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当前位置: 首页 > 文章 > 陕北地区长8油层组储层特征及致密成因分析 长江大学学报(自科版)农学卷 2016,13 (35) 1-7+9
Position: Home > Articles > Characteristics of Chang 8 Reservoirs and Their Tight Oil Genesis in Northern Shaanxi Area Journal of Yangtze University(Natural Science Edition)Agricultural Science Volumn 2016,13 (35) 1-7+9

陕北地区长8油层组储层特征及致密成因分析

作  者：
周新平;楚美娟;张文选;陈璐
单  位：
低渗透油气田勘探开发国家工程实验室中石油长庆油田分公司勘探开发研究院;中油测井油气评价中心
关键词：
陕北地区;长8油层组;致密砂岩;岩石组构;填隙物
摘  要：
储层质量分析是石油地质研究的基础,对油气勘探开发具有重要意义。通过大量的普通薄片、铸体薄片、扫描电镜以及阴极发光等分析测试资料,从储层岩石组构、岩石组分的角度对陕北地区长8油层组储层特征及致密成因进行了研究。研究表明,区内长8油层组储层以岩屑长石砂岩和长石砂岩为主,粒度细,填隙物含量高;孔隙类型主要为粒间孔,长石溶孔次之,为微孔-微细喉孔喉结构;储层物性较差,属特低孔、特低渗储层。储层岩石组构、岩石组分及成岩作用控制了储层质量。利用储层岩石组构估算了其原始物性,孔隙度为38%~42%,渗透率为5~10mD,原始物性一般。岩石组分中塑性碎屑含量高,抗压实作用弱,填隙物以碳酸盐胶结、绿泥石填隙为主,水云母、硅质次之,填隙物类型及较高含量影响了成岩作用及其强度,继而最终造成了长8油层组储层致密。
译  名：
Characteristics of Chang 8 Reservoirs and Their Tight Oil Genesis in Northern Shaanxi Area
作  者：
Zhou Xinping;Chu Meijuan;Zhang Wenxuan;Chen Lu;National Engineering Laboratory for Exploration and Development of Low-permeability Oil and Gas Fields,Research Institute of Exploration and Development,Changqing Oilfield Company,PetroChina;
关键词：
Northern Shaanxi Area;;Yanchang Formation;;tight sandstone;;petrologic make up;;interstitial matter
摘  要：
As the basis of petroleum geology,reservoir quality analysis was of great significance of oil-gas exploration and development.Based on the experimental data of conventional and casting slice inspections,SEM and cathodoluminescent analysis,from the aspects of petrologic make up and rock composition the characteristics of Chang 8Reservoir and their tight oil genesis in Northern Shaanxi Area were studied.The study result indicated that feldspar-debris sandstone and feldspar sandstone in the area were the main rock types with the characteristics of fine grain and high content of interstitial matter,intergranular pore was the main pore type,the next was feldspar dissolved pores with micro and fine-micro-pore throat structures,it belonged to an extra-low porosity extra-low permeability reservoir with poor physical property.The reservoir quality was controlled by its petrologic make up,its composition and its lithology.The petrologic make up is used to estimate its original property,the porosity is 38% ~42%,its permeability is 5~10mD,its original physical property is general.The content of the plastic grains is higher with low compaction in rock composition,and the interstitial materials mainly include carbonate cementation and chlorite,followed by hydromica and silicon cementation,all of these influence the diagenesis and intension,and the Chang 8Tight Reservoir is eventually caused.

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