INDIAN GEOGRAPHY

Detailed explanation-1: -However, the first well dug at Digboi field in Assam in September 1889 and completed in November 1890 at depth of 662 feet by Assam Railways and Trading Company Limited (AR&T Co. Ltd.), registered at London, is regarded as the first commercially successful oil discovery (200 gallons per day).

Detailed explanation-2: -Answer: (a) The world’s first oil well was drilled in Pennsylvania, USA, in 1859.

Detailed explanation-3: -Crude oil was discovered here in late 19th century and first oil well was dug in 1866. Digboi is known as the Oil City of Assam where the first oil well in Asia was drilled. The first refinery was started here as early as 1901.

Detailed explanation-4: -The correct answer is Digboi. The first oil well was discovered in Assam in Digboi. Crude oil was discovered in Digboi in the late 19th century and the first oil well was dug in 1866. Digboi is known as the Oil City of Assam where the first oil well in Asia was drilled.

Detailed explanation-5: -The earliest known gas wells were drilled in China in AD 347 or earlier. They had depths of up to about 800 feet (240 m) and were drilled using bits attached to bamboo poles.