【作者】 肖岩岩；

【导师】 张云峰；

【作者基本信息】 东北石油大学 ， 矿产普查与勘探， 2012， 硕士

【摘要】 南贝尔凹陷是海塔盆地中部断陷带的一个重要勘探研究的凹陷，位于蒙古境内的塔木察格盆地，勘探面积约3500km2，地势呈现西高东低、南高北低的态势。在近年来的勘探中在基岩潜山中发现了很好的油气显示，基岩潜山的地质情况比较复杂，对深层的地质认识还不够深入，勘探程度还不高，没有对储层孔-洞-缝分布规律有足够的认识，为了尽快加大对研究区的勘探步伐，需要加大努力对深部潜山储层的研究。本文通过综合利用研究区各种地质资料，对研究区基岩潜山各项地质条件进行分析研究。其中主要分析了基岩储层的岩石学特征、物性特征及成岩作用，并划分成岩序列及成岩相，并首次运用利用曲率法、有限元数值模拟法对基岩裂缝的发育分布情况进行分析和预测，结合上述研究指出储层有利勘探区。南贝尔凹陷基岩潜山储层主要有两种岩性，分别为火山碎屑岩和碎屑岩。其中，碎屑岩以岩屑长石砂岩为主，其次为长石岩屑砂岩。南贝尔凹陷基岩储层孔渗值变化较大，孔隙度值平均为6.2%，属于特低孔隙度；渗透率平均为0.58×10^-3μm2，整体属于特低渗透率。碎屑岩成岩作用中压实作用、胶结作用、填充作用破坏了储集空间，对有效储层的形成有负面影响，而交代、溶解及破裂作用对次生孔隙的形成有正面影响。火山碎屑岩主要包括凝灰岩、凝灰质砂砾岩、沉凝灰岩，其成岩作用主要包括机械压实作用、机械渗滤作用、脱玻化作用、蚀变作用、胶结作用等。南贝尔凹陷基岩储层主要成岩阶段为中成岩阶段B期。通过对储层的综合评价得知，南贝尔凹陷东次凹南洼槽主要发育Ⅱ、Ⅲ类储层，西次凹南洼槽主要发育Ⅲ类储层，南贝尔凹陷南部潜山披覆带则主要发育Ⅳ类储层。更多还原

【Abstract】 Nanbeier depression in Haita Basin Central faulted belt is an important exploration sag,located in Mongolia of Tamtsag Basin, exploration area of about3500km2, topography, EastWest High low north south high-low trend. In recent years the exploration in bedrock foundgood oil and gas shows in buried hill, bedrock geologic conditions are complex, the deepgeological understanding and exploration degree is not high, not on reservoir pore-holegapdistribution have sufficient knowledge, as soon as possible in order to increase the pace ofexploration, need to increase efforts to the deep reservoir of buried hill. In this paper, throughthe study on the comprehensive utilization of all kinds of geological data of study area, thegeological conditions of rock buried hill conducts the analysis research. Mainly analyzed thebedrock reservoir lithology, physical properties and into the rock, and divided into rocksequence and rock phase, and for the first time using the curvature method, the finite elementnumerical simulation method of rock fracture distribution situation analysis and prediction,combine the research pointed out that the favorable reservoir exploration area.Nanbeier depression bedrock Buried hill reservoir mainly has two kinds of lithology,respectively volcano clastic rock and clastic rock. The clastic lithic feldspar sandstone,followed by feldspar lithic sandstone. Nanbeier depression depression rockporosity-permeability value change is bigger, the value of porosity for an average of6.2%,belongs to low porosity; permeability for an average of0.58x10-3m2, overall belongs to lowpermeability. Clastic rocks in into the compaction, cementation, filling the role of destructionof the reservoir space, the effective reservoir formation have negative effects, whilemetasomatism, dissolution and fracturing of secondary pore formation have positive influence.Volcano clastic tuff, tuffaceous sand including (gravel) rock, sedimentary tuff, the rocksmainly include mechanical compaction, mechanical filtration, devitrification, alteration,cementation. Nanbeier depression bedrock reservoir mainly into rock stage for a rock stage B.Based on the comprehensive evaluation of reservoir that, South Baer in East concaveSouthern groove, main development II, III reservoir, West concave Southern groove of themain development of class III reservoir, Nanbeier depression in southern Buried hill drapebelt mainly developed type IV reservoir.更多还原