内容导读随着5G网络的广泛部署与应用,全球通信产业正迈入以智能化、泛在化、绿色化为核心特征的6G发展新阶段。6G不仅聚焦于极致的通信性能提升,还承载着构建智慧社会、推动产业数字化转型的使命。在这一背景下,物联网(Internet of Thi...内容导读随着5G网络的广泛部署与应用,全球通信产业正迈入以智能化、泛在化、绿色化为核心特征的6G发展新阶段。6G不仅聚焦于极致的通信性能提升,还承载着构建智慧社会、推动产业数字化转型的使命。在这一背景下,物联网(Internet of Things,IoT)作为“万物互联”的核心支撑技术,正朝着更大规模、更高智能、更强感知的方向演进,二者的深度融合成为引领未来通信技术发展的关键动力。展开更多
Micro-fractures are developed in volcanic layers of Cretaceous Yingcheng Fm in the deep part of Xujiaweizi fault depression,Songliao Basin.In the process of well drilling,various complex problems happen,such as boreho...Micro-fractures are developed in volcanic layers of Cretaceous Yingcheng Fm in the deep part of Xujiaweizi fault depression,Songliao Basin.In the process of well drilling,various complex problems happen,such as borehole wall slabbing and collapse and serious fluid leakage.Based on conventional drilling fluid plugging evaluation methods,the real situations cannot be presented accurately,especially in fracture feature simulation and plugging effect evaluation.Therefore,a specific micro-fracture plugging evaluation method was put forward especially for high-temperature deep wells in the paper.It is a new type of micro-fracture core model with the fracture apertures in the range of 1-50 mm.It is made of aluminosilicate that is compositionally close to natural rocks.It is good in repeatability with fracture-surface roughness,pore development and fracture-surface morphology close to natural fractures.Obviously,this new model makes up for the deficiencies of the conventional methods.A new micro-fracture plugging evaluation instrument was independently designed with operating temperature of 200℃ and operating pressure of 3.5-5.0 MPa.It can be used to simulate the flow regime of downhole operating fluids,with the advantages of low drilling fluid consumption,convenient operation and low cost.The plugging capacity of the organo-silicone drilling fluid system was evaluated by using this instrument.It is shown that the grain size distribution of the drilling fluid is improved and its anti-collapse capacity is enhanced.Based on the field test in Well XSP-3,the safe drilling problems in volcanic layers with developed micro-fractures are effectively solved by using the drilling fluid formula which is optimized by means of this evaluation method.And the safe drilling is guaranteed in the deep fractured formations in this area.展开更多
文摘内容导读随着5G网络的广泛部署与应用,全球通信产业正迈入以智能化、泛在化、绿色化为核心特征的6G发展新阶段。6G不仅聚焦于极致的通信性能提升,还承载着构建智慧社会、推动产业数字化转型的使命。在这一背景下,物联网(Internet of Things,IoT)作为“万物互联”的核心支撑技术,正朝着更大规模、更高智能、更强感知的方向演进,二者的深度融合成为引领未来通信技术发展的关键动力。
基金Project supported by CNPC Scientific Research and Technical Development Project“Research and Application of Supporting Drilling/Completion Techniques for Wells Treated with Special Technologies”(Grant No.2013T-0308-001).
文摘Micro-fractures are developed in volcanic layers of Cretaceous Yingcheng Fm in the deep part of Xujiaweizi fault depression,Songliao Basin.In the process of well drilling,various complex problems happen,such as borehole wall slabbing and collapse and serious fluid leakage.Based on conventional drilling fluid plugging evaluation methods,the real situations cannot be presented accurately,especially in fracture feature simulation and plugging effect evaluation.Therefore,a specific micro-fracture plugging evaluation method was put forward especially for high-temperature deep wells in the paper.It is a new type of micro-fracture core model with the fracture apertures in the range of 1-50 mm.It is made of aluminosilicate that is compositionally close to natural rocks.It is good in repeatability with fracture-surface roughness,pore development and fracture-surface morphology close to natural fractures.Obviously,this new model makes up for the deficiencies of the conventional methods.A new micro-fracture plugging evaluation instrument was independently designed with operating temperature of 200℃ and operating pressure of 3.5-5.0 MPa.It can be used to simulate the flow regime of downhole operating fluids,with the advantages of low drilling fluid consumption,convenient operation and low cost.The plugging capacity of the organo-silicone drilling fluid system was evaluated by using this instrument.It is shown that the grain size distribution of the drilling fluid is improved and its anti-collapse capacity is enhanced.Based on the field test in Well XSP-3,the safe drilling problems in volcanic layers with developed micro-fractures are effectively solved by using the drilling fluid formula which is optimized by means of this evaluation method.And the safe drilling is guaranteed in the deep fractured formations in this area.
