【作者】 潘昊；

【导师】 杜鸿烈； 王成；

【作者基本信息】 东北石油大学 ， 地质工程， 2010， 硕士

【摘要】 徐家围子断陷特殊储层的勘探取得了良好的效果,展示了特殊储层良好的天然气勘探前景。本论文以火山岩岩石学、储层沉积学等理论为指导,认真分析和借鉴前人研究成果,以25口、17个项目300多块岩心样品的实验室室内岩心分析数据为基础,研究徐家围子断陷营城组火山岩储层特征,并对徐深1井进行单井评价。研究过程中,采用了核磁和CT两项实验技术,用于确定岩心内部孔隙和裂缝的形态、展布,解决裂缝研究中遇到的问题。通过制定火山岩天然气储层分类标准和确定的有效孔隙度勘探下限,解决了储量计算中遇到的问题,对生产起到指导作用。对有利储层的岩性、岩相、孔隙类型和分布做了具体的分析,对成岩作用进行了深入研究,为深层天然气勘探提供依据。确定了火山岩好储层为流纹岩、安山岩、集块岩和风化淋滤带的晶屑凝灰岩,孔隙类型为气孔、杏仁孔、晶粒间孔、斑晶溶孔和构造裂缝、炸裂缝,发育地区以升平-兴城-肇州地区营城组为主。按本文的分类标准,火山岩前三类储层压裂后具有工业产能,火山岩Ⅳ、Ⅴ类在目前工艺条件下压裂难获工业产能,有效储层孔隙度下限为4%,裂缝型储层孔隙度下限可以低于该值。通过对火山岩相与火山岩孔隙和裂缝成因、类型及成岩演化规律等系统研究后认为,好的储层一般位于喷溢相的上部亚相或大段火山岩上部的风化淋滤带,主要地区为升平和肇州地区营城组。确认了胶结和溶解作用是影响储层物性的主要因素以及胶结作用主要发生位置。更多还原

【Abstract】 Exploration of the special reservoirs of Xujiaweizi fault depression have gained good effectiveness and show the cheerful prospect of gas exploration. This subject research on the volcanic reservoir characteristics of Yingcheng formation of Xujiaweizi fault depression, based on the laboratory core analysis data of 25 wells, 17 items more than 300 core samples.Applying the two experimental techniques, NMR and CT, to determine the type and distribution of porosity and fraction in the reservoirs of volcanic rock.This subject stablishes standard of evaluation and classification of reservoirs of volcanic rock, gives the lower limit value of effective porosity, that solve the difficult problems in the reserves calculation and guide the research and the production..This subject provided an gist for the breakthrough of exploration for the deep-seated natural gas. A material prediction about lithology, lithofacies, type and distributing of pore and the study in-depth about diagenism of reservoir were worked out. Identified that, the better volcanic reservoirs are rhyolite, andesite, agglomerate and crystal tuff in the place of weathering and corrosion. The type of pore includes primary vesicular, inneramygdale pore, intercrystalline pore, phenocryst corroded pore and structure fracture, exploding fracture. The developed places lie in Yingcheng oil formation of Shengping-Xingcheng-Zhaozhou.According to the standard of reservoir classification giving by this subject, the frontal three types of volcanic reservoirs can obtain industrial productivity after fracturing.Ⅳ,Ⅴvolcanic reservoirs can not obtain industrial productivity after fracturing in the actual technological conditions. The lower limit value of effective porosity is 4%. The lower limit value of fracture reservoir may be under this value.Through the systems study for volcanic lithofacies and cause, type and diagenetic evolvement rule of pore and fracture, it can be obtained that better reservoirs mainly lie in the upper introfacies of eruptive facies or the zone of weathering and corrosion of the upper volcanic rock, Yingcheng oil formation of Shengping and Zhaozhou.Confirmed the cementation and solution are the main factors influencing the especial reservoir quality, and the location of cementation mainly occurs.更多还原