A Study On Putaohua Reservoir River Channel Forecast Technology Of Changling Seg Qianbei Region

Using seismic data of targeted to processing in the north of Qian’an tointerpretate T1、T2and Putaohua oil layer fine structure; On the basis ofthe horizon of fine interpretation, using seismic attribute analysistechnology for the qualitative prediction of Putaohua oil layer;Completed the post-stack inversion, characteristic parameters inversion;Using LandMark, Epos software to carry out prestack AVO attributeanalysis; Fusion technology was applied to the north of Qian’an areaPutaohua reservoir sand body reservoir distribution for the integratedprediction, summarizes north of Qian’an reservoir prediction technology,predicted the distribution of sand body plane in two Wells.Adopts the integration work mode to process and interpretate.strengthenthe organic combination of seismic geology, we have a lot of in-depthstudy Putaohua reservoir characteristics, according to practical problemsof the thin sand reservoir mud wave impedance difference small, such assupporting conventional applicable treatment technology on the basis of the integrated application of prestack domain denoising and frequencyamplitude compensation, deconvolution combination and prestackgathers new technologies, such as processing, provides the imageprocessing results.We points to distinguish with forecast in thin reservoir and lateralchanges of seismic data and other technical difficulties: the western areausing the structure information of seismic in the complex waveamplitude reveal reservoir distribution; Central use hour window withfrequency scanning techniques to reveal the distribution trend of thinreservoir; Eastern ues along the layer section to reveals the channelcharacteristics of the amplitude. For mudstone containing calcium,calcium cementation sandstone, mudstone and sandstone difficulties ofthe small difference of wave impedance, the wave impedance inversionusing the frequency division, gamma, resistivity inversion bodythickness of multi-attribute comprehensive constraints are extracted,reduces the uncertainty of a single impedance inversion, improves thesandstone quantitative prediction accuracy. Combining the result ofAVO attribute analysis to use weighted constraint, gain sandstonethickness figure that the well coincidence rate reaches83%.