Research and practice of geology-engineering integration in the exploration and development of Dagang oilfield

doi:10.3969/j.issn.1672-7703.2018.02.002

Abstract

Abstract: Dagang oilfield is a typical complex fault block oilfield. After over 50 years of exploration and development, it is facing the issues of "4 highs, 3 lows and 2 unbalances". Under the dual pressure of land requisition and environment protection, and the low oil price, how to realize economic exploration and development and maintain sustainable development is a great challenge. Based on reviewing the issues and challenges, centering on "five fields construction", an integrated geology and engineering model with Dagang oilfield characteristics has been established, that is production construction in project manner, synergistic team organization, platform research and design, modular field construction, and digitalized production management. To date, this model has worked well in production. In the "cluster well site" productivity construction of old oilfields, well trajectory optimization by integrated geology and engineering research, and coupled design of downhole and surface design have been adopted, realizing intensive well construction, simplified supportive work and factory-like operation. In the recovery enhancement practice by combining secondary recovery and tertiary recovery, key technologies, program design and production performance regulation have been studied systematically, working out a tertiary recovery series which can meet the needs of different reservoirs. The production practices show integrated geologic and engineering research is an effective way to realize sustainable development for old oilfields with complex underground and surface conditions under low oil price.

Key words: geology-engineering integration, “five fields construction”, well cluster site, “combination of secondary and tertiary recovery”

CLC Number:

Zhao Xianzheng, Zhao Pingqi, Li Dongping, Wu Xi, Wang Wenchang, Tang Shizhong. Research and practice of geology-engineering integration in the exploration and development of Dagang oilfield[J]. China Petroleum Exploration, 2018, 23(2): 6-14.

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