Study Of Sand Prediction Using Well-Seismic Combined In Middle Block Of Eastern Zone In Xingbei Oilfield

Eastern transition block of Xingbei oilfield in Daqing Oilfield located in the south of Daqing anticline east wing,only the basis and once infilling well pattern were deployed currently,the exploitation level is lower.Because of the low density of well pattern,the awareness of construction and reservoir status underground is low.Therefore,this topic carried out the well seismic combined research of river sand body predict in the xingbei eastern transition block inner front facies reservoir. Firstly, using well seismic combined technology recognize the Spatial distribution characteristics of faults and the situation of micro-structural development, finally build the three-dimensional structural model. On this basis, cross using seismic attributes, pixel-based analysis, frequency spectral decomposition and seismic inversion method to predict the reservoir characteristics of Xingbei eastern transition block.This paper mainly used well seismic combined explanation,seismic inversion,seismic attributes technologies,performed a more detailed characterization on the structure and reservoir characteristics of study area,and established a set of well seismic combined prediction method that fitting the Xingbei oilfield reservoir conditions.In terms of structure description,the seismic horizons,faults and micro-structures are newly recognized by well seismic combined explanation,and formed a three-dimensional structural model. In terms of reservior description,based on the control of unit-level seismic horizons,comprehensive extraction of common amplitude,spectral decomposition and pixel-based seismic attributes.Using frequency compensation and Amplitude difference methods reconstruct the curves, and calculated two kind of High resolution inversion date.The seismic attributes short on reflect sand details,but more reflects the rule of macro sand distribution,used on the outer transition block. The seismic inversion reflects more sand details,and formed two kinds of invertion date which for the main sand and effective sand respectively.However,due to lack of well date in the outer transition area,the sand prediction accuracy reduced significantly,suitable for inner transition area sand characterization.Through the integrated application of two technologies,established a set of well seismic combined prediction method that fitting the Xingbei oilfield transition area,prociding objective and fully reservoir characterization consequents to the integrated program adjustments and further potential excavation. Especially for the low well pattern or the low mining degree areas have an important guiding significance.