| In this paper, we mainly study the subtle oil/gas reservoir prediction methods, take the Slope-Depression Zone in Liaohe Western depression as an example, verified the effectiveness of the combination methods of subtle oil/gas reservoir prediction technology.Learn the progress and difficulties of subtle oil/gas reservoir prediction through reviewing the domestic and foreign documents. Learn the geological background of the study area through reviewing the related documents of Slope-Depression Zone in Liaohe Western depression.Subtle oil/gas reservoir prediction has special requirements to the seismic data processing. We use seismic data targeted processing technology, static correction and multi-domain denoising techniques are applied to improve signal to noise ratio, a series deconvolution, well control and Q compensation Well Control and other technology to increase the relative resolution,'three high'seismic data have been accessed by three-dimensional seismic amplitude preservation processing and pre-stack depth migration processing technology. Then we take the 3D seismic data as the study object, to verify the effectiveness of the combination methods.The prediction of subtle oil/gas reservoir is a key aspect of 3D seismic data fine structural interpretation. We introduce the principle of sequence stratigraphy interpretation methods, and established stratigraphic framework, divided deposition sequence and sub-divided system tract take the seismic profile of the study area as an example, and the favorable subtle reservoir facies in study area have been indicated.Seismic attribute is the subject of subtle oil/gas reservoir prediction methods. We introduce the principle of BP neural network, self-organizing-map analysis, fluid activity, hydrocarbon detection, post-stack wave impedance inversion, and study the Es2, Es32 and favorable zone of Es4 of the well H631 use the 3D seismic data. Verify its effectiveness through testing by oil and logging data.
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