本文關鍵詞：致密砂巖毛管壓力和電性參數(shù)及可動流體飽和度研究　出處：《西南石油大學》2017年碩士論文　論文類型：學位論文

  更多相關文章： 致密儲層 微觀孔隙結(jié)構(gòu)特征 毛管壓力 巖石電性 可動流體飽和度

【摘要】：致密砂巖儲層巖石微觀孔隙結(jié)構(gòu)特征復雜,如何更好地理解儲層巖石的毛管壓力特征、電性特征和儲層的可動流體飽和度,一直受到人們的關注。本文有針對性地設計并完成了 H和G區(qū)塊儲層巖石的鑄體薄片鑒定、掃描電鏡分析、半滲透隔板法毛管壓力電性聯(lián)測實驗分析、核磁共振實驗分析等,重點研究了儲層巖石微觀孔隙結(jié)構(gòu)特征、巖石電性的影響因素、儲層飽和度模型、可動流體飽和度與孔隙結(jié)構(gòu)綜合指數(shù)之間的關系。論文具體開展的工作如下:(1)完成研究區(qū)塊12 塊巖芯的鑄體薄片和掃描電鏡分析,研究了儲層的微觀孔隙結(jié)構(gòu)特征;(2)根據(jù)半滲透隔板法毛管壓力電性聯(lián)測實驗結(jié)果,建立毛管壓力與含水飽和度的關系,并驗證了實驗的有效性,同時研究了毛管壓力曲線特征;(3)基于阿爾奇公式,利用實驗數(shù)據(jù)建立地層因素與孔隙度、電阻增大系數(shù)與飽和度之間的關系,同時結(jié)合鑄體薄片和掃描電鏡結(jié)果研究了巖石顆粒大小、孔隙結(jié)構(gòu)、膠結(jié)物對膠結(jié)指數(shù)m的影響和孔隙半徑、孔隙連通性對巖石電性的影響;(4)根據(jù)實驗得出巖石電性數(shù)據(jù),建立兩個區(qū)塊的傳統(tǒng)飽和度模型和LBT飽和度模型,并以H區(qū)塊為例對兩種飽和度模型進行比較;(5)毛管壓力與電阻增大系數(shù)滿足乘冪關系,基于分形理論,建立了它們之間的關系模型,并分析了模型的冪指數(shù)值與滲透率之間的關系;(6)利用核磁共振T_2譜曲線,分析飽和譜的形態(tài)特征和驅(qū)替前后T_2譜形態(tài)變化特征,研究了截斷法和面積法兩種可動流體飽和度,并以稱重法為基礎進行準確性比較;同時研究了稱重法、截斷法和面積法可動流體飽和度與孔隙結(jié)構(gòu)綜合指數(shù)之間的關系。通過上述實驗及分析,研究了 H和G區(qū)塊的微觀孔隙結(jié)構(gòu)特征、毛管壓力曲線特征、電性特征以及可動流體飽和度特征,為儲層綜合評價和開發(fā)奠定了基礎。
[Abstract]:The characteristics of micro pore structure of tight sandstone reservoir rock complex, how to better understand the characteristics of capillary pressure of reservoir rocks, movable fluid saturation, electrical characteristics and reservoir, has attracted people's attention. This paper is designed and the H and G reservoir rock thin sections completed, scanning electron microscope analysis, analysis of partition method of capillary pressure electrical measurement experimental semi permeable, NMR analysis, focusing on the reservoir microscopic pore structure characteristics, factors affecting the electrical properties of rock, reservoir saturation model, the relationship between movable fluid saturation and pore structure index. The main work is as follows: (1) analysis of 12 core samples from the study area of casting thin sections and scanning electron microscope study of microscopic reservoir pore structure characteristics; (2) according to the semi permeable diaphragm method of capillary pressure electrical contact test results, Relationship between capillary pressure and water saturation, and verifies the validity of the experiment, and study the characteristics of capillary pressure curve; (3) based on the Archie equation, using experimental data to establish the relationship between formation factor and porosity, resistivity and saturation coefficient, combined with the research results of the rock grain size, thin section and scanning electron microscope cast pore structure, cementation effect on the cementation index m and pore radius, pore connectivity effects on electrical properties of rock; (4) based on the experimental results of rock electric data, traditional saturation model and LBT saturation model to build two block, and H block as example and comparison of two kinds of saturation model; (5) the capillary pressure and resistance coefficient satisfy the power relation, based on the fractal theory, establish the relationship model between them, and analyzes the relationship between the numerical model of power exponent and permeability; (6) The use of nuclear magnetic resonance T_2 spectrum curve, morphological analysis of saturated spectrum and displacement T_2 spectra before and after morphological changes, study the truncation method and area method of two kinds of movable fluid saturation, and the weighing method as the basis for comparing the accuracy of weighing method; also, truncation method and area method and the relationship between movable fluid saturation the pore structure index. Through the experiment and analysis, the research of micro pore structure of H and G block, the characteristics of capillary pressure curve, the electrical characteristic and movable fluid saturation characteristics, laid the foundation for reservoir evaluation and development.

【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE311

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