松辽盆地升平—宋站地区储层物性的地震描述方法

油气储层是石油勘探开发的直接目的层。孔隙度和渗透率是反映储层性能优劣和评价油气田的重要参数。长期以来是通过钻井取心、测井等方法得到的,其不足是只代表井点附近局部储层物性。事实上,钻井毕竟是很少的,尤其在早期勘探阶段。而地震资料却能够由点到面预测储层物性。本文以“威里(Wyllic)公式”为基础,首先在井点处建立声波速度与孔隙度、孔隙度与渗透率的统计关系。然后,将这种关系由井点延拓到SEISLOG剖面上,从而可以获得孔隙度与渗透率的平面分布。本区的预测结果表明,这种方法能够为早期的储层评价、地质储量预测以及早期的油气田开发方案的设计提供重要的参数。

SONGLTAO BASIN SHENGPING-SONGZHAN AREA RESERVOIR PHYSICAL PROPERTIES SEISMO-DESCRIPTION METHOD

Hydrocarbon reservoirs are the direct objective beds of petroleum exploration and developememt. Porosity and permeability are important parameters representing whether the properly of a reservoir is good or bad and for oil/gas field appaisal .For a long lime, they were obtained through the cores drilled, logging or other methods .Their common demerit is that they can only rcrresent the physical properties of a partial reservoir dose to the well. In fart, the number of wells drilled after all is very small, especially in the early stage of exploration. However the seismic data can predict its physical properties from point to area. On the basis of the wyllie equation, this paper establishes firstly the statistic-relations between acoustic speed and porosity, porosity and permeability at well points.Then prolong and develop these relations from well points on to the SEISL.OG secfions, thus obtains the plane dislribution of porosity and permeability. The anticipated results for this area show that this method can provide important parameters for early reservoir appraisal, predicting geological reserves and designing the early development plan for oil/gas fields.