Deep sea oil extraction research does not require chemical science no matter what you set the Oil rigs without chemical science settings to (tried both checked and unchecked).

Thanks for the report. It will be fixed in the next release.

Sice we are starting today and I'm not sure when the update will be (we probably won't be researching it untill tomorrow). I looked at it a bit and since the recipe seems to want it:
if settings.startup["deep_oil"].value then
data:extend{
{
type = "technology",
name = "deep_sea_oil_extraction",
icon = GRAPHICSPATH .. "technology/deep_sea_oil_extraction.png",
icon_size = 256,
effects = {
unlock("oil_rig"),
},
prerequisites = {"tank_ship", "oil-processing"},
unit = {
count = 200,
ingredients = {
{"automation-science-pack", 1},
{"logistic-science-pack", 1},
{"chemical-science-pack", 1}
},
time = 30
},
order = "c-g-b",
},
}

I would assume the mistake is somewhere in here:
if settings.startup["deep_oil"].value and (settings.startup["no_oil_on_land"] or settings.startup["no_oil_for_oil_rig"].value) then
data.raw.technology["deep_sea_oil_extraction"].unit = {
count = 300,
ingredients = {
{"automation-science-pack", 1},
{"logistic-science-pack", 1},
},
time = 30
}
end

Could I change this:
if settings.startup["deep_oil"].value and (settings.startup["no_oil_on_land"] or settings.startup["no_oil_for_oil_rig"].value) then
to this:
if settings.startup["no_oil_for_oil_rig"].value then

Will that fix it or will it just cause problems.

Regarding SunTroll's post:

if settings.startup["deep_oil"].value and (settings.startup["no_oil_on_land"] or settings.startup["no_oil_for_oil_rig"].value) then

The second part looks strange: You just check for settings.startup["no_oil_on_land"] being present, while you look at the value of settings.startup["no_oil_for_oil_rig"]. Shouldn't that rather be

if settings.startup["deep_oil"].value and (settings.startup["no_oil_on_land"].value or settings.startup["no_oil_for_oil_rig"].value) then

I'm absolutely not sure if that would solve the original problem, but it would take care of cases where settings.startup["no_oil_on_land"].value == false.

Yes, it's just missing the ".value". I can post the update right now since you asked nicely :)

Seems to be fine now. Thanks for the fast update.