准噶尔盆地车排子凸起石炭系火山岩储层特征及主控因素研究
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1.中国石化胜利油田分公司勘探开发研究院;2.中国石油大学北京油气资源与探测国家重点实验室

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P618.13

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Study on Carboniferous Volcanic Rock Reservoir Characteristics and Main Controlling Factors in Chepaizi Uplift, the Junggar Basin
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1.Research Institute of Exploration and Development,SINOPEC Shengli Oilfield Company;2.State Key Laboratory of Petroleum Resources and Prospecting

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    摘要:

    为研究火山岩储层特征及主控因素,本文利用岩心观察、铸体薄片鉴定、物性测试以及测井资料分析对准噶尔盆地石炭系火山岩储层特征及分布、主控因素进行研究。结果表明:车排子地区石炭系火山岩储层主要发育火山溢流相、爆发相,凝灰岩相和火山沉积相,岩性主要为安山岩、玄武岩、火山角砾岩、凝灰岩以及凝灰质砂岩;储集空间依据孔隙与裂缝的配置关系划分为连通孔隙型、裂缝型、裂缝-孔隙型以及孔-洞-缝型;受岩性岩相、风化淋滤作用以及构造作用影响,储集性能具有强非均质性,优势储层岩性为安山岩,火山角砾岩以及凝灰岩,石炭系顶部发育黏土层、水解层、风化淋滤层三层风化壳结构,极大的改善了储层物性,裂缝是储层发育的有效补充因素。区别于前人侧重于刻画火山岩优势储层特征,基于岩性岩相、风化淋滤、走滑断裂对储层的耦合控制作用,创新认识了研究区主要发育断壳体以及断缝体两种火山岩优势储层发育模式,研究结果对车排子地区石炭系油气资源由东向西开拓具有一定的指导意义。

    Abstract:

    To study the characteristics and main controlling factors of volcanic reservoirs, this paper investigates the characteristics, distribution, and main controlling factors of Carboniferous volcanic reservoirs in the Junggar Basin using core observation, thin section identification, physical property testing, and well logging data analysis. The results show that in the Chepaizi area, Carboniferous volcanic reservoirs are mainly developed in volcanic overflow facies, eruption facies, tuffaceous facies, and volcanic sedimentary facies. The lithology mainly includes andesite, basalt, volcanic breccia, tuff, and tuffaceous sandstone. According to the configuration relationship of pores and fractures, reservoir space is divided into connected pore type, fracture type, fracture-pore type, and pore-hole-fracture type. Influenced by lithology, lithofacies, weathering leaching, and tectonic processes, the reservoir heterogeneity is strong. The dominant reservoir lithologies are andesite, volcanic breccia, and tuff. The Carboniferous top develops a three-layer weathering crust structure of clay layer, hydrolysis layer, and weathering leaching layer, greatly improving the reservoir physical properties. Fractures are an effective supplementary factor for reservoir development. Unlike previous studies focusing on describing the characteristics of volcanic rock dominant reservoirs, this study innovatively recognizes two dominant reservoir development models of volcanic rock bodies and fracture bodies based on lithofacies, weathering leaching, and strike-slip faults controlling the reservoirs. The research results have certain guiding significance for the east-west exploration of oil and gas resources in the Chepaizi area of the Carboniferous.

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王千军,任新成,张曰静,等. 准噶尔盆地车排子凸起石炭系火山岩储层特征及主控因素研究[J]. 科学技术与工程, , ():

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  • 收稿日期:2023-12-08
  • 最后修改日期:2024-07-04
  • 录用日期:2024-07-09
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