本文選題：三塘湖盆地 + 西山窯組��； 參考：《西北大學》2017年碩士論文

【摘要】：三塘湖盆地牛圈湖地區(qū)西山窯組儲層微觀孔隙結構復雜,非均質性強,本文利用鑄體薄片、掃描電鏡、X衍射、高壓壓汞實驗、恒速壓汞實驗、核磁共振實驗等多種測試手段,從成巖相角度出發(fā),分析不同成巖相儲層的巖石學特征、微觀孔隙結構、可動流體賦存特征及生產(chǎn)動態(tài)特征。取得以下主要認識:(1)研究區(qū)X2段巖性主要為細-中粒長石巖屑砂巖,儲層物性整體較差,孔隙度平均為12.4%,滲透率平均為3.24×10-3μm2,整體而言,油層在成分、結構成熟度、填隙物含量以及物性方面都最好,其次為差油層,油干層最差。(2)研究區(qū)X2段成巖作用類型多樣,成巖階段為中成巖A期。依據(jù)膠結類型、孔隙類型以及面孔率,研究區(qū)西山窯組可劃分為6個成巖相類型,優(yōu)勢成巖相主要為:高嶺石+伊利石膠結一粒間孔+長石溶孔相、高嶺石+綠泥石膠結一粒間孔+凝灰質溶孔相、高嶺石+伊利石膠結一粒間孔+凝灰質溶孔相。(3)不同成巖相儲層微觀孔隙結構存在明顯差異,特別體現(xiàn)在喉道上:高嶺石+伊利石膠結一粒間孔+長石溶孔相主流喉道半徑最大(平均為6.68μm),配位數(shù)最高;高嶺石+碳酸鹽巖膠結一長石溶孔+凝灰質溶孔相主流喉道半徑最小(平均為0.63μm)且配位數(shù)最低。(4)不同成巖相儲層可動流體飽和度不同,核磁共振實驗結果表明:高嶺石+伊利石膠結一粒間孔+長石溶孔相孔喉連通性好,可動流體飽和度最高(平均50.96%);高嶺石+碳酸鹽巖膠結—長石溶孔+凝灰質溶孔相孔喉連通性差,可動流體飽和度最低(平均36.83%)。(5)物性是影響不同成巖相可動流體飽和度的重要因素之一,其中滲透率與可動流體飽和度相關性(R2為0.5314)相比孔隙度(R2為0.4043)較大。微觀孔喉結構是儲層物性的重要控制因素,而主流喉道半徑、有效孔喉體積和孔喉半徑比的差異是導致微觀孔隙結構內部差異的決定性因素。(6)不同成巖相儲層生產(chǎn)動態(tài)特征存在差異。其中高嶺石+綠泥石膠結—粒間孔+凝灰質溶孔相日產(chǎn)油和日產(chǎn)液最高,含水率上升較快,穩(wěn)產(chǎn)周期較長,其次為高嶺石+伊利石膠結—粒間孔+長石溶孔相,高嶺石+伊利石膠結—粒間孔+凝灰質溶孔相最差。
[Abstract]:The microcosmic pore structure of Xishanyao formation reservoir in Niuquanhu area of Santanghu Basin is complex and heterogeneous. In this paper, various testing methods, such as casting thin slice, scanning electron microscope X diffraction, high pressure mercury injection experiment, constant speed mercury pressure experiment, nuclear magnetic resonance test, etc, are used. From the diagenetic facies point of view, the petrological characteristics, micro-pore structure, movable fluid occurrence and production dynamic characteristics of different diagenetic facies reservoirs are analyzed. The main understanding is as follows: (1) the lithology of X2 member in the study area is mainly fine to medium grained feldspathic sandstone, the overall physical property of the reservoir is poor, the average porosity is 12.4 and the average permeability is 3.24 脳 10 ~ (-3) 渭 m ~ (2). On the whole, the reservoir is in composition and structural maturity. The content of interstitial matter and physical properties are the best, followed by the poor reservoir and the worst reservoir. The diagenesis types of X2 member in the study area are various, and the diagenetic stage is middle diagenetic stage A. According to the cementation type, pore type and porosity, the Xishanyao formation in the study area can be divided into 6 diagenetic facies. The dominant diagenetic facies are kaolinite Illite cementation and intergranular feldspar dissolution pore facies. Kaolinite chlorite cementation one intergranular pore tuff dissolved pore facies, kaolinite Illite cementation and intergranular pore tuff dissolution pore facies. 3) the micropore structure of different diagenetic facies reservoirs is obviously different from that of kaolinite chlorite cementation and kaolinite Illite cementation. Especially in the throat: kaolinite Illite cemented the intergranular feldspar dissolution pore in the mainstream throat radius is the largest (mean 6.68 渭 m ~ (-1), coordination number is the highest; Kaolinite carbonate rock cementation-feldspar dissolved pore tuff has the smallest main throat radius (average 0.63 渭 m) and the lowest coordination number. The results of nuclear magnetic resonance (NMR) showed that kaolinite and Illite cemented one intergranular feldspar with good pore throat connectivity. The saturation of movable fluid is the highest (mean 50.96), the connectivity of pore throat of kaolinite carbonate rock cementation and feldspar dissolved pore tuff is poor, The lowest movable fluid saturation (average 36.83%) is one of the important factors affecting the movable fluid saturation of different diagenetic facies, and the correlation between permeability and movable fluid saturation is 0.5314, which is larger than that of porosity (R ~ 2 = 0.4043). Microcosmic pore throat structure is an important controlling factor of reservoir physical properties, and the mainstream throat radius, The difference of effective pore throat volume and pore throat radius ratio is the decisive factor leading to the internal difference of microscopic pore structure. Among them, kaolinite chlorite cemented with intergranular pore tuffaceous dissolved pore phase produces the highest daily oil and liquid, the water content rises rapidly, and the stable production period is longer, followed by kaolinite Illite cementation and intergranular pore feldspar dissolution pore phase. Kaolinite Illite cemented-intergranular pore tuff dissolved pore phase is the worst.
【學位授予單位】：西北大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE311
，

本文編號：1950949