| 南堡凹陷下古生界表生岩溶和埋藏岩溶储层识别标志 |
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| 引用本文： | 刘兴瑀,孟令箭,毛 毳,刘晶晶,张云峰,袁红旗,何春波,李婷婷,吴海光,张 青.南堡凹陷下古生界表生岩溶和埋藏岩溶储层识别标志[J].中州煤炭,2023,0(4):73-81. |
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| 作者姓名： | 刘兴瑀 孟令箭 毛 毳 刘晶晶 张云峰 袁红旗 何春波 李婷婷 吴海光 张 青 |
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| 作者单位： | （1.东北石油大学 地球科学学院，黑龙江 大庆 163318； 2.中国石油冀东油田勘探开发研究院，河北 唐山 063004； 3.中国石油大学（华东） 地球科学与技术学院，山东 青岛 266000） |
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| 摘 要： | 南堡凹陷碳酸盐岩潜山是重要的深层油田勘探领域，具有埋藏深、时代老、构造运动复杂、多期岩溶作用的特点。通过研究南堡凹陷下古生界岩溶储层的岩心、钻井、测井、地震响应特征和地球化学特征，分析表生岩溶储层和埋藏岩溶储层的识别标志，确立识别方案。结果表明，表生岩溶储层主要分布在寒武系—奥陶系潜山顶部的马家沟组石灰岩中，表生岩溶影响范围可达不整合面之下170 m，储层段有漏失无放空无明显的空洞；具有岩心发育角砾、淡水方解石；测井响应高自然伽马、高声波时差、高中子孔隙度、低电阻率、低岩石密度；地震反射呈不连续或杂乱反射的特征。埋藏岩溶储层主要分布在寒武系毛庄组的内幕白云岩中，储层段缝合线发生扩溶，并伴生粗大方解石充填其中；见成藏期流体淬灭方解石；测井响应具有低伽马、高密度、高电阻率特征。受岩性和断裂控制，埋藏岩溶多沿断裂、缝洞发育。以钻井、测井响应特征为首要识别标志，岩心和地震反射特征为次要识别标志，地球化学特征为辅助识别标志，实现岩溶储层精准识别预测。
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| 关 键 词： | 南堡凹陷 下古生界 表生岩溶储层 埋藏岩溶储层 识别标志 |
Identification marks of Lower Paleozoic supergene karst and burial karst reservoirs in Nanpu Sag |
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| Liu Xingyu,Meng Lingjian,Mao Cui,Liu Jingjing,Zhang Yunfeng,Yuan Hongqi,He Chunbo,Li Tingting,Wu Haiguang,Zhang Qing. Identification marks of Lower Paleozoic supergene karst and burial karst reservoirs in Nanpu Sag[J].Zhongzhou Coal,2023,0(4):73-81. |
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| Authors: | Liu Xingyu Meng Lingjian Mao Cui Liu Jingjing Zhang Yunfeng Yuan Hongqi He Chunbo Li Tingting Wu Haiguang Zhang Qing |
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| Affiliation: | （1.School of Earth Sciences，Northeast Petroleum University，Daqing 163318，China；2.Research Institue for Exploration and Development，PetroChina Jidong Oilfield Company，Tangshan 063004，China；3.College of Geosciences，China University of Petroleum（East China），Qingdao 266000，China） |
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| Abstract: | Carbonate buried hill in Nanpu Sag is an important field of deep oil exploration，which is characterized by deep burial，old age，complex tectonic movement and multik-stage karstification.In this paper，through studying the core，drilling，logging，seismic response features and geochemical features of the Lower Paleozoic karst reservoir in Nanpu sag，the identification marks of supergene karst reservoir and buried karst reservoir are analyzed，and the identification scheme is established.The results show that the supergene karst reservoirs are mainly distributed in the Majiagou Formation limestone on the top of the Cambrian-Ordovician buried hill，and the influence range of supergene karst can reach 170 m below the unconformity.The reservoir section has leakage without venting without obvious cavity，and there are breccia developed in the core and fresh water calcite.Logging response high natural gamma，high acoustic time difference，high neutron porosity，low resistivity，low rock density.Seismic reflection is characterized by discontinuous or disordered reflection.The buried karst reservoirs are mainly distributed in the inner dolomite of Cambrian Maozhuang Formation.The sutures of the reservoir segment are dissolved and filled with coarse calcite.Calcite was quenched by fluid during reservoir formation.The logging response is characterized by low gamma，high density and high resistivity.Controlled by lithology and faults，buried karst is mostly developed along faults，fractures and caves.With drilling and logging response features as the primary identification mark，core and seismic reflection features as the secondary identification mark，geochemical features as the auxiliary identification mark，the accurate identification and prediction of karst reservoir can be realized. |
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| Keywords: | ,Nanpu Sag, Lower Paleozoic, supergene karst reservoir, buried karst reservoir, identification marks |
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