The Prototype Character of Jiaolai Basin in Cretaceous Laiyang Period

Key words: 
• Jiaolai Basin /
• Log data /
• prototype basin /
• Laiyang Formation

Abstract: Laiyang Formation of Jiaolai Basin is the target stratum for oil and gas exploration. By measuring several field sections, log datum, seismic datum paleocurrent direction,the paper indicated that different structural locations have different sedimentary facies. The Authors constructed sedimentary framework of Laiyang formation. Further more found two subside and deposition center, one is called ZhuwuJimo sag, along NNE direction, controlled by MupingJimo fault belt, another is called JuxianZhucheng sag, also NNE direction, along Shuriver rift and Zhucheng depression. Two sags is a relatively independent sedimentary unit in Laiyang period. The two sags dominated sedimentary formwork in Laiyang Formation period, Shuinan member was apex of lake development, mainly was lacustrine facieses. While Qugezhuang member, mainly was alluvial deposition. North border fault activity of Sulu Oregon belt controlled the Laiyang Formation deposition.