Seismic Geological Interpretation Of The Ordovician Yingshan Formation In Tazhong Ⅱ Region

Currently, the seismic method is still one of the most effective means for the exploration of carbonate reservoirs, Due to internal hierarchical of carbonate is fuzzy and often lack traceable phase axis, so that greatly increased the difficulty of seismic exploration. Therefore, by studying the seismic reflection characteristics of the wave field phase axis change characteristics and reservoir space from different seismic reflection, scattering, and thus to understand and describe the morphology and spatial distribution of underground seam cave system will have great significance.On the basis of the geological background research, Combined with the seismic reflection strength and shapes, this article divides seismic reflection into four types, including the string beads reflection, the flaky reflection, the disorderly reflection and the weak reflection. And the string beads reflection and the flaky reflection are subdivided. Based on the summary of the corresponding relations between seismic profile and reservoir in Yingshan Formation of the Lower Ordovician in Ⅱ Tazhong area, the corresponding geological characteristics of the every kind of seismic reflection types have been carefully analyzed. On this basis, establish geological interpretation from different types of seismic reflection and summed up the beaded reflector corresponds best reservoir development flaky reflection reservoir development situation second only to beaded reflection. The messy reflection and weak reflection of poor reservoir development, weak reflection reservoir which almost no development.Through systematic research on the different types of seismic reflection, establishing a single well-dimensional geological model to study single-well and reservoir development wells week situation, and on this basis, combined with regional tectonic fracture, karst topography and other factors ancient set up kilometer stage dimensional geological model to study the distribution of reservoir development in a certain direction, and reservoir characteristics research part of the region by creating a three-dimensional static geological model.Research work on the tower before the final combination Yingshan Formation of the Lower Ordovician in Ⅱ Tazhong area make predictions, making research beads reflection, the flaky reflection, the disorderly reflection and the weak reflection, reflected the formation mechanism and geological connotation with special significance.