Controlling of hydrocarbons by Neotectonics and Tectonics fault activities.a case study of Bozhong area
Abstract：Neotectonism controlled and adjusted the accumulation and distribution hydrocarbon in Bozhong area. Combining the qualitative appraisement with semi-quantitative description method, this paper discusses the controlling action on hydrocarbon forming conditions and its accumulation effect in late-stage fault activity based on the analyses of the fault system charac- teristics and the fault activity rate （FAR） difference between 62 Ⅰ and Ⅱ faults. The results show that strong active faults （FAR〉25 m/Ma） have a transportation role, however, weak active faults （FAR〈10 m/Ma） mainly restrict hydrocarbon migration. Medium active faults （10 m/Ma〈FAR〈25 m/Ma） have hydrocarbon sealing and transportation dynamic equilibri- um role. Faults having transportation or sealing role along the strike show ＂segmentation＂ fea- ture, and the multi-layer enrichment pools form under the controlled ＂ segmented＂ active faults. The traps located at the dominant migration path of the gentle slope of the uplift are farfrom hydrocarbon kitchen. The paleocene strata of the medium-weak active fault and ＂active＂ source rocks at the end of uplift area, or regional combination of medium-strong active fault and ＂active＂ source rocks are the most interesting hydrocarbon exploration areas.
Keywords：fault activity ratesegmentedhydrocarbon accumulationNeotectonics TectonicsBozhong area
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 452-459 )