Abstract: Several NE-SW strike?slip fault zones are distributed in the Ordovician strata in northern slope in Tazhong uplift of Tarim basin,along which a lot of oil and gas seepages were discovered in carbonate rocks of the Ordovician from many drilled wells. Study on the inside carbonate reservoir feature and origin, as well as the relationship with the strike?slip fault zones is one of key issues for petroluem exploration in it. This paper presents comprehensive analysis of the development features, lithologic and geochemical data from 4 typical wells (i.e.A, B, C, and D wells) drilled in the Ordovician reservoir. And combined with the regional geologic setting and igneous rock characterisitcs,it considers that such a reservoir development may be related to plutonic karst fluid transformation with different properties, among which Well A may be related with the regional igneous intrusions?relevant fluid, while Wells B, C, D could be related to the deep hydrothermal fluids in silicon formations. Based on these, the segmentation and deformation intensity of 3 strike?slip fault zones are analyzed semi?quantitatively. Compared with the actual drilling situations, it is concluded that the segmentation of strike?slip fault zones may control the position of the reservoirs, where transtension part is better than pressure torsion part; whereas transformation intensity may control the scale of it,and the greater the intensity, the bigger the scale is. Finally, this paper develops the model for such fault zones and plutonic karst reservoirs in this area, so as to provide a new idea for petroleum exploration and evaluation of this inside carbonate reservoir