Based on the data of the cast thin sections, the mercury injection, the well testing and the production test data, this paper systematically analyzes the alkaline diagenetic types and its influences on the low resistivity oil layer in Chang 6 Formation of southern Zhoujiawan. Results show that the three main types of alkaline diageneses in this area are the chlorite cementation, the calcite cementation and the rock salt crystal. Because of a strong compaction resistance of the chlorite film, a large section of conduction system is formed, and the water retention is caused by the adsorption of the chlorite film, the calcite cementation results in a bound water content rising, the rock salt crystal contributes to the formation of the calcite dissolution pore, therefore, the reservoir resistivity is decreased in the studied area. The research result provides some guidance for the analysis of the low resistivity reservoir formation, and a basis for the study of the low resistance reservoir distribution and development.

south Zhoujiawan  /  Chang 6 Formation  /  alkaline diagenetic  /  low resistance oil layer  /  bound water content