油气田开发

静态条件下碳酸盐岩三维孔隙网络的溶蚀改造及其对孔隙结构的影响

  • ANDRIAMIHAJA Spariharijaona ,
  • PADMANABHAN Eswaran ,
  • BEN-AWUAH Joel ,
  • SOKKALINGAM Rajalingam
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  • 1.Hydrocarbon Recovery and Technology, Group Research and Technology, PETRONAS Research Sdn.Bhd., Jalan Ayer Itam, Kawasan Institusi Bangi, 43000 Bandar Baru Bangi, Selangor, Malaysia;
    2.Department of Geosciences, Faculty of Petroleum Engineering and Geosciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia;
    3.Department of Applied Geology, Faculty of Engineering and Science, Curtin University, CDT250, Miri 98009, Sarawak, Malaysia;
    4.Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia
ANDRIAMIHAJA Spariharijaona(1979-),男,马来西亚人,博士,马来西亚国油科技大学石油地质科学院油藏工程师,主要从事油气开采技术、油藏工程的研究工作。地址:PETRONAS Research Sdn Bhd,Jalan Ayer Itam,Kawasan Institusi Bangi,43000 Bandar Baru Bangi,Selangor,Malaysia。E-mail:spariharijaona.andr@petronas.com.my

收稿日期: 2018-08-11

  网络出版日期: 2019-01-22

Static dissolution-induced 3D pore network modification and its impact on critical pore attributes of carbonate rocks

  • ANDRIAMIHAJA Spariharijaona ,
  • PADMANABHAN Eswaran ,
  • BEN-AWUAH Joel ,
  • SOKKALINGAM Rajalingam
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  • 1.Hydrocarbon Recovery and Technology, Group Research and Technology, PETRONAS Research Sdn.Bhd., Jalan Ayer Itam, Kawasan Institusi Bangi, 43000 Bandar Baru Bangi, Selangor, Malaysia;
    2.Department of Geosciences, Faculty of Petroleum Engineering and Geosciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia;
    3.Department of Applied Geology, Faculty of Engineering and Science, Curtin University, CDT250, Miri 98009, Sarawak, Malaysia;
    4.Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia

Received date: 2018-08-11

  Online published: 2019-01-22

摘要

为了确定溶蚀对碳酸盐岩孔隙结构的影响,保持pH值和HCl溶液浓度等参数不变,使用泥质灰岩和颗粒灰岩作为研究样品在不同温度下进行了溶蚀实验、X射线微型CT成像、岩石薄片分析实验。研究确定了碳酸盐岩溶蚀释放的Ca2+浓度与时间的关系;溶蚀前后的孔径分布表明温度和孔径变化之间没有相关性,颗粒灰岩中的孔径变化更显著,说明孔径变化主要受岩石本身的物性(初始孔隙度和渗透率)和不稳定矿物的丰度(与晶体形状、大小和矿物类型有关)控制。2种碳酸盐岩在不同温度下的孔喉半径变化量非常小,为0.003~0.040 mm,增加倍数为1.3~3.5,平均为1.7;孔喉长度变化量为0.05~0.35 mm。孔喉半径、长度和连通性的微小变化对渗透率也有很大影响,渗透率变化量高达1 000×10-3 μm2图13表2参39

本文引用格式

ANDRIAMIHAJA Spariharijaona , PADMANABHAN Eswaran , BEN-AWUAH Joel , SOKKALINGAM Rajalingam . 静态条件下碳酸盐岩三维孔隙网络的溶蚀改造及其对孔隙结构的影响[J]. 石油勘探与开发, 2019 , 46(2) : 361 -369 . DOI: 10.11698/PED.2019.02.16

Abstract

To determine the effect of dissolution on pore network development in carbonate rocks, dissolution experiments, X-Ray microtomography, and thin section analysis were conducted on argillaceous limestone and grain limestone samples at different temperatures and constant pH, HCl concentration. The relationship between Ca2+ concentration and time was revealed through the experiments; pore size distribution before and after dissolution indicate that there is no correlation between the temperature and pore size variation, but pore size variation in grain limestone is more significant, indicating that the variation is mainly controlled by the heterogeneity of the rock itself (initial porosity and permeability) and the abundance of unstable minerals (related to crystal shape, size and mineral type). At different temperatures, the two kinds of carbonate rocks had very small variation in pore throat radius from 0.003 mm to 0.040 mm, which is 1.3 to 3.5 times more, 1.7 on average of the original pore throat radius. Their pore throat length varied from 0.05 mm to 0.35 mm. The minor changes in the pore throat radius, length and connectivity brought big changes to permeability of up to 1 000×10-3 μm2.

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