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Restoration of formation processes of dolomite reservoirs based on laser U-Pb dating: A case study of Ordovician Majiagou Formation, Ordos Basin, NW China
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ZHOU Jingao,YU Zhou,WU Dongxu,REN Junfeng,ZHANG Daofeng,WANG Shaoyi,YIN Chen,LIU Yuxin
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Table 1. Basic data of the samples
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| Sample No. | Well name | Formation | Well depth/m | Lithology | Pore type | Dolomite reservoir type | | 1 | Yu113 | Ma51 | 2674.98 | Powder crystal dolomite with
anhydrite concretions | Gypsum mold pore | Weathering-crust karstic | | 2 | Tong67 | Ma52 | 3802.70 | Powder crystal dolomite with
anhydrite concretions | Gypsum mold pore | Weathering-crust karstic | | 3 | Jin4 | Ma56 | 3688.27 | Thrombolite dolomite | Dissolved pore and cavity | Mound-shoal | | 4 | Tao112 | Ma58 | 3449.19 | Thrombolite dolomite | Dissolved pore and cavity | Mound-shoal | | 5 | Tao112 | Ma56 | 3321.29 | Dolarenite/dolorudite | Dissolved pore and cavity | Mound-shoal | | 6 | Tao112 | Ma56 | 3392.11 | Dolarenite | Dissolved pore and cavity | Mound-shoal | | 7 | Tao86 | Ma56 | 3679.73 | Oolitic dolomite | Dissolved pore and cavity | Mound-shoal | | 8 | Tao112 | Ma56 | 3316.77 | Powder crystal dolomite | Crack | Mound-shoal |
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