| 海西早期岩溶改造作用及古地貌恢复:以塔河2区为例 |
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| 引用本文： | 周丽梅,张江江.海西早期岩溶改造作用及古地貌恢复:以塔河2区为例[J].地质科技通报,2015,34(4):51-56. |
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| 作者姓名： | 周丽梅 张江江 |
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| 作者单位： | 1. 西南石油大学油气藏地质及开发工程国家重点实验室, 成都 610500; |
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| 摘 要： | 塔河油田2区奥陶系储层为一间房组碳酸盐岩礁滩相地层,结合储层岩心、岩石薄片、测井分析及地球化学特征,进行了构造-沉积特征研究,通过井震结合,应用填平补齐法,恢复了该区及周缘奥陶系顶面海西早期岩溶古地貌,并划分为4个亚地貌单元,分析了奥陶系储层特征及成岩作用,研究了储层岩溶作用期次,得出海西早期的溶蚀-岩溶-构造破裂是储层改造的主要作用机制;通过现今钻井缝洞单元分布,结合海西早期岩溶古地貌、古水系及断裂控制,提出了储层发育的有利区带,得出环T443、TK220、T207井附近泄水洼凼北部区域是岩溶储层发育最有利区域。
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| 关 键 词： | 改造 有利区带 期次 古地貌 岩溶 |
| 收稿时间： | 2014-09-05 |
Early Hercynian Karst Reconstruction and Ancient Landform Recovery: Take Area 2 in Tahe Oilfield as an Example |
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| Affiliation: | 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(SWPU), Chengdu 610500, China;2. Research Institute of Exploration and Development, Northwest Oilfield Company, SINOPEC, Urumqi 830011, China;3. Engineering Research Institute, Northwest Oilfield Company, SINOPEC, Urumqi 830011, China |
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| Abstract: | The area 2 of Tahe oilfield of the Ordovician Yijianfang Formation reservoir is carbonate reef flat facies strata.This paper studies the characteristics of tectonic and sedimentary by analyzing reservoir cores,rock thin section,logging data and geochemical characteristics.This paper also reconstructs the top surface of Early Hercynian karst palaeogeomorphology of the study region and surrounding area by the method of combination of well and seismic,and the method of refilling and polishing.The surface is divided into 4 sub-geomorphic unit.We analyze the reservoir characteristics and diagenesis of the Ordovician reservoir,and evaluate the karst stages.The results show that the Early Hercynian karst and karst tectonic fracture is the main mechanism of reservoir reconstruction.Through the current drilling fracture cave unit distribution,combined with Early Hercynian karst palaeogeomorphology,ancient water system and fracture control,the favorable area for reservoir development zone is identified.The ring T443,TK220,T207 well near discharge Wadang northern region are the most favorable areas of karst reservoir. |
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