| Early as 1960s , Daqing periphery oilfield has started exploration , there are totally 22 oilfields had been found 。With the development of exploration and exploitation , the difficulty of finding new exploration and exploitation areas are becoming even harder . The outstanding characters of periphery oilfield is that the structure is complex , the faults distribute densely , the distribution of sand is not steady , the physical characters of layers are not good , the distribution of water and oil is confusing . Xujiaweizi oilfield is the typical periphery oilfield in Daqing , which has done simulating seismic survey , 2D seismic survey and 3D seismic survey , the oilfield had put into production in 1995 , 2001 and 2002 respectively , the production experience of three low oilfield , both in the domestic and overseas oilfield , has indicated that we can not know a complex lithology reservoir thoroughly by the first sight and we can not solve all the problems during the exploration , we should apply rolling production with the combination of exploration and exploitation , only in this way can we familiar with the complex geology circumstance of the oilfield and find out an effective way to combine the exploration and exploitation , which has important effect for the later exploration and exploitation。 the purpose and effect of the study The periphery oilfield in Daqing has applied rolling exploration and production , we study and product the oilfield step and step , with the development of software and hardware , continuous study and practice , we can find and product more geological reserve which has been thought not economical and its reservoir condition is not confirm by the judgment according to the early technology , which has made it possible to maintenance high and steady production of Daqing oilfield 。 According to the geological characters of low porosity , low permeability and thin layer of periphery oilfield in Daqing , take the example of Xujiaweizi oilfield , we have applied multi-well inversion technology in the stage of drilling and exploitation of the oilfield , on the basis of high resolution production seismology and logging information of the newly drilled wells , we have predicted the lithology at the same time of drilling wells in the new oilfield , with the adjusting well location to direct where to drill wells , we have succeeded in the drilling and production of the oilfield 。Xujiaweizi oilfield is located in the extend position of Shengping nose structure of Sanzhao depression stretch southward , the main target layer is Putaohua , in the july , 1976 , according to the oil testing , Xu1 well producted 26.087d/t crude oil , which indicted the discovery of the oilfield , in 1995 , we have designed 174 production wells and drilled 19 wells first , among them 5 wells were abandoned , 9 low effective wells whose oil-bearing sand thickness is less than 2m , the successful drilling rate was only 73.7% , the proportion of low effective wells is 57.1% , which was a big challenge of exploitation at that time , since 2000 , we have studied the oilfield thoroughly to exploit and develop Xujiaweizi oilfield and increased the drilling successful rate , we have finished the processing and interpretation of the seismic data , ensured the quality of processing by optimized the parameter and workflow , wavelet shaping , STOLT migration and other advanced processing technology , we have applied new interpretation technology in the study , which included Jason inversion software , Voxelgeo visualizing software and Stratimagic seismic phase analyzing software , followed the principle of rolling exploitation and production and directed the well position , we have increased the successful drilling rate greatly 。 With the foresaid method , we have studied the structure pattern and reservoir lithology for the second time and succeeded in the drilling and exploitation of the oilfield , which has a pilot effect for the production of Daqing oilfield 。plan and method of the s...
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