Daqing Oilfield Songfangtun F135 Wellblock Putaohua Reservoir Oil And Water Distribution And Control Factors

Songfangtun Oilfield located in the northern Songliao basin,formed under the background of the bedrock protrusions in paleo central uplift zone of Sanzhao Depression.The fault segmentation effect of the study area is obvious,it results the study area of oil and water distribution complex.In order to optimize the area in the study area,it is necessary to study the oil and water distribution and control factors in the study area.On the basis of previous studies on the Putaohua Formation,according to the well logging data,we carefully explained the study area,and made a new understanding of the traps and faults in the study area.Then we established the high-resolution stratigraphic isochronal framework of the study area,and use the reservoir inversion technology,established seven kinds of sedimentary microfacies models.Draw 9 layers of the thickness of the sand layer in the study area,and summarized the plane distribution characteristics of the sand body and the vertical evolution rule.summarize the sedimentary facies planar distribution feature,the region's sand body plane distribution and vertical phase play features.On the base of the oil and water dissection in the whole area,three types of reservoirs were summarized:Fault block reservoir,fault lithologic reservoir,lithologic reservoir.The distribution of oil and water on the plane has the characteristics of zonation.The plane from west to east sag of oil-water in composite oil-rich oil-water transition zone with slope tectonic belt.From the vertical,the study area is mainly distributed in putaohua reservoir,conformed to the laws of oil to water,the structural high part rich oil,the structural low part rich water.In the study area,the continuous underwater distributary channel microfacies is the main oil and gas accumulation area,and when the sand is more than 0.4,the stratum is an excellent reservoir of oil and gas.In addition,the sanding matching also has a certain control effect on the distribution of oil and water.When the fault of the study area and the direction of the sand body are high angle,the oil and gas accumulation effect is better.