华庆油田H201延8油藏小层划分方案及地质意义

Small layer division scheme and geological significance of H201 Yan8 oil reservoir in Huaqing Oilfield

在充分吸收前人对H201延8油藏的地质认识的基础上,结合新、老井资料对研究区标志层及各小层电性响应、岩性组合、沉积旋回特征进行深入研究,基于以上研究成果将研究区内的延8地层重新划分为延81、延82、延83三个小层,利用划分结果绘制地层剖面及构造图,对地层厚度及平面展布特征进行了研究。其中,延8地层整体厚度介于27~42m之间,各小层间厚度相差不大,平面上整体呈现东高西低的趋势,北部较南部坡降大,内部发育局部微构造高点。

On the basis of fully absorbing previous geological understanding of the H201 Yan8 oil reservoir,combined with new and old well data,in-depth research was conducted on the electrical response,lithological combination,and sedimentary cycle characteristics of the indicator layer and each sub layer in the study area.Based on the above research results,the Yan8 formation in the study area was re divided into three sub layers:Yan81,Yan82,and Yan83.Using the division results,stratigraphic profiles and structural maps were drawn,and the thickness and planar distribution characteristics of the strata were studied.Among them,the overall thickness of the Yan8 formation ranges from 27-42m,with little difference in thickness between each small layer.On the plane,the overall trend is high in the east and low in the west,with a larger slope in the north compared to the south,and local micro structural high points developed internally.