ANALYSIS ON CHARACTERISTICS OF MULTI-FACTOR CONTROLLING SAND-BODIES’ FORMATION AND DISTRIBUTION IN THE ERLIAN BASIN
Liu Zhen1, Hao Qi1, Zhao Xianzheng2, Zhang Yiming2, Yang Dexiang2
1. Key Laboratory for Hydrocarbon Accumulation Mechanism, Ministry of Education, China University of Petroleum, Beijing 102249; 2. Huabei Oilfield Branch Company, China National Petroleum Corp., Renqiu, Hebei 062552
In the Erlian Basin, the main controlling factors on formation and distribution of sand-bodies included structural zone types, syndepositional faulting, systems’ tract, slope-break belt types, and sedimentary facies types. The different types of sand-bodies developed not only in the varied structural zones, but also in the different structures of the same structural zone. The occurrence of fault surface and combination of boundary faults in the steep or gentle slope zones controlled the injecting directions of detrital sediment source. The sand-bodies of the different sedimentary systems formed in the different systems’ tracts, respectively. The different sedimentary facies and morphological features of sand-bodies existed in different slope-break belts, and the different types of sedimentary facies affected the characteristics of sand-bodies. To sum up, this paper put forward a concept of "multi-factor controlling sand-bodies", and based on some examples from the Uliastai Sag, Jargalangt Sag, Bayan Dulan Sag, Anan-Abei Sag and Saihan Tal Sag of the Erlian Basin, the formation and distribution of sand-bodies controlled by these factors were discussed detaily. Furthermore, the paper thought that the concept of "multi-factor controlling sand-bodies" could reveal the complexity of formation and distribution of lithologic traps in the Erlian Basin.
Liu Zhen,Hao Qi,Zhao Xianzheng et al. ANALYSIS ON CHARACTERISTICS OF MULTI-FACTOR CONTROLLING SAND-BODIES’ FORMATION AND DISTRIBUTION IN THE ERLIAN BASIN[J]. Chinese Journal of Geology, 2007, (2): 319-334.