Before drilling, the underground geology needs to be understood, and drillers need to be prepared to seal the borehole, including preventing penetration of water between strata.
2.
BP will pay for the appraisal program, which would last two or three years and include nine appraisal wells and a series of three-dimensional seismic surveys of the underground geology, an effective new technology that hasn't been used much in Algeria.
3.
Among the issues in dispute are whether the untreated water might contaminate private wells that do not rely on water treatment, and whether the high-pressure injection process might disturb the underground geology in a way that could affect the purity of the existing aquifers.
मोबाइल