Seismic Interpretation And Reservoir Prediction Of Heidimiao Formation In Ao9 And Aonan Area

The study area 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.Multiple of fault striking northwest cut the structure for multiple fault block.Heidimiao reservoir formation correspond nensan and nensi.Its sedimentary environment belong to delta front subfacies and subfacies of frontal fan delta and its sedimentary micro facies model is river channel,sheet sand and mouth bar.In order to satisfy the geological requirement this paper carry out structural interpretation and reservoir prediction.Take advantage of Seismic synthetic record base on sequence stratigraphy establish unify stratigraphic framework.In phase of seismic horizon interpretation,the automatic tracking technology the bypass line technology and the Stereo display technology are adopted to improve the accuracy of horizon.Except direct interpretation In the stage of fault interpretation it adopts coherence technology,surface slicing technology and attribute slice technology to enhance the precision of the fault interpretation.Seismic attribute indicates sand body distribution at the first stage of reservoir Prediction.After that geostatistics inversion contribution the mensurable sand body thickness The last comprehensive utilization of log facies,seismic attribute slice and the consequence of seismic inversion describe the sedimentary microfacies guided by the seismic sedimentology.On the basis of the above work,analyze main controlling factors of hydrocarbon accumulation determining reservoir type and then find out advantageous area.Through to structure interpretation and reservoir prediction of the heidimiao reservoir for ao9 and aonan area study get the following:The fault in the area have the characteristics of the formation and development at different periods,among them Formation of qingshankou formation period of faults and the long-term development of the large faults are the main petroleum migration pathways.The fault formated in the end of the mingshui formation can't communicate source rocks and damage hydrocarbon accumulation.There are four kind of traps in the study area including fault nose,faulted anticline,anticline structure,fault block which is the main trap types within the work area.Both seismic attribute slice and the seismic inversion results are displayed that the sand body of HI are well developed and another situation of HII within the study area.It develops NS-trending channel on HI with sheet sand on both sides of the channel and the sedimentary micro facies model of HII is sheet sand.