Practice of collaborative construction of associated gas drive stimulation oil recovery and underground gas storage in offshore oil fields
Received date: 2023-07-03
Revised date: 2023-09-25
Online published: 2024-03-07
Supported by
The Science and Technology Research Project of China National Offshore Oil Group Co., Ltd(CNOOC-KJ135KJXMQD2020-004)
Aiming at the problem of combustion and emptying of excess associated gas in offshore oil fields, the technology of associated gas recovery, collaborative construction of underground gas storage (UGS) and gas drive stimulation oil recovery is of great significance for “increasing oil and gas storage and production” and improving gas “production, supply, storage and marketing” system. According to the purpose of each stage of offshore oilfield development and construction, the associated gas drive stimulation oil recovery and UGS collaborative construction is divided into four stages: Oilfield development and construction, associated gas displacement oil production, associated gas drive stimulation oil recovery and UGS collaborative construction, and UGS operation. The key technology system of offshore associated gas recovery and treatment, re-injection oil reservoir, injection oil displacement, gas recovery and storage, and collaborative construction of UGS has been formed, and the pilot collaborative construction has been carried out in Weizhou 12-1 Oilfield. The results show that: (1) Compared with water drive oil recovery, associated gas drive can increase oil recovery and reduce carbon emission. (2) The production platform and supporting facilities have been fully utilized for collaborating construction oil reservoir type UGS in offshore. (3) The UGS construction cost is low and operation is efficient. The technical system and practice of the research scheme can realize multiple functions such as energy saving and emission reduction, gas drive oil recovery, gas storage and peak regulation, and is an important direction for improving the quality and efficiency of oil and gas business.
Jingyao SUN , Jiaojiao YU , Yongxin MA , Shixin JIANG , Hao LEI , Anran WANG . Practice of collaborative construction of associated gas drive stimulation oil recovery and underground gas storage in offshore oil fields[J]. Natural Gas Geoscience, 2024 , 35(3) : 553 -562 . DOI: 10.11764/j.issn.1672-1926.2023.09.017
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