Method for fracturing limestone roof with carbon dioxide (CO2) and water (H2O) mixed fluids

• Main Authors: CHAI XIUWEI, JIA JINLONG
• Format: Patent
• Language: Chinese; English
• Published: 22.02.2019
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; MINING; MINING OR QUARRYING

The invention relates to a method for fracturing a limestone roof with carbon dioxide (CO2) and water (H2O) mixed fluids. A drilling location and drilling parameters are selected to arrange a fracturing drill hole in the limestone roof of a goaf, a fracturing device is inserted into the drill hole, the CO2 / H2O mixed fluids prepared by H2O and CO2 are injected into a CO2 / H2O mixed fluid generation device, and the fracturing device and the CO2 / H2O mixed fluid generation device are switched on to fracture the limestone roof. According to the method, the high pressure physical effect, watersoftening and chemical corrosion act on the limestone roof cooperatively, a good fracturing effect can be obtained, meanwhile exhaust gas of fossil fuel of a factory is used as a gas source of CO2, and the environment can be protected while resources are reasonably utilized. 本发明涉及种二氧化碳和水混合流体压裂石灰岩顶板的方法，选取钻孔位置及钻孔参数在采空区的石灰岩顶板施工设置压裂钻孔，将压裂装置插入钻孔；在CO/HO混合流体生成装置通入HO和CO制备CO/HO混合流体；接通压裂装置和CO/HO混合流体生成装置，对石灰岩顶板顶板进行压裂。根据本发明的方法将高压物理作用