Perforation is the 'one step closer' to oil and gas exploration and development. If the channel is not smooth, it will be difficult to produce oil or gas and it will not reflect the actual oil and gas production of the formation. The reporter recently learned in an interview that the self-developed aftereffect perforation technology in China 22 oilfield blocks were applied for 2,600 wells, and the oil well stimulation effect was satisfactory.
Lu Dawei, director of the Petroleum Logging Professional Committee of the China Petroleum Institute, said that in China, more than 70% of the newly discovered proven oil and gas reserves have oil reserves, and more than 90% of the natural gas reserves are low-porosity and low-permeability oil and gas reserves, and the proportion is still increasing year by year.
The technical team led by Tian Zhibo, chief scientist of Xi'an Ao Xing Energy Technology Co., Ltd., after more than 10 years of research and experiment, creatively proposed a safe and reliable in-hole power technology concept, and invented the 'aftereffect' device: namely, the traditional perforating bullets. On the warhead, using the metal jet generated by the shaped charge, the highly energetic 'reactive particle' is dragged into the hole to achieve explosion in the second hole. The explosion energy generated by the particle in the perforation channel can be Effectively lift the perforation tunnel compaction belt, clear the pollution of the oil perforation tunnel, and enhance the communication ability of the perforation tunnel and the natural cracks in the formation.
It is understood that this technology has been applied for 2600 wells in many oilfields across the country. Among them, oil and gas wells with a yield increase of 5 to 10 times account for 10% to 15%, and the rate of increase in production is more than 300%. Oil and gas wells, which account for 15% to 20%, and yields more than 30%, account for 60% to 70%, especially for low-porosity and low-permeability oil and gas reservoirs. The effect of increasing production is very obvious. Previously, Bohai Sea drilling wells used 'aftereffect technology'. After drilling, comparative analysis found that the oil production index increased by 22%.
Wang Xuguang, head of the China Blasting Industry Association and an academician of the Chinese Academy of Engineering, believes that the 'post-effect technology' result has been the first of its kind at home and abroad to meet the needs of China's oil energy extraction market. This technology has outstanding safety performance, and is green and effective. Raising the output of single wells is of great significance to improving the productivity of low porosity and ultra-low porosity and permeability reservoirs. After being developed and improved, it can be used in domestic oil and gas wells.
