Abstract:

Abstract: The assessment method of shale gas resources can differ completely from that of conventional hydrocarbon. Combined the present exploration and development situation of shale gas in China with the demands of “The national survey and evaluation of shale gas resource and favorable area selection”, a new method and technique for shale gas assessment is proposed, namely the probability volume method, based on the shale gas accumulation mechanism and characteristics. According to the shale gas geological recoverable conditions and statistical analysis, the parameters system for determining shale gas prospect areas, favorable areas and target areas is established. Furthermore, criteria for shale gas targets selection of different types and work flow for shale gas resources evaluation are put forward. Combining domestic and USA shale gas statistics data, this study laid the foundation of evaluation conditions for systematically assessment of the shale gas resources in China. Resource assessment parameters can be classified as discrete and continuous ones, which can be obtained and possibility assigned according to their distribution characteristics. Probability volume method and technique are applied in the Chinas first systematical shale gas resource assessment and work well.

Key words:  shale gas, resource assessment method and technique, conditional probability principle, favorable areas selection