Starting from the understanding of low resistively oil reservoirs and combining with the knowledge of geology and log response characteristics, the researchers have found the identification method of low resistively oil reservoirs in oil-gas field.

In this paper,two methods of deep laterolog-porosity log and tested resitivity-apparent gas/water layer resistivity are proposed to deal with this identification on the basis of an analysis on log response characteristics,which has been applied to old wells to obtain a better result.

Origins and log responses of Neogene of low-resistivity oil pays in Bohai sea;

Based on clay mineral analysis、grain size analysis、thin section identification and conventional core analysis data,in combination with the analysis of log response characteristics in the paper, it shows that high irreducible water saturation in fine sand and high illite content in shaly sand are the two main causes of low resistivity and low formation res.