油气地质与采收率2025，Vol.32Issue(3)：28-37,10.DOI:10.13673/j.pgre.202311035
基于X射线衍射和毛细管吸吮时间的页岩储层黏土稳定剂评价方法
Evaluation methods of clay stabilizer in shale reservoirs based on X-ray diffraction and capillary suction time
摘要
Abstract
The differential evaluation of fracturing fluid and its additives is an important link in the integrated development process of shale reservoir engineering geology,and clay stabilizer is a crucial additive.Therefore,the rapid screening of clay stabilizers plays an important role in protecting shale reservoirs and ensuring fracturing effects.By introducing the detection method of capillary suction time(CST)and combining it with the mineral composition of core samples obtained by X-ray diffraction,the calculated CST of core samples from shale reservoirs was obtained by weighting.The correlation between the detected and calculated CST of core samples and the calculated and detected cation exchange capacity(CEC)obtained by the traditional clay stabilizer evaluation method was established,respectively.It was found that they all had the same changing trend as the detected CEC.By introducing the proportional coefficient,the detected and calculated CST was fitted with the calculated CEC,and the corresponding fitted detection value of CEC was obtained.The relative errors between them and detected CEC were analyzed,respectively,and it was found that the average relative errors were all less than 5%.The experimental results show that both the detected CST of core samples and the calculated CST based on X-ray diffraction and standard mineral CST detection value can be used to evaluate and screen clay stabilizers.Compared with the traditional CEC evaluation method,the CST detection method is rapid and accurate and is suitable for the complex clay mineral composition and strong heterogeneity of shale reservoirs.关键词
页岩储层/水化膨胀/黏土稳定剂/阳离子交换容量/毛细管吸吮时间Key words
shale reservoir/hydration expansion/clay stabilizer/cation exchange capacity/capillary suction time分类
石油、天然气工程引用本文复制引用
何延龙,王鑫,薛小佳,黄海,吴江,刘晓庆,唐思源,虎志强..基于X射线衍射和毛细管吸吮时间的页岩储层黏土稳定剂评价方法[J].油气地质与采收率,2025,32(3):28-37,10.基金项目
国家自然科学基金项目"油藏原位生物矿化物的凝聚态结构演化及其功能化碳埋存机制"(52474040),"基于低渗透油藏内源功能菌的微生物水泥自适应深部调控机制研究"(52004216),"基于人工智能的动态起裂粗糙裂缝内支撑剂运移铺置行为研究"(52474043) （52474040）
陕西省杰出青年科学基金项目"基于CFD-EDM耦合方法页岩油储层体积压裂支撑剂运移机制研究"(2022JC-37) （2022JC-37）
陕西省重点研发计划项目"低渗透油藏内源功能微生物强化CO2资源化利用机制研究"(2024GX-YBXM-496) （2024GX-YBXM-496）
西安石油大学研究生创新与实践能力培养计划"基于X射线衍射和毛细管吸吮时间的页岩储层黏土稳定剂评价方法"(YCS23213048). （YCS23213048）
