The Channel Sand Prediction In Fuyu Reservoir On Bie Zhijing Area Of Songliao Basin

Jilin oil field the main oil concentration in the central depression in southern songliao basin and shallow（mainly includes: the quantou formation in fuyu oil layer, qingshankou formation high counter reservoir and yaojia putaohua reservoir）, resource potential, the shallow accumulation type is given priority to with lithologic or fault and lithology, advantage of reservoir prediction is one of the main control factors of reservoir forming, and the advantage of shallow reservoir in southern songliao basin mainly delta plain and front distributary channel and distributary sand body.In recent years, horizontal well drilling in sandstone rate is low, restrict the use of scale production, the main reason is the accuracy of reservoir prediction and drilling guidance project reasons. Therefore, in order to improve the single well production and reserves to upgrade and expand, will introduce a series of channel sand prediction technology loose in the south of shallow exploration and evaluation.In this paper, on the basis of original seismic data, through careful synthetic seismogram calibration and seismic geological system layer, the earthquake response of the identification of river sand body characteristics. If the seismic response characteristics is not clear, can use explanatory target processing（phase shift processing, well control treatment, and eliminate the strong reflection, etc.）, to further identify the earthquake response of the channel sand body characteristics, on this basis, using stratigraphic section, the amplitude attribute and inversion of statistics to estimate the channel sand body distribution.In fuyu reservoir Ⅰ sand group of distributary channel sand from T₂ formation interface is greater than the λ / 4 seismic performance for the complex wave characteristics, characterized by strong reflection characteristics, conversely matching pursuit algorithm can eliminate the strong reflection, reduction of distributary channel sand seismic response characteristics; Fuyu reservoir Ⅱ- Ⅳ sand groups of single sand body thicker, river multiphase superimposed, seismic reflection direction axis poor continuity, sand body response characteristic is not obvious, carry out explanatory goal processing to improve the resolution, on this basis, the application based on cloud transform inversion, reservoir physical property is to carry out the distribution of dense oil dessert, is advantageous to the deployment of horizontal drilling.In fuyu oil layer Ⅰsand group of channel sand distribution characteristics: source mainly comes from the southwest, belongs to delta front deposition, restricted by area in the study area, the underwater distributary channel to ns, and the development of the underwater distributary channel, more focused on the faulted anticline, channel sand thickness 3 to 8 meters, width 400-600 meters, mainly siltstone.Fuyu reservoir sand Ⅲgroup channel sand distribution characteristics: source mainly comes from the southwest, in the study area is a delta plain facies, distributary channel toward NE to NW, distributary channel superimposed, more overall all have distribution, channel sand thickness of 10-20 meters, width 300-1200 meters, mainly siltstone.