Application of Production Chemical Foam Sticks for Compatibility of Gas Wells in Niger Delta, Nigeria

Production chemical foam stick (PC F20) was applied into three natural gas wells in Niger Delta namely WSI, WS4 and WS7 respectively to ascertain its compatibility to the wells in terms of gas production and impact on well parameters. Results obtained shows that 28.4, 15.7 and 44.2 % of water produced from WS1, WS4 and WS7 respectively were stripped off these wells after treatment with PC F20. The increase in gas production obtained from WS1, WS4 and WS7 were 15.8, 4.0 and 25.9 % respectively. WS7 with the highest bottom hole temperature (BHT) of 140 0C had the highest increase in gas production while WS4 with the least BHT of 97.9 0C had the least increase in gas production. The higher the BHT of the gas well above the melting point of PC F20 which is 122 0C the faster the dissolution time of the foam stick. The solubility rates of WS1, WS4 and WS7 were 35.0, 78.0 and 22.0 minutes respectively, this is inversely proportional to the stick falling rates which were 109, 74 and 128 ft/mins respectively. The higher the gas produced from each well the higher the condensate produced. The lower the water produced from each well the lower the fluid salt content of the well. PC F20 increases the gas production of natural gas wells while reducing the hydrostatic and well head pressure of the wells as such is recommended for old and ageing wells with high propensity for water production and reduced pressure.