| 塔里木盆地哈拉哈塘地区奥陶系储层古岩溶作用及其与裂缝的关系 |
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| 引用本文： | 吴国强,张丽娟,杨振周,袁文芳,齐春艳,叶禹.塔里木盆地哈拉哈塘地区奥陶系储层古岩溶作用及其与裂缝的关系[J].石油实验地质,2017,39(6):790-796. |
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| 作者姓名： | 吴国强 张丽娟 杨振周 袁文芳 齐春艳 叶禹 |
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| 作者单位： | 1.中国石油 休斯敦技术研究中心, 北京 100028 |
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| 基金项目： | 中石油塔里木重大专项之"塔北超深碳酸盐岩油藏勘探开发关键技术"（2014E-2015）资助。 |
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| 摘 要： | 塔里木盆地哈拉哈塘地区奥陶系为碳酸盐岩裂缝溶洞型储层，通过野外露头考察、岩心观察、薄片分析、扫描电镜-阴极发光谱分析、扫描电镜-X射线能谱分析等多种分析手段，综合分析了奥陶系储层的古岩溶作用类型及特征。通过野外露头类比，在西克尔露头识别出了粗粒垮塌杂乱角砾岩、细粒搬运杂乱角砾岩、高度扰动地层和未扰动地层等4种古洞穴相；通过岩心观察，在奥陶系不同层位均识别出了与古洞穴相关的杂乱角砾岩。奥陶系储层经历了准同生期岩溶、风化壳岩溶和埋藏岩溶3种不同的岩溶作用，形成的溶孔内部胶结物表现出不同的阴极发光谱特征。储层内部大量发育的裂缝对于埋藏岩溶作用具有重要影响，一方面可沟通缝合线系统，促进岩溶作用；另一方面直接沟通深部热液，导致岩溶作用的发生。
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| 关 键 词： | 岩溶作用 碳酸盐岩 奥陶系 哈拉哈塘地区 塔里木盆地 |
| 收稿时间： | 2017-08-08 |
Paleo-karstification of the Ordovician carbonate reservoirs and the relationship with fractures in the Halahatang area of Tarim Basin |
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| Affiliation: | 1.CNPC USA Corporation, Beijing 100028, China2. Tarim Oilfield, PetroChina, Korla, Xinjiang 841000, China |
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| Abstract: | The Ordovician reservoirs in the Halahatang area of Tarim Basin are carbonate reservoirs and the storage space is karstic vugs and fractures. Types and characteristics of paleo-karstification in the Ordovician carbonate reservoirs were comprehensively analyzed by outcrop study, core observation, thin section analysis, SEM-CL spectrum and SEM-EDS analysis. Coarse-clast collapsed chaotic breccia facies, fine-clast transported chaotic breccia facies, highly disturbed strata facies and undisturbed strata facies were identified in the Xikeer outcrop by outcrop analog. Chaotic breccia related to paleo-caves was found in different formations of the Ordovician under core observation. The Ordovician reservoir experienced three types of paleo-karstification, including penecontemporaneous karstification, weathering karstification and buried karstification. Different karstic vugs demonstrated different SEM-CL spectrums. Widely developed fractures in the reservoir have a significant influence on burial karstification. On one hand, factures promoted karstification by connecting stylolite networks; on the other hand, fractures induced karstification by carrying deep hydrothermal fluids into the reservoir. |
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