基于孔喉结构建立致密砂岩储层评价方案——以松南中央坳陷泉四段为例

doi:10.13278/j.cnki.jjuese.201706105

吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (6): 1654-1667.doi: 10.13278/j.cnki.jjuese.201706105

基于孔喉结构建立致密砂岩储层评价方案——以松南中央坳陷泉四段为例

蔡来星^1,2,3, 卢双舫³, 张训华², 肖国林^1,2, 吴志强^1,2, 黄文彪³

1. 中国地质调查局青岛海洋地质研究所, 山东青岛 266071;
2. 青岛海洋科学与技术国家实验室/海洋矿产资源评价与探测技术功能实验室, 山东青岛 266237;
3. 中国石油大学(华东)非常规油气与新能源研究院, 山东青岛 266580

收稿日期:2017-03-29 出版日期:2017-11-26 发布日期:2017-11-26
通讯作者: 卢双舫(1962),男,教授,博士生导师,主要从事油气地质学及油气地球化学方面的研究,E-mail:lushuangfang@qq.com E-mail:lushuangfang@qq.com
作者简介:蔡来星(1985),男,在站博士后,主要从事油气地质学方向的研究,E-mail:qingxin717717@126.com
基金资助:
国家重点基础研究发展计划（"973"计划）项目（2014CB239005）；国家自然科学基金项目（41330313）；国家油气重大专项（2011ZX05007-001）；教育部自主创新基金项目（15CX05046A）

Establishment of Evaluation Scheme of Tight Sandstone Reservoirs Based on Pore Throat:A Case Study on the 4th Member of Quantou Formation at Central Depression of Southern Songliao Basin

Cai Laixing^1,2,3, Lu Shuangfang³, Zhang Xunhua², Xiao Guolin^1,2, Wu Zhiqiang^1,2, Huang Wenbiao³

1. Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, Shandong, China;
2. Qingdao National Laboratory for Marine Science and Technology/Evaluation and Detection Technology Laboratory of Marine Mineral Resources, Qingdao 266237, Shandong, China;
3. Research Institute of Unconventional Petroleum and Renewable Energy, China University of Petroleum(East China), Qingdao 266580, Shandong, China

Received:2017-03-29 Online:2017-11-26 Published:2017-11-26
Supported by:
Supported by National Basic Research Program("973" Program)of China (2014CB239005), National Natural Science Foundation of China(41330313), National Oil and Gas Major Project of China (2011ZX05007-001) and Independent Innovation Project of Education Department (15CX05046A)

摘要/Abstract

摘要： 致密砂岩储层评价方案是识别储层"甜点"的基础，也是致密油勘探的重点和难点，但目前国内对此尚无统一认识。为此，以松南中央坳陷区泉四段致密砂岩为例，综合常规压汞、恒速压汞、高压压汞等多种资料对致密储层微观孔喉结构进行了精细表征，并以此为基础建立了致密砂岩储层评价方案。结果表明：研究区致密砂岩孔喉小、物性差，储集空间以次生溶孔为主；储层渗透性主要由占小部分体积的最大孔喉半径所控制，喉道半径越大、大喉道所占比例越高，致密储层的渗透率（K）就越高、品质就越好。在此基础上，由孔喉结构的差异性出发，将松南中央坳陷区泉四段致密砂岩储层分类4类，其中，石油能够充注至Ⅰ-Ⅲ类致密储层，且Ⅰ类致密储层（K为（0.1~1.0）×10^-3μm²）品质最高，可视为储层"甜点"。

关键词: 孔喉结构, 评价方案, 致密砂岩储层, 泉四段, 松南中央坳陷

Abstract: The evaluation criterion of tight sandstone reservoirs is not only the foundation to distinguish reservoir "sweet spot",but also the key and difficult point to explore tight oil. However,no unified understanding has been achieved so far. Taking the tight sandstone reservoirs of Quantou 4 Formation at the central depression in the southern Songliao basin as an example,we established the evaluation scheme of tight sandstone reservoirs on the basis of micro pore throat through integrating the subtle characterization of conventional mercury injection,constant-rate mercury injection, high-pressure mercury injection experiment,and other data. The results show that tight sandstone reservoirs in this area are characterized by small pore throats and poor physical property,whose reservoir space is dominated by the secondary solution pores. The reservoir permeability is mainly controlled by the large-radius pore throats whose volume are small. The larger the throat radius and the larger throat ratio is, the higher the permeability (K) of the tight reservoir and the better the quality. According to the differences of pore throat structures,tight sandstone reservoirs of Quantou 4 Formation at the central depression in the southern Songliao basin can be divided into four categories. Oil can be filled into the first,the second,and the third levels of tight reservoirs;and the first level of reservoirs (K=(0.1-1.0)×10^-3 μm²) are the best that can be taken as reservoir "sweet spots".

Key words: pore throat structure, evaluation scheme, tight sandstone reservoirs, Quantou 4 Formation, Central depression in southern Songliao basin

中图分类号:

P618.13

蔡来星, 卢双舫, 张训华, 肖国林, 吴志强, 黄文彪. 基于孔喉结构建立致密砂岩储层评价方案——以松南中央坳陷泉四段为例[J]. 吉林大学学报(地球科学版), 2017, 47(6): 1654-1667.

Cai Laixing, Lu Shuangfang, Zhang Xunhua, Xiao Guolin, Wu Zhiqiang, Huang Wenbiao. Establishment of Evaluation Scheme of Tight Sandstone Reservoirs Based on Pore Throat:A Case Study on the 4th Member of Quantou Formation at Central Depression of Southern Songliao Basin[J]. Journal of Jilin University(Earth Science Edition), 2017, 47(6): 1654-1667.

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基于孔喉结构建立致密砂岩储层评价方案——以松南中央坳陷泉四段为例

Establishment of Evaluation Scheme of Tight Sandstone Reservoirs Based on Pore Throat:A Case Study on the 4th Member of Quantou Formation at Central Depression of Southern Songliao Basin

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