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| Petroleum migration pathway system of Tazhong area in Tarim Basin |
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ZHAO Yong-sheng1,2,3,Lui Ke-qi4
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(1. Guangzhou Institute of Geochemistry in Chinese Academy of Scieaces, Guangzhou 510640，China;2. Faculty of Ceo-Resource and Information in China Unwersity of Petroleum, Dongying 257061，Shandong Province, China;3. Graduate School of Chinese Academy of Sciences, Beijing 1000491 China;4.Ebngxin Oil Production Plant, ShengU Oi^ield Companyy Dongying 257094, Shandong Provincet China)
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| Abstract: |
| Petroleum migration pathway system，which is the link between source rock and trap，is the key factor of petroleum accumulation system. The migration pathway network in Tazhong area is composed of faults, unconfonnities, fractures, and pores. The four fault systems were studied by fractal method. The results dhow that the fault system i& self-similar within a certain scale range. The fractal dimension of Tg7, TgS1, Tg5 and. Tg2ff is 1.24, 1.39, 1.09 and 1.05 respectively. There are two different fields of fluid flow above and under the unconformities in tetrms of the characteristics of fluid flow in Tazhong area. The migration pathway under the unconformity ie mainly composed of pores, cave? andi fractures where the flow regularities are complicated. While the migration pathway above the unconfonrtity mainly conaiats of pores where the ￡luid flow can be characterized by Darcy' s law. There are limited lateral migration networit and unlimited vertical migration network in Tazhong area. |
| Key words: Tarim Basin Tazhong area fault unconformity pathway system |
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