| Author's Name: Zhang Peng, Hou Guiting, Pan Wenqing, Qi Yingmin, Zhang Qinglian, Meng Qingfeng |
| Institution: School of Earth and Space Sciences, Peking University |
| Abstract: |
| The method of weighting areal density of effective fractures can be used to reveal the development characteristics of effective fractures in whole target strata. Based on the observation of the dolostone cores from 28 wells in Yaka, Yengimahalla, Tazhong and Tadong areas in Tarim Basin, statistics and analysis have been done respectively to the dolostone structural fractures in the Upper, Middle and Lower Cambrian strata. It is indicated that as for the development of structural fractures, the average weighting areal density of fractures in the inner buried-hill fracture zones (in Tazhong and Tadong areas) is larger than that in the buried-hill zone (in Yaka and Yengimahalla areas) . As for the development of effective fractures, the average weighting areal density of fractures is large in Upper Cambrian strata in both Tazhong area and Yaka area, which emerges preferable reformation of these fractures to dolostone reservoirs. The effective fractures are relatively developing only in Middle Cambrian strata in Yengimahalla area while are not in Upper, Middle and Lower Cambrian strata in Tadong area. It is concluded that the difference in areal density of effective fractures is closely related with local tectonic activities, fluid activities and fracture fillings in the buried-hill zone and the inner buried-hill zone. |
| Keywords: Cambrian; Dolostone; Structure fracture; Fracture characteristics; Effective fracture; Fracture density; Tarim Basin |
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投稿时间：
2013-04-01 |
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