文档介绍：中文摘要
论文题目: 鄂尔多斯盆地直罗油田北部延长组长2段储层特征研究专 业: 矿物学、岩石学、矿床学
硕士生: 国吉安(签名) 指导教师: 王桂成(签名)
摘要
直罗油田北部位于鄂尔多斯盆地伊陕斜坡东南部,含油层系主要为晚三叠世延长组 2段。本文结合钻井、录井、测井和各种化验资料,、物性测试、薄片鉴定、扫描电镜、压汞实验等方法为实验手段,研究了长2储层的沉积相、岩石学特征、孔隙结构特征、成岩作用特征、物性特征,为该区开发调整提供地质依据。
论文研究中取得的认识如下: 直罗油田按沉积旋回可将延长组长2油层组可进一步划分为长21、长22和长23,其
中长21油层为该区的主力油层。研究区长2期处于延安三角洲前端,接近前三角洲,研究区沉积微相主要为水下分流河道及分流间湾两种,河道主要呈北东一南西方展布,河道发育较稳定,砂体基本连片;长2储层主要以灰色细粒长石砂岩为主,成分成熟度较低、结构成熟度较低,粒度分选性较好,磨圆度以次棱角为主;孔隙类型以粒间孔为主,溶孔次之,喉道类型主要为微喉道;孔喉组合类型主要为小孔微喉型;砂岩储集层在埋藏成岩过程中发生的成岩作用有压实作用、胶结作用、交代作用和溶蚀作用,且主要处于晚成岩A期。储层物性宏观上主要受沉积环境的影响和控制,微观上主要受成岩作用的影响。依据岩性、孔、渗等多种因素,将储层划分为四类,本区主要为II类和III类。
关键词:鄂尔多斯盆地直罗油田北部长2储层特征论文类型:应用基础研究
Ⅱ
Subject:Study on reservoir characteristic of Chang-2 Member of Late Triassic Yanchang Formation in the Northern Zhiluo Oilfield,Ordos Basin
Speciality:Mineralogy,Petrology,Mineraldepositgeology
Name: Guo Ji’an(signature
Instructor:Wang Guicheng(signature
Abstract
ZmLuo oil field is located in southeast Ordos basin,and Chan92 are main oil bearing series in Late to its drilling,logging and experimental analysis data,and through these experimental methods such as the X-ray diffraction,physical property test,scannmg electron microscope,intrusive mercury experiment paper analyzed sedimentary facies, lithology,pores structure,diagenesis,physical property ofChan98 reservoirs,which provides
geological basis for development adjustment of the following results are received by
this researching:
Chan92 reservoir ofYanchang formation is divided into three member:Chan921,Chan92z,
Chang member are the major oil producing member in study area.
The study area of Chan92 is situated in Yan’an delta -facies are main|y
occurred in the submerge distributary channel and distributary interchannel,the channel is a distribution tending and a stable channel development,moreover,its sandbodies are fundamentally is mainly fine arkose feldspar sandstone·
Compositional