岩矿测试

文章摘要

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

CAI Peng-rui,WANG Chun-lian,LIU Cheng-lin,YANG Fei,XU Hai-ming,XIE Teng-xiao,YU Xiao-can,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.DOI:10.15898/j.cnki.11-2131/td.2017.02.008

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

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Study on Pore Structure and Quantitative Parameters of the Paleocene-Cretaceous Sandstone Reservoir in Jiangling Depression by SEM and Mercury Injection Method

投稿时间：2016-04-08 修订日期：2017-03-20

DOI：10.15898/j.cnki.11-2131/td.2017.02.008

中文关键词: 江陵凹陷钾盐毛细管压力曲线孔喉特征参数储层物性相关性模型

英文关键词: Jiangling Depression sylvite capillary pressure curve pore structure parameter reservoir property correlation model

基金项目:国家自然科学基金青年基金资助项目（41502089）；国家重点基础研究发展计划（973计划）项目（2011CB403007）；中央级公益性科研院所基本科研业务费项目（K1415）；中国地质调查局钾盐资源调查评价项目（DD20160054,DD20160056）

作者	单位	E-mail
蔡芃睿	长江大学地球物理与石油资源学院, 湖北武汉 430100
王春连	中国地质科学院矿产资源研究所, 国土资源部成矿作用与资源评价重点实验室, 北京 100037	wangchunlian312@163.com
刘成林	中国地质科学院矿产资源研究所, 国土资源部成矿作用与资源评价重点实验室, 北京 100037
杨飞	长江大学地球物理与石油资源学院, 湖北武汉 430100
徐海明	中国地质科学院矿产资源研究所, 国土资源部成矿作用与资源评价重点实验室, 北京 100037
谢腾骁	北京理工大学, 北京 100081
余小灿	中国地质大学(北京)地球科学与资源学院, 北京 100083
孟令阳	长江大学地球物理与石油资源学院, 湖北武汉 430100

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中文摘要:

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 μm²；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 μm²。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。

英文摘要:

Evaluating reservoirs by pore structure has been widely used in oil and gas development, but this method has not yet been used in the evaluation of potassium salt reservoirs. The pore throat type and structure, capillary pressure curve, and quantitative feature parameters of pore throat of the Paleocene-Cretaceous-rich potassium-rich brine reservoir in Jianghan basin are studied by using a large number of reservoir porosity and pore throat data obtained by Scanning Electron Microscopy and Mercury Intrusion. Combined with the discharge pressure and other experimental parameters, the pore structure is divided into Ⅰ, Ⅱ, and Ⅲ types. The results show that the sandstone reservoirs of the Paleocene Shashi Formation are dominated by type Ⅱ pore structure with the average displacement pressure of 2.72 MPa and the average porosity of 6.32%. The sandstone reservoirs of the Cretaceous Honghuatao Formation are dominated by Ⅰ and Ⅱ pore structure types. The displacement pressure of type Ⅰ is 0.28 MPa, the average porosity is 16.99%, and the permeability is 87.79×10^-3 μm². The average displacement pressure of type Ⅱ is 1.103 MPa, the average porosity is 10.02%, and the permeability is 18.83×10^-3μm². The quality of the reservoir was evaluated by a comprehensive analysis of pore throat quantitative parameters such as maximum mercury saturation, maximum pore throat radius, median radius and mercury recovery efficiency. It is believed that the sandstone type of the Paleocene Shashi Formation is dominated by siltstone, and the quality of the reservoir is poor, which belongs to the low porosity and low permeability reservoir. The sandstone type of the Cretaceous Honghuatao Formation is mainly fine sandstone, and the reservoir is of good quality and belongs to low porosity and low permeability reservoir. This study provides a reliable geological basis for the evaluation of potassium-rich brine reservoirs and for further exploration and development.

主管单位：	中国科学技术协会
主办单位：	中国地质学会岩矿测试技术专业委员会国家地质实验测试中心