A laboratory study was conducted to determine the potential for paraffin deposition for three oils from offshore Angola discovery fields using drill stem test fluids. Additional tests were conducted to select an effective paraffin inhibitor and determine the appropriate chemical dosage.
Using the test results, the engineering design group planned for storage and injection of the chemical and pigging for the flowlines and pipelines.
The proposed paraffin control measures were implemented as the fields were brought on production. Coordination and planning by personnel from drilling, producing, engineering and the laboratory allowed implementation of an effective paraffin control program from the start-up of production.