Abstract:

Four sets of pyrolith reservoir assemblages have been identified in Beipu area, western Nanpu sag,Huanghua depression.The main pyrolith types include flood basalt and eruptive pyroclastic rocks, and the reservoir spaces are composed of fissures and intergranular pores. Drilling and logging results indicate that there are abundant fissures and pores in tuff on top and bottom of thick basalt in the 2nd and 3rd members of Shahejie Fm., respectively, which will have relatively good exploration potential. Additionally, the sandstones above and below the pyrolith,being affected by magmatic activity, the poroperm characteristics would have been improved.It is,therefore, suggested that the explorer should pay much attention to the sandstones.

Key words: pyrolith, reservoir, fissure, pore, assemblage, Beipu