濮城油田南区沙二上2 3砂层组油藏构造应力场演化与油气聚集

本文以濮城油田南区沙二上 2 3砂层组为例，用有限元法模拟了该区沙二期、东营期及现今期构造应力场。研究结果表明：平面上，应力低值区分布具明显规律性，主要受断裂分布控制，低应力值区与目前已证实和开发的油气藏富集区分布基本一致；垂向上，地质年代越新，地层埋深越浅，应力场强度降低。该应力场分布特征规律有利于油气自东向西运移，自深向浅运移或沿地层上倾方向运移，并在断层封闭部位聚集形成断块油藏。

Evolution of Tectonic Stress Field and Hydrocarbon Accumulation Of Es2upper2 3 Reservoirs in the South Region of Pucheng Oilfield

Based on the Es2upper2+3 member of the south region of Pucheng oilfield,Es2 stage is simulated.Dongying stage and present tectonic stress field in this area with finite element method.Studies show that:in lateral direction,regularly distributing,low stress area is mainly controlled by fractures,and is consisitent with hydrocarbon-rich region,which is authenticated and developed;in vertical direction,as geological age gets younger,the layer is buried shallower,stress field intensity lower.That distributional...