The research on igneous oil reservoirs is a new field in petroleum exploration all over the world. The complexity of anisotropism and difficulty of exploration of this kind of reservoirs far exceeds other types of oil reservoirs. By analyzing Shang-741 igneous oil reservoir in Linyi sub-sag , this paper makes a thorough study of lithofacies and reservoirs of igneous rocks and puts forward the study method for lithofaces models and anisotropism reservoirs of igneous rocks. In combination of the characteristics of Linyi subsag, the authors propose a series of appraisal principles for igneous oil reservoirs at the initial stage of oil exploration to guide the exploration of igneous oil reservoirs similar to Shang-741 oil reservoir.