本文關(guān)鍵詞：沾化凹陷三合村洼陷沙三段稠油儲層研究　出處：《中國石油大學(華東)》2015年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 沙三段 三合村洼陷 成巖作用 儲集空間 儲層評價

【摘要】：目前三合村洼陷沙三段是沾化凹陷重要的含油氣區(qū)之一,對儲層認識程度不夠,制約了深層油氣的勘探。論文以儲層地質(zhì)學理論為指導,綜合運用多項資料,結(jié)合各項測試技術(shù),研究后發(fā)現(xiàn)三合村洼陷沙三段主要發(fā)育扇三角洲和近岸水下扇沉積。研究區(qū)存在多種粒級類型的巖石,包括粉砂巖、砂巖到含礫砂巖,礫巖等。分選多為中等偏差,形狀以次圓狀為主,少數(shù)為次棱角-次圓狀。儲層的成分成熟度較低,結(jié)構(gòu)成熟度中等。成巖作用類型包括壓實作用、膠結(jié)作用和溶蝕作用等,成巖階段劃分為早成巖B期,中成巖A階段。劃分出三種成巖相類型:雜基充填壓實成巖相、溶蝕成巖相、碳酸鹽膠結(jié)成巖相,并建立了成巖相的分布模式。三合村洼陷沙三段儲層儲集空間劃分為原生孔隙、次生孔縫和混合孔隙三大類。根據(jù)毛管壓力曲線特征,劃分出四類孔隙結(jié)構(gòu)。對三合村洼陷沙三段儲層物性研究表明發(fā)現(xiàn)為低孔特征,特低滲~超低滲的特征�？紫抖群蜐B透率垂向上變化趨勢很相似,在2300m處,孔隙度、滲透率呈現(xiàn)較高值。研究區(qū)儲層物性除了受沉積、成巖作用影響,構(gòu)造作用和異常高壓也對儲層物性有一定的影響。研究區(qū)稠油儲層的特點,運用測井響應、交會圖法以及地化資料識別油層、油水層、水層,分析其縱向和平面分布特征,巖性、物性和斷層控制了稠油油藏的分布。在儲層分級的基礎(chǔ)上,建立了儲層評價分類標準并進行了評價,結(jié)果表明,沙三上亞段儲層多屬于Ⅰ~Ⅱ類儲層;沙三下亞段儲層多屬于Ⅲ~Ⅳ類儲層,少數(shù)Ⅱ類儲層。垂向上,第二超覆帶的砂體是最有利的儲集體,此外第三超覆帶發(fā)育近岸水下扇也較為有利;平面上來說,羅322東南和羅71東南等部位為儲層發(fā)育的有利區(qū)帶。
[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，

本文編號：1388275