{'fraction_non_alphanumeric': 0.014354066985645933, 'fraction_numerical': 0.01674641148325359, 'mean_word_length': 5.182266009852217, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Chapter 10 Historical review of the contribution of geophysics to petroleum discoveries in the Tertiary basins of Myanmar

Petroleum resources from seeps or shallow excavations have been exploited by local people in Myanmar for at least 900 years for use in lighting, for medicinal purposes or as an insect repellent. When the British took over Lower Myanmar, crude oil obtained from Yenanchaung and refined in Duneedaw was supplied to India and exported to the United Kingdom or the United States of America. After the British occupied the whole of Myanmar in 1884, the Scottish Burmah Oil Company was established in the following year and commenced commercial extraction of oil from Yenangyaung; in 1902 Chauk was discovered. After 40 years of exploitation production began to decline, and further resources were sought. In 1938–40, before the Second World War in the Pacific, geophysical methods of gravity measurement by Shell and the Anglo-Iranian Oil Company (now BP) covering the whole of Myanmar were planned to aid oil exploration. A network of measurements were established along all accessible roads and navigable rivers throughout the Tertiary Belt of Central Myanmar using Holweck, Thyssen and Ising torsion balance and pendulum gravimeters.