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德南洼陷沙三段 ( Es3 )油灶的低成熟度大大降低了德南洼陷的勘探成功率。泥岩压实曲线推测和油气显示资料表明 ,Es3 低熟油灶的油气初次运移主要指向沙四段 ( Es4 )储层。射线追踪法和探井油气显示资料表明德南洼陷油气再次运移分配主要受运移路线、距油灶的远近等因素影响。运移优选通道是近油灶的灰岩裂缝。综合研究认为该区的有利勘探层位是 Es4 ,有利圈闭位于近油灶的两个 类油气运移分配单元内 ,以灰岩中的砂层夹层为主要目标。
The low maturity of the Es3 oil cooker in the Denan sub-sag greatly reduces the success rate of exploration in the Denan sub-sag. Computation of mudstone compaction curves and hydrocarbon data show that the primary oil and gas migration of Es3 low-temperature cooking oil mainly points to Es4 reservoir. Ray tracing method and exploration well oil and gas data show that the re-migration and distribution of oil and gas in the south of Depression are mainly affected by such factors as the route of transport and the distance from the oil cooker. The preferred channel of migration is the limestone fracture near the oiler. The comprehensive study shows that the favorable exploration horizon in this area is Es4, and the favorable traps are located in two types of hydrocarbon migration and distribution units in the near-oil range. Sandstone interlayer in limestone is the main target.