塔里木盆地三道桥地区潜山储层预测

Buried hill reservoir prediction in Sandaoqiao Area of Tarim Baisn

为预测塔里木盆地三道桥地区潜山储层有利发育区,在钻井取心岩性观察、薄片鉴定基础上,结合潜山地震相分析,明确了该区潜山岩性及储层特征——区内存在白云岩、浅变质岩及变质岩3种岩性的潜山,潜山储层以裂缝为主;运用地震振幅属性圈定了潜山岩性分布范围;利用高精度相干体属性对裂缝有利区进行了预测,预测结果在后期钻井中得到证实,获得了良好的油气勘探效果。

To predict the favorable development area of buried hill reservoirs in Sandaoqiao Area of Tarim Basin,the lithology of buried hill and reservoir characteristics are defined in this area based on lithology observation and thin section identification and combined with the seismic facies analysis of buried hill.There are three kinds of buried hill reservoirs,which area dolomite,shallow metamorphic rock and metamorphic rock reservoirs.Buried hill reservoirs are mainly composed of fractures.The distribution range of buried hills is delineated by the seismic amplitude attributes and the favorable areas are predicted using seismic coherence attributes.Prediction result is confirmed in late drilling and a good effect of exploration is obtained.