That works out to about 10 grams of oil per square foot of surface area for the earth. That might work out to a film 1mm thick. So even if you replace a good insulator that is 1mm thick with one that is less good, the earth's crust is 9-12 miles thick. That means the insulation of the Earth's crust, even if all that you have said is true is 99.999999999999995% of what it was.
Theese aereas have recorded temperature increase at land level and atmosphere temperate increases of 4.5 c well over the 1.5c feared marker, as a result of taking gas oil or coal out of of different aerea, the water filled theese holes and extracted afterwards and was unusually warm,
That means more heat was escaping after they removed the oil from theese aereas, which scientists believe has caused a lot more heat spots around the world, other than volcanoes.