Identification And Evaluation Method Of Geochemical Logging In Complex Oil-gas And Water Layer And Its Application In Huanghekou Sag Of Bohai

In this paper,in order to recover hydrocarbon loss of cuttings in the different horizon,analyzing the drilling fluid additives,cleaning cuttings,empty time hydrocarbon loss,and dry and wet sample.At the same time,through the cutting rock and the sidewall coring pyrolysis data,the hydrocarbon loss formula is established.To identify oil property in the reservoir,oil-gas-water interpretation plate is established.Using rock pyrolysis analysis parameters S1/S2 and gas chromatographic spectrum diagram of thermal evaporation hydrocarbon,and pyrolysis parameters pictures to identify the nature of the crude oil.The oil type of Huang Hekou sag is intermediate mass,and only heavy oil is found in the central uplift belt.Vertically,the oil type changes from heavy to intermediate oil from top to bottom.The oil type of Ming Huazhen group is intermediate and heavy.The oil type from Guantao to Shahejie group.To identify fluid property in the reservoir,the oil and gas layer interpretation chart is established.Using conventional heavy oil interpretation plate of the rock pyrolysis,oil,poor oil,oil-water and water layer boundary in Minghuazhen group is obvious.The oil-water interface in Guantao group is obvious,but oil and poor oil has less data and relatively concentrated distribution.The boundary of oil-water layer and water layer is obvious in Shahejie group.Using conventional intermediate oil interpretation plate of the rock pyrolysis,oil-gas and water is obvious in Minghuazhen group.The oil and oil-water boundary is not obvious,but oil and gas one is obvious in Guantao group.And the boundary is obvious in Dongying group.Using PCA method to reduce the dimension of five pyrolysis parameters,interpretation chart is mapped.Light hydrocarbon interpretation charts use mathematic dimension reduction method to analyze intermediate oil obviously.Thermal evaporation hydrocarbon component interpretation chart for light-intermediate-heavy oil calculate the peak area and select the appropriate parameter combination to map oil and water interpretation chart,and its effect is obviously.In order to improve the conformance rate of oil and gas water interpretation,the actual application effect of each chart is analyzed.In the Rock pyrolysis application effect analysis,actual effect is not obvious due to pollution of oil-water layer.The chart effect of heavy oil is good in Guantao group.The application effect is not so good in Dongying group.In the Light hydrocarbon component application effect analysis,the dimension reduction interpretation chart of intermediate oil is better than conventional one.In thermal evaporation hydrocarbon application effect analysis,validation effect of the intermediate and heavy oil interpretation chart is better.