水平井增产措施（分段压裂）.ppt

SurgiFracSM(Surgical Fracturing外科手术一样的压裂)外部压裂Horizontal Well Stimulation水平井增产措施 Outline What is Surgifrac? —什么是Surgifrac ？ Challenges of Horizontal fracturing—水平压裂的挑战 Overview of Technology - How it works—技术概述-工作流程 Case Histories – Proof that it works—实例-证明其作用 Questions—问题 A patented method to accurately place many fractures in a well (horizontal or vertical) often without required mechanical seals (packers)—在井内进行精确压裂的专利方法（水平或垂直）通常不要求机械密封（封隔器） Sealing done dynamically using velocity (Bernoulli)—动力密封用速度 The only method usable in Pre-perforated liners—唯一可用于射孔前尾管的压裂方法 All perforations communicate to the fracture—所有射孔通道和和压裂裂缝相连 Common Assumption Associated with Horizontal Completions: 与水平完井作业相关联的假定 Challenges挑战 Damage Removal移除损害 Vertical Permeability垂直渗透性 Depletion能量损失程度 Complexity/Risk复杂性/风险 Cost费用 Typical Implementations典型实施 Six SurgiFrac Waterfracs performed consecutively for an Openhole Chart horizontal well bore—裸眼井水平井眼六种连续外部水力压裂 Fracture Initiation Pressure Stress压裂初始压力-应力 Creation of Longitudinal and Dominant Transverse Fractures径度增长和显性横向压裂 Observed Breakdown Pressures观测破裂压力 High-Rate Uncemented Liner —高流量未固井的尾管(Ported Sub - Limited Entry) High-Rate Waterfracs -- Open Hole高速水力压裂—裸眼井 Cemented Liner固井的尾管 What If We Could….我们能做的…… Place fractures where we want 在需要压裂处进行压裂 Initiate fractures into a specific direction 在特殊方向产生裂缝 Place as many fractures as desired 尽量造多的裂缝 Place fractures without the need of mechanical isolation devices such as packers or bridge plugs 压裂无须使用机械隔离装置如封隔器或桥塞 … and even use different fluid systems in one well at the same time 在一口井内同时使用多种流体系统 SurgiFrac Mechanics外部压裂力学 How SurgiFrac Works...外部压裂工作流程 Jet places perforation tunnels in the frac plane 射流将射孔隧道置于压裂平面 Stagnation pressure plus annulus pressure creates the fracture 稳定的地面压力加环空压力产生裂缝 Boost pressure plus annulus pressure extends the fracture 增压加环空压力增大裂缝 Bernoulli effect maintains fracture entry point to have the lowest pressure in the well bore 伯努利作用保持住压裂入口点以在最低压力井眼 Annular