台盆区碳酸盐岩储层评价方法研究

发布时间：2018-09-10 20:53

【摘要】：塔里木盆地台盆区碳酸盐岩储层油气成藏条件十分优越,但由于地层成岩过程极为复杂,使得台盆区储层岩石矿物组成及岩性具有复杂和多样的特点,且储层埋藏深、类型多样、变化大,导致储层油气藏类型多样且比常规均质储层有更为复杂的空隙空间结构与极强的各向异性,使得油气勘探开发中面临许多难题。本文正是基于以上塔里木盆地台盆区碳酸盐岩储层的特点,通过理论结合实际测井资料,建立了一套相对完善、有效、实用的储层测井参数计算模型,并通过研究工区测井资料,开展储层含流体性质识别研究。碳酸盐岩储层一般具有储集空间结构很复杂、储集体非均质性强的特征,由此致使储层类型的判别及储层相关参数计算就显得很困难了。通过大量岩心观察、薄片鉴定、物性分析、毛管压力分析等资料,系统认识了塔里木台盆区碳酸盐岩储层主要的岩石学特征及储层特征。综合录井、测井、岩心观察及分析结果,将储层分为孔洞型、裂缝-孔洞型、裂缝型,并分析了这三种不同类型储层的测井响应特征。在岩心、薄片资料研究的前提下,匹配主成分岩性分析法、模糊聚类识别法、地层矿物优选模型,建立了适合台盆区碳酸盐岩地层岩性定性定量判别的方法。在计算储层参数之前,进行测井数据标准化以及岩心归位,尽量排除非地质因素及人为因素的影响,以确保测井数据能够反映地层的真实情况,并构造出符合台盆区研究组段的测井参数计算模型,基于碳酸盐岩取芯分析资料和测试资料,较为准确的计算了矿物含量、孔隙度、渗透率、含水饱和度,采用多种方法确定储层有效厚度下限参数,并利用实测资料验证计算模型的有效性。本文在分析工区测井数据、地质录井、岩心、实验化验分析和试油等资料的基础上,重点开展了各类型储层测井参数定量评价和储层流体性质识别的研究,并应用上述研究成果对塔北地区老井钻探失利原因进行分析。
[Abstract]:The oil and gas accumulation conditions of carbonate reservoir in Tai-basin area of Tarim Basin are very superior, but the formation diagenesis process is extremely complex, which makes the rock mineral composition and lithology of Tai-basin reservoir have complex and diverse characteristics, and the reservoir is buried deeply. Because of the diversity of types and great changes, the types of reservoir oil and gas reservoirs are diverse and have more complex void space structure and strong anisotropy than those of conventional homogeneous reservoirs, which makes the exploration and development of oil and gas face many difficulties. Based on the characteristics of carbonate reservoir in the Tai-basin area of Tarim Basin, a set of relatively perfect, effective and practical calculation model of reservoir logging parameters is established by combining theoretical and practical logging data. By studying the logging data of the working area, the identification of the fluid-bearing properties of the reservoir is carried out. Carbonate reservoirs are generally characterized by complex reservoir space structure and strong reservoir heterogeneity, which makes it difficult to distinguish reservoir types and calculate reservoir parameters. The main petrological characteristics and reservoir characteristics of carbonate reservoirs in the Tarim platform basin are systematically recognized through a large number of core observations, sheet identification, physical properties analysis, capillary pressure analysis and so on. According to the results of logging, core observation and analysis, the reservoir is divided into three types: pore type, fracture-hole type and fracture type. The logging response characteristics of these three different types of reservoirs are analyzed. On the premise of studying core and thin slice data, matching principal component lithology analysis method, fuzzy cluster identification method and stratigraphic mineral optimal selection model, a method for quantitative discrimination of carbonate strata lithology in Taipan area is established. Before calculating reservoir parameters, log data standardization and core return should be carried out to eliminate the influence of non-geological factors and human factors as far as possible, so as to ensure that logging data can reflect the real situation of formation. Based on the core analysis data and test data of carbonate rock, the mineral content, porosity, permeability and water saturation are calculated accurately. Several methods are used to determine the lower limit parameters of reservoir effective thickness, and the validity of the calculation model is verified by the measured data. Based on the analysis of logging data, geological logging, core, laboratory analysis and oil test, the paper focuses on the quantitative evaluation of logging parameters and the identification of reservoir fluid properties in various types of reservoirs. The above research results are applied to analyze the reasons for the failure of drilling in the old wells in northern Tarim Basin.
【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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