Abstract: This paper briefly introduces the generals and features of all prev ious oil and gas resources assessment in China,and points out that compared with the international practice, there exist differences in oil and gas resources assessment in China such as assessment methodology, appraisement result, resource structure and resource time validity. In order to be more objective to evaluate domestic oil and gas resource potentials, it suggests to make full use of the opportunity of the new round of nation-wide oil and gas resource assessment, to rein-force the research of weak work in statistical method, geologic analogy method and the resource economy appraisement, enabling the domestic oil and gas resources assessment methodology to be more perfected by establishing such a set of assessment systems that not only accord with domestic oil and gas geologic features, but also joint with the international usual practices.

Key words: oil and gas, resource extent, resource assessment, technique sys tem