Comparative study about the characteristics of inclusions in the paleokarst fillings in the northern outcrop and underground areas of Tarim Basin
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摘要: 塔里木盆地奥陶系储层经历多期水-岩作用改造，其分布发育规律异常复杂，古岩溶充填物中包裹体特征对古岩溶作用环境和期次具有较好的指示性。本文通过对塔里木盆地北部露头区和井下古岩溶充填物中包裹体进行测试，系统总结了两个地区包裹体的物理、化学特征，从一个新的角度开展露头区和井下岩溶发育规律对比研究。结果表明，研究区以单液相、气液相的盐水包裹体为主，仅塔河主体区井下样品中含有少量烃质包裹体；包裹体的物理特征反映了埋藏期岩溶作用的环境特征；按盐度与均一温度的交互关系划分出5种包裹体类型；根据古地温梯度计算出包裹体形成于浅埋藏、中埋藏、深埋藏3种环境；奥陶系碳酸盐岩经历了风化壳期岩溶、浅埋藏期岩溶、中埋藏期岩溶（早、晚）、深埋藏期岩溶等4期岩溶作用，岩溶储层的充填主要发育在中埋藏期。Abstract: The Ordovician oil/gas reservoir in Tarim Basin had experienced multiple stages of water-rock interactions, so the distribution and development of the karstic reservoir are very complex. However, the characteristics of inclusions in the paleo-karst fillings can effectively indicate the changes in environments and periods of water-rock actions of the paleokarst. Based on the test of the inclusions in paleokarst fillings sampled from both outcrop area and the underground, the physical and chemical characteristics of the inclusions are summarized. From a new perspective, this paper will carry out a comparative study of the karst development over the outcrop area and the underground, repectively.. The results show that in terms of type of the karstic filling inclusions, the study area is predominated by single liquid phase and gas-liquid phase aqueous inclusions, with only a small quantity of hydrocarbon inclusions occur at the underground in Tahe Oilfield. The physical characteristics of the inclusions reflect the particular environments of the buried paleo-karst. The inclusions can be divided into five combined types according to the interaction between salinity and uniform temperature. Based on the ancient geothermal gradient, the inclusions formed in three kinds of environment (i.e., shallowly buried, medium buried, deep buried). The Ordovician carbonate rock has experienced four periods of karstification, including weathering crust karst, shallowly buried, moderately buried (the early and late) and deeply buried karsts; and the filling of karst reservoir was mainly developed in the medium burial period.
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Key words:
- fillings /
- inclusion /
- paleokarst /
- outcrop area /
- Tahe Oilfield
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[1] 夏日元,唐建生.矿物包裹体特征对古岩溶作用的指示性［J］.地球学报,2004,25(3):373-377. [2] 李振宏,郑聪斌.古岩溶演化过程及对油气储集空间的影响：以鄂尔多斯盆地奥陶系为例［J］.天然气地球科学, 2004,15(3):247-252. [3] 杨明慧,王嗣敏,陈善勇,等.渤海湾盆地黄骅坳陷奥陶系碳酸盐岩潜山成因分类与分布［J］.石油与天然气地质,2005, 26(3):310-316. [4] 李会军,丁勇,周新桂,等.塔河油田奥陶系海西早期、加里东中期岩溶对比研究［J］.地质论评,2010,56(3):413-425. [5] 夏日元,唐建生,邹胜章,等.碳酸盐岩油气田古岩溶研究及其在油气勘探开发中的应用［J］.地球学报,2006,27(5):503-509. [6] 刘存革,李国蓉,朱传玲,等.塔河油田中下奥陶统岩溶缝洞方解石碳、氧、锶同位素地球化学特征［J］.地球科学:中国地质大学学报,2008,33(3):377-386. [7] 淡永,梁彬,曹建文,等.基于缝洞方解石包裹体测试分析塔北轮南地区奥陶系古岩溶期次及环境［J］.新疆地质, 2015,33(1):95-100. [8] 曹建文,梁彬,张庆玉,等.湘鄂西地区寒武系娄山关组古岩溶储层及其发育控制因素［J］.中国岩溶, 2013,32(3):330-338. [9] 张聪,于炳松,樊太亮,等.塔里木盆地北部下奥陶统碳酸盐岩孔洞充填物特征及其成岩环境分析［J］.地学前缘, 2008,15(2):100-108. [10] 张臣,郑多明,李江海.柯坪断隆古生代的构造属性及其演化特征［J］.石油与天然气地质, 2001,22(4):314-318. [11] 曲国胜,李亦纲,陈杰,等.柯坪塔格推覆构造几何学、运动学及其构造演化［J］.地学前缘, 2003,10(Z1):142-152. [12] 钟建华,毛毳,李勇,等.塔北硫磺沟奥陶系含油古溶洞的发现及意义［J］.中国科学:地球科学, 2012,42(11):1660-1680. [13] 李宝刚,贾承造,李启明,等.塔里木盆地西克尔地区古溶洞特征及主控因素［J］.新疆石油地质, 2013,34(3):247-250. [14] 石书缘,胡素云,刘伟,等.塔里木盆地西克尔地区奥陶系溶洞系统特征及控制因素［J］. 天然气地球科学, 2014,25(2):167-177. [15] 刘伟,罗平,顾家峪,周刚.塔里木盆地西克尔地区古岩溶储层露头表征［J］.地质学报, 2010,84(8):1215-1222. [16] 林忠民.塔里木盆地塔河油田奥陶系大型油气藏形成条件［J］.地质论评, 2002,48(4):372-376. [17] 刘德汉,肖贤明,田辉,等.含油气盆地中流体包裹体类型及其地质意义［J］.石油与天然气地质, 2008,29(4):491-501. [18] Munz I A. Petroleum inclusions in sedimentary basins: systematics, analytical methods and applications［J］. Lithos, 2001,55(1-4):195-212. [19] George S C, Volk H, Ahmed M. Geochemical analysis techniques and geological applications of oil-bearing fluid inclusions, with some Australian case studies［J］. Journal of Petroleum Science & Engineering, 2007, 57(1-2):119-138. [20] 周中毅,盛国英.塔里木盆地古地温与深部找油(气)前景［J］.地球化学, 1985,9(3): 236-241. [21] 李慧莉,邱楠生,金之钧,等.塔里木盆地的热史［J］.石油与天然气地质, 2005,26(5):613-617. -
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