辽河油田双南地区沙三段致密砂岩储层测井评价

发布时间：2018-07-03 16:53

本文选题：辽河油田 + 致密砂岩　；参考：《东北石油大学》2017年硕士论文

【摘要】：随着石油勘探开发程度的逐渐加深,致密砂岩气藏的经济价值逐渐被人们所认识,其勘探开发已经成为国内外石油工业的研究热点和前沿问题。但复杂的成因以及裂缝的发育等,使得致密砂岩储层具有岩性致密、低孔隙度、低渗透率、储层非均质性强和气水关系复杂等特点,这给致密砂岩储层测井解释评价研究增加了难度。本文首先在分析了取心、试油投产等第一手资料的基础上,开展油气层岩性、含油性、物性以及电性研究,建立油气层测井定性识别及定量识别标准,并通过通过沙一二和沙三深层致密砂岩储层测井评价的比较,找出二者在测井评价上区别及难点,之后在岩心分析的基础上,进行了双侧向测井曲线以及气层时差的校正,进而建立了包括泥质含量、孔隙度、渗透率、粒度中值及饱和度等储层参数在内的测井解释模型,并对模型做出了校正。通过四性研究发现,沙三段与沙一二相比,在沉积、岩性、含油性、物性及电性特征上均存在较大的差别,加上储层特征具有鲜明的独特性,致使应用常规的测井评价方法来评价目的层难度较大,甚至无法进行,为此,在本文中引进了储层品质指数及裂缝孔隙度,并结合阵列感应、核磁和阵列声波等测井新技术来对沙三致密储层的储集性能、含油气情况等进行评价。最终,结合工区油藏综合地质特征研究以及本问所建立建立的油气层识别标准和储层参数解释模型的基础上,开展测井二次精细处理解释,研究工区内油气水分布规律。应用本文所提出的方法,首先对研究区重点井进行了二次评价,对9口井解释结论重新进行了修改,修改结论共71层,之后通过对区域重点井的分析及井间地层对比,发现坡折带不利于寻找致密气藏,洼陷区致密砂岩气在沙三中部普遍存在,在沙三上部构造有利部位存在,在沙三下部少见。洼陷区的沙三中下部储层由于储层处于沙一、二段、沙三段和沙四段成熟生油岩的包围之中,成藏条件优越,但是沙三中下部储层储集性能极差,先天储集条件不足,因此含气丰度不高,产量很低。
[Abstract]:With the deepening of petroleum exploration and development, the economic value of tight sandstone gas reservoir has been gradually recognized, and its exploration and development has become a hot spot and a frontier issue in petroleum industry at home and abroad. However, due to the complex genesis and the development of fractures, the tight sandstone reservoir has the characteristics of tight lithology, low porosity, low permeability, strong heterogeneity of reservoir and complex relationship between gas and water. This makes it more difficult to study the log interpretation and evaluation of tight sandstone reservoir. In this paper, based on the analysis of the first data of coring and production testing, the lithology, oil-bearing, physical and electrical properties of oil and gas reservoir are studied, and the criteria for qualitative identification and quantitative identification of oil and gas reservoir logging are established. Based on the comparison of logging evaluation between sand 1 2 and 3 deep tight sandstone reservoir, the differences and difficulties in logging evaluation between them are found out. Based on core analysis, dual lateral log curves and gas interval time difference are corrected. A logging interpretation model including shale content, porosity, permeability, grain size median and saturation is established, and the model is corrected. Through the study of four properties, it is found that there are great differences in sedimentary, lithologic, oil-bearing, physical and electrical characteristics of the third member of the formation, compared with the first and second member of the formation, and the distinct unique characteristics of the reservoir. As a result, it is very difficult to evaluate the target layer by using the conventional logging evaluation method. Therefore, the reservoir quality index and fracture porosity are introduced in this paper, and combined with array induction, the reservoir quality index and fracture porosity are introduced in this paper. New logging techniques, such as nuclear magnetic field and array acoustic wave, are used to evaluate the reservoir performance, oil and gas content of the sand 3 tight reservoir. Finally, based on the study of the comprehensive geological characteristics of the reservoir in the working area and the oil and gas reservoir identification standard and the reservoir parameter interpretation model established by this paper, the secondary fine processing interpretation of logging is carried out to study the distribution of oil, gas and water in the working area. Using the method proposed in this paper, the second evaluation of the key wells in the study area is first carried out, and the interpretation conclusions of 9 wells are revised again, with a total of 71 layers. Then, through the analysis of the regional key wells and the cross-well formation correlation, It is found that the slope break zone is not conducive to finding the tight gas reservoirs. The tight sandstone gas exists generally in the middle of Sha 3 and in the favorable part of the upper structure in the sag area, but it is rare in the lower part of the third part of the sand. The reservoirs in the middle and lower part of Sha 3 in the sag area are surrounded by the mature source rocks of the first, second, third and fourth member of Shahejie formation, so the reservoir forming conditions are superior, but the reservoir performance of the middle and lower part of the reservoir is extremely poor, and the congenital reservoir conditions are insufficient. Therefore, the gas abundance is not high, the output is very low.
【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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