岩性油藏地震描述技术在准噶尔盆地春光油田的应用

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

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。

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 application 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.