Geological Comprehensive Evaluation And Potential Analysis In Hong168-171Well Block, Southern Of Songliao Basin

Hong168-171wellblock is located in the HongGangstructuralterrace which is in thecentral depression area ofsouthern Songliao basin.The work area has experienced multiphasetectonic evolution.Atpresent,the basic geological work is weak in this area.The minorfaultdistribution is very intensive and the structure is complex in this block.Common methodsfor geological analysis alone cannot correctly explain structure analysis work,so we needtorely on advanced seismic interpretation software to work for fine structure interpretation ofthe fault block area.In the stratigraphic correlation,we use lithology comparison method,cycle correlation method, etc tosystemly comparethe connected layer of the old and newarea.This will make sure that the consistency of the geological stratification in the study areaand the old area.Acoustic wave synthetic seismogram、log and lithologic combinationfeaturescompared with seismic reflection characteristics are mutual supporters.They jointedto determine the accurate reflection position of each phase axis, in order to achieve thepurpose of accurate calibration. Multi-well calibration is on the basis of single-wellcalibration to pull any line on the workstation for analysis comparison.On the one hand thismeansis to check whether single-well calibration of the seismic geologic horizon has goodconsistency; On the other hand, using this method to help part of the complicated Wellsdrilling stratification and comparison or hard layer which has not obvious stratigraphiccorrelation features, in order to make the regional seismic geological horizon is unified.The study area is located in the fault terrace zone of the HongGang anticlinestructure.The area has complicated geological characteristics.So we should comprehensivelyapply the related technology，the new3d seismic data of macro control guided by the theoryof sequence stratigraphy and Earthquake in combination with drilling to find out thecorresponding sedimentary discontinuity as contrast boundaries of the stratigraphicclassification. On the basis of stratigraphic characteristics the paper research on sedimentarycharacteristics of reservoir in the area, build well the relationship between the shock.To set upStructure model, first using standard layer as a unit for fine structure interpretation andimplementation of the trap. Integrated application of3d seismic data post-stack timemigration processing technology、sequence identification technology、 fine calibrationtechnology、time slice-coherent slices-multiple attribute extraction technology and analysisof3d visualization technology are used for interpretation of fine sand body and fine depictthe plane distribution of sand body characteristics, understanding of fracture system in the plane and three-dimensional space distribution from the shallow to the deep and the directionof the development. Then useing arbitrary line、shaft line and any line to grasp the changesof regional strata and faults. Then obtaining accurate deep fine horizon calibration andinterpretation data, control horizon interpretation accuracy, combining seismic interpretationand drilling data, to establish velocity field, finally structure mapping. On the basis ofcompleting structural interpretation and sand body space distribution, we can find favorableoil and gas target. On the basis of the predecessors and the drilling data and seismic datalogging data interpretation，applying the theory and method of the oil and gas geologytectonics, using dynamic and static shock combined with flat profile control well combinedwith the working method, in the work area of the reservoir structure meet under the premiseof clear, the Hong168-171fault block zone oil and gas distribution, comprehensiveevaluation of favorable target area.