Oilfield Branch Of Herringbone Horizontal Drilling Technology Research

Liaohe Oilfield in the exploration and development for oil and low sandstone hill fractured reservoir using conventional water-based drilling fluids serious dropout problem, Drilling Technology Research Institute developed a high temperature can be recycled micro-foam drilling fluid system. Oil reserves totaled 375 million tons, accounting for oil recoverable reserves(1.0856 billion tons) of 34.56%, which is lower than 0.8, the pressure coefficient reserves of about 93.82 million tons, accounting for 8.64% of recoverable oil reserves. The pressure coefficient is lower than the low-pressure formations develop 1.0, and now there are many technologies: gas drilling technology, inflatable foam drilling fluid or gas drilling technologies, but these technologies in the field application process there are different issues, in order to solve these problems, reference can be recycled abroad was opened in the 1990 s nitrogen foam drilling technology research, for low pressure, failure, fractured formations and large fractured hard formation drilling, made in improving drilling speed and reduce drilling costs, reduce pollution, etc. good results. So far, no systematic study of domestic nitrogen foam drilling fluid can be recycled reported. Through the research work done at home and abroad in terms of foam drilling fluid and the measures taken, research suitable for the formation of nitrogen bubbles at low pressure coefficient drilling conditions; chemical treatment is preferred(or synthetic) nitrogen foam drilling fluid used agents(such as foaming agent), to determine the nitrogen foam drilling fluid formulations; foaming and defoaming treatment technology research nitrogen foam drilling fluid; make foam fluid compressibility, fluidity, temperature resistance, salt resistance and Experimental study pollution performance, determine its parameters control technology; nitrogen foam for supporting test drilling site construction technology and related equipment, and gradually perfect the recipe nitrogen foam drilling fluid, formation of nitrogen bubbles can be recycled drilling site construction technology program; field tests completed research. low density of the drilling fluid, will help improve drilling speed, ultra-low pressure formations as well solve the leakage problem and reservoir protection technology. In a successful field applications, resulting in a good economic and social benefits.