Scientists have linked the underground injection of oil-drilling wastewater to a magnitude-5.7 earthquake in 2011 that struck the US state of Oklahoma.

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Carbon dioxide can sometimes be sold to oil companies for injection into partially depleted wells, in order to force more petroleum out of them.

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CO2 injection is what you do when an oil field starts yielding progressively less oil.

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While other attempts are planned to block the hole, it is probable that oil will continue to pour from it for another couple of months, until relief wells are drilled to intersect and reduce the pressure in the currently flowing well and cut-off the leakage of perhaps 50 million barrels of oil contained there by the injection of concrete deep into the seabed.

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My take: Canada and the U.S. should welcome the injection of foreign capital into the North American oil and gas sector.

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Becton uses so much plastic producing its disposable injection products that margins can suffer when rising oil prices boost plastic resin costs.

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It must either be mined from the surface like coal (to which it is just as similar as it is to oil) or through expensive steam injection with or without the injection of petroleum distillates.

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With the usual steam injection methods, only a quarter or so of the oil trapped underground can be recovered.

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These generally require enhanced oil recovery techniques such as gas (CO2) injection, chemical injection, microbial injection, cyclic steam injection, steam flooding, and fire flooding.

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