CAJ | 학술논문

砂岩储层中溶蚀次生孔隙的形成与碎屑岩骨架颗粒在地质流体中的矿物的溶解度密切相关。本文从温度、压力、pH值、有机酸等方面描述了石英、长石、碳酸盐矿物的溶解度特征，指出矿物溶解度和溶解组分的平衡分布主要依赖于地层温度和孔隙流体的 pH 值，而地层温度和 pH 值则通过改变地层水中络合物的形式与含量、CO2－3、HCO －3与 CO2的相对含量控制着矿物溶解度。受控于温度、压力、pH 值的储层流体作用于矿物，可导致不同矿物溶蚀次生孔隙形成机理具有明显的差异。在未来的研究中，应注重根据实际储层的温度、压力、流体等地质环境条件，结合储层岩石中的矿物组成进行实验模拟和数值模拟，以建立矿物溶解度与次生孔隙特征之间的定量关系。
사암저층중용식차생공극적형성여쇄설암골가과립재지질류체중적광물적용해도밀절상관。본문종온도、압력、pH치、유궤산등방면묘술료석영、장석、탄산염광물적용해도특정，지출광물용해도화용해조분적평형분포주요의뢰우지층온도화공극류체적 pH 치，이지층온도화 pH 치칙통과개변지층수중락합물적형식여함량、CO2－3、HCO －3여 CO2적상대함량공제착광물용해도。수공우온도、압력、pH 치적저층류체작용우광물，가도치불동광물용식차생공극형성궤리구유명현적차이。재미래적연구중，응주중근거실제저층적온도、압력、류체등지질배경조건，결합저층암석중적광물조성진행실험모의화수치모의，이건립광물용해도여차생공극특정지간적정량관계。
Pore fluids can cause the change of mineral solubility,which result dissolution or precipitation of mineral in the clastic reservoir,and the formation of dissolution secondary porosity in the sandstone reservoir is closely related to the change of mineral solubility of clastic skeleton grains in geological fluids.This paper summarizes the solubility variations of quartz,feldspar and carbonate minerals according to temperature,pressure,pH value,organic acids,etc.Previous stud-ies that mineral solubility and equilibrium distribution of dissolved components mainly depend on formation temperature and pH value of pore fluids,formation temperature and pH value control the form and content of complex,and the relative content of CO 2-3 ,HCO -3 and CO 2 in formation water dominate minerals solubility.The interactions between fluids and min-erals in the reservoir are changed by temperature,pressure,and pH value,therefore the mechanism of dissolution second-ary porosity forming is different from condition changing.There are very few previous studies of mineral solubility link to the mechanism of dissolution secondary porosity forming,and we suggest to establish a quantitative relationship between mineral solubility and the characteristics of secondary porosity,it should be paid more attention to do experiment and nu-merical simulation based on mineral composition of the reservoir rock with different temperature,pressure,fluids and other geological environmental conditions in future study.