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在陕甘宁盆地范围内发育着数千米厚的上元古界(震旦亚界)——下古生界地层,在这套地层中是否能找到大油气田是人们经常思考的一个问题。近年来,随着对该套地层科研工作的逐步开展,人们的认识也在不断深化。但要较准确地回答这一问题,还需进行大量艰苦细致的工作。本文试图对已取得的各种资料加以综合分析,来探讨今后在该套地层中寻找油气的方向。下面从五个方面加以讨论: 一、上元古代——下古生代时,在盆地范围内是否有较深的海相沉积拗陷存在,其位置在那里?
In the area of the Shaan-Gan-Ning basin, a few thousand meters thick Upper Proterozoic (Sinian sub-boundary) - Lower Paleozoic strata are developed. Whether or not large oil and gas fields can be found in this formation is a problem that people often think. In recent years, with the gradual development of this set of stratigraphic research, people’s understanding is also deepening. However, to answer this question more accurately, a great deal of arduous work needs to be done. This article attempts to make a comprehensive analysis of all kinds of information that has been obtained to explore the direction of looking for oil and gas in the set of strata in the future. Here are five aspects to be discussed: First, the Upper Proterozoic - the Lower Paleozoic, in the basin there is a deep marine sedimentary depression exists, where is it?