[The Dark]

The numbers I had are probably a few years old - I was doing some interviews in the industry (for one of the Galveston refineries, IIRC - it was definitely Texas, but I'm not 100 percent sure exactly where).

So yes your figure is correct as all three states account for 59.2% of US capacity. But these are peacetime figures and all three states expect for Texas are crude oil importers.

Almost every refining state is a net importer. The US produces less crude than it refines. Using the EIA's peak average monthly crude oil production from 2011-2016 and comparing it to your list refinery capacity:
Texas: 5.67 million barrels refining, 3.45 million barrels crude (+1.6 million off-shore)
Louisiana: 3.34 million barrels refining, 0.197 million barrels crude
California: 1.99 million barrels refining, 0.561 million barrels crude
Illinois: 981,500 barrels refining, 27,000 barrels crude
Washington: 633,700 barrels refining, 0 crude
Ohio: 583,000 barrels refining, 73,000 barrels crude
Pennsylvania: 576,000 barrels refining, 19,000 barrels crude
Oklahoma: 511,300 barrels refining, 447,000 barrels crude
Indiana: 441,700 barrels refining, 7,000 barrels crude
Minnesota: 388,515 barrels refining, 0 crude
Mississippi: 377,500 barrels refining, 68,000 barrels crude
Kansas: 361,000 barrels refining, 136,000 barrels crude
Kentucky: 278,500 barrels refining, 9,000 barrels crude
Montana: 214,700 barrels refining, 82,000 barrels crude
Utah: 196,830 barrels refining, 112,000 barrels crude
Tennessee: 190,000 barrels refining, 1,000 barrels crude
Delaware: 182,200 barrels refining, 0 crude
Wyoming: 177,500 barrels refining, 237,000 barrels crude
Michigan: 132,000 barrels refining, 21,000 barrels crude
Alabama: 131,675 barrels refining, 29,000 barrels crude
New Mexico: 123,500 barrels refining, 404,000 barrels crude
Colorado: 103,000 barrels refining, 336,000 barrels crude
North Dakota: 93,300 barrels refining, 1,177,000 barrels crude
Wisconsin: 38,000 barrels refining, 0 crude
West Virginia: 22,300 barrels refining, 23,000 barrels crude
Nevada: 2,000 barrels refining, 1,000 barrels crude
Alaska: 0 refining, 561,000 barrels crude

There are other dribs and drabs of crude oil production (like Florida's 6k or New York and Idaho's 1k), but Alaska's the only major crude producer without refineries. Peak crude production was 9.408 million barrels per day in 2015, slightly more than half the refinery capacity. It's also not necessarily conveniently located, with major crude oil producers having relatively small refining capacities and not necessarily located near states with significant refining capacities (*coughNorthDakotacough*).

And if Philadelphia is likely to be glowing for years so would the big cities and oil refineries in California, Louisiana and Texas.

Most likely. The U.S. Nuclear Targets list in v2.2 includes 8 refineries in California, 7 in Louisiana, and 13 in Texas. It also includes the Delaware refinery, 3 refineries in Illinois, 1 in Indiana, 1 in Kentucky, 2 in Kansas, 1 in Mississippi, 1 in Missouri, 4 in New Jersey, 2 in Ohio, 2 in Oklahoma, 2 in Pennsylvania, and 2 in Washington. In total, 50 refineries are on the target list, and some of the strikes may have included multiple refineries located in the same city. Another 18 refineries in Canada are also on the list.

I'm not sure if striking at refining capacity is the best strategy, but it's certainly a plausible strategy, given the tendency to cluster refining capacity and the need to transport crude to refineries. Crude production tends to be more dispersed (and not necessarily near other valuable infrastructure), which makes it a less ideal target. Hitting at fuel supplies limits both civilian and military efficiency. Even if one considers the distillation of ethanol, that reduces the available food for the military and civilians, which is problematic once farm yields decline (due to the loss of modern fertilizers and pesticides, even if one ignores the drought) and the lean times start.