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首页> 外文会议>International Symposium of the Society of Core Analysts >UPSCALING FROM CORE DATA TO PRODUCTION: CLOSING THE CYCLE.A CASE STUDY IN THE SANTA BARBARA AND PIRITAL FIELDS,EASTERN VENEZUELA BASIN
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UPSCALING FROM CORE DATA TO PRODUCTION: CLOSING THE CYCLE.A CASE STUDY IN THE SANTA BARBARA AND PIRITAL FIELDS,EASTERN VENEZUELA BASIN

机译：从核心数据到生产的升级：关闭周期。在圣巴巴拉和委内瑞拉盆地的圣巴巴拉和波提塔田的案例研究

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The Santa Barbara and Pirital fields are located in the North Monagas trend in the Eastern Venezuela Basin.Reservoirs in this trend are characterized by high initial temperature and pressure,and high initial production rates.A tar mat is present at the base of the oil column,acting as a barrier between the aquifers below and the oilcontaining formations above.The drive mechanism is solution gas drive and fluid expansion,with reservoir pressure declining rapidly.The hydrocarbon column varies from a gas-condensate cap at the top of the structure to heavy oil at the bottom.The petrophysical characterization incorporated the analysis of the complex variations in pore and pore throat size that control initial and residual fluid distribution and fluid flow through the reservoirs.Conventional core porosity and permeability,mercury injection capillary pressure,relative permeability,and mineralogical data were used to characterize the reservoir into rock types having similar flow and storage capacity.Water saturation,all of which is considered immobile,was found to be dependent on rock type,with pore throat being the dominant control on the flow characteristics of the reservoirs.Mercury injection capillary pressure data provided useful information about effective pore throat radii,which were semi-quantitatively related to several reservoir responses,such as permeability,porosity,irreducible water saturation,and a capillary pressure profile or pore throat type curve.A methodology was developed to estimate flow behavior of the different flow units from the integration of rock,reservoir and fluid properties,analyzing the variables that affect production logs,reservoir conditions and the rock types determined.Production curves per foot of perforated interval,curves representing rock quality and a modification of the Vertical Stratigraphic Flow and Storage Diagram were used to cross-correlate different parameters in order to define relations between production rates and rock types,considering the effect of pressure differential between the borehole and the formation,as well as the characteristics of the fluids present in the formation.A clear relation was obtained between rock properties of the perforated zones and the production that they contribute to the total well influx.As expected,better relations were encountered for oil-producing than for gas/condensate-producing wells,since gas production is less dependent on rock quality.
机译：圣塔巴巴拉和波提塔领域位于东委内瑞拉盆地的北蒙古斯趋势。这种趋势的初始初始温度和压力的特点，高初始生产率。油柱底部存在高初始生产率。 ，作为下面的含水层和上述油线结构之间的屏障。驱动机构是解决方案气体驱动和流体膨胀，储层压力迅速下降。烃柱从结构顶部的气凝胶盖变化到重物顶部底部的油。岩石物理表征掺入了孔隙和孔喉部尺寸的复杂变化的分析，可通过储层控制初始和残余的流体分布和流体流动。转化核心孔隙率和渗透性，汞注射毛细管压力，相对渗透性和渗透性矿物学数据用于将储存器描绘成具有类似流动和储存的岩石类型Pacity.Water饱和度，所有这些都被认为是不动的，发现依赖于岩石类型，毛孔喉部是对储层的流动特性的主导控制。注射毛细管压力数据提供了有关有效孔喉桡骨的有用信息，其与几种储层反应进行半定量相关，例如渗透性，孔隙率，不可缩续的水饱和度和毛细管压力曲线或孔隙型曲线。开发了方法，以估计不同流量单元的流动行为从岩石的整合中估算不同流量单元的流动行为，储层和流体性质，分析影响生产原木，储层条件和确定的岩石类型的变量。穿孔间隔的每脚的生产曲线，代表岩石质量的曲线和垂直地层流动和存储图的变形例用于交叉 - 相关参数以定义生产率和岩型之间的关系S，考虑到钻孔与地层之间的压差的影响，以及存在于地层中存在的流体的特性。在穿孔区域的岩石性质和它们对总井贡献的生产之间获得了明确的关系流入。预期，遇到更好的关系，用于生产石油，而不是燃气/冷凝水生产井，因为天然气生产不太依赖于岩石质量。

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