Geological Modeling Based On Seismic Data And Its Effect Evaluation

Nowadays the offshore zone in Dagang oil field is a hot spot of petroleum exploration and development in our country, because of the particularity of geographical position,it is different from the petroleum exploration and development of land oil field, has the characteristic of"high investment, high risk, high tech"and"mainly-based on the horizontal well and high angle deviated well, high demand of the reservoir research accuracy". Therefore, to build up the higher accurate 3D geology model in the petroleum exploration and development process, based on this and the reservoir which portrays to the model in carries on accurate, the fine reservoir recognition and the evaluation, regarding reduces the development risk, to raise the economic efficiency to have the important meaning. But lacks in the drilling data, by the seismic data primarily in reservoir evaluation stage, how to use the seismic data fully, synthesizes geological, the oil well logging and the seismic data establishment high precision geological modeling effectively, and carries on the analysis evaluation to the model effect is this research key point and the difficulty.This article uses the 3D geology modeling technology, to Zhangdong zone development geological modeling research, and then uses many kinds of assessment methods, carries on the evaluation to the model effect. First optimal leaves with the seismic attribution parameter is closest, the relevance is best, and can reflect the lithofacies characteristic mostly as the shale content parameter takes the model work the first object, then optimization model method establishes the lithofacies model, then use the"facies controls the model"principle establishment the petrophysics model. Based on this, take the effect evaluation research: Firstly, portrayed the sand body to the model in the size, thickness, to extend the direction and the shape has made the quantitative evaluation.Secondly, using the well drilling evaluation's method accuracies the sand body's spatial shape and porosity permeability oil saturation and so on attribute parameter which forecast in the model, to carry on the evaluation.Thirdly, carries on vacuate well check-out to the model, investigates the model to be whether reasonable, be stable.The research indicated that using the based on seismic data geological modeling technology can mix together the spatial structure and the well drilling description geological feature, in the plane can further portray the reservoir vertical characteristic on vertical, causes it tends the well logging yardstick, causes the simulative result, in maintains with the inversion result under the data distribution uniform premise obtains the higher resolution reservoir spatial distribution to describe, the model effect is good, meets the need of the period of reservoir evaluation in Offshore Zone.