Professor Zhou Fengshan has long been engaged in scientific research in the fields of oilfield chemistry and oil and gas field environmental pollution control. He has made outstanding achievements and performed a lot of innovative work in the research directions of green oilfield chemical development, harmless and recycling of waste drilling fluid/fracturing flowback fluid/heavy oil sludge, drilling fluid and health risk management, oil and gas reservoir injury and protection, oil well blockage diagnosis and plugging removal decision-making technology.