Petroleum Exploration History and Enlightenment of Changqing Oilfield in Ordos Basin

doi:10.7657/XJPG20210301

Abstract

Abstract:

This paper systematically analyzes the geological theories of hydrocarbon accumulation and summarizes the exploration achievements made by Changqing oilfield in the Ordos basin. The exploration process in the Ordos basin can be divided into five stages: (1) Oil and gas exploration for the structures in the basin and its surroundings from 1907 to 1969; (2) Oil exploration in the Jurassic paleogeomorphology from 1970 to 1979; (3) Oil and gas exploration in the Triassic delta and Ordovician karst paleogeomorphology from 1980 to 1999; (4) Oil and gas exploration for large lithological reservoirs from 2000 to 2012; (5) Exploration of tight and unconventional oil and gas since 2013. During more than 50 years of exploration practices, a number of innovative geological cognitions and theories have been developed, such as hydrocarbon accumulation in Jurassic paleogeomorphic oil reservoir groups, hydrocarbon accumulation in large delta reservoirs in continental lacustrine basin, shale oil accumulation in terrestrial freshwater lake basin, gas accumulation in tight sandstone, gas accumulation in karst paleogeomorphy and hydrocarbon accumulation in multiple series in the eastern Ordos basin, which promoted sustainable breakthroughs to oil and gas exploration in the Ordos basin.

Key words: Ordos basin, Changqing oilfield, exploration history, hydrocarbon accumulation theory, exploration enlightenment, structural reservoir, lithological reservoir, tight oil and gas, unconventional oil and gas

CLC Number:

TE132

ZHANG Caili, LIU Xinshe, YANG Yajuan, YU Jian, HAN Tianyou, ZHANG Yan. Petroleum Exploration History and Enlightenment of Changqing Oilfield in Ordos Basin[J]. Xinjiang Petroleum Geology, 2021, 42(3): 253-263.

Figures/Tables 10

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