中文摘要：

储层裂缝及砂体的空间展布方位对油气勘探和开发具有重要意义，岩心是研究储层的唯一实体，虽有多种岩心原始方位恢复的手段，但是缺乏简便易行的方法。本文用古地磁方法对井下钻井岩心进行复位，进而研究岩心裂缝及砂体的展布方向，以延长油田X区块6口井46块样品为例，得出了这6口井的裂缝及砂体空间展布方位，并对该方法的可靠性进行了分析，完善了该方法的理论与技术体系。研究结果表明，利用古地磁方法进行岩心复位具有成本低、易操作且精度高的特点。

英文摘要：

The spatial distribution of reservoir fractures and sand bodies are of great significance for oil and gas exploration and exploitation, The only entity to study reservoir is core which should be original orientated , although there are a variety of means to obtain the original orientation of the core, but the lack of effective one. In this paper paleomagnetic method was used to study spatial distribution of reservoir fractures and sand bodies which based on restored the original orientation of the core. The theory and technology system of the method was improved by obtaining the original orientation of reservoir fractures and paleocurrent of 46 samples from 6 wells in Yan-Chang Oilfield X-block, and the reliability of the data was analyzed and successfully tested by directly observation in the field. The research result shows that the method which used paleomagnetism method to restore the original orientation of the core have merits of easy operation, lower-cost and high accuracy. Meanwhile the study also has provided basis for adjusting the wells location and designing plan of reservoir exploitation of X-block.