Seismic Interpretation And Reservoir Prediction Of Ao 158 Block,fuyu Reservoir

Ao 158 block is located in the Songliao basin in the central depression area of Daqing Changyuan secondary tectonic belt on the southern tip of Aobao tower structure.Previous studies have shown that the block has great exploration potential, but the blocks in Fuyu reservoir sandstone superimposed on the longitudinal and transverse phase change fast,complicated oil and gas distribution.By making synthetic seismogram, horizon calibration set up sequence stratigraphic framework, Completed Aobao tower oilfield Ao 158 blocks of 6 reflector(FI points up,middle and down; FII points up, down, The bottom of the FII)of 3D fine structure interpretation, analysis of structure of each reflector and the developmental characteristics of fracture. On this basis, according to the set of attributes optimization and analysis of sand layer can qualitatively predict sandstone plane change tendency. Through the rock physics analysis, determine the sensitive parameters in the study area, the optimization method for reservoir prediction in the region, with well seismic joint post-stack inversion of geostatistics,According to the five sandstone groups(FI points up, middle and down; FII points up and down) in Fuyu reservoir sedimentary characteristics and reservoir characteristics research,predict the sandstone group and the regularity of sand body distribution, and in view of the major reservoir, to carry out the major reservoir tracking, describe major reservoir space distribution of sand body morphology, identification of various traps; By source analysis,analysis of sedimentary evolution, sedimentary facies marks recognition and the division of sedimentary subfacies and microfacies, single well sedimentary facies analysis, classification recognition of a sand formation sedimentary facies plane distribution rule.Through to the Ao 158 block in Fuyu reservoir seismic interpretation and reservoir prediction analysis study of sedimentary and reservoir characteristics are achieved: Fuyu oil layer FI, the main tectonic style of FII reservoir group has three types:(1) the ladder structure style,which mainly distributed in the northeast of blocks;(2) the graben structure style,mainly distributed in the southeast of blocks;(3) the floweriness structure styles, mainly distributed in the west of blocks; Broken in fuyu oil layer FI, FII reservoir group of faults mainly has two phases: a. First of the Qingshankou period of the end of the formation of the fault, mainly distributed in the periphery of block, east, north and southwest; b. First of the Qingshankou formation period of the late, late to activity fault, mainly distributed in the block in the middle of the body; On the basis of current tectonic framework in the study area Ao 158 blocks can be roughly divided into the western fault terrace zone, Ao 158 broken nose area,gentle slope in the middle area, southeast sag area, northeast fault terrace zone 5 area; The study area is mainly controlled by the southern provenance, shallow water delta sedimentary,reservoir mainly for water, underwater distributary channel and distributary channel sand body and so on. Fuyu oil layer on the longitudinal water becomes darker on the overall evolu-tion, sedimentary microfacies types by gradually transition to underwater distributary channel,distributary channel are nearly NS-trending distribution; The study area mainly development structure reservoir and development structure reservoir development of two types;Advantageous area mainly concentrated in the F1 s sandstone group Ao 158 broken nose area Pu 403 wellblock and gentle slope zone in central Pu 406 Wells wellblock.