本文選題：太古界儲層 + 裂縫儲層　； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：本文對東營凹陷太古界的主要儲集巖類及組合、儲集空間類型、物性和孔隙結(jié)構(gòu)等儲層特征進(jìn)行定性和定量研究,并開展儲集巖儲集空間成因機(jī)制研究,明確儲層特征與巖性、巖漿侵入、混合巖化作用、構(gòu)造斷裂活動和物理風(fēng)化作用等之間的關(guān)系,且進(jìn)行儲集空間形成期次的劃分,確定影響潛山儲層形成與分布的主要控制因素。 首先,本區(qū)古潛山儲層以孔洞復(fù)合型和裂縫孔隙型儲層為主,所劃分的四類儲層中,I類儲層為優(yōu)質(zhì)儲層,其孔隙度大于10%,滲透率大于10×10-3μm2。從儲集巖類型上看,研究區(qū)儲集巖主要為花崗巖類(約占60.1%)、閃長巖類(16.2%)。從儲集空間類型及特征上看,研究區(qū)層段儲集空間以各類裂縫為主,主要為高角度構(gòu)造縫,大多被充填,寬度0.5-2mmm不等,縫間距多小于2cm。從儲層物性上看,儲層孔隙度大多數(shù)小于10%,滲透率總體小于10×10-3μm2,儲集巖總體屬于低孔低滲巖層。 其次,巖漿作用、構(gòu)造作用和風(fēng)化作用是本區(qū)儲層形成的主要原因。形成于25億年前的太古界結(jié)晶基底和在4.5億年前發(fā)生的一次巖漿侵入構(gòu)成了現(xiàn)今東營凹陷太古界基巖儲層的花崗巖類基底。東營凹陷北部潛山帶的幾條近東西向斷層自中生代末至第四紀(jì)長期處于張裂活動,與此同時,研究區(qū)太古界頂面長期遭受風(fēng)化剝蝕,形成了各類裂縫與孔隙,大大增加了儲層的儲集性能。 此外,研究區(qū)太古代巖石經(jīng)歷了漫長的地質(zhì)演化。太古界儲層巖石為新太古代中晚期巖漿侵入包裹原變質(zhì)巖,后又經(jīng)過至少2期巖漿侵入,同時接受區(qū)域變質(zhì)、構(gòu)造破碎、風(fēng)化淋濾、湖水溶蝕等作用的改造,形成了大量以各類裂縫為主的次生儲集空間。 最后,本文根據(jù)成因和控制因素的分析,以巖性為根本影響因素,構(gòu)造破碎為最主要控制因素,結(jié)合巖漿侵入、物理風(fēng)化、大氣淡水淋濾、深層溶解作用等次要控制因素,總結(jié)出儲層的演化模式。
[Abstract]:In this paper, the main reservoir types and assemblages, reservoir space types, physical properties and pore structure of the Archaean in Dongying depression are studied qualitatively and quantitatively, and the formation mechanism of reservoir space is studied to make clear the reservoir characteristics and lithology. The relationship between magmatic intrusion, migmatization, tectonic fault activity and physical weathering, and the division of reservoir space formation stages to determine the main controlling factors affecting the formation and distribution of buried hill reservoir. First of all, the reservoir of buried hill in this area is mainly composed of porosity and fracture porosity. Among the four types of reservoirs, the type I reservoir is of high quality, its porosity is greater than 10 脳 10 ~ (-3) 渭 m ~ (2) and its permeability is more than 10 脳 10 ~ (-3) 渭 m ~ (2). The reservoir rocks in the study area are mainly granite (60.1%) and diorite (16.2g). In terms of the types and characteristics of reservoir space, the reservoir space of the study area is mainly composed of various fractures, mainly high angle structural fractures, mostly filled with 0.5-2mmm of different width and less than 2 cm. In terms of reservoir physical properties, most of the reservoir porosity is less than 10%, the permeability is less than 10 脳 10 -3 渭 m 2, and the reservoir rock belongs to low porosity and low permeability rock. Secondly, magmatism, tectonism and weathering are the main reasons for reservoir formation. The Archean crystalline basement formed 2.5 billion years ago and a magmatic intrusion occurred 450 million years ago formed the granitic basement of the Archean bedrock reservoir in Dongying depression. Several near-east-west faults in the buried hill belt in the north of Dongying Sag have been in the long period of tension from the late Mesozoic to the Quaternary. At the same time, the top of the Archean in the study area has been weathered and denudated for a long time, resulting in various fractures and pores. The reservoir performance is greatly improved. In addition, Archean rocks have undergone a long geological evolution in the study area. The Archean reservoir rocks were formed by magmatic intrusions in the late NeoArchean period surrounding the original metamorphic rocks, and then underwent at least two periods of magmatic intrusion, and at the same time underwent the transformation of regional metamorphism, structural fragmentation, weathering and leaching, and lake water dissolution, etc. A large number of secondary reservoir spaces with various fractures are formed. Finally, according to the analysis of genesis and control factors, the paper takes lithology as the basic influencing factor, structural fragmentation as the most important controlling factor, combined with the secondary control factors such as magmatic intrusion, physical weathering, atmospheric fresh water leaching, deep dissolution and so on. The evolution model of reservoir is summarized.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

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