WEST TEXAS UNIT RESPONDS TO CO2 FLOOD.

Carbon dioxide injection in the North Cross Devonian Unit located in the Crosset Field is described. To date, one well is definitely responding to CO//2 injection and at least four others are beginning to show signs of response. The only major operating problem has been a decline in CO//2 injectivity. The only solution so far has been to convert additional wells to injectors. While the causes are not fully understood, they are suspected to be reservoir rather than well-bore conditions. The CO//2 project design, surface and down-hole facilities, and several surveillance tools used at North Cross are discussed in detail.