Fracturing fluid treatment method for improving hydration damage degree of marine shale reservoir

• Main Authors: SHI XIAOZHI, WU ZHOU, CHEN MINGZHONG, GENG ZHOUMEI, LI JUNLONG, HAN CHUNYAN, YANG HAI, FU PENG
• Format: Patent
• Language: Chinese; English
• Published: 18.10.2022
• 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 provides a fracturing fluid treatment method for improving the hydration damage degree of a marine shale reservoir, and the method comprises the following steps: oxygenation equipment is utilized to realize oxygenation of fracturing fluid, so that the oxygen content in the fracturing fluid reaches more than 90% of the saturated dissolved oxygen content; wherein the fracturing fluid is stored in the storage system, and the storage system comprises a liquid storage pool or a liquid storage tank group; the oxygenation equipment is matched with a storage system of fracturing fluid and can achieve oxygenation of the fracturing fluid through a pore plate or an air guide pipe immersed in the fracturing fluid, and air holes are formed in the air guide pipe. On one hand, the chemical reaction of pyrite and water can be enhanced, corrosion apertures are formed, meanwhile, an acid environment is generated to provide conditions for dissolution of carbonate rock minerals in a reservoir, the permeability of t