Research On High-resolution Processing And Apply Technology Of Explain To Seismic In Yue Hai Of Bohai Bay Basin

Finding the subtle trap hydrocarbon reservoir is a difficult subject in theoil-gas exploration for a long time. In this paper, aiming at problems existingin the exploration areas e.g. the oil and gas needs to be further explored, andthe development direction is not clear, using an example of oil-gas explorationproject at Yuehai international cooperation zone of Bohai Bay basin, startingfrom principle of treating high-resolution three-dimensional seismic data andusing fine seismic data of high fidelity treatment, based on the fully analyzedexploration results at the area and combined with comprehensive results of welllogging etc., according to the reservoir forming rule of lithological oil-gasreservoir, special technical method on seismic data is studied in the applicationsof fine explaining structure, partition and contrast of stratums, distributionrule of reservoir beds, identification and evaluation of geologic anomalousbodies and predicting oil-gas distribution zones. As a result, a good result isobtained and can provide a favorable technical support for predicting thereservoir beds and the oil-gas resources.New results in this research project are: (1) Treatment technique for waveletshaping is used for two different earthquake focus data of air gun and explosive.Meanwhile using treatment technique of wavelet shaping for two differentearthquake focuses of air gun and explosive, combined predicted deconvolutionprocess is re-designed, making section signal-to-noise temperate, train featureof waves clear, frequency develop accordingly, polygenous wave between stratumssuppress effectively. (2) Advisable semi-deep profile frequency is correctlyselected. It is suggested that the vertical resolution is not advisable to beover pursued during data treatment for exploration zones whose undergroundstructure is complex, reflective energy of semideep stratum is not strong,frequency and signal-to-noise is low, or the signal-to-noise and horizontalresolution may be affected. (3) Corresponding noise removal in this area iscreatively used. Not only the noise is suppressed, but also the effectiveinformation is protected. Especially, using protection of low-frequencyeffective signal ensures the imaging of semi-deep stratum. Although selectingnoise removal before lapping increases the complex degree of data treatment, theeffective information is effectively protected and the high fidelity of seismicdata treatment is realizedatthesametimeof removing wavenoiseinmulti-times.(4)Incomprehensive explanation for data,methods of variable speed drawing, inversion of earthquake property andearthquake and etc. are successfully used for providing a reliable basis of hiddenoil-gas reservoir exploration. Relatively high signal-to-noise of seismic datais an effective basis of using comprehensive exploration'methods to find thelithological oil-gas reservoir. If the adopted excursion, noise removal anddeep-zone frequency are used unsuitably, the data of temperate frequency, goodcontinuity and high signal-to-noise may easily make breakpoint fuzzy, contactrelation of horizons not clear, which may directly affect the application resultsof exploration technique methods for hidden oil-gas reservoir of seismic phasepartition, seismic property analysis, three-dimensional visualization, seismicinversion, etc.