论文部分内容阅读
提出了两种新的生油岩测井评价方法，即基于砂泥岩导电机理，借助泥质砂岩导电方程：Ｗａｘｍａｎ－Ｓｍｉｔｈ方程计算含水泥岩电阻率Ｒ０值及生油岩的电阻率孔隙度Ｒ．然后用实测Ｒｔ减去Ｒ０值，其差值反映了生油岩的有机质丰度（即重叠法）；用三孔隙度测井计算的生油岩总孔隙度Ｔ，减去电阻率孔隙度Ｒ，其差值也反映了生油岩的有机质丰度（即双孔隙度法）．该方法的最大优点是在现场缺少生油岩实验室分析样品时可以快速评价生油岩的有机质丰度。
Two new evaluation methods for oil-well logging are proposed. Based on the conductive mechanism of sandstone and mudstone, the resistivity R0 of oil-bearing rock and the resistivity porosity R of oil-bearing rock are calculated by the Waxman-Smith equation. Then subtract the value of R0 from the measured Rt, and the difference reflects the organic abundance of the source rock (ie, the overlap method); the total porosity T of the source rock calculated by the three-porosity log subtracts the resistivity porosity R , The difference also reflects the abundance of organic matter of the source rock (ie, the two-porosity method). The biggest advantage of this method is the rapid evaluation of the abundance of organic matter in the source rocks when laboratory samples are lacking in the source rock.