High-pressure water jet drilling and completion technology and future development

It is very important for economical and efficient development of deep oil and gas, tight oil and gas, coalbed methane using effective drilling and completion techniques to shorten construction cycle and improve single well production. High pressure water jet drilling and completion technology is a kind of advanced technology which can be used to break the rock with high energy fluid. It can be used not only for significantly increasing drilling ROP, but also for slotting stimulation. A lot of experimental research work has been carried out abroad. Through continuous innovation and improvement, some techniques have achieved the commercial application. The paper introduces the status of high-pressure water jet drilling and completion technology, and points out the problems in commercial application. Finally, specific development suggestions are proposed according to domestic high pressure water jet drilling and completion technology, including ultra high pressure water jet drilling technology with double tube, ultra high pressure water jet slotting stimulation technology, special downhole jet and cutting system, pulsed water jet technology. In view of the key techniques that are related to high pressure water jet, researches should be carried out through laboratory experiments and filed tests, so as to form our high pressure water jet drilling and completion technology and related equipment.