Influence of Cyclone Oil Desorption Technology on the Change of Oil-Based Mud Cuttings Properties

Abstract

Shale gas mining produces a large number of oil-based mud cuttings, which contain organic poisons that pose a serious threat to the surrounding ecological environment of the mining site. At the same time, oil-based mud cuttings also contain oil products with recycling value. Cyclone oil desorption technology has become an effective technology for oil-based mud cuttings treatment. In order to determine the chemical composition of the oil-based mud cuttings, this paper investigates main elements and components of oil-based mud cuttings in detail. By analyzing the distribution of pore volume and particle size, the degree of desorption of pore oil in the cuttings before and after treatment by cyclone desorption technology is studied. The contents of organics, inorganics and heavy metals are investigated respectively by gas chromatography-mass spectrometer, X-ray powder diffractometer, and emission spectrometer, so as to determine that the technology can reduce the harmful effects of cuttings in oil-based mud, thereby reducing the risk of contamination to the environment. The availability of the recovered oil is proved by comparing the physicochemical properties of the recovered oil with the 0 # Diesel oil and the 5 # Industrial white oil. The results show that the application of this new type of oil removal technology can improve the effectiveness of oil-based mud cuttings deoiling, promote energy development, and ultimately benefit the local environment where shale gas is exploited.

Keywords: oil-based mud cuttings, cyclone oil desorption technology, physicochemical properties, environmental pollution risk, recovered oil