直罗油田长8储层测井评价方法研究

发布时间：2018-05-13 00:05

本文选题：地层对比 + 油藏特征　；参考：《西安石油大学》2015年硕士论文

【摘要】：直罗油田位于陕西省延安市富县境内,构造单元属陕北斜坡,面积约2548平方公里。在鄂尔多斯盆地大的沉积背景之下,分析研究区长8期处于富县三角洲沉积体系,属于三角洲前缘亚相。本文首先依照层序地层划分的原则,以岩心、测井曲线为基础,对研究区长S油层组进行小层划分和对比,将长S油层划分为长81和长82两个小层。通过对比长8油层组砂体剖面与油藏剖面分布特征,得知长时期油层连续性较好且油层厚度较大,河道砂体较为发育的地方,油层相应发育也较好。然后,基于关键井岩心观察和分析测试结果、试油结果等,分析关键井的“四性”关系特点。根据铸体薄片、扫描电镜、高压压汞等实验资料分析储层的孔隙结构特征,并应用岩石物理分类方法对储层进行分类,描述各类储层的测并响应特征。综合以上基础研究,对研究区长8储层测井资料展开二次解释,以地质特征为约束,建立各区的长8储层参数解释模型,确定解释参数,并分区建立油水层识别图版。最后,将新的解释模型应用于新井解释、老井复查,并与原解释结论、试油结论进行分析对比,发现测井解释符合率明显提高。
[Abstract]:Zhiluo Oilfield is located in Fuxian County, Yan'an City, Shaanxi Province. The tectonic unit belongs to the slope of Northern Shaanxi Province, covering an area of about 2548 square kilometers. In the large sedimentary background of Ordos Basin, Chang8 is located in Fuxian delta sedimentary system and belongs to delta front subfacies. In this paper, according to the principle of sequence stratigraphic division, based on core and log curves, the Changs formation is divided into Chang81 and Chang82 layers. By comparing the distribution characteristics of sand body profile and reservoir profile of Chang 8 oil formation, it is known that the continuity of oil layer is good, the thickness of oil layer is large, and where the channel sand body is relatively developed, the reservoir development is relatively good. Then, based on the core observation and test results of key wells, the characteristics of "four properties" of key wells are analyzed. The pore structure characteristics of reservoirs are analyzed according to the experimental data of casting thin slice, scanning electron microscope and high pressure mercury pressure. The reservoir is classified by using the method of rock physical classification, and the characteristics of measurement and response of various reservoirs are described. Based on the above basic research, the logging data of Chang8 reservoir in the study area are interpreted twice, and the interpretation model of Chang 8 reservoir parameters in each district is established with the constraints of geological characteristics, and the interpretation parameters are determined, and the oil-water layer identification chart is established. Finally, the new interpretation model is applied to the new well interpretation, the old well review, and the analysis and contrast with the original interpretation conclusion and the oil test conclusion, it is found that the log interpretation coincidence rate is obviously improved.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.81

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