Abstract: CNPC has been continuously developing its information infrastructure for more than 30 years, going through three stages: decentralized construction, centralized construction, and integrated applications. Now the company is moving forward to a new stage of collaboration and sharing—a “sharing CNPC”. There are “three-multiple” issues in CNPC’s upstream business: multiple platforms, multiple databases, and multiple isolated applications. In order to meet the requirements of digital transformation and development, combining with actual business needs and the general development trend of information technologies, CNPC has created the E&P Dream Cloud and Data Lake technologies. This development required systematic study of the data resource systems of the upstream business and deep analysis of data aggregation, storage, and applications. The Data Interlinked Lakes scheme has been designed and constructed based on the unified Data Lake that is part of Dream Cloud v1.0. The structure of this scheme includes a group-level main data lake and individual data lakes for each regional oil and gas field company, all of which are logically unified and interconnected. Pilot verification of the system achieved the expected results, providing strong support for the construction of a new data eco-environment: Dream Cloud v2.0.

Key words: E&, P Dream Cloud, Data Interlinked Lakes, data eco-environment, data storage, shared application