和田河气田奥陶系裂缝型碳酸盐岩储层测井解释方法研究

发布时间：2018-03-01 23:08

本文关键词： 碳酸盐岩储层测井评价裂缝评价流体识别　出处：《西南石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：目前,油气田勘探开发日趋复杂化,碳酸盐岩油气藏已成为油气勘探开发的焦点与难点之一。和田河气田奥陶系属低孔、低渗碳酸盐岩气藏,储集空间既有孔隙又有裂缝,导致储层非均质性强,测井响应规律性不强,给储层的测井分析与识别评价带来了很大困难。因此,需要利用已有资料做进一步研究,建立一套适用于研究区低孔、低渗裂缝型碳酸盐岩气藏的测井评价方法,以便更好的为气田的勘探开发服务。以地质规律为基础,结合岩心薄片鉴定及物性分析资料、试油资料对储层的基本地质特征进行了研究。利用岩心刻度成像测井,成像测井刻度常规测井的思路,分析了裂缝的成像及常规测井响应特征,尝试运用双侧向测井、自然伽马能谱测井以及裂缝指数法识别裂缝。针对储层的双孔介质特征,采用岩心刻度法分区、分岩性建立了基质孔、渗模型。在裂缝识别基础上,采用双侧向测井估算裂缝孔隙度,用裂缝样品的裂缝渗透率与裂缝孔隙度回归建立了裂缝渗透率模型。从储层岩性、物性、泥质含量以及区域构造应力四个方面出发,讨论了各种因素与裂缝发育程度的关系,并绘制了各小层裂缝分布规律图。结合试油资料在划分出有效储层的基础上,运用多种方法开展流体识别研究,确定了气、水测井识别标准。通过本论文的研究为和田河气田奥陶系储层的裂缝评价、储层参数精细计算、储层流体性质识别提供了一套切实可行的方法,为气田下一步勘探开发提供了可靠的测井解释依据。
[Abstract]:At present, the exploration and development of oil and gas fields are becoming more and more complicated, and carbonate reservoirs have become one of the focal points and difficulties in oil and gas exploration and development. The Ordovician Ordovician gas reservoirs in Hetianhe gas field belong to low porosity and low permeability carbonate gas reservoirs, and the reservoir space has both pores and fractures. As a result, the reservoir heterogeneity is strong and the logging response regularity is not strong, which brings great difficulties to the logging analysis and identification and evaluation of the reservoir. Therefore, it is necessary to use the existing data for further study and to establish a set of low porosity suitable for the study area. The logging evaluation method of low permeability fractured carbonate gas reservoir is presented in order to better serve the exploration and development of gas field. On the basis of geological law, combined with core slice identification and physical property analysis data, the basic geological characteristics of reservoir are studied by oil testing data. This paper analyzes the characteristics of fracture imaging and conventional logging response, and attempts to identify fractures by using dual lateral logging, natural gamma spectrum logging and fracture index method. According to the characteristics of dual pore media in reservoir, the core calibration method is used to divide the fractures. On the basis of fracture identification, fracture porosity is estimated by dual lateral logging, and fracture permeability model is established by regression of fracture permeability and fracture porosity of fracture sample. Based on four aspects of mud content and regional tectonic stress, the relationship between various factors and the degree of fracture development is discussed, and the distribution patterns of fractures in each layer are plotted. Based on the oil test data, the effective reservoir is divided. The identification standard of gas and water logging is determined by using many methods to identify fluid. The research in this paper provides a set of feasible methods for fracture evaluation, fine calculation of reservoir parameters and identification of reservoir fluid properties in the Ordovician reservoir of Hetianhe gas field. It provides a reliable well logging interpretation basis for the next exploration and development of the gas field.
【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;P631.81

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