准噶尔盆地西北缘哈山地区石炭系火山岩储层特征研究

发布时间：2018-01-16 14:33

本文关键词：准噶尔盆地西北缘哈山地区石炭系火山岩储层特征研究　出处：《吉林大学》2017年硕士论文　论文类型：学位论文

【摘要】：本文以哈山地区5口钻井所揭示的石炭系火山岩为研究目标,应用岩心、岩屑、测井、录井资料,结合前人研究成果认识,总结出所发育的岩性岩相类型。通过岩心、铸体薄片观察,结合实测孔渗、核磁孔隙度、含油饱和度和面孔率数据等,总结出火山岩有效储集空间类型及其组合、演化过程,并识别甄选出火山岩储层的优势岩性岩相类型。主要获得的认识和结论如下:1、火山岩岩性、岩相及有效储集空间研究区共发育火成岩岩石类型6类25种,以基性为主,其次是中性;火山岩岩相4相9亚相,以爆发相空落亚相为主,其次是喷溢相下部亚相;火山岩有效储集空间类型2类4亚类15种,孔缝组合类型8种,以次生孔缝为主。2、火山岩储层发育的优势岩性岩相综合考虑物性和含油饱和度,以爆发相空落亚相的经济开发意义最高,岩性类型以玄武质/安山质/英安质/流纹质/复成分火山碎屑岩为主,其次是喷溢相的下部亚相、爆发相热碎屑流亚相与喷溢相的上部亚相,而火山通道相和火山沉积相成储性能较差,更趋向于形成非有效储层。3、储集空间的影响因素、演化过程及发育程度研究区火山岩储集空间受岩性、岩相、成岩作用影响,其发育、演化过程可以划归为3个主阶段5个亚阶段,有效储集空间类型以次生孔缝为主。次生孔缝以填隙物溶蚀孔和基质溶蚀孔最为发育,说明溶蚀作用明显改善火山岩的储集性能。研究区石炭系浅层火山岩储层储集能力最佳,和本地区风化壳发育深度有关,而且当前原生孔保留量与次生孔产生量相等所对应的深度点位于风化壳之内。
[Abstract]:In this paper, the Carboniferous volcanic rocks revealed by 5 drilling wells in Hashan area are taken as the research goal, and the core, cuttings, logging and logging data are used to understand the results of previous studies. The lithologic lithofacies types developed are summarized. The core, casting thin section observation, combined with the measured pore permeability, nuclear magnetic porosity, oil saturation and porosity data. The effective reservoir space types and their assemblages and evolution processes of volcanic rocks are summarized, and the dominant lithofacies types of volcanic reservoirs are identified. The main conclusions are as follows: 1, volcanic lithology. In the study area of lithofacies and effective reservoir space, there are 6 types and 25 species of igneous rocks, which are mainly basic, followed by neutral. The volcanic lithofacies are 4 facies 9 subfacies, mainly erupting facies and falling subfacies, followed by the lower subfacies of the ejection facies. There are 15 types of effective reservoir space type of volcanic rocks, 2 classes and 4 subclasses, and 8 types of pore and fracture assemblages, with secondary pore fractures as the main type. The dominant lithofacies of volcanic reservoir development consider both physical properties and oil saturation. The main lithologic types are Black Tortoise / Anshan / Anshan / amphitic / streamline / complex volcanic clastic rocks, followed by the lower subfacies of the ejection facies. The thermal clastic flow subfacies and the upper subfacies of the eruptive facies, while the volcanic channel facies and volcanic sedimentary facies have poor reservoir performance, and tend to form non-effective reservoir. 3, the influencing factors of reservoir space. The volcanic reservoir space is affected by lithology, lithofacies and diagenesis in the study area of evolution process and degree of development. Its development and evolution can be divided into three main stages and five sub-stages. The main types of effective reservoir space are secondary pore fractures. The most developed secondary pore fractures are interstitial dissolution pores and matrix dissolution pores. The results show that the dissolution can obviously improve the reservoir performance of volcanic rocks. The best reservoir capacity of the shallow Carboniferous volcanic reservoirs in the study area is related to the depth of weathering crust development in this area. Moreover, the depth corresponding to the same amount of primary pore retention and secondary pore production is located in the weathered crust.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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