The Geological Modeling Of The Third Member Of FuNing Formation In Yuduo-huazhuang Area Of Qintong Sag

The Qintong Sag is a secondary structural unit of the Dongtai Depression in the Subei Basin.The Yuduo-Huazhuang area in the study area is located in the western slope zone of the Qintong Sag.Aiming at the exploration and development potential of the third member of Fu Ning formation in the Yuduo-Huazhuang area of the Qintong Depression,this paper uses sequence stratigraphy,reservoir geology and sedimentology as the main theoretical research basis,and uses computer technology and 3D geological modeling software As a means to maximize the use of drilling,geological and logging data,the reservoir geological modeling of the third member of Fu Ning formation in the Yuduo-Huazhuang area was carried out.(1)According to the principle of sub-layer comparison and division,the cycle-thickness contrast layering method is used to finely divide and compare the oil layers in the study area,and complete the comparison and division results of 4 sand groups ?,?,?,and ?,with a total of 18 small layers.The sand group ? is divided into5 small layers from top to bottom;the sand group ? is dominated by mudstone with a thickness ranging from 30 to 36m;the sand group ? is divided into 7 small layers from top to bottom,and the sand group ? is divided from top to bottom.The bottom is divided into 6 small layers.(2)The logging data was processed and interpreted for 33 wells in the work area,and the physical properties and oil-bearing data of each single well in the study area were obtained.Compared with the new interpretation results for the oil test interval,the coincidence rate reached 73.7%.(3)Using sedimentological techniques and analysis methods,study the regional distribution characteristics of sedimentary microfacies in the third member of Fu in the Yuduo-Huazhuang area,and divide the delta front and predelta subfacies into six sedimentary microfacies.That is,underwater distributary channel,distributary bay,estuary bar,remote sand bar,sheet sand and pre-delta mud microfacies.(4)Finally,the stochastic modeling method is used to perform 3D geological modeling of the reservoir.The porosity,permeability and saturation model is established.From the model,the porosity,permeability and oil saturation of the ?-6 layer are the highest,and the porosity,permeability and oil saturation of the ?-6 layer are the lowest.The geological modeling effect of the third member of Fu Ning formation reservoir is good,which provides a geological basis for the follow-up research in this area.