渤海L油田不同类型三角洲地质建模

The Geomodeling of Different Type of Delta in Bohai L Oilfield

L油田主力层系为浅层明化镇组和深层沙河街组,明化镇组发育浅水三角洲而沙河街组发育辫状河三角洲,本文通过对这两种不同类型三角洲沉积特征的分析,研究了它们形成的油藏差异,浅水三角洲主要形成岩性油藏,而辫状河三角洲则形成构造层状油藏,在此基础上针对两种类型分别形成了不同的建模方法即基于单砂体的确定性建模和基于油组的随机建模,表征了不同类型三角洲的空间分布。

The main strata in L oilfield are Minghuazhen Formation and Shahejie Formation. Shallow water delta develops in Minghuazhen Formation and braided river delta develops in Shahejie Formation. Based on the analysis of sedimentary characteristics of two different types of delta, this paper studies the reservoir differences formed by them. Shallow water delta mainly forms lithologic reservoir, while Braided River Delta forms structural layered reservoirs. On this basis, different modeling methods are formed for the two types, deterministic modeling based on single sand body and stochastic modeling based on oil group, which characterize the spatial distribution of different types of delta.