BerlinerBaer;842450264 said:
That's true about the Saudi field, but the capability exists to effectively remove the oil from the water so that the field remains productive. Think about it this way: that field has been running for decades and is still 70% oil.
Normally fracking poses little risk to groundwater as long as the well is drilled and sealed correctly before they begin operations. There have been service companies, mainly a few of the small ones, who have cut corners and damaged the formation and risked contaminating ground water. There actually is major research going on with so-called traceable fracturing fluids, in which the fluid used to fracture each well has a certain chemical tracer, normally a fluorescent dye, that can be detected in groundwater at extremely low concentrations if contamination occurs. In many areas, industry is actually one step ahead of the EPA and the state and local environmental authorities. Nobody wants to get caught ruining an aquifer nowadays.
California is a bit tricky with all of its faults and terranes. I think all the worry about earthquakes is bogus but I'd imagine the threat to groundwater contamination there is higher than in the more stable ground east of the Rockies.
Fracking does require gigantic amounts of water (10 million gallons per well!) that would make it hard to pull off in CA. There is a major push to recycle fracking water but this is difficult since the salts that are present make the additives used to control viscosity ineffective. This is a major area of research.
Let's assume that the oil companies are honest and really mean well and do not want to harm the environment.
(a big assumption in view of BP's conduct in the Gulf and elsewhere).
Let's assume the oil companies are willing to cut back on their profits to protect the enviroment.
Let's assume that the oil companies actually spend the money and do a competent job in trying to seal the wells correctly.
There is still a potential for major catastrophic damage to the water supply.
1. Sh*t always happens no matter how much one tries to anticipate and protect against it.
2. Ca is Earthquake country From San Diego to Eureka and Weed. But more importantly its subsurface is riddled with underground fractures which are constantly increasing Existing faults rupture and new faults are always being discovered.
(I live in the Oakland Hills. There are many underground streams in the Oakland Hills ... because of the Hayward Fault I am told. With the constant movement of the earth near and around faults, there are numerous cracks underground. the ground water then runs along those cracks to create the underground streams.) Even without a major earthquake, the constant creep of the faults will pose major threats of underground water contamination.