第39参第4期 2017年7月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：10007393(2017）04047707
DOI:10.13639/j.odpt.2017.04.015
特高渗疏松砂岩人造岩心的制作及评价
徐宏光熊钰王永清】周文胜’王玲】蒋情 1.西南石沟大学石油与天然气工程学院；2.中海沟研究总院
Vol. 39 No. 4 July 2017
引用格式：徐宏光，熊钰，王永清，周文胜，主玲，蒋倩.特高渗疏松砂岩人造岩心的制作及评价[J].石油钻采工艺，2017， 39(4):477-483.
摘要：由于疏松砂岩胶结程度低、结构疏松、强度小，现场取心成本昂贵且难以成型，不适用于室内实验，因此提出制作特高渗疏松岩心代替部分储层券心。为评价人遗岩心的可靠性及代表性，从岩样的粒度组成、矿物成分、孔隙度、渗造率、胶结方式、胶结指数、孔隙结构、压缩系数、力学性质以及渗流特性等方面进行了研究。结果表明，压制压力越小、胶结物含量越少、水驱强度题大，岩石强度感低，岩石感疏松题客易破坏。岩心危服应力随压制压力的减小呈幕函数降低，随胶结剂含量的减小呈对数降低，随水驱强度的增加呈对数减小。制备具有一定强度的特高渗疏松岩心至少需要压制压力4MPa，胶结剂含量在5%
关键词：特高渗；疏松砂岩；人造岩心；物理特性；力学性质
中图分类号：TE135
文献标识码：A
Preparation and evaluation on artificial core of extra high permeability unconsolidated sandstone
XU Hongguang,XIONG Yu',WANG Yongqing,ZHOU Wensheng”,WANG Ling,JIANG Qian
1. College of Petrolem & Gas Engineering, Soutinvesr Petrolerm University, Chengdir 610500, Sichun, China:
2. CNOOC Research Center, Bejing 100027, China
Citation: XU Hongguang, XIONG Yu, WANG Yongqing, ZHOU Wensheng, WANG Ling, JIANG Qian. Preparation and evalu-ation on artificial core of extra high permeability unconsolidated sandstone [ J J . Oil Drilling & Production Technology, 2017, 39(4); 477-483.
Abstract: Unconsolidated sandstone is characterized by low consolidation degree, loose structure and low strength. And besides, its coring cost is high and the cores cannot be shaped easily. As a result, the cores are not applicable to laboratory experiments. In this paper,it was proposed to make unconsolidated cores ofextra high pemeability toreplace some reservoir cores. To evaluate the reliability and representativeness of artificial cores, the rock samples were investigated from the aspects of size composition, mineral composition, porosity, permeability, consolidation mode, consolidation index, pore structure, compressibility coefficient, mechanical property and percolation characteristic. It is indicated that the lower the pressing pressure and cement content are and the higher the water flooding strength is, the lower the rock strength is, the looser the rock is and the more easily it can be damaged. The yield stress decreases ex-ponentially with the decreasing of pressing pressure, and logarithmically with the decreasing of cement content and the increasing of water flooding strength. To prepare extra high permeability unconsolidated cores with certain strength, the pressing pressure shall be at least 4 MPa and the cement content shall be about 5%. It is demonstrated that the artificial unconsolidated core is similar with reservoir cores all around, and it can replace the reservoir core for experiments. It can be used as the reference for the investigation of ultra high permeability unconsolidated cores.
Key words: extra high permeability; unconsolidated sandstone; artificial core; physical characteristic; mechanical property 基金项目：国家科技重大专项“海上稠沟高效开发新技术"（端号：2016ZX05025-001-004)。
第一作者：徐宏光（1990-),西南石沟大学在读博士研究生，主要从事沟气田开发研究工作。通试地址：(610500)四川省成都市新都区西
南石油大学石油与天然气工程学院。E-mail：627633471@qq.com
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