胜坨油田坨7块沙二段91夹层随机建模研究

以胜坨油田坨7断块沙二段9¹层为例，进行夹层三维空间分布随机建模研究，以探索夹层分布与剩余油分布关系。综合研究区内的钻井、测井资料，共识别出泥质夹层、钙质夹层和物性夹层3种夹层。通过对各种模拟方法进行对比研究和分析，优选序贯指示模拟方法在研究区内建立夹层三维空间分布模型。模型分析显示，钙质夹层分布范围最广，泥质夹层次之，物性夹层最少。泥质夹层平均厚0.6m，延伸距离50～105m，分布面积一般为0.01～0.05km2，分布密度范围为0.11～0.63m/m，分布频率范围为0.52～1.24个／m；钙质夹层平均厚0.4m，延伸距离40～180m，分布面积一般为0.01～0.08km²，夹层分布密度范围0.15～0.76m/m，分布频率范围为0.61～1.39个／m；物性夹层分布范围小，数量少，对剩余油产生作用小。在2-163、3-33、5-228、4-10、7-221、5-213等井区，剩余油饱和度较高。在这些井区剩余油富集。

Factors Influencing Economic Production of Oil and Gas-fields and Measures to Promote Production

The 91 layer，segment 2 of Shahejie Formation，Tuo 7 fault block，Shengtuo Oilfield is taken as an example，3D spatial distribution stochastic modeling of the interlayers is studied in order to find the relationship between interlayers distribution and remaining oil distribution.On the basis of geologic setting，an integrated study is conducted，with well drilling data and logging.Three interlayers types which include muddy interlayer，calcareous interlayer and physical property interlayer are confirmed.A 3D distribution modeling for interlayer is developed by sequential indicator simulation method.The model analysis reveals the distribution range of calcareous interlayer is the greatest，the distribution range of muddy interlayer is in the middle.The average thickness of muddy inter layers is 0.6m，the extending distance is 50-105m，and the distribution area is 0.01-0.05km 2.Interlayer distribution density is 0.11-0.63m/m，distribution frequency is 0.52-1.24layers/m.The average thickness of calcareous interlayers is 0.4m，the extending distance is 40-180m，and the distribution area is 0.01-0.08km2.Interlayer distribution density is 0.15-0.76m/m，distribution frequency is 0.61-1.39layers/m.There are many interlayers in 2-163，3-33，5-228，4-10，7-221，5-213 well areas，where