Study of Tectonic Background and Reservoir-forming Condition of Volcanic Rock in Songliao Basin
Volcanic rock of Songliao Basin,which is divided into Huoshiling formation and Yingcheng formation,is the part of Xinganling Group.The difference of types of rocks,chemical constitution and distribution characteristics is the result of episodic tectonic evolution in depressed stage.Volcanic reservoir is mainly controlled by rock facies.Plentiful oil-gas supply,reservoirs and cap rocks well-developed and various kinds of traps well-corresponded are the foundations of reservoir formation.