CAJ | 학술논문

二氧化碳羽流地热系统(CPGS)是利用 CO2地质储存场地进行地热能开发的一种工程技术，也是整合 CO2减排与开发深部地热资源的理想方式。但伴随着对深部地热的提取，注入储层的超临界 CO2使深部咸水的 pH 值降低，导致周围岩体产生溶解和沉淀，从而引起孔隙度、渗透率等地层物性的变化，最终改变系统的生产能力和净热提取效率。以松辽盆地泉头组为目标储层，采用室内实验、数值模拟等技术手段，通过实验和数值计算结果的对比，揭示系统水岩气相互作用对热储矿物组分的改变。研究结果显示：实验过程中矿物溶解对温度和盐度变化较为敏感，而受压力影响较小；在实验和模拟时间内发生溶解的矿物主要是长石类矿物，方解石在反应后全部溶解；石英、伊利石和高岭石的矿物组分体积分数有所增加，并有少量菱铁矿生成。
이양화탄우류지열계통(CPGS)시이용 CO2지질저존장지진행지열능개발적일충공정기술，야시정합 CO2감배여개발심부지열자원적이상방식。단반수착대심부지열적제취，주입저층적초림계 CO2사심부함수적 pH 치강저，도치주위암체산생용해화침정，종이인기공극도、삼투솔등지층물성적변화，최종개변계통적생산능력화정열제취효솔。이송료분지천두조위목표저층，채용실내실험、수치모의등기술수단，통과실험화수치계산결과적대비，게시계통수암기상호작용대열저광물조분적개변。연구결과현시：실험과정중광물용해대온도화염도변화교위민감，이수압력영향교소；재실험화모의시간내발생용해적광물주요시장석류광물，방해석재반응후전부용해；석영、이리석화고령석적광물조분체적분수유소증가，병유소량릉철광생성。
CO2 plume geothermal systems (CPGS )is an engineering technology for integrating carbon geological storage with geothermal energy development.When the supercritical CO2 is injected into a deep reservoir,the pH of reservoir water will be decreased.The surrounding rock will be dissolved or precipitated,so the porosity and permeability of the formation will also be changed.Based on a potential geothermal reservoir of Quantou Formation of Songliao basin,experiment and numerical simulation are used to investigate water-rock-gas chemical interaction.The research results show that the experimental process is more sensitive to temperature change,and less affected by pressure.This study will provide a theoretical basis and technical support to future CPGS project in China.