Seismic Attribute Technology Be Applied On Reservoir Prediction In Denglouku Formation And The Quantou Formation Of Changling Fault Depression

The study area Changling fault depression rift target layer Quantou and Denglouku group are deep clastic gas reservoirs under the tectonic setting,after the previous oil and gas exploration,the objectives of the zone layer gas reservoir has a great exploration prospects.However,the study area by multi-stage tectonic movement,fault development in the region,small faults,the fracture and the complex structure of clastic reservoir rocks,poor physical properties,porosity and permeability is low,heterogeneity is very,fluid Variation of obvious features,there are many limitations to reservoir prediction.Plus Shanggong region deep rift layer can make use of the less well data,and have been well to the uneven distribution of these will directly affect the resolution and accuracy of the inversion results bring great difficulties to the target area of the reservoir prediction.How to solve the defects of the work area and existing exploration data become the most crucial problem.Fully detailed study of seismic data,in this study it is believed that using seismic attribute extraction and analysis techniques can take of the advantage information fully,and provide a favorable basis for reservoir prediction of the target layer.In the practical work,based on Changling rift actual work area information,select in accordance with Landmark’s Poststack module,amplitude attribute,complex trace attributes,spectral statistical properties,the sequence of the statistical properties relevant statistical properties of the five major categories and 43 kinds of practical applications property,divide property and attenuation properties of the extraction and analysis.The following conclusions:Distribution in the work area of sandstone,sandstone facies,the level of favorable sandstone reservoir distribution and faults are more sensitive to the distribution of seismic attributes for the RMS amplitude,the maximum peak amplitude,average energy,the average reflection intensity,energy half-life,half-life energy slope,an average of the instantaneous phase,arc length,the correlation length,complexity of the signal,the main components of property.the sedimentary facies analysis indicate that this area of provenance from the southeast,southwest,northwest;favorable sand body in this area,and oil and gas distribution is mainly located in the northwest,southeast and central regions.compared to correlation length,the signal complexity,principal component attributes,combined with the seismic profiles can be used to predict the target layer section of the fault distribution.Divide property,Denglouku reservoirs are mainly distributed in the work area east and west and northern regions.Quantou reservoir is located in the northwest of the work area,south-east;scattered east and southwest.Quantou three,four reservoirs are mainly distributed in the work area northwest and southeast regions;North East and scattered.the attenuation property analysis,attenuation gradient changes to reflect changes in the gas layer,which can use the decay properties predicted reservoir hydrocarbon potential.Through the above studies have shown that seismic attributes not only can overcome the existing problems in the study area,provide the basis for more work area reservoir prediction.