Shandong Deshunyuan Petroleum Tech. & Sci. Co., Ltd. has been adhering to the development concept of “Innovation-driven, Technology-leading”, and continued investment in scientific research. After nano-scale anti-collapse sealing materials such as Nano-polyester and Nano- Silicon Dioxide were put into the market in 2018, It has filled the blank of domestic high-temperature and non-fluorescent nano-scale sealing materials, and has been highly praised by users of state-owned enterprises and private enterprises.
The median particle size of Nano-polyester NP-1 is about 500 nm. Its nano-scale particle size and deformability makes it effective to block the pores of the shale formation, improve the strength of borehole and stabilize the well wall. The product is non-fluorescent, resistant up to 220 ° C, has good salt, calcium and magnesium resistance, and can be widely used in fresh water, salt water and saturated brine drilling fluids in medium deep wells, deep wells and ultra-deep wells. The product has been widely used in oil fields such as Shengli, Jianghan, Changqing and North and South Xinjiang, effectively solving the problem of wellbore stability caused by micro-nano pores in shale formations, reducing complex occurrences and saving valuable drilling time for customers. And reduces drilling costs.
The median particle size of Nano- Silicon Dioxide NS-1 is about 50 nm and is highly active and highly permeable. It can effectively block the pores and cracks of nano-scale shale that cannot be solved by other plugging materials. In addition, the surface of NS-1 particles has a large number of unsaturated bonds, which can improve the dispersion and suspension properties of clay and barite, and reduce the low-speed viscosity of high-density drilling fluid under high temperature conditions, thereby effectively improving the rheology of high-density drilling fluid. With its excellent performance, the product has won praises from oil fields such as Shengli, Southwest, North Shanxi and North and South Xinjiang as well as large private oil service enterprises. It has solved the problem of shale plugging and rheology optimizing of high-density drilling fluid which is difficult to solve by conventional materials.
At present, both materials have been successfully applied more than 300 tons in 2019, which has played a positive role in solving the problem of blocking and preventing collapse of nano-scale shale, and provided new ideas and methods for high-density drilling fluid rheology optimizing. It broke the monopoly of foreign companies in the field of water-based drilling fluid nano-materials, greatly reduced the cost of using nanomaterials, and played a positive role in the progress of domestic water-based drilling fluids.
