| 塔河油田奥陶系岩溶储层垂向带发育特征及其识别标准 |
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| 引用本文： | 邹胜章,夏日元,刘莉,唐建生,梁彬.塔河油田奥陶系岩溶储层垂向带发育特征及其识别标准[J].地质学报,2016,90(9):2490-2501. |
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| 作者姓名： | 邹胜章 夏日元 刘莉 唐建生 梁彬 |
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| 作者单位： | 中国地质科学院岩溶地质研究所/国土资源部岩溶动力学重点实验室，广西桂林, 541004,中国地质科学院岩溶地质研究所/国土资源部岩溶动力学重点实验室，广西桂林, 541004,中国石油化工股份有限公司西北油田分公司勘探开发研究院，新疆乌鲁木齐, 830011,中国地质科学院岩溶地质研究所/国土资源部岩溶动力学重点实验室，广西桂林, 541004,中国地质科学院岩溶地质研究所/国土资源部岩溶动力学重点实验室，广西桂林, 541004 |
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| 基金项目： | 本文为国家“973”项目（编号2011CB201001）及国土资源部公益性行业科研专项（编号201211082）资助成果 |
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| 摘 要： | 岩溶储层在垂向上的分带性是岩溶在垂向上发育不均匀的客观表现。根据现代岩溶理论,通过对大量测井资料的统计分析,按照岩溶缝洞系统发育强弱及地下水运动方式、岩溶作用方式,将岩溶储层垂向上划分为表层岩溶带、垂向渗滤溶蚀带、径流溶蚀带、潜流溶蚀带等四个岩溶发育带,并建立了塔河油田奥陶系岩溶储层垂向带划分的测井响应与岩溶成因组合指标体系。测井响应指标包括自然伽玛、电阻率、井径等;岩溶成因指标包括地下水径流方式、岩溶作用类型、充填特征和岩溶个体形态等。根据岩溶储层垂向带划分标准,对塔河油田奥陶系岩溶储层垂向带发育特征进行了统计分析,并对不同地貌区岩溶储层的垂向带发育特征进行分析。分析认为:表层岩溶带以大中型溶蚀孔洞为主,测井显示为高伽玛,低电阻;半充填(或未充填)时测井表现为低伽玛,低电阻;垂向渗滤溶蚀带以高角度溶缝和小型溶蚀孔洞为特征,测井显示为低伽玛,高电阻;径流溶蚀带多发育大型溶洞,测井显示为高伽玛,低电阻;潜流溶蚀带岩溶弱发育,测井显示为低伽玛,高电阻。
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| 关 键 词： | 塔河油田 奥陶系 岩溶储层 垂向分带 划分标准 |
| 收稿时间： | 5/3/2016 12:00:00 AM |
| 修稿时间： | 2016/8/26 0:00:00 |
Vertical Zone Characteristics and Identification Standard of Ordovician Karst Reservoirs in the Tahe Oilfield |
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| ZOU Shengzhang,XIA Riyuan,LIU Li,TANG Jiansheng and LIANG Bin.Vertical Zone Characteristics and Identification Standard of Ordovician Karst Reservoirs in the Tahe Oilfield[J].Acta Geologica Sinica,2016,90(9):2490-2501. |
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| Authors: | ZOU Shengzhang XIA Riyuan LIU Li TANG Jiansheng and LIANG Bin |
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| Institution: | Institute of Karst Geology, CAGS, Karst Dynamics Laboratory, MLR & GZAR, Guilin, Guangxi, 541004,Institute of Karst Geology, CAGS, Karst Dynamics Laboratory, MLR & GZAR, Guilin, Guangxi, 541004,Exploration and Development Research Institute, Northwest Oilfield Branch Company, SINOPEC, Urumchi, 830011,Institute of Karst Geology, CAGS, Karst Dynamics Laboratory, MLR & GZAR, Guilin, Guangxi, 541004 and Institute of Karst Geology, CAGS, Karst Dynamics Laboratory, MLR & GZAR, Guilin, Guangxi, 541004 |
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| Abstract: | The zoning of karst reservoir in vertical direction is the objective manifestation of the uneven development of karst in the vertical direction.According to the theory of modern karst, through the statistical analysis of a large number of logging data, on the basis of the development of the fracture cavity system, the mode of groundwater movement and the way of karstic action, the vertical structure of karst reservoir was classified into four karst zones namely, epikarst zone, vertical percolate corrosion zone, runoff corrosion zone, and phreatic corrosion zone. The index system of the well logging response and karst formation on the vertical zone division of the Ordovician karst reservoir in Tahe oilfield was established. The index of well logging response includes natural gamma, resistivity, well diameter and so on. Karst genetic indicators include groundwater runoff, the types of karstification, the filling characteristics and karst individual form. According to the division standard, the development characteristics of vertical zones in the Ordovician karst reservoirs in Tahe oilfield were analyzed statistically. And the vertical zoning development characteristics of karst reservoirs in different landform areas were analyzed. Analysis shows that epikarst zone with large and medium sized pores, logging shows Gaugama, low resistance; and semi filling (or not filling) when logging is Bagama, low resistance. The vertical percolate corrosion zone is characterized by high angle dissolution and small corrosion holes, and the well log is Bagama. The runoff corrosion zone with more large caves is shown Gaugama and low resistance. The phreatic corrosion zone with weak karstification is shown low gama and high resistance. |
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