Abstract
In recent years, the application of electrical explosion shockwave as a stimulation technology is increasing in oil fields, but lacks relevant theoretical knowledge to support it. In view of this problem, a research was carried out on experimental study of electrical explosion shockwave stimulation on the tight sand reservoir to determine the effective range of the resulting effects. An experimental platform for testing electrical explosion shockwave is established. Porosity, permeability and other mechanical parameters of tight sand stone samples are tested before and after electrical explosion shockwave treatment. The result shows clear improvement of the above mentioned parameters and the effective range.
Highlights
The proved reserves of low permeability oil and gas have amounted to half of the total proved reserves [1–5] and the low permeability oil and gas reservoirs have become an important part for stable development of Chinese onshore industries
The inability to produce from low permeability reservoirs at economic rates has prompted the development of stimulation techniques to improve recovery of oil and gas from such reservoirs
This paper presents a research on electrical explosion shockwave stimulation of tight sand reservoir
Summary
The proved reserves of low permeability oil and gas have amounted to half of the total proved reserves [1–5] and the low permeability oil and gas reservoirs have become an important part for stable development of Chinese onshore industries. The inability to produce from low permeability reservoirs at economic rates has prompted the development of stimulation techniques to improve recovery of oil and gas from such reservoirs. Acid fracturing, thermal and chemical applications as formation stimulation techniques have contributed immensely in improving oil and gas recovery from tight formations. The explosive shockwave technology as a supplementary fracturing technique, was introduced into oil industry many years ago. It had a better effect on the oil production, it was not widely used because there were many uncertainties which include but not limited to (i) the explosives not being able to detonate successively and repeatedly along the production formation, (ii) the possibility of the explosion damaging the wellbore
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