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