The Relationship Between Oil-Gas Reservoir Formation And The Accommodation Space Changes of Songliao Basin, China

By

 Shiqi Zhang¹

(1) University of Petroleum, East China, Dongying, Shandong, China

 Using upper Jurassic-lower Cretaceous of Songliao basin as research target, the relationship between the accommodation space changes and oil-gas reservoir of the lacustrine basin were studied by the ways of comprehensive explanation of geochemical, drilling and core data. During the deposition of the first member of Qingshankou Formation and the first-second members of Nenjiang Formation, increasing tremendously of the accommodation space resulted in wide distribution of good source rock in which the amount of organic carbon was high and the type of organic matter is well. The communication space changes caused by tectonic and climatic period changes controlled the characteristics of source-reservoir-seal combination, and formed some types of combinations such as lower source - middle reservoir - upper seal combination et al.. The communication space changes controlled the evolution of sequence and the distribution of system tracts, and it is best for oil and gas accommodation that base fan and slope fan of lowstand system tracts.