A Method Judging the Existence or not of Transporting OilGas  Ability of Fault in the Stillstand Period

Key words: 
• fault /
• stillstand period /
• transporting ability /
• kataclasite /
• grain size /
• mudstone content /
• tip angle

Abstract: By the study of characteristics of internal structure and transporting pathways in fault, The main transporting pathways of fault in the stillstand period were considered to be the connected pores of kataclasite. The existence or not of their transporting oilgas ability was decided by the big or small of grain size of kataclasite, mudstone content of kataclasite and tip angle of fault. Based on it, the relation between oilgas migration velocity through kataclasite of fault under the action of buoyancy and grain size of kataclasite, mudstone content of kataclasite and tip angle of fault were studied by the physical simulation experiment. By the relation a method judging the existence or not of transporting oilgas ability of fault was established. If the oilgas migration velocity is more than zero, fault has transporting oilgas ability, on the contrary , fault don't have transporting oilgas ability . The method was applied in judging the existence or not of transporting oilgas ability of Surennuoer fault in different state of Hailaer Basin. The results accord with actual geological conditions. It indicates that the method is practical to judge quantitatively the existence or not of transporting oilgas ability of fault. 