X射线衍射分析录井技术在银额盆地哈日凹陷的应用  

Application of the X-ray diffraction analysis of the logging technology in Hari sag, Yin’e Basin

作　　者：胡登平 吕敏 王明倩 凡朝波 HU Deng-ping;LYU Min;WANG Ming-qian;FAN Chao-bo(No.4 Gas Production Plant of Yanchang Gas Field.Shaanxi Yanchang Petroleum(Group)Corp.Ltd.,Yanan 716000,Shaanxi China)

机构地区：[1]陕西延长石油(集团)有限责任公司延长气田采气四厂,陕西延安716000

出　　处：《宝鸡文理学院学报（自然科学版）》2020年第2期53-58,共6页Journal of Baoji University of Arts and Sciences(Natural Science Edition)

摘　　要：目的为银额盆地哈日凹陷的进一步勘探提供理论基础,同时深化X射线衍射分析录井技术在地质开采领域的应用,促进录井技术进步,提高勘探开发效益。方法采用X射线衍射分析录井技术,在银额盆地哈日凹陷对岩石的矿物组成含量、岩性快速识别、地层层位确定、沉积环境判断等方面的应用情况进行总结与探讨。结果分析认为Yh-4井钻至井深1371~1396 m时,将岩性定名为灰色含凝灰白云质粉砂岩;Yh-4井钻至井深2784 m时,参照邻井资料和区域地层岩性划分,表明从该井深起,地层进入上古生界二叠系;Yh-5井钻至井深1026 m时,地层进入勘探主要目的层中生界白垩系下统苏红图组;Yh-5井钻至井深3520 m时,地层已进入上古生界石炭系。根据X射线衍射分析结果,哈日凹陷碎屑岩岩石类型主要为灰-深灰色泥岩、含灰泥岩、深灰色白云质泥岩、灰色细砂岩、灰色玄武岩等,其中灰色白云质泥岩代表一种见于深湖的低能沉积环境中。结论在大量实验数据对比分析的条件下,结合研究重矿物在平面上分布范围及组合特征确定出物源特点及影响古水流搬运物的区域,为分析沉积物的来源提供有力依据。Purposes—To provide a theoretical basis for further exploration of Hari sag in Yin’e Basin,Inner Mongolia,China and deepen the application of the X-ray diffraction analysis of logging technology in the field of geological exploitation,progress logging technology and improve the efficiency of exploration and development.Methods—The X-ray diffraction analysis of logging technology was applied to summarize and discuss mineral composition and content,rapid identification of lithology,determination of stratigraphic horizon and judgment of sedimentary environment of rocks in Hari sag,Yine Basin.Result—According to the analysis results,when well Yh-4 is drilled to the depth of 1371~1396 m,the lithology is named as gray dolomitic siltstone bearing tuff;when well Yh-4 is drilled to the depth of 2784 m,referring to the adjacent well data and regional stratigraphic lithology division,the stratum from the depth of the well enters the upper Paleozoic Permian system;when well Yh-5 is drilled to the depth of 1026 m,the stratum enters the main target stratum of exploration,namely,the lower Cretaceous Suhongtu formation of Mesozoic era;When well Yh-5 was drilled to a depth of 3520 m,the formation has entered the upper Paleozoic Carboniferous system.According to the results of X-ray diffraction analysis,the main types of clastic rocks in Hari sag are grey-dark grey mudstone,lime-bearing mudstone,dark grey dolomitic mudstone,grey fine sandstone,grey basalt,etc.,among which the grey dolomitic mudstone represents a low-energy sedimentary environment found in the deep lake.Conclusion—Under the condition of comparative analysis of a large number of experimental data,the source characteristics and the areas affecting the ancient water transport are determined in combination with the study of the distribution range and combination characteristics of heavy minerals in the plane,thus providing a strong basis for the analysis of the source of sediments.

关 键 词：X射线衍射 哈日凹陷 岩性识别 地层层位 沉积环境 

分 类 号：TE142[石油与天然气工程—油气勘探]