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    • 2. 发明申请
    • HYDRAULIC FRACTURING OF SUBTERRANEAN FORMATIONS
    • 水力压裂液压破碎
    • WO2012012439A1
    • 2012-01-26
    • PCT/US2011/044551
    • 2011-07-19
    • ACT OPERATING COMPANYWATSON, Marshall Charles
    • WATSON, Marshall Charles
    • E21B43/267C09K8/80E21B43/26
    • E21B43/267
    • Methods of hydraulically fracturing subterranean coal seams and formations resulting in improved permeability to stimulate coalbed methane. In one method, the coal seam is fractured using a proppant-containing fracturing fluid in alternating stages with an aqueous base solution configured to etch the fracture faces of the coal and thereby create channels for fluid flow. In another method, the coal seam is fractured using a fracturing fluid without propping agents in alternating stages with an aqueous oxidizing solution that is pumped at a pressure sufficient to maintain the fractures in an open position thereby etching the fracture faces to create channels for fluid flow. In yet another embodiment, the aqueous oxidizing agent solution is pumped into the formation at a pressure sufficient to create fractures therein and simultaneously etch the faces of the open fractures to thereby form channels in the faces for increased fluid flow.
    • 水力压裂地下煤层和地层的方法,导致改善渗透性,刺激煤层气。 在一种方法中,使用含有支撑剂的压裂液交替地将煤层断裂,其中碱性溶液水溶液被配置为蚀刻煤的断裂面,从而形成用于流体流动的通道。 在另一种方法中,使用不带支撑剂的压裂液与不含支撑剂的压裂液一起裂解,所述压裂液与氧化水溶液一起被泵送,所述水性氧化溶液在足以将裂缝保持在打开位置的压力下被泵送,从而蚀刻断裂面以产生用于流体流动的通道 。 在另一个实施方案中,将氧化剂水溶液以足以在其中产生裂缝的压力泵送到地层中,同时蚀刻开放裂缝的面,从而在面中形成用于增加流体流动的通道。