A new surfactant heavy crude oil sulfonates(HCOS) was synthesized from Daqing Heidimiao oil with fuming sulfuric acid.

Synthesis of petroleum sulfonates NPS by Suizhong low solidification point naphthene-base VGO in a film sulfonation reactor;

Research on depressurization and augmented injection of petroleum sulfonate;

Application of HPLC switching technique to the analysis of petroleum sulfonate in oil phase;

Development of petroleum sulfonates for enhanced oil recovery;

The synthesis of petroleum sulfonates and the application of its complex system in enhanced oil recovery;

A simple method applicable to component analysis of petroleum sulfonates-membrane permeated gravimetry;

The result of petroleum sulphonate flooding and the study on development strategy for Wen31 block.;

A new petroleum sulphonate(PS)was prepared in a single-tube film sulphonation reactor using Suizhong naphthenic base VGO as feedstock and SO3 as sulphonation agent.

With respect to the current situation of petroleum sulphonate production,the process of sediment separation was described.

Evaluation on adaptability of residue sulfonate surface active agent to high temperature of fault block Jin-45;

A series of sulfonated heavy crude oil (SHCO) are prepared through sulfonating a heavy crude oil of Liaohe with viscosity 1 153 mPa·s at 50℃ by 50-60% sulfuric acid at low temperatures 15-20℃ and, introduced into the heavy crude at dosage 2 g/kg, reduce its viscosity at 50℃ to 786-914 mPa·s with viscosity reduction rate being 19.