Influence of pore seepage and mineralogical characteristics on the evolution of CO<sub>2</sub> transport in the Huaziping area

DAI Shixin; WU Yixiao; LIAO Ting

doi:10.16152/j.cnki.xdxbzr.2025-05-006

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Influence of pore seepage and mineralogical characteristics on the evolution of CO₂ transport in the Huaziping area

更新时间：2025-10-31

- Influence of pore seepage and mineralogical characteristics on the evolution of CO₂ transport in the Huaziping area
- Journal of Northwest University (Natural Science Edition) Vol. 55, Issue 5, Pages: 1009-1023(2025)
- 作者机构：
  
  湖南科技大学　地球科学与空间信息工程学院，湖南　湘潭　411201
- 作者简介：
- 基金信息：
- DOI：10.16152/j.cnki.xdxbzr.2025-05-006
  CLC： P631
- Received：20 March 2025，
  
  Published：25 October 2025
- 稿件说明：
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DAI Shixin, WU Yixiao, LIAO Ting. Influence of pore seepage and mineralogical characteristics on the evolution of CO₂ transport in the Huaziping area[J]. Journal of northwest university (natural science edition), 2025, 55(5): 1009-1023.
DOI：

DAI Shixin, WU Yixiao, LIAO Ting. Influence of pore seepage and mineralogical characteristics on the evolution of CO₂ transport in the Huaziping area[J]. Journal of northwest university (natural science edition), 2025, 55(5): 1009-1023. DOI： 10.16152/j.cnki.xdxbzr.2025-05-006.

摘要

鄂尔多斯盆地是我国重要的能源化工基地，盆地内有大量的低成本、高浓度煤化工CO

气源和适宜CO

封存的低渗透油藏储存空间，是CCUS技术示范不可多得的“宝地”。但要实现低渗透油藏CO

高效驱油和有效封存仍面临着诸多挑战。以鄂尔多斯盆地延长组长6储层化子坪油区作为地质储存的目标层，开展了注入CO

与储层岩石发生地球化学反应过程的数值模拟，发现储层的初始孔隙度、渗透率和初始矿物组分对CO

的运移演化及储层水的化学变化都会产生影响。随着CO

的注入，原始矿物开始发生水文地球化学反应，部分矿物开始溶解，矿物溶解量由大到小排序为绿泥石

长石类

高岭石，矿物沉淀量排序为铁白云石

钠蒙脱

石

方解石

菱镁矿

伊利石

石英。通过对储层沉淀矿物能否以固碳矿物稳定存在进行分析，最终确定目标储层的固碳矿物组合是铁白云石+菱镁矿。目标储层中固碳矿物的出现对实现地质封存具有一定的指示作用，经研究发现，铁白云石可作为鄂尔多斯盆地延长组地质封存过程中CO

存在与否的矿物示踪剂。

Abstract

The Ordos Basin is an important energy and chemical base in China

with a large number of lowcost

high-concentration coal chemical CO

sources and low-permeability reservoir storage space suitable for CO

storage

making it an ideal candidate for CCUS technology demonstration. However

there are still many challenges to achieve efficient CO

-EOR and effective storage in low-permeability reservoirs. In this paper

we take the Haziping reservoir of the Yanchang Formation in the Ordos Basin as the target layer for geological storage

and find that the original porosity

permeability and initial mineral fraction have different levels of influence on the evolution of CO

transport and reservoir water chemistry changes through numerical simulations. As CO

is injected

the original minerals begin to undergo hydrogeochemical reactions and some of the minerals begin to dissolve

with the dissolved amounts of minerals ranked from largest to smallest: chlorite

feldspar-like

kaolinite. Mineral precipitation amounts were ranked as follows: iron dolomite

sodium montmorillonite

calcite

magnesite

illite

quartz. By analysing whether the precipitated minerals can be stabilised as carbon fixing minerals in the reservoir

the final determination of the carbon fixing mineral combination in the target reservoir is iron dolomite + magnesite. The presence of carbon fixing minerals in the target reservoir is indicative of geological storage

and it was found that iron dolomite could be used as a mineral tracer for the presence of CO

in the geological storage process.

关键词

Keywords

references

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⁰

Influence of pore seepage and mineralogical characteristics on the evolution of CO2 transport in the Huaziping area

DOI：10.16152/j.cnki.xdxbzr.2025-05-006

摘要

Abstract

关键词

Keywords

references

Influence of pore seepage and mineralogical characteristics on the evolution of CO₂ transport in the Huaziping area