Petroleum Exploration History and Enlightenment in Jizhong Depression

doi:10.7657/XJPG20210308

Abstract

Abstract:

Based on a large number of literatures, this paper analyzes the exploration history in the Jizhong depression with the breakthrough of exploration understanding, transformation of exploration ideas and advancement of exploration technologies as the main line. The oil and gas exploration process of the Jizhong depression is divided into four stages：regional geological reconnaissance and exploration (1955-1972); exploration focusing on ancient buried-hill oil reservoirs (1973-1985); exploration mainly attacking the Palaeogene-Neogene structural oil reservoirs (1986-1999) and exploration of lithostratigraphic oil reservoirs and subtle buried-hill oil and gas reservoirs (2000-2019). This paper summarizes the exploration understanding, exploration ideas, exploration technologies, major exploration discoveries and reserves growth characteristics of each exploration stage. Based on which, Huabei oilfield has refined the new theoretical understanding and reservoir-forming model of buried-hill oil and gas reservoirs, and led multiple rounds of exploration and sustained discoveries in the field of buried hill through continuous innovation. The new theories of “complementarity” of oil and gas distribution and “oil accumulation in sags and troughs” effectively guide the active exploration and large-scale discoveries of lithostratigraphic oil reservoirs. The evaluation method of “play optimization-trap delineation-reservoir discovery” has effectively promoted the exploration deployment optimization of lithostratigraphic oil reservoirs. These exploration implications have deepened the understandings of oil and gas exploration and discovery in continental lacustrine fault depressions, which has important reference and guiding significance for China’s oil and gas exploration in the future.

Key words: Bohai Bay basin, Jizhong depression, petroleum exploration, exploration history, buried-hill reservoir, structural reservoir, litho-stratigraphic reservoir

CLC Number:

TE132

SHEN Hua, FAN Bingda, WANG Quan, ZHANG Yiming, YANG Dexiang, GUO Huiping, WANG Mingwei. Petroleum Exploration History and Enlightenment in Jizhong Depression[J]. Xinjiang Petroleum Geology, 2021, 42(3): 319-327.

Figures/Tables 8

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