关键词: 致密油, 油田采出水, 水质特性, 结垢趋势

Abstract: C tight oil reservoir of Changqing Oilfield is newly developed in recent years. In order to fully understand the quality characteristics of produced water from the oilfield during the exploration of the C tight oil reservoir, the water quality type, ion content, scaling trend and maximum theoretical scaling amount of the produced water from C tight oil reservoir in Changqing Oilfield are determined through on-site sampling, laboratory analysis and testing many times and combining with Scalechem chemical analysis software to simulate the scaling trend of water quality. Meanwhile, the impacts of operating temperature, pressure, pH value and other process parameters on the scaling trend of produced water is analyzed to provide a basic basis for the determination and optimization of subsequent produced water treatment and reinjection process.

Key words: tight oil, produced water from oilfield, water quality characteristics, scaling tendency