Research on Key Technology for Perforating 10?000-Metre Deep-Earth Exploration Wells
The 10 000-metre deep-earth exploration well shoulders the major tasks of scientific exploration and oil and gas discovery,and has far-reaching significance in the field of ultra-deep oil and gas exploration.In the process of perforating and completing 10 000-metre deep-earth exploration wells,it will face complex problems such as extreme high temperature and high pressure in the wellbore,ultra-long span of perforating tubing,and narrow casing space in the oil reservoir,etc.Conventional deep-earth perforating technology can no longer meet the construction requirements completely.In order to ensure the smooth perforating and completion of 10 000-metre deep-earth exploration wells,the key technology research on perforating 10 000-meter deep-earth exploration wells has been carried out,covering the development of ultra-high-temperature and ultra-high-pressure perforators,research on the mechanics of perforating tubing columns for 10 000-metre deep-earth exploration wells,and research and development of ultra-deep-perforating technology.Firstly,the perforator pressure-bearing design,supporting pyrotechnic formula,liner formula and structure were improved and upgraded respectively,numerical simulation of perforator external pressure strength is carried out,and tests of perforator extreme pressure resistance and ground target shooting are carried out,which improved the temperature and pressure resistance index of perforator to 260℃/245 MPa.Secondly,for the problem of violent vibration failure of tubing column caused by perforating blast pressure,the micro-element method,energy method combined with Hamiltonian variational principle is adopted.Thirdly,to address the problem of violent vibration failure of tubular column caused by perforating pressure,the microelement method,energy method and Hamilton's variational principle are used to establish the pressure field model of perforating pressure field and vibration model of perforating tubular column in the whole wellbore,the accuracy is verified by comparing with the experimental data collected from the field,and the calculation procedure of the dynamics of perforating tubular column in the 10 000-metre deep-earth exploration well has been formed preliminarily.Finally,based on the above software and hardware for perforating 10 000-metre deep-earth exploration wells,we upgraded the perforating process of tubular column transmission in 10 000-metre deep-earth exploration wells.Field tests have been carried out in the BZ107 well to verify the feasibility of the supporting perforator,calculation program and construction process,and laid a solid foundation for the next step of the successful implementation of 10 000-metre deep-earth exploration well perforating and completing wells.
10 000-metre deep-earth exploration wellperforatorperforated tube column mechanicsperforation processextra high temperature and high pressure
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