低电阻率油气储集层特征研究

A RESEARCH ON THE CHARACTERISTICS OF OIL AND GAS RESERVOIR WITH LOW RESISTIVITY

油气储集层是测井解释与评价中的主要研究对象。随着石油工业的发展 ,油气储集层的研究显得越来越重要 ,因为它不但决定油气储量的大小 ,而且直接控制油气井的产能及最终采收率。低电阻率油气储集层的特征不同于一般的砂泥岩储集层 ,由于它有着不同的地质特征 ,其中与测井信息密切相关的因素主要包括 :①储集层岩性特征 ;②储集层物性特征 ;③储集层电性特征 ;④储集层流体的性质及其分布特征等。它们是进行低电阻率油气储集层测井精细解释与评价的地质基础 ,这些地质因素对各种测井响应的影响程度 。

Oil and gas reservoir is the major research target in log interpretation and evaluation. Along with the development in petroleum industry, the research on oil and gas reservoir becomes more and more important, because it not only decides the scale of oil and gas reserves but also directly controls the productivity and ultimate recovery factor of oil and gas well. The characteristics of oil and gas reservoir with low resistivity are different from those of conventional sandstone and mudstone reservoir owing to the fact that it is of different geological characteristics, in which the factors closely related to log response are: (1) lithological property of reservoir; (2) its petrophysical property; (3) its electric property; and (4) its fluid property and its distribution, etc. They are the geological bases of a fine log interpretation and evaluation of oil and gas reservoir with low resistivity and the degree of the influence of these geological factors on various log responses is the petrophysical base of evaluating reservior by logging data.