| Author's Name: Zhu Dongya, Zhang Dianwei, Li Shuangjian, Feng Jufang, Sun Dongsheng, Lin Juanhua, Zhang Rongqiang |
| Institution: SINOPEC Petroleum Exploration and Production Research Institute |
| Abstract: |
| The Lower Assemblage refers to the whole thick pre-Mesozoic formations from Sinian system to Paleozoic Carboniferous system in Sichuan Basin. Three types of karst reservoirs develop in Sinian-Ordovician Carbonate rock in the Low Assemblage, which are tectonic unconformity karst, penecontemporaneous hiatus karst and contemporaneous karst reservoirs. Having been affected by long-term regional tectonic uplifts and frequent sea level eustasies, several regional tectonic unconformities, including C-1/Z2dy, O1/C-2-3, S1l/O2b and P1/Z unconformities, and sequence boundaries formed and several contemporaneous shoal facies karst reservoirs developed under these unconformities. Superimposition and repeated reformation of multi-genetic karstification from early to late is the reason why carbonate karst reservoirs widely develop in horizontal and vertical extents in the Lower Assemblage. |
| Keywords: Sinian; Paleozoic; Karstification; Carbonate reservoir; Reservoir characteristics; Sedimentation characteristics; Sichuan Basin |
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投稿时间：
2014-02-11 |
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