Abstract: Starting with single well log data analysis, the oil and water distribution as well as spatial distributing rule in Carboniferous reservoir are studied. From the view point of systematic combination, it is pro- posed that the Carboniferous reservoir consists of about 3 and 5 oil-water distributing systems, each of which is divided into impermeable caprock and oil-water combination system. The trap type of Carboniferous is considered to be a low-amplitude anticlinal structure overlying the upper part of Ordovician. According to these researches and corresponding sedimentary facies characteristics, A model of Carboniferous oil-water distributionis proposed in this paper.

Key words: Tahe oilfield, Carboniferous, reservoir, oil-water distribution