本文選題：橋口東北翼 + 沉積微相��； 參考：《新疆大學》2015年碩士論文

【摘要】：橋口東北翼是橋口油田老區(qū)滾動擴邊、增儲增產的潛力區(qū)域之一。受沉積、構造等因素的影響,地層變化大。前人的研究多基于深部地層,淺層主要含油地層沙三段上8-中2砂組的儲層特征仍不明確。本文在消化吸收前人研究成果的基礎上,運用儲層沉積學、石油地質學、地球物理測井等學科的理論和方法,通過巖心觀察、薄片鑒定、掃描電鏡結合測井、試油資料的分析,對研究區(qū)目的層的儲層特征進行了較為深入的研究。橋口東北翼沙三段上8-中2砂組共劃分為27個小層,其中有8個小層砂巖厚度較大且穩(wěn)定,為本次研究的主力小層。通過對重礦物、古水流和砂巖成分成熟度的綜合分析明確了目的層物源方向,主要來自NE和SW�？偨Y沉積相標志和測井相類型,以物源方向為基礎,結合各小層砂巖厚度在全區(qū)的分布特征,明確了沉積微相類型主要包括水下分流河道、水下河道側翼和遠砂壩,其中水下分流河道砂體為研究區(qū)最為有利砂體。儲集巖主要為巖屑長石砂巖,粒徑在0.05-0.25mm之間,顆粒分選好-中等�？紫兑匀芪g粒間孔隙和殘余原生孔隙為主。平均孔隙度為10.68%,平均滲透率為4.33mD,屬于低孔特低滲儲層。成巖作用有機械壓實與壓溶、膠結、溶蝕和交代作用。成巖階段屬于中成巖階段A期。通過對儲層巖性、物性、電性和含油性的分析,確定了有效儲層下限。利用儲集系數在平面的展布特征和有效儲層下限將研究區(qū)儲層類型分為三類,其中橋43-1塊儲集系數范圍主要在60以上,為Ⅰ類儲層,橋58塊儲集系數在40以上,屬于Ⅱ類儲層。
[Abstract]:The northeast wing of Qiaokou Oilfield is one of the potential areas for rolling expansion and increasing storage and production in the old area of Qiaokou Oilfield. The strata change greatly due to the influence of sedimentation, structure and other factors. Most of the previous studies are based on deep strata, and the reservoir characteristics of the upper 8-middle 2 sand formation in the main oil-bearing formation of shallow strata are still unclear. On the basis of digesting and absorbing the previous research achievements, this paper applies the theories and methods of reservoir sedimentology, petroleum geology, geophysical logging, etc., through core observation, thin slice identification, scanning electron microscope combined with logging, and analysis of oil test data. The reservoir characteristics of the target layer in the study area are studied deeply. The upper 8-Zhong2 sand formation in the third member of the northeast wing of Qiaokou is divided into 27 layers, of which 8 are relatively thick and stable, which are the main layers in this study. Through the comprehensive analysis of the composition maturity of heavy minerals, paleocurrent and sandstone, the source direction of the target layer is determined, mainly from NE and SW. In this paper, the sedimentary facies marks and logging facies types are summarized. Based on the source direction and the distribution characteristics of sandstone thickness in the whole area, it is clear that the sedimentary microfacies types mainly include underwater distributary channel, underwater channel flank and far bar. The underwater distributary channel sand body is the most favorable sand body in the study area. The reservoir rocks are mainly lithic feldspathic sandstone with grain size between 0.05-0.25mm and medium separation. The pores are mainly composed of intergranular pores and residual primary pores. The average porosity is 10.68 and the average permeability is 4.33mD. it belongs to low porosity and low permeability reservoir. Diagenesis includes mechanical compaction and pressure-dissolution, cementation, dissolution and metasomatism. Diagenetic stage A belongs to middle diagenetic stage. Through the analysis of reservoir lithology, physical property, electrical property and oil content, the effective lower limit of reservoir is determined. The reservoir types in the study area are divided into three categories by using the distribution characteristics of reservoir coefficients in the plane and the effective reservoir lower limit. The reservoir coefficients of Block Qiao43-1 are mainly above 60, which are class I reservoirs, and the reservoir coefficients of Block Qiao58 are above 40, which belong to class 鈪，

本文編號：1918702