties concerned.