Ivanhoe to commence fracture stimulation at Yixin-2 and Zitong-1
CHENGDU, SICHUAN, April 5 /PRNewswire/ - David Dyck, President and Chief Operating Officer of Ivanhoe Energy Inc. (TSX: IE) (NASDAQ: IVAN), and Gerald Moench, President of Sunwing Energy Ltd., announced today that positive gas flows have been recorded during testing operations on the Xu-5 formation of the Zitong-1 natural gas discovery well in China's Sichuan Province.
Recent testing in the Xu-5 formation exposed up to 54 metres of pay, in five sets of perforations. A pressure build-up was recorded while the well was shut-in for a 24-hour period. The down-hole recorders and perforating system were recovered, following which the well was configured for a small acid stimulation to clean-up the perforation and near-by reservoir. The test results indicated Xu-5 reservoir pressure of 10,500 psi which is considered to be very over pressured and an encouraging indicator of reservoir quality and performance.
Subsequent testing recorded flow rates of 750,000 to 2,000,000 cubic feet a day through a three to four-millimetre choke at pressures up to 3,000 psi. During testing operations, hydrate issues were observed down hole and at the surface, which could account for some of the variation in flow rates. Bottom-hole recorders are being recovered and will be analyzed to assist in reservoir modelling and planning for a vertical well fracture stimulation program.Follow-up wire-line production-logging surveys have indicated that most of the gas flow came from the upper 18 metres of perforations. Preparations are underway for a second acid stimulation over the four sets of perforations in the lower 36 metres, which will be isolated from the top 18 metres that have undergone initial testing. The lower sets of perforations will be flow tested before the well is set up for a vertical fracture stimulation of the Xu-5's entire 54-metre perforated interval. Test results after the fracture stimulation will be analyzed to assist in planning a future horizontal well which will target the Xu-5 formation.
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