本文選題：梨樹斷陷 + 金山氣田�。� 參考：《成都理工大學(xué)》2017年碩士論文

【摘要】：金山氣田位于松遼盆地梨樹斷陷東南斜坡帶最南端,區(qū)內(nèi)長期發(fā)育古斜坡背景,是油氣長期運(yùn)移指向區(qū),其主力產(chǎn)層為沙河子組。研究區(qū)目的層儲層具有埋深大、致密低滲、物性變化快及非均質(zhì)性強(qiáng)的特點(diǎn),至今尚未開展系統(tǒng)的儲層微觀特征研究,導(dǎo)致儲層類型、孔隙演化規(guī)律及有效儲層主控因素不清,嚴(yán)重制約了該地區(qū)的勘探開發(fā)進(jìn)程。本論文研究目的層段為營城組和沙河子組。通過巖心觀察、測井、錄井等資料并結(jié)合沉積背景對營城組-沙河子組沉積相進(jìn)行研究;通過薄片觀察、掃描電鏡、X衍射分析、恒速壓汞等手段對金山地區(qū)營城組-沙河子組儲層的巖石學(xué)特征、孔隙類型及孔喉結(jié)構(gòu)特征、成巖作用特征等進(jìn)行研究,明確不同種類儲層孔喉結(jié)構(gòu)特征、成巖演化序列、孔隙演化規(guī)律;綜合分析沉積和成巖兩方面,確定有效儲層發(fā)育的主控因素。通過以上研究得出如下結(jié)論:(1)營城組-沙河子組主要有十三種巖石相及六種巖相組合類型,對應(yīng)不同的沉積亞相;沙河子組到營城組為湖盆水體變淺、盆地范圍變大,由湖相沉積向陸上三角洲沉積過渡;(2)儲層以富中酸性噴出巖和花崗巖等火山巖巖屑的巖屑砂巖、長石巖屑砂巖為主;填隙物以黏土膠結(jié)為主;孔隙類主要包括粒間孔、溶蝕孔、少量的礫石貼�？p和微孔;成巖作用包含壓實(shí)作用、濁沸石膠結(jié)、硅質(zhì)膠結(jié)、碳酸鹽膠結(jié)及粘土礦物膠結(jié),成巖階段處于中成巖A、B期。依據(jù)成巖作用特征將區(qū)內(nèi)有效儲層劃分為濁沸石膠結(jié)溶蝕砂巖、綠泥石-硅質(zhì)膠結(jié)砂巖及弱壓實(shí)-弱鈣質(zhì)膠結(jié)-溶蝕砂巖3種類型。不同類型儲層具有不同的沉積環(huán)境、孔喉結(jié)構(gòu)、成巖作用及孔隙演化特征;(3)儲層受沉積和成巖控制。剛性顆粒發(fā)育的砂礫巖-粗砂巖相儲層孔隙發(fā)育;營城組分選與物性具有明顯正相關(guān)性。孔隙度和滲透率不單一受埋深控制,還受巖石組分、成巖作用等多因素綜合影響;綠泥石膠結(jié)具有雙重作用,一方面抵消上覆地層壓力,保護(hù)原生孔隙,另一方面如果綠泥石膜較厚堵塞分割孔隙,大大降低儲層儲集性能;溶蝕作用改善儲層質(zhì)量,經(jīng)溶蝕作用后產(chǎn)生的孔隙平均占孔隙總量的59.1%。綜上,通過開展精細(xì)的儲層微觀特征研究,明確有效儲層發(fā)育的主控因素,將對金山地區(qū)下一步油氣勘探部署具有重要指導(dǎo)意義。
[Abstract]:Jinshan gas field is located at the southeastern slope of Lish fault depression in Songliao Basin. It has a long history of paleo-slope background and is a long term migration direction area of oil and gas. Its main production layer is Shahezi formation. The reservoir of the target layer in the study area has the characteristics of large buried depth, dense and low permeability, fast change of physical property and strong heterogeneity. So far, no systematic research on the microscopic characteristics of reservoir has been carried out, which leads to unclear reservoir types, rules of pore evolution and main controlling factors of effective reservoir. The process of exploration and development in this area is seriously restricted. In this paper, the target layer is Yingcheng formation and Shahezi formation. The sedimentary facies of Yingcheng formation and Shahezi formation were studied by core observation, logging, logging and sedimentary background. The petrological characteristics, pore types, pore throat structure and diagenesis characteristics of reservoirs of Yingcheng formation and Shahezi formation in Jinshan area were studied by means of constant velocity mercury pressure, and the characteristics of pore throat structure and diagenetic evolution of different types of reservoirs were determined. Pore evolution law, comprehensive analysis of deposition and diagenesis, to determine the effective reservoir development of the main control factors. The conclusions are as follows: (1) there are 13 kinds of lithofacies and six types of lithofacies assemblages, corresponding to different sedimentary subfacies, from Shahezi formation to Yingcheng formation, the lake basin water body is shallower and the basin area is enlarged. The transition from lacustrine facies to land delta deposit; (2) the reservoir is composed of lithic sandstone rich in volcanic rocks such as intermediate-acid exhalation and granite, feldspathic lithic sandstone, clay cementation as the main filling material, intergranular pores, dissolution pores, etc. The diagenesis includes compaction, zeolite cementation, siliceous cementation, carbonate cementation and clay mineral cementation. According to diagenesis characteristics, the effective reservoirs in the area can be divided into three types: zeolite cemented dissolved sandstone, chlorite siliceous cemented sandstone and weakly compact-weakly calcareous cement-dissolved sandstone. Different types of reservoirs have different sedimentary environments, pore throat structure, diagenesis and pore evolution characteristics. (3) reservoirs are controlled by sedimentation and diagenesis. The porosity of sandy gravel and coarse sand facies reservoirs developed with rigid grains, and the separation of Yingcheng formation has obvious positive correlation with physical properties. Porosity and permeability are not only controlled by buried depth, but also influenced by rock composition, diagenesis and other factors. Chlorite cementation plays a dual role, on the one hand, it counteracts overlying formation pressure and protects primary pores. On the other hand, if the chlorite film is thicker to block up and separate the pores, the reservoir performance will be greatly reduced, and the dissolution will improve the reservoir quality, and the porosity resulting from the dissolution will account for 59.1% of the total pore volume. In summary, it is of great significance for the next oil and gas exploration and deployment in Jinshan area to study the microscopic characteristics of reservoir and determine the main controlling factors of effective reservoir development.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P618.13

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