Mineral characteristics and their geological significance of black shales in southeastern Ordos Basin by X-ray diffraction analysis |
| |
| Authors: | Zhigang Yao Yang Yang Huawei Ying Yunpeng Dong |
| |
| Institution: | 1. School of Earth Sciences and Engineering, Xi’an Petroleum University, Xi’an, 710065, China
|
| |
| Abstract: | X-ray diffraction analysis of black shale of Upper Triassic Member Chang 7 of the Yanchang Formation in southeastern Ordos Basin showed that black shales were deposited in brackish, strongly reducing, semi-deep-deep lacustrine facies, and mainly composed of quartz, feldspar, carbonate (dolomite), clay minerals (illite and illite/smectite) and a certain amount of pyrite. The mineral composition characteristics of this set of black shales are similar to those of highly productive shale gas in North America, for example shallow burial, low clay mineral and abundant brittle mineral, so the strata are conducive to the development of cracks and fractures. Thus, this area is favorable for shale oil/gas exploration and development. |
| |
| Keywords: | mineral composition shale gas/oil southeastern Ordos Basin |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ |
|
