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首页> 外文会议>Annual conference of the Canadian Society for Civil Engineering;Conference of the Canadian Society for Civil Engineering;Congres annuel de la Societe Canadienne de Genie Civil;CSCE2003 >Application Of Sequence Stratigraphy And Petrography In Preparation Of Reservoir Rock Typing Scheme In One Of Thamama Gas Reservoirs Of Onshore Abu Dhabi
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Application Of Sequence Stratigraphy And Petrography In Preparation Of Reservoir Rock Typing Scheme In One Of Thamama Gas Reservoirs Of Onshore Abu Dhabi

机译：层序地层学和岩相学在阿布扎比陆上塔玛玛气藏之一储层岩性分类方案编制中的应用

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Applying the sequence stratigraphy principles, the upper partof Zakum Formation in Field “B”, Onshore Abu Dhabi, isdivided into two parasequence sets. The lower part comprisesof a progradational interval overlain by a retrogradationalpackage, with the boundary between each package marking astillstand. These two parasequence sets are believed torepresent highstand deposition with punctuated sea level risecreating alternately progradational andretrogradational packages.This reservoir is one of the major gas-producing zone andcomprises of five lithofacies; bioclastic peloidal grainstone,algal packstone/floatstone, bioclastic peloidal packstone, algalwackestone/floatstone and bioclastic peloidal wackestone/packstone. These sediments are believed to have beendeposited on a homoclinal carbonate ramp that dipped verygently seaward; with inner ramp deposits making up thereservoir zone and middle ramp deposits the dense interval.Porosity and permeability are well developed in the reservoirsections due to a lack of pore-filling cements. Pore typesinclude primary intergranular, intercrystalline micropores,primary organic and secondary dissolution. Reservoir qualityis for the most part facies controlled, although with asignificant diagenetic overprint due to widespread dissolution.The best reservoir quality is associated with the bioclasticpeloidal grainstone and Lithocodium packstone/floatstonelithofacies, which can be demonstrated to show an order ofmagnitude, increase in permeability compared withadjacent lithofacies. Analysis of both thin section descriptions and high pressuremercury injection have led to the identification of fivedistinctive rock types (RT I to RT V) within the upper part ofZakum reservoir. A rock type is defined as a reservoir rockwithin which the geological and petrophysical properties thateffect fluid flow are consistent and predictable. Accordingly,each reservoir rock type has a certain effective pore throat sizedistribution, which will produce a particular family ofcapillary pressure curves and controls porosity, permeabilityand water saturation.RT I occurs in grainstone lithofacies and characterized bywell-connected interparticle porous network that will promotegood to very good permeability. RT II is represented bypackstone and Lithocodium packstone/floatsone lithofacies.The main pore types are enhanced intercrystalline mesoporesassociated with microporosity in the mud matrix and primaryintraparticle macropores associated with the Lithocodium.However, the secondary pore types are more common than theprimary pores. RT III is similar to RT II as lithofacies,however, the primary pore types are more common than thesecondary pores. RT IV occurs in wackestone andLithocodium wackestone/ floatsone lithofacies where thedominant pore types are secondary intercrystalline mesopores.RT V is represented by the wackestone/packstone lithofacieswith intercrystalline micropores associated with the limemud matrix.
机译：应用层序地层学原理，上半部分 阿布扎比陆上“ B”油田的扎科姆组 分为两个副序列集。下部包括 渐进覆盖由渐进覆盖的渐进间隔 包装，每个包装之间的边界标记一个 静止不动。这两个副序列集被认为是 代表高潮沉积，标点海平面上升 创造交替的等级和 退学包。 该储层是主要的产气区之一， 包括五个岩相;生物碎屑状角砾岩， 藻类结石/浮石，生物碎屑性结石，藻类 瓦斯通/浮石和生物碎屑状瓦斯通/ 泥石。这些沉积物被认为是 沉积在非常倾斜的单斜碳酸盐斜坡上 轻轻地向海;内部坡道沉积物弥补了 储集层带和中间斜坡沉积的致密层段。 储层中孔隙度和渗透率发育良好 由于缺乏孔隙填充水泥而导致的断面。孔类型 包括主要的晶间，晶间微孔， 一次有机和二次溶解。储层质量 在大多数情况下是相控的，尽管有 由于广泛溶解，导致明显的成岩叠印。 最佳储层质量与生物碎屑有关 准方晶石和锂co石/浮石 岩相，可以被证明显示顺序 量级，渗透率与 相邻的岩相。薄截面描述和高压分析 汞注入导致五种物质的鉴定 上半部独特的岩石类型（RT I至RT V） 扎库姆水库。岩石类型定义为储层岩石 其中的地质和岩石物理特性 影响流体的流量是一致且可预测的。因此， 每种储集岩类型都有一定的有效孔喉尺寸 发行，这将产生一个特定的 毛细压力曲线，控制孔隙率，渗透率 和水饱和度。 RT I发生在粒岩岩相中，其特征是 紧密连接的粒子间多孔网络将促进 良好到非常好的渗透性。 RT II由 碎石和石棉碎石/浮石岩相。 主要的孔类型是增强的晶间介孔 与泥浆基质和初级中的微孔性有关 与锂co相关的颗粒内大孔。 但是，次生孔类型比 初级毛孔。 RT III与RT II的岩相相似， 但是，主要的毛孔类型比毛孔更普遍。 次生毛孔。 RT IV发生在wackestone和 石蜡瓦克石/浮石岩相 主要的孔类型是次晶间介孔。 瓦特斯通/包裹岩岩相代表了RT V 具有与石灰相关的晶间微孔 泥浆基质。

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