首页 | 官方网站   微博 | 高级检索  
     

运用扫描电镜和压汞法研究江汉盆地古新统—白垩系砂岩储层孔喉结构及定量参数特征
引用本文:蔡芃睿,王春连,刘成林,杨飞,徐海明,谢腾骁,余小灿,孟令阳.运用扫描电镜和压汞法研究江汉盆地古新统—白垩系砂岩储层孔喉结构及定量参数特征[J].岩矿测试,2017,36(2):146-155.
作者姓名:蔡芃睿  王春连  刘成林  杨飞  徐海明  谢腾骁  余小灿  孟令阳
作者单位:安徽省地质调查院, 安徽 合肥 230001,安徽省地质调查院, 安徽 合肥 230001,安徽省地质调查院, 安徽 合肥 230001
基金项目:中国地质调查局地质调查项目(1212011120938,1212011220592)
摘    要:通过储集层的孔喉结构来评价储层已广泛运用于油气开发,但目前尚未运用于钾盐储层的评价。本文利用扫描电镜和压汞法获得的大量储层孔隙、孔喉实验数据,研究了江汉盆地古新统—白垩系富钾卤水砂岩储层的孔喉类型和结构、毛细管压力曲线,以及孔喉定量特征参数。研究表明,古新统沙市组砂岩储层以Ⅱ类孔隙结构为主,排驱压力平均值为2.72 MPa,孔隙度平均值为6.32%。而白垩系红花套组砂岩储层以Ⅰ、Ⅱ类孔隙结构为主,Ⅰ类排驱压力平均值为0.28 MPa,孔隙度平均值为16.99%,渗透率为87.79×10~(-3)μm~2;Ⅱ类排驱压力平均值为1.103 MPa,孔隙度平均值为10.02%,渗透率为18.83×10~(-3)μm~2。通过综合分析孔喉定量特征参数(如最大汞饱和度、最大孔喉半径、中值半径、退汞效率等)来评价储层质量,认为古新统沙市组砂岩类型以粉砂岩为主,储层质量较差,属于特低孔低渗储层;白垩系红花套组砂岩类型以细砂岩为主,储层质量较好,属于低孔低渗储层。本研究为该区富钾卤水储层评价以及进一步勘探开发提供了可靠的地质依据。

关 键 词:采样粒级  水系沉积物  造岩元素  地球化学特征  安徽南部
收稿时间:2016/10/8 0:00:00
修稿时间:2017/3/13 0:00:00

Study on Pore Structure and Quantitative Parameters of the Paleocene-Cretaceous Sandstone Reservoir in Jiangling Depression by SEM and Mercury Injection Method
CAI Peng-rui,WANG Chun-lian,LIU Cheng-lin,YANG Fei,XU Hai-ming,XIE Teng-xiao,YU Xiao-can and MENG Ling-yang.Study on Pore Structure and Quantitative Parameters of the Paleocene-Cretaceous Sandstone Reservoir in Jiangling Depression by SEM and Mercury Injection Method[J].Rock and Mineral Analysis,2017,36(2):146-155.
Authors:CAI Peng-rui  WANG Chun-lian  LIU Cheng-lin  YANG Fei  XU Hai-ming  XIE Teng-xiao  YU Xiao-can and MENG Ling-yang
Affiliation:Geological Survey Institute of Anhui Province, Hefei 230001, China,Geological Survey Institute of Anhui Province, Hefei 230001, China and Geological Survey Institute of Anhui Province, Hefei 230001, China
Abstract:Appropriate sampling grain size is very important to accurate geochemical information and better exploration effects in different landscapes. In order to determine the best sampling grain size of the sediments in the humid and semi-humid hilly landscape, a sampling experiment was carried out. Samples of two scales, -60 and -10~+80, were collected from Hulesi-Ningguodun area in southern Anhui province. 40-element high-precision data, which are needed for regional geochemical exploration, are acquired by XRF and ICP-MS. Results show that the contents of rock-forming elements in sediments are similar to the background values of regional rocks. Samples with grain size of -10~+80 scale are rich in As, Au, Hg, Mo, Pb, and Sb. Samples with grain size of -10~+80 scale have been weakly modified by the later surface weathering and reserved the original geochemical characteristics which are remarkably better than the -60 scale in delineating anomalies of mineralization and reflecting characteristics of ore-related anomalies. Therefore, the -10~+80 scale is preferred for stream sediment survey in the middle and lower mountains and hilly areas in southern Anhui province, which is meaningful to the choice of stream sediment sample grain size in performing geochemical exploration in similar landscapes in China.
Keywords:sampling scale  stream sediment  rock-forming elements  geochemical characteristics  Southern Anhui Province
本文献已被 CNKI 等数据库收录!
点击此处可从《岩矿测试》浏览原始摘要信息
点击此处可从《岩矿测试》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号