储层“四性”关系研究是指储层的岩性、物性、含油性及测井响应之间的内在联系,是岩石物理研究的基础。烟雾茆油区主要含油层位为延长组长4+5、长6及长7油层组,长4+5、长6油层组储层岩性、电性等特征较为相近,但与长7油层组储层较为明显的差异,本文对烟雾茆油区延长组长4+5、长6及长7油层组储层“四性”关系进行了详细的研究。 Reservoir “quatity ” relationship research refers to the intrinsic relationship between reservoir lithology, physical properties, oiliness and well logging response, which is the basis of petrophysical research. The main oil-bearing reservoirs in the Fuji Oil Region are similar to the 4 + 5, 4, 5, 6, and 7 reservoirs of Chang 6, Chang 4 + 5 and Chang 6 reservoirs, but are similar to Chang 7 reservoir This paper studies the relationship between reservoirs of “4 + 5”, “Chang 6” and “Chang 4” in Yanchang Formation in Yanwu Oil Region of Shaanxi Province.