Sedimentary Filling Models and Types of Fault-Bounded Margin inActic Region of the Northeastern Dongpu Depression
ZHANG Li-qiang~(1),JI You-liang~(2),WANG Sheng-lang~(3),JIANG Miao~(4)(1.College of Geo-Resources and Information,University of Petroleum, Dongying 257061,China;2.School of Ocean and Earth Science,Tongji University, Shanghai 200092, China; 3.China Petroleum and Chemical Corporation Zhongyuan Oil Field, Sinopec, (Puyang) 457001, China; 4.PetroChina Company Limited,Changqing Oil Field,CNPC, Xi’an 710021, China)
The marginal listric fault, slab-like fault and cocurrent fault-break zones are found in the analysis of the sedimentary facies in the northern slop zones of the Dongpu depression. The board margin consist of the listric fault with NE trend, the slablike fault with NNE trend and cocurrent fault-break zone, which have controlled the formation and evolution of the depression, and the deep sags or oil source centers were developed along the listric faults. The sequence stratigraphy in the down faults blocks of the marginal slab-like fault often consists of lowstand, transgressive and highstand systems tract by large volumes of sediments of alluvial fan, fan delta and subaqueous fan. The sand bodies in the down faults blocks of the marginal listric fault often mainly consists of subaqueous fan in transgressive systems tract. The distribution of lowstand delta were often controlled by the cocurrent fault-break marginal zones.