| 摘要: |
| 根据海平面升降而对海洋碳酸盐岩沉积划分的不同沉积体系域,和其准同生成岩作用之间存在着相关性,这种相关性可以通过不同体系域所发育的成岩作用类型体现出来。文章以塔里木盆地轮南古隆起下中奥陶统碳酸盐岩为例,把准同生成岩作用放在层序地层学格架范畴内来研究,总结了不同体系域内发育的成岩作用类型和特征,认为海侵体系域主要发育方解石胶结作用和白云石化作用,高位体系域主要发育有方解石胶结作用和大气淡水溶蚀作用等。在层序地层格架下进行成岩作用对比的结果表明,高位期以及海侵期下伏的前期高位期沉积,是有利的成岩作用改造层位,并在物性统计数据中得到了证明,为有利储集体的评价、预测提供了新的途径。 |
| 关键词: 轮南古隆起 下中奥陶统 碳酸盐岩 成岩作用 塔里木盆地 |
| DOI： |
| 附件 |
| 投稿时间：2007-04-17 |
| 基金项目: |
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| Penecontemporaneous diagenesis of the carbonate rocks in a sequence stratigraphic framework:An example from the Lower and Middle Ordovician carbonate rocks in the Lunnan palaeouplift, Xinjian |
| LIN Xiao-bing, WANG Zhen-yu, TIAN Jing-chun, TAN Xiu-cheng |
(1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, Sichuan, China;
2. College of Resources and Environments, Southwest Petroleum University, Chengdu 610500, China) |
| Abstract: |
| There is a correlation between the depositional systems tracts based on the eustatic fluctuations and penecontemporaneous diagenesis in the marine carbonate rocks. This correlation, in turn, can be incarnated by the diagenesis developed in the systems tracts.Exemplified by the Middle and Lower Ordovician carbonate rocks in the Lunnan palaeouplift, Tarim Basin, Xinjiang, the types and characteristics of the diagenesis developed in individual systems tracts are summarized in a sequence stratigraphic framework. The calcite cementation and dolomitization mainly occur in the transgressive systems tract (TST), and calcite cementation and meteoric dissolution dominantly appear in the highstand systems tract (HST). The comparative study of the diagenesis in a sequence stratigraphic framework shows that the HST deposits and their underlying deposits are believed to be the favourable intervals reworked by diagenesis and potential reservoirs, as proved by statistic physical data for the strata in the study area. |
| Key words: Lunnan palaeouplift Middle and Lower Ordovician carbonate rock diagenesis Tarim Basin |
