成像测井在演武地区北部延安组油藏勘探中的应用

目的分析鄂尔多斯盆地西南部演武地区延安组储层声电成像测井特征,查明该地区延安组油藏分布特征。方法在研究区砂岩层理的电成像测井特征基础之上,对该区砂体展布进行预测;利用电成像资料的泥岩倾角及倾向数据,对该区构造进行分析;利用声电成像测井反映出的裂缝及井眼垮塌方位数据分析研究区的地应力特征。结果研究区延安组砂岩交错层理普遍发育,同一个井区,延安组砂体从底部到顶部古水流方向较为稳定;研究区最大水平主应力方向在区域上有差异。结论演武地区北部延安组有工业油流的井区应同时具备储层发育和位于构造高点附近两个条件,最有利的油气聚集区块应在演15井区附近沿北东东—南西西方向一带。

Application of the acoustical and electrical imaging well logging in Yanan Formation reservoir exploration in Northern Yanwu Area

Aim To analyze the characteristics of acoustic-electric imaging well logging in the Yanan Formation in Ordos Basin;to find out the distribution of the oil reservoir in Yanan Formation.Methods The study predicts the distribution of the sand body on the base of the electrical imaging characteristics of sand rock.The tectonic in this area was analyzed by the data of the inclination and tendency of mud rock.By the data analysis of acoustical and electrical imaging logging cracks and collapsed borehole,the stress characteristics of the study area was discussed.Results The cross bed is found out in many sand rock,and the direction of the paleocurrent is steady from the bottom of Yanan Formation′s sand rock to the top of Yanan Formation′s sand rock,the max stress in horizon has difference in different area.Conclusion Both the reservoir and the location in the high spot of tectonic are necessary for the industrial oil in reservoir of Yanan Formation in Yanwu area.The most favorable zone of oil accumulation lies in the direction of east of northeast to west of southwest,near Yan 15 well.