| Abstract |
The Sol de Mañana field is located in Bolivia in the department of PotosÃ, Sud Lipez province. The field has 5 wells already drilled. The capacity of the field from the wells and superficial studies is estimated to be 100MWe. Approximately 25 more geothermal wells are to be drilled to harness this energy. However, the first power plant will be installed as soon as 50 MWe are available at the wellhead. Interference tests will be carried out to determine if there is any connection between the wells and to have a better knowledge of the reservoir. Drilling of new wells and testing of the previously drilled wells will be carried out simultaneously. caution will be made to minimize interference of the involved wells. When flow testing production tests, the Russel James method will be used to measure the well capacity. Orifice plates (Sizes 4, 6 and 8 inches in diameter) will be used to maintain the head pressure, the lip pressure will be measured in the lip pressure spool while the amount of brine produced will be measured in the weir box. The old wells will also be monitored for changes in pressure and water column inside the well. Drilling pad 3 has three wells, namely SM-3 (old), SM-31(new) and SM-32 (new). SM-31 will be the first well to be tested while monitoring wells SM-1, SM-2 and SM-3 for interference. Thereafter, the simultaneous testing will be started, whereby all the aforementioned wells will be opened using an 8 "orifice plate for a period of 5 days. Both the individual and simultaneous tests take approximately 40 days. The objective of the tests is to obtain the production capacity, the pressure and the temperature of the wells and to establish if there exists interference between the wells. The tests results together with geological studies can be used to revise the conception model of the reservoir. |