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The upper spontaneous potential produced by oil and gas accumulation is of a stable potential field, and its intensity is directly proportional to the content of the source and inversely proportional to the radius apart from the source. Theoretical research and practical results show that anomalies of spontaneous potential can indicate oil-bearing sandstone bodies and locate the areas of oil and gas accumulation. In oil areas which have fewer reservoir beds, the petroleum reservoir thickness can be predicted by determining the linear relationship between potential intensity and apparent equivalent thickness. In the Weixing （卫星） oilfield, which is devoid of sufficient reservoir beds, its apparent equivalent thickness can be predicted by the linear equation h= -0.19x＋0.74. On the basis of geological research, we use the spontaneous potential method to predict the equivalent thickness, helping in the selection of the most appropriate drill sites to enhance the probability of successful well boring so as to serve the next round development of the oilfield. 相似文献
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油气藏在地表产生的自然电位属于静位场, 其强度与场源量成正比, 与距离场源的半径成反比.理论研究与实践结果表明, 自然电位异常可以指示含油砂体, 圈定油气富集区.在储层套数较少的含油区可以用电位强度与视有效厚度的线性关系来预测油层厚度.卫星油田储层套数较少, 其视有效厚度可用线性方程h=-0.19x+0.74来表征, 为配合下一轮滚动开发工作, 在地质研究的基础上, 在地质研究难度较大的卫102、卫262、卫20地区应用自然电位预测有效厚度, 达到优选井位提高钻井成功率的目标. 相似文献
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内蒙古羊蹄子山-磨石山钛矿床是近几年国内所发现的新型钛矿床,其中,羊蹄子山矿带为热液改造型富钛矿床,磨石山矿带为沉积变质型富钛矿床。这2个矿带的主要有用矿物为锐钛矿、金红石及钛铁矿。根据大量物性测量和研究对比,发现富钛矿石具有较高的密度、弱磁性、高极化率、较低电阻率的物性特征。通过重、磁探测发现了多处有意义的异常,对部分异常进行了钻探验证,结果表明,高精度重力测量是有效的找矿方法,高精度磁法为基本的找矿方法。文章结合该区岩(矿)石的物性特征,探讨了大功率激电和频率域电磁法寻找此类矿床的有效性和可行性。并据此指出,重力与磁法面积测量相结合,在重点地段进行激电与电磁测深,是寻找同类矿床的有效的物探技术方法组合。 相似文献
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