大庆葡萄花油田扶余致密油层测井评价方法研究

发布时间：2018-05-07 12:05

本文选题：松辽盆地 + 致密油　；参考：《东北石油大学》2017年硕士论文

【摘要】：松辽盆地北部葡萄花油田扶余油层致密油储层发育,资源潜力大,分布范围广,是大庆油田4000万吨持续稳产的重要组成部分,因此,开展致密油评价是非常必要的。本次研究的目标区大庆葡萄花油田扶余油层属于低孔、特低渗储层,储层条件较差,非均质性强,孔隙结构复杂。针对上述情况,利用研究区的取心和岩心分析资料,开展了该区块致密油储层的岩性、物性、矿物成分等参数的特征分析,基于研究区块岩心资料和测井资料,建立了有机碳含量、镜质体反射率、孔隙度、渗透率、含水饱和度、泥质含量、脆性指数等测井评价参数模型。利用常规物性资料、核磁共振测井资料以及压汞资料研究储层孔隙结构特征,对12口井67个试油层进行了分析研究,利用建立的综合性致密砂岩饱和度模型计算了12口井的饱和度,绘制了67个试油层的含油饱和度与孔隙度的交会图,图版符合率为88.1%,形成了致密油层分类评价方法和标准。通过对致密油层流体识别影响主控因素分析,建立了不同矿化度条件下电阻率校正公式,优选敏感参数,编制了流体识别图版,提高了油水层识别图版解释精度。以储层采油强度为标准,以致密油储层分类为结果,应用“七性”参数构建了宏观品质RQ1、微观孔隙结构品质RQ2以及工程品质CQ三个品质因子,同时基于SPSS统计分析软件,采用Fisher判别分析,建立三类储层“甜点”的判别表达式和三维致密油储层“甜点”分类图版,形成了以储层综合品质评价为核心的“甜点”分类方法。研究成果及时应用生产,论文研究成果已经应用到松辽地区北部42口致密油探井测井解释中,储层孔隙度计算平均绝对误差0.98%,直井油水层解释符合率为95.7%,见到较好的应用效果,直井解释符合率提高为“甜点”优选、地质研究提供了技术支撑,特别是致密油直井“七性”评价成果,已成为直井射孔位置选取,压裂段确定等压裂施工设计的重要依据。为致密油层勘探开发提供技术支持,具有明显的经济效益和社会效益。
[Abstract]:The dense oil reservoir of Fuyu reservoir in the north of Songliao Basin is developed with large potential of resources and wide range of distribution. It is an important part of 40 million tons of continuous and stable production in Daqing Oilfield. Therefore, it is very necessary to carry out the evaluation of dense oil. Fuyu reservoir in Daqing Gaohua Oilfield is a low porosity and low permeability reservoir with poor reservoir condition strong heterogeneity and complex pore structure. In view of the above situation, using the coring and core analysis data of the study area, the characteristic analysis of the lithology, physical property, mineral composition and other parameters of the dense oil reservoir in this block is carried out, which is based on the core data and logging data of the research block. The log evaluation model of organic carbon content, vitrinite reflectance, porosity, permeability, water saturation, mud content and brittleness index was established. Based on conventional physical property data, nuclear magnetic resonance (NMR) logging data and mercury injection data, the pore structure characteristics of the reservoir are studied, and 67 oil test zones in 12 wells are analyzed and studied. The saturation of 12 wells was calculated by using the comprehensive tight sandstone saturation model, and the cross plot of oil saturation and porosity of 67 oil test layers was plotted. The coincidence rate of the pattern was 88.1. the classification and evaluation method and standard of tight reservoir were formed. Based on the analysis of the main control factors of fluid identification in dense reservoir, the formula of resistivity correction under different salinity is established, the sensitive parameters are selected, the fluid identification chart is compiled, and the interpretation accuracy of oil-water layer identification plate is improved. Taking the oil recovery intensity as the standard and the classification of tight oil reservoir as the result, three quality factors, including macroscopic quality RQ1, microscopic pore structure quality RQ2 and engineering quality CQ, are constructed by applying the "seven properties" parameters. At the same time, three quality factors are constructed based on SPSS statistical analysis software. By using Fisher discriminant analysis, the discriminant expression of "dessert" of three types of reservoirs and the classification chart of "dessert" of three dimensional tight oil reservoir were established, and the classification method of "dessert" with the core of reservoir comprehensive quality evaluation was formed. The research results have been applied to the log interpretation of 42 tight oil exploration wells in the north of Songliao area. The average absolute error of reservoir porosity calculation is 0.98, and the interpretation coincidence rate of oil and water layers in straight wells is 95.7. The improvement of the coincidence rate of interpretation of vertical wells provides technical support for the optimum selection of "dessert" and geological research, especially the evaluation results of "seven properties" of dense oil vertical wells. It has become an important basis for the design of fracturing operation such as the selection of perforation location and the determination of fracturing section. It provides technical support for exploration and development of tight reservoir and has obvious economic and social benefits.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13;P631.81

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