发明授权
- 专利标题: Hydraulic fracture initiation and propagation control in unconsolidated and weakly cemented sediments
- 专利标题(中): 未固结和弱粘结沉积物中的液压裂缝起始和传播控制
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申请号: US11686425申请日: 2007-03-15
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公开(公告)号: US07866395B2公开(公告)日: 2011-01-11
- 发明人: Grant Hocking
- 申请人: Grant Hocking
- 申请人地址: US GA Alpharetta
- 专利权人: GeoSierra LLC
- 当前专利权人: GeoSierra LLC
- 当前专利权人地址: US GA Alpharetta
- 代理机构: Smith, Gambrell & Russell
- 主分类号: E21B43/26
- IPC分类号: E21B43/26
摘要:
A method and apparatus for initiating and propagating a vertical hydraulic fracture in unconsolidated and weakly cemented sediments from a single bore hole to control the fracture initiation plane and propagation of the hydraulic fracture, enabling greater yield and recovery of petroleum fluids from the formation. An injection casing with multiple fracture initiation sections is inserted and grouted into a bore hole. A foam fracture fluid carrying a proppant is injected into the injection casing and opens the fracture initiation sections to dilate the formation in a direction orthogonal to the required fracture azimuth plane. Propagation of the fracture is controlled by limiting the fracture fluid form to that of a stable foam fracturing fluid during the fracturing process. The injection casing initiation section remains open after fracturing providing direct hydraulic connection between the production well bore, the permeable proppant filled fracture and the formation.
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