本文關鍵詞： 金山氣田 營城組 巖石學特征 成巖作用 物性特征　出處：《吉林大學》2015年碩士論文　論文類型：學位論文

【摘要】：營城組是金山氣田的潛在儲集層位，也是本論文研究的目的層位。論文對金山氣田儲層砂巖的巖石學特征、成巖作用特征及儲層物性特征進行了研究，并對儲層物性的影響因素進行了分析，為進一步的油氣勘探提供理論上的支持，從而提高鉆探成功率，降低勘探風險，對提高經濟效益具有重要意義。 本文在對金山氣田4口井野外巖心描述的基礎上，通過普通薄片、鑄體薄片、掃描電鏡、X—衍射等技術方法和手段，綜合分析確定了研究區(qū)儲層砂巖的巖石類型。金山氣田營城組砂巖的主要巖石類型為巖屑長石砂巖，中粗粒砂狀碎屑結構，磨圓為次棱角—次圓狀，分選差，顆粒支撐，顆粒間以點—線接觸為主，填隙物主要為膠結物，發(fā)育連生結構、次生加大邊結構。 概括總結了成巖作用類型，劃分了成巖作用階段，建立了主要的成巖作用演化序列。金山氣田營城組儲層砂巖發(fā)育的成巖作用類型有：機械壓實作用、壓溶作用、膠結作用、交代作用、溶解作用和蝕變作用，其中機械壓實作用和壓溶作用發(fā)育程度高，造成顆粒之間緊密堆積，致使粒間孔隙大量減少；膠結作用強烈，膠結物類型多，膠結期次復雜，導致原生粒間孔大量減少；同時溶解作用發(fā)育程度差，次生孔隙含量不高，這些因素綜合作用影響了本區(qū)孔隙發(fā)育的程度。根據(jù)泥巖粘土礦物組合、伊/蒙混層比特征以及顆粒接觸類型等因素，判斷出營城組儲層砂巖成巖作用階段達到中成巖階段A期。 研究了儲層物性特征，金山氣田營城組砂巖發(fā)育的孔隙類型包括：原生粒間孔（36.9%）、粒內溶蝕孔（51.1%）、擴大粒間孔（3.9%）、粒內微孔（6.9%）和鑄�？祝�1.3%）；面孔率偏低，喉道以較細喉為主，連通性較好。孔隙度主要為特低孔，滲透率以超低滲—特低滲為主，儲層類型主要為特低孔——特低滲—超低滲型儲層。 分析了成巖作用對孔隙特征的影響，機械壓實作用、膠結作用、溶解作用和交代蝕變作用對儲層有重要的影響。隨著埋深增加，機械壓實作用增強，總體上物性變差；但當深度為2310—2450m時，，受溶解作用的影響，形成次生孔隙富集帶，儲層物性相對變好。
[Abstract]:Yingcheng formation is the potential reservoir of Jinshan gas field and the target horizon of this paper. The petrological characteristics, diagenesis and physical properties of reservoir sandstone in Jinshan gas field are studied in this paper. The influencing factors of reservoir physical properties are analyzed in order to provide theoretical support for further oil and gas exploration so as to improve the success rate of drilling and reduce the exploration risk. It is of great significance to increase economic benefits. On the basis of field core description of 4 wells in Jinshan gas field, this paper adopts technical methods and means, such as ordinary sheet, cast thin slice, scanning electron microscope (SEM) and X-ray diffraction (SEM), etc. The main rock types of the sandstone of Yingcheng formation in Jinshan gas field are lithic feldspar sandstone, medium coarse grain sandlike clastic structure, grinding circle with sub-angle-sub-circular shape, poor sorting, grain support, etc. The intergranular contact is mainly point-line contact, and the interstitial material is mainly cemented, with a contiguous structure and a secondary enlarged edge structure. The diagenesis types are summarized, the diagenesis stages are divided, and the main diagenesis evolution sequences are established. The diagenesis types of sandstone development in Yingcheng formation reservoir of Jinshan gas field are mechanical compaction, pressure-solution, cementation, etc. Metasomatism, dissolution and alteration, in which mechanical compaction and pressure-dissolution are highly developed, resulting in a close accumulation of particles, resulting in a large reduction of intergranular pores, strong cementation, many types of cementation, and complex cementation periods. As a result of the decrease of primary intergranular pores, the poor development of dissolution and the low content of secondary pores, these factors affect the degree of pore development in this area. According to the clay mineral assemblage of mudstone, It is concluded that the diagenesis stage of sandstone in Yingcheng formation reached the stage A of middle diagenesis due to the characteristics of the ratio of Iraq to Mongolia and the type of contact between grains and so on. The characteristics of reservoir physical properties have been studied. The pore types of sandstone developed in Yingcheng formation of Jinshan gas field include: primary intergranular pore (36.9%), intragranular dissolution pore (51.1%), expanded intergranular pore (3.9m), intragranular micropore (6.9g) and casting mold pore (1.3C), low porosity, and the main throat channel is finer throat. The porosity is mainly ultralow porosity, the permeability is ultralow permeability and the reservoir type is mainly ultralow porosity-ultralow permeability reservoir. The influence of diagenesis on pore characteristics, mechanical compaction, cementation, dissolution and metasomatism are analyzed. However, when the depth is 2310-2450m, the secondary pore enrichment zone is formed, and the physical properties of the reservoir become better.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13

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