报告黡目:直罗油田长2低渗油藏注水开发可行性研究 专 业:石油与天然气工&, :韩海龙(签名)_絲嫩灰— 指导教师:王桂成(签名)一 — 专 业: 肖光义(签名) 摘要 直罗油田是鄂尔多斯盆地典型的特低渗油田,含油层系主要为晚三叠世延长组长2 油层。本文结合钻井、录井、测井和各种化验资料,通过X-衍射、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。在此认识的基础上,通过开采方式、开发层系划 分、开发井网和井距、单井口产能力、采收率预测等研究,完成油藏开发方案的设计, 为该区下一步开发提供了有力依据。 研究认为直罗油田长21油层为该区的主力油层。研究区长2期位于延安三角洲之 上,沉积微相主要为水下分流河道及分流间湾两种,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、结构成熟度较高,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,吼道类型主要为微 吼道;孔喉组合类型主要为中孔微喉型。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。通过油藏工程分析认为本区采用一套层 系、一套井网开发较为合理。数值模拟计算结果表明,采用反九点井网,井距控制在 200~300m o 关键词:郓尔多斯盆地直罗油田延长组长2注水开发可行性 报告类型:应用研究 II 英文摘要 Subject : The Water Injection Feasibility Research on Chang 2 Low Permeability Reservoir in Zhiluo Oilfield Speciality: Oil and gas field development Name : Han hailong (signature) Instructor: Wang Guicheng (signature、 Xiao Guangyi (signature)_Q^ Abstract Zhiluo oilfield is a typical extra-low permeable oilfield, and Chang2 are main oil bearing series in Late Triassic. According to its drilling, logging and experimental analysis data, and through these experimental methods such as the X-ray diffraction, physical property test, scanning electron microscope, intrusive mercury experiment etc, the paper analyzes sedimentary fades, lithology, pores structure, diagenesis, physical property of Chang2 reservoirs.By the analysis of production method,development formation division,development well grid and well spacing,single well daily rate and recovery efficiency prediction, etc, a development plan was brought to effect for development in the area. Studies suggest that: Chang 21 oil bearing beds are the major oil producing formations in the study area. The study area of Chang2 is situated in Yan'an delta. Micro-facies are mainly occurred in the submerge distributary channel and distributary interchannel and a stable channel development. Moreover, its sandbodies are fiindamentally together. Chang2 reservoirs is mainly fine arkose feldspar sandstone. Compositional Maturity is low but textural maturity is high. Grain size sorting is better and the grain shape is mostly subangnlar. We draw the conclusion that the reservoir space of the Chang2 oil bearing is dominated by intergranular pore, secondary dissolution pore and main microthroat. Pore throat type is mainly medium pore- micro throat. Dominant diagenesis types are compaction, cementation, replacement and dissolution. Through reservoir engineering analysis, using a layer systemand a well developed network is more reasonable. Results of numerical simulation show that anti~nine square well pattern, the wells's distance in 180~ Key words: Ordos basin, Zhiluo oilfield, Chang 2 reservoir of Yanchang, Water injection development, Feasibility. 210m. ill 目录 目 录 m ife i 1.选题娜 1 2. 職现状 1 3.研究内容 2 4.研究思路和技术路线 2 5. 顺来源 3 6. 完成的工作量 3 第一章区域地质概况 4 1.1地理概况 4 1.2区域构造特征 5 1. 3地层发育特征 6 第二章沉积相与砂体分布特征 10 2.1区域沉积背景 10 2. 2沉积相特征 10 2-3沉积微相特征 11 2.4沉积相与砂体展布 12 第三章储层特征 15 3.1岩石学特征 15 3. 2成岩作用类型 17 3. 3成岩演化 20 3. 4孔隙结构特征 20 3. 5物性特征 22 3. 6储层裂缝 23 第四章油藏特征 25 4.1流体性质 25 4. 2温压特征 25 4. 3油藏类型 25 第五章油藏工程论证 26 5.1开发原则 26 5. 2开发层系划分 26 5. 3试油、试采特征 27 5.4开发方式 28 5. 5压力系统 32 5. 6单井产能 34 5. 7注水量 36 第六章注水开发方案部署 37 6.1开发技术政策研究 37 目录 6.2开发指标预测 41 胃七聿注水3:艺设计 44 7.1财现状 44 7.2水源选择及水质要求 44 7. 3注水井口及注水方式选择 44 7. 4注水管柱设计 45 7. 5井下工具的选择 45 7.6注水井投注方式 47 7. 7试注方案设计 47 m经济评价 49 8.1评价原则和依据 49 8.2投资估算 49 8. 3成本费用估算 50 8. 4财务分析与评价 50 8. 5项目风险分析 51 8. 6经济评价结论 51 结 Tfe 52 it 53