本文選題：低—非孔隙巖石 + 走滑斷層　； 參考：《東北石油大學》2015年碩士論文

【摘要】：走滑斷裂對低—非孔隙巖石中油氣成藏具有十分重要的意義,本文通過調(diào)研大量國內(nèi)外文獻資料,界定了走滑斷層相關(guān)的專業(yè)術(shù)語,分析了低—非孔隙巖石中斷裂帶微觀變形的主要影響因素,通過對吉林省四平市石嶺鎮(zhèn)放牛溝斷裂帶和葉赫鎮(zhèn)轉(zhuǎn)山湖斷裂帶的野外觀察與測量,描述了低—非孔隙巖石中走滑斷裂帶特征,結(jié)合前人研究成果,系統(tǒng)地研究了低—非孔隙巖石中走滑斷裂帶內(nèi)部結(jié)構(gòu)的形成與演化,并以徐家圍子斷陷為靶區(qū),研究走滑斷裂帶內(nèi)部結(jié)構(gòu)對油氣成藏的影響。通過調(diào)研了解到,在不同巖性、溫度、圍壓、有效壓力和埋藏深度的條件下,低—非孔隙巖石中斷裂的變形機制主要是破裂作用、碎裂作用和碎裂流作用,在它們的共同作用下,低—非孔隙巖石中走滑斷裂帶發(fā)生脆性變形,形成的斷裂帶具有典型的“二元結(jié)構(gòu)”:斷層核和破碎帶。一般來說,埋深小于3~4km或者固結(jié)成巖后抬升至3~4km以上時,斷層核內(nèi)發(fā)育大量的裂縫,此時斷層核和破碎帶均起到輸導油氣的作用,斷層核不具有封閉性,此時主要是巖性對接封閉;埋深大于3~4km,斷層核中有內(nèi)聚力的碎裂巖滲透性比圍巖高1~2個數(shù)量級,破碎帶的滲透率比圍巖高1~6個數(shù)量級;在圍壓從100MPa增加到200MPa時,斷層核有內(nèi)聚力的碎裂巖、無內(nèi)聚力的碎裂巖、破碎帶和圍巖的滲透性均下降,但破碎帶的滲透性仍處于最高,斷層核的滲透性最低,此時斷層核起到封閉作用。本文結(jié)合徐家圍子火山巖工區(qū),分析徐中、徐東走滑斷裂帶內(nèi)部結(jié)構(gòu)對油氣的控制作用,天然氣分布以徐中走滑斷裂帶為中心,呈正弦曲線分布,分析走滑斷裂帶內(nèi)部結(jié)構(gòu)對天然氣的封閉作用,為以后研究低—非孔隙巖石中斷裂帶封閉性提供理論基礎(chǔ)。
[Abstract]:Strike-slip faults are of great significance for hydrocarbon accumulation in low-porosity rocks. This paper defines the technical terms related to strike-slip faults by investigating a large number of domestic and foreign literature. The main influencing factors of microcosmic deformation of fault zone in low-porosity rock are analyzed. The field observation and measurement of Xiangniugou fault zone in Shiling town, Jilin Province, and the Chuanshanhu fault zone in Yehe Zhen, Jilin Province, are carried out. The characteristics of strike-slip fault zone in low-porosity rock are described. The formation and evolution of internal structure of strike-slip fault zone in low-porosity non-pore rock are systematically studied, and the Xujiaweizi fault depression is taken as the target area. The effect of internal structure of strike-slip fault zone on oil and gas accumulation is studied. Through investigation, it is found that under different lithology, temperature, confining pressure, effective pressure and burial depth, the deformation mechanism of fractures in low-porosity rocks is mainly fracturing, fragmentation and fragmentation flow. Under the joint action of them, the strike-slip fault zone in low-porosity rock has brittle deformation, and the formed fault zone has a typical "binary structure": fault nucleus and fracture zone. Generally speaking, when buried depth is less than 3~4km or uplift above 3~4km after consolidation diagenesis, a large number of fractures develop in the fault nucleus. At this time, both the fault nucleus and the fracture zone play the role of transporting oil and gas, and the fault nucleus is not closed. At this time, the intersecting lithology is mainly closed, the buried depth is more than 3 ~ 4km, the permeability of clastic rock with cohesion in the fault core is 1 ~ 2 orders of magnitude higher than that of surrounding rock, the permeability of broken zone is 1 ~ 6 orders of magnitude higher than that of surrounding rock, and when the confining pressure increases from 100 MPA to 200 MPA, the permeability of fractured rock is 1 ~ 6 orders of magnitude higher than that of surrounding rock. The permeability of fractured zone and surrounding rock is decreased, but the permeability of fracture zone is still the highest and the permeability of fault nucleus is the lowest. Based on the Xujiaweizi volcanic rock area, this paper analyzes the controlling effect of the internal structure of the Xuzhong and Xudong strike-slip fault zone on oil and gas. The distribution of natural gas is centered on the Xuzhong strike-slip fault zone with a sinusoidal distribution. The internal structure of the strike-slip fault zone is analyzed to seal the natural gas, which provides a theoretical basis for the further study of the sealing of the fault zone in the low-porosity rock.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13

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本文編號：2050238