Gas slow-release tracer agent for monitoring horizontal well and preparation method thereof

• Main Authors: YUAN CAI, HUANG LI, WEN SHOUGUO, WU YIMING, LIU YUANZHI, TIAN XIANG, GAO XIAOFEI, YAN ZHENGHE, XIE MINGYING, TAN LYU
• Format: Patent
• Language: Chinese; English
• Published: 28.06.2024
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a gas slow-release tracer agent for monitoring a horizontal well and a preparation method thereof. The gas slow-release tracer agent for monitoring the horizontal well comprises a porous core, a gas tracer agent adsorbed in the porous core, a protective layer which is arranged on the surface of the porous core and can be damaged by temperature, and a slow-release layer arranged on the protective layer, and the sustained-release layer contains a pore-forming agent which can be dissolved when encountering water. When the gas slow-release tracer agent for monitoring the horizontal well is used in the horizontal well, the pore-forming agent is dissolved in water, uniform small holes can be formed in a slow-release layer, and a protective layer can be damaged in the well, so that the gas tracer agent is slowly released after encountering hydrocarbon gas, and long-term gas production profile monitoring of a segmented horizontal gas well is realized; important data support is provided for an