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地层埋藏史研究是借助计算机恢复地层古厚度,动态的再现盆地的沉积发育过程,同时也是含油气系统研究的核心内容,是研究油气的生、运、聚及成藏过程的基础和关键。埋藏史恢复的关键是恢复地层的厚度,即把一套地层的现今实测厚度恢复到沉积时或埋藏中某一时刻的厚度。通过已知的贝尔地区的砂、泥岩孔隙度,可以得出砂、泥岩孔隙度与深度的关系式。本论文对贝尔地区内所有井位进行研究,利用“回剥法”从现今的单井的分层数据出发,按地质年代逐层剥去,其间考虑沉积压实、剥蚀等地质事件,直至全部剥去为止,最终可以恢复出单井埋藏史。通过这个原理,编制相关程序,恢复出贝尔地区各时期厚度及埋深,分别做出贝尔地区各时期的古厚度等值线图和古埋深等值线图,从图中找出沉积中心和沉降中心。沉积中心与沉降中心基本重回的位置一般是油气大量生成的地方。
The study on the burial history of stratigraphy restores the paleo-thickness of the stratum by computer and dynamically reproduces the sedimentary development of the basin. It is also the core of petroleum system research. It is the basis and key to study the process of hydrocarbon generation, transport, accumulation and accumulation. The key to the recovery of the burial history is to restore the thickness of the formation by restoring the present measured thickness of a set of formations to the thickness at a time of deposition or burial. Through the known Belle region of sand, mudstone porosity, you can draw sand, mudstone porosity and depth of the relationship. In this paper, we study all the well positions in the Bel area, using the “back-stripping method” from the single-layer stratified data of the present day and stripping them by layers according to geologic ages. During the geological events such as sedimentation compaction and erosion, Until all the stripped so far, can eventually recover the single well buried history. Based on this principle, the relevant procedures were compiled to recover the thickness and depth of each period in the Bel area, and the paleo-contour maps and paleoblood contour maps were made for each period in the Bel area. The sedimentary centers and Settlement center. Sediment centers and subsidence centers are generally returned to the place where the majority of oil and gas generated.