沾化凹陷三合村洼陷沙三段稠油储层研究

发布时间：2018-01-06 14:30

  本文关键词：沾化凹陷三合村洼陷沙三段稠油储层研究　出处：《中国石油大学(华东)》2015年硕士论文　论文类型：学位论文

  更多相关文章： 沙三段 三合村洼陷 成岩作用 储集空间 储层评价

【摘要】：目前三合村洼陷沙三段是沾化凹陷重要的含油气区之一,对储层认识程度不够,制约了深层油气的勘探。论文以储层地质学理论为指导,综合运用多项资料,结合各项测试技术,研究后发现三合村洼陷沙三段主要发育扇三角洲和近岸水下扇沉积。研究区存在多种粒级类型的岩石,包括粉砂岩、砂岩到含砾砂岩,砾岩等。分选多为中等偏差,形状以次圆状为主,少数为次棱角-次圆状。储层的成分成熟度较低,结构成熟度中等。成岩作用类型包括压实作用、胶结作用和溶蚀作用等,成岩阶段划分为早成岩B期,中成岩A阶段。划分出三种成岩相类型:杂基充填压实成岩相、溶蚀成岩相、碳酸盐胶结成岩相,并建立了成岩相的分布模式。三合村洼陷沙三段储层储集空间划分为原生孔隙、次生孔缝和混合孔隙三大类。根据毛管压力曲线特征,划分出四类孔隙结构。对三合村洼陷沙三段储层物性研究表明发现为低孔特征,特低渗~超低渗的特征。孔隙度和渗透率垂向上变化趋势很相似,在2300m处,孔隙度、渗透率呈现较高值。研究区储层物性除了受沉积、成岩作用影响,构造作用和异常高压也对储层物性有一定的影响。研究区稠油储层的特点,运用测井响应、交会图法以及地化资料识别油层、油水层、水层,分析其纵向和平面分布特征,岩性、物性和断层控制了稠油油藏的分布。在储层分级的基础上,建立了储层评价分类标准并进行了评价,结果表明,沙三上亚段储层多属于Ⅰ~Ⅱ类储层;沙三下亚段储层多属于Ⅲ~Ⅳ类储层,少数Ⅱ类储层。垂向上,第二超覆带的砂体是最有利的储集体,此外第三超覆带发育近岸水下扇也较为有利;平面上来说,罗322东南和罗71东南等部位为储层发育的有利区带。
[Abstract]:At present, the third member of Shahecun sag is one of the important oil-bearing and gas-bearing areas in Zhanhua sag, which does not know enough about the reservoir and restricts the exploration of deep oil and gas. Combined with various test techniques, it is found that fan delta and nearshore subaqueous fan deposits are mainly developed in the third member of Shahecun sag. There are many grain-grade rocks in the study area, including siltstone, sandstone to gravel sandstone. Conglomerate and so on. The sorting is medium deviation, the shape is mainly subcircular, a few is sub-angle-subcircular. The composition maturity of reservoir is low, the structure maturity is medium. The diagenesis type includes compaction. The diagenetic stage is divided into early diagenetic stage B and middle diagenetic stage A, and three diagenetic facies are divided into three types: complex base filling compacted diagenetic facies, dissolved diagenetic facies and carbonate glue lithofacies. The distribution pattern of diagenetic facies is established. The reservoir space of the third member of Shahecun sag is divided into three categories: primary pore, secondary pore fracture and mixed pore. According to the characteristics of capillary pressure curve, the reservoir space can be divided into three types: primary pore, secondary pore fracture and mixed pore. Four types of pore structures are divided. The physical properties of the reservoir of the third member of Shahecun sag are found to be the characteristics of low porosity and ultra-low permeability. The vertical variation trend of porosity and permeability is very similar. At 2300m, porosity and permeability show higher values. The physical properties of reservoir in the study area are affected by diagenesis in addition to sedimentation. Structural action and abnormal high pressure also have certain influence on reservoir physical properties. The characteristics of heavy oil reservoir in the study area are identified by logging response, cross plot method and geochemical data to identify oil layer, oil water layer and water layer. The vertical and plane distribution characteristics, lithology, physical properties and faults control the distribution of heavy oil reservoirs. On the basis of reservoir classification, the criteria for reservoir evaluation and classification are established and evaluated, the results show that. Most of the reservoirs in the upper submember of Sha 3 belong to class 鈪，

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