岩性油藏地震描述技术在准噶尔盆地春光油田的应用

准噶尔盆地春光油田新近系沙湾组岩性油藏埋藏浅、厚度薄、成岩作用差,勘探效果不理想。利用层拉平切片技术确定有利储集相带、分频技术雕刻砂体、"类亮点"特征检测流体、进一步采用拟声波+电阻率反演两步法鉴别流体,这一技术方法系列在春光油田的实际应用效果良好。用拟声波+电阻率反演两步法可以检测出无亮点特征的含油砂体或含水砂体。对于不具备"类亮点"特征的滩坝砂油藏的勘探,可由原来的应用"类亮点"特征直接找油转为寻找有效圈闭,并在此基础上应用合适的流体检测技术,这同样可以发现有利的滩坝砂油藏。

Application of Seismic Description Technique for Lithologic Reservoir in Chunguang Oil Field, Junggar Basin

The Neogene Shawan lithologic oil reservoir in Chunguang Oil Field is characterized by shallow burial,thin thickness and poor digenesis,which results in an unsatisfied effect of exploration. A series of good applica-tion results have been achieved in this field,which including the flattening slice technique that determines favorable reservoir belts,the frequency division technique that graves,the "bright-like spot" feature that discriminates sand bodies and the 2-step inversion method of pseudo-acoustic wave adding electrical resistivity that identifies fluids. The 2-step inversion method can detect out oil-bearing or water-bearing sand bodies without bright spots. For the exploration of favorable beach reservoirs without bright-like spots,effective traps can be found with suitable fluid detection technology in spite of the customary method of applying "bright-like spot" feature.