伊拉克X油藏Asmari组储层孔缝特征研究

发布时间：2018-03-20 01:38

本文选题：伊拉克　切入点：Asmari组　出处：《西南石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：伊拉克X油田是中海油对外合作开发的一个碳酸盐岩油田,在开发过程中表现出诸多与国内碳酸盐岩油藏的差异性,研究区的储层孔缝如何分布、有何特征尚不清楚,因此深入研究其储层孔缝特征具有重要意义。本文以x油藏Asmari组为研究对象,运用沉积岩石学、储层地质学、测井地质学和地球物理综合解释等理论,综合了大量岩心、分析化验、测井和地震等资料,采用宏观与微观分析相结合,系统分析了研究区储层孔缝特征,并对储层孔缝在三维空间的分布做出了预测,取得成果和认识如下： (1)根据岩心观察、薄片鉴定,伊拉克X油藏Asmari组储层的空隙主要为次生的溶孔,同时还有裂缝和溶洞。根据统计结果发现,储层孔隙类型以基质孔隙型为主,局部含裂缝和溶洞。 (2)通过常规测井资料和曲线元识别,识别出的Asmari组空隙类型有裂缝和溶洞。根据识别出的类型特征,我们分别定义为基质孔隙相、裂缝-孔隙相和溶洞孔隙相。 (3)通过对Asmari组的断裂发生指数、膨胀系数、高斯曲率、应力场轨迹和地震数据的相干体属性分析表明,研究区的潜在断裂多发育在X-3,X-25,X-28井区附近。 (4)基于多相及随机建模方法,依靠逐级标定、储渗介质相及其随机建模,通过信息的跨尺度传递与多空间融合,实现对孔、洞、缝的三维表征。由此对研究区Asmari组储层的孔缝相进行空间三维预测。 (5)通过产能分析发现产能高的小层缝洞发育较多,同时物性统计也发现该小层的渗透率也要明显大于其他小层。
[Abstract]:Iraq X oil field is a carbonate oil field developed by CNOOC in cooperation with foreign countries. In the process of development, it is not clear that there are many differences between Iraq and domestic carbonate reservoirs, how the pore fractures are distributed in the study area, and what the characteristics are. Therefore, it is of great significance to study the pore and fracture characteristics of the reservoir. In this paper, a large number of cores have been synthesized using the theories of sedimentary petrology, reservoir geology, logging geology and geophysical interpretation, taking the Asmari formation of x reservoir as the research object, and applying the theories of sedimentary petrology, reservoir geology, logging geology and geophysical interpretation, etc. Based on the analysis of laboratory data, logging and seismic data, the characteristics of reservoir pore fractures in the study area are systematically analyzed by combining macro and micro analysis, and the distribution of reservoir pore fractures in 3D space is predicted. The results and understandings are as follows:. (1) according to core observation and thin section identification, the porosity of Asmari formation reservoir in Iraq X reservoir is mainly secondary dissolved pores, as well as fractures and caverns. According to the statistical results, the pore type of reservoir is mainly matrix pore type. Local cracks and caverns. (2) through conventional logging data and curve element recognition, the Asmari group voids are identified as fractures and cavities. According to the identified types, we define them as matrix pore facies, fracture-pore facies and cavern pore facies respectively. Through the analysis of the fracture occurrence index, expansion coefficient, Gao Si curvature, the track of stress field and the coherence attribute of seismic data in Asmari formation, it is shown that the potential faults in the study area are mostly developed near the X-3X-25X-28 well area. Based on the multi-phase and stochastic modeling method, depending on the step by step calibration, the storage medium phase and its random modeling, through the cross-scale transmission of information and the fusion of multi-space, the hole and hole can be realized. Three-dimensional characterization of fractures. Therefore, three dimensional prediction of pore facies in Asmari formation reservoir is carried out. 5) through productivity analysis, it is found that there are more fractures and cavities in the layer with high productivity, and the permeability of the layer is obviously larger than that of the other layers.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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