姬塬油田黄219区长9油藏有效储层测井识别方法研究

发布时间：2018-03-23 19:46

本文选题：姬塬油田　切入点：储层特征　出处：《西安石油大学》2015年硕士论文

【摘要】：姬塬地区位于宁夏盐池县境内,东临马坊油田,西抵红井子油田。主力含油层为三叠系延长组和侏罗系延安组。姬塬地区是低渗透砂岩油藏的典型代表,储层物性差、非均质性强、孔隙结构和油水关系复杂。储层成岩作用、孔隙结构的差异严重影响了利用测井资料准确识别和评价油层的能力。本文以鄂尔多斯盆地姬塬地区延长组长9油层组为研究对象,从低渗透复杂孔隙结构、储层岩电特征、测井解释模型研究、低渗储层测井快速识别等方面进行研究。姬塬油田H219区长9油层组的沉积体系属于三角洲平原沉积环境,主要微相类型为分流河道、分流间湾、河道侧翼;岩石类型以岩屑长石砂岩、长石砂岩为主,长石和石英含量较高,碎屑含量低,且以变质岩屑为主;长9储层平均孔隙度为12.92%,平均渗透率为1.91×10-3μm2,储层物性较差,表现为低孔、低渗的特征。姬塬油田H219区长9储层孔隙类型以粒间孔为主,其次发育长石溶孔,其他孔隙类型相对较少。孔隙结构参数排驱压力平均为0.23Mpa,中值压力为4.36MPa,中值喉道半径为0.17μm,储层微小孔隙发育,孔隙结构一般。控制储层发育的主要因素是成岩作用,研究区成岩作用强烈,类型复杂,压实作用对原生孔隙起着主要的破坏作用,同时发育胶结作用;溶解溶蚀作用对砂岩次生孔隙形成起主要作用,对改善本区储层物性起着非常重要的作用。H219区储层非均质性研究主要从层内、层间以及平面三个角度开展储层非均质性分析。研究区长9储层变异系数为中等,突进系数为弱,极差系数为中等。整个长9连续叠置状产出的中厚层砂岩组合,层间非均质性中等至较弱。储层参数精细解释模型和储层物性下限的基础上,建立了储层参数限定值法、侵入特征分析法、声波时差与电阻率重叠图法、岩性—电性交会图法、微分分析法和横向对比法等多种油水层定量和定性综合判识技术,以提高解释符合率。
[Abstract]:The Jiyuan area is located in Yanchi County, Ningxia, adjacent to Mafang Oilfield in the east and Hongjingzi Oilfield in the west. The main oil bearing layers are the Yanchang formation of Triassic and the Yanan formation of Jurassic. Jiyuan area is a typical low permeability sandstone reservoir with poor physical properties. Strong heterogeneity, complex pore structure and oil-water relationship. Reservoir diagenesis, The difference of pore structure has seriously affected the ability to accurately identify and evaluate oil layers using logging data. This paper takes Yanchang formation 9 in Jiyuan area, Ordos Basin, as the research object, from the complex pore structure of low permeability and the petro-electric characteristics of reservoir. The sedimentary system of Chang 9 formation in H219 area of Jiyuan Oilfield belongs to delta plain sedimentary environment, and the main microfacies types are distributary channel, interdistributary bay and flanking channel. The main rock types are lithic feldspathic sandstone, feldspathic sandstone, high feldspar and quartz content, low clastic content, and metamorphic rock debris, the average porosity and permeability of Chang9 reservoir are 12.92 and 1.91 脳 10 ~ (-3) 渭 m ~ (2) respectively. The pore types of Chang 9 reservoir in area H219 of Jiyuan Oilfield are mainly intergranular pores, followed by feldspar dissolution pores. Other pore types are relatively few. The average displacement pressure of pore structure parameter is 0.23 Mpa. the median pressure is 4.36 MPA, the median throat radius is 0.17 渭 m. In the study area, the diagenesis is strong, the type is complex, the compaction plays a major role in the destruction of primary pores, and the cementation is also developed, while dissolution and dissolution play a major role in the formation of secondary pores in sandstone. The study of reservoir heterogeneity in H219 area is mainly carried out from three angles of layer, interlayer and plane. The coefficient of variation of Chang 9 reservoir is medium, the coefficient of penetration is weak, and the reservoir heterogeneity is very important to improve the reservoir physical properties in this area. The range coefficient is medium. The medium thickness sandstone assemblage of the whole Chang 9 continuous superposition, the medium to weak heterogeneity between layers, the fine interpretation model of reservoir parameters and the lower limit of reservoir physical properties, are established, and the limited value method of reservoir parameters is established. In order to improve the interpretation coincidence rate of oil and water layers the intrusion characteristic analysis method the overlap map method of acoustic moveout and resistivity the litho-electric intercourse map method the differential analysis method and the lateral contrast method are used to identify the oil and water layers quantitatively and qualitatively.
【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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