本文選題：米倉山構造及前緣　切入點：深層-超深層　出處：《成都理工大學》2017年碩士論文　論文類型：學位論文

【摘要】：本文以川北米倉山構造及前緣作為研究主體,通過對比川中高磨地區(qū)、川西南威遠地區(qū)震旦系燈影組儲層,綜合探討燈影組儲層巖石學特征、沉積相、儲集空間類型及發(fā)育情況、物性特征、成巖作用,并分析四川疊合盆地深層-超深層燈影組優(yōu)質儲層的形成與保存機理,結果表明:四川盆地北緣燈影組劃分為開闊臺地相和局限臺地相,以局限臺地相為主,開闊臺地相見于福成剖面燈三段,為近濱沉積的一套碎屑巖,局限臺地內發(fā)育藻云坪、藻砂屑灘、顆粒灘、鮞粒灘和泥云坪。自陡山沱組開始到燈三段結束,大體經歷了近濱→潮間→潮下高能→潮間→近濱的環(huán)境變化,海平面經歷了一次次級升降旋回;而燈四段可見多個潮下-潮間-潮上沉積旋回,以潮下-潮間沉積為主。川北米倉山構造及前緣地區(qū)震旦系燈影組巖石類型主要以復雜多樣的微生物巖為主,其主要有葡萄石、核形石、泡沫綿層石、包殼顆粒巖、疊層石、凝塊石、球粒巖、枝狀石和紋層石,以凝塊石、葡萄石和紋層石為主,其次為泡沫棉層石和核形石。其中燈四段以發(fā)育泥云坪為主的較致密的泥晶白云巖,局部(主要為頂部)發(fā)育微生物碳酸鹽巖。米倉山及前緣燈影組微生物碳酸鹽巖儲集層主要分布在燈二段和燈四段,其儲集空間類型總結起來共有2個大類和4個小類。其中2大類為:縫洞型儲集空間類型和孔隙型儲集空間類型,4個小類為:(1)巖溶孔洞(包括溶洞、溶孔);(2)晶間(溶)孔;(3)溶蝕裂縫(包括溶縫和裂縫);(4)粒間(溶)孔(包括砂屑、凝塊顆粒間溶孔)。不同層段、不同地區(qū)的主要儲集空間組合類型亦有所不同。馬深1井燈二段孔隙度1.5-4.6%,平均3.3%,滲透率(0.011-0.684)×10-3μm2,平均0.248×10-3μm2;福成剖面燈四段孔隙度0.36-2.76%,平均1.27%,滲透率(0.03-0.164)×10-3μm2,平均0.192×10-3μm2;天星1井燈二段孔隙度為1.71%-4.76%,平均值為3.065%,滲透率為(0.0016-0.0129)×10-3μm2,主要分布于(0.001-0.01)×10-3μm2,平均值為0.0055×10-3μm2。利用馬深1井燈影組成巖演化情況為研究主體,歸納研究區(qū)內成巖演化序列為:云泥沉積物→顆粒硬化/微生物泥晶化作用→沉積期巖溶作用/白云石化作用→膠結作用/黃鐵礦化作用/輕重結晶作用→(構造抬升)-表生巖溶/淡水硅化作用/機械破裂作用→壓實、壓溶作用/重結晶作用→埋藏期溶蝕(熱液作用)/充填作用→壓實作用→(米倉山隆升燈影組剝蝕)-有機酸溶蝕硅化/巖溶作用/破裂作用→充填作用。川北米倉山地區(qū)-通南巴地區(qū)震旦系燈影組優(yōu)質儲層的形成和保存機理主要有:(1)沉積期的微生物巖結構以及準同生期的巖溶作用構成了優(yōu)質儲層發(fā)育的基礎;(2)桐灣期的表生巖溶作用進一步的擴寬了沉積期巖溶形成的孔縫;(3)優(yōu)質的縫洞型儲層為烴類充注提供了有利通道;(4)燈影組剝蝕釋壓后對儲層的破壞作用。
[Abstract]:Taking the structure and front edge of Micang Mountain in northern Sichuan as the main body of study, the petrological characteristics and sedimentary facies of Dengying formation reservoir of Dengying formation are discussed by comparing the reservoirs of Sinian Dengying formation in Gaomo area of central Sichuan and Weiyuan area in southwest Sichuan. The types and development of reservoir space, physical characteristics, diagenesis, and mechanism of formation and preservation of high-quality reservoirs in deep and ultra-deep Dengying formation in Sichuan superimposed basin are analyzed. The results show that the Dengying formation in the northern margin of Sichuan Basin can be divided into open platform facies and restricted platform facies, mainly limited platform facies, and the open platform meets each other in the third section of the Fucheng section, which is a set of clastic rocks deposited near the coast, and the algal cloud flat is developed within the restricted platform. Algae-sand beach, granular beach, oolitic beach and Niyunping. From Doushantuo formation to the end of the third section of Dengshan, it has generally experienced the near shore. 鈫扵idal intertidal. 鈫扴ubtidal high energy. 鈫扵idal intertidal. 鈫扵he coastal environment changes, the sea level experienced a secondary ascending and descending cycle, and the fourth section of the lamp can be seen in a number of subtidal-intertidal-upper-tidal sedimentary cycle, The rock types of the Dengying formation of the Sinian system in North Sichuan are mainly composed of complex and diverse microbe rocks, which are mainly grape stone, nucleate stone, foam laminate, cladding granular rock, stromatolite, etc. Cementite, spherulitic, dendritic and lamellitic rocks, mainly agglomerate, grapestone and lamellae, followed by foam cottonite and kernelitic stone. Among them, the fourth segment of the lamp is composed of relatively dense mudstone dolomite, which is mainly composed of mud cloud flat. The microbial carbonate rocks developed locally (mainly at the top). The microbial carbonate reservoirs of the Micang Mountain and the Dengying formation are mainly distributed in the second and fourth sections of the lantern formation. The types of reservoir space are divided into two categories and four subclasses, two of which are fracture-cavity type and pore type space type, and four small types are: 1) karst voids (including karst caverns). Intergranular (dissolving) pores (including dissolved fractures and cracks) intergranular (dissolved) pores (including sand debris, condensate intergranular dissolved pores, different layers, The main reservoir space assemblages are also different in different regions. The porosity of the second stage of Maisheng 1 well is 1.5-4.6, with an average of 3.3and a permeability of 0.011-0.684) 脳 10-3 渭 m ~ (2), averaging 0.248 脳 10 ~ (-3) 渭 m ~ (2); the porosity of the fourth member of Fucheng section lamp is 0.36-2.76 (mean 1.27, permeability 0.03-0.164) 脳 10 ~ (-3) 渭 m ~ (2), and the average of Tianxing1 well lamp is 0.192 脳 10 ~ (-3) 渭 m ~ (2), the average is 0.192 脳 10 ~ (-3) 渭 m ~ (2). The porosity is 1.71-4.76, the average value is 3.065 and the permeability is 0.0016-0.0129) 脳 10-3 渭 m2, mainly distributed in 0.001-0.01) 脳 10-3 渭 m2.The average value is 0.0055 脳 10-3 渭 m2. The diagenetic evolution sequence in the study area is as follows: cloud and mud sediments. 鈫扨article hardening / microbial sludge crystallization. 鈫扴edimentary karstification / dolomitization. 鈫扖ementation / pyritization / light and light crystallization. 鈫，

本文編號：1603195