Structural Interpretation And Reservoir Prediction Of Triassic Baikouquan Formation In Madong Slope Area

Seismic exploration is the most important method of oil and gas exploration,since the birth of seismic exploration,the accuracy of oil and gas exploration has been gradually improved,the exploration objects also develop from the structural hydrocarbon reservoirs to the subtle lithologic hydrocarbon reservoirs.Depicting the trap by structural interpretation,the reservoir characteristics can be described by seismic inversion,combining the two results,we can get the oil-gas nature of oil and gas reservoirs and complete the work of oil and gas exploration.In the Mahu sag,large reserves reservoir has been found in the Triassic Baikouquan formation in the Mabei and Maxi slope areas.The Triassic Baikouquan formation is located in the delta front facies belt,it's difficult to characterize the boundary of high quality reservoirs because of the complex structure and the interlaced distribution of sandstone and mudstone.There are many wells drilled to the target layer,due to the low structural position or weak lithology,the results of test are mostly water or oil bearing formations.However the Da 13 well has obtained high-yield industrial oil flow in the target layer,it shows that there is a large-scale reserve area in the Muhu sag.Multiple breaks have been developed in the Da 13 work area due to the tectonic activity.This paper will use 3-D fine structure interpretation and seismic attribute techniques tracing the layers and faults.And the lithology is complex in Da 13 work area,high quality reservoirs and dense layers are difficult to distinguish.This paper will identify impedance information and use wave impedance inversion to determine high quailty reservoirs.This paper will carry out structural interpretation and reservoir prediction for the Da13 well area from two main aspects of structural interpretation and seismic inversion combined with geology,logging and drilling information.Then we can get the basic law of Madong slope hydrocarbon accumulation,and obtain the guiding opinions for seismic exploration in this area.