ConocoPhillips + China National Offshore Oil Corporation
ConocoPhillips
Houston, Texas · 1 relationship
Active relationship
Strategic Partnership · 1994–present
China National Offshore Oil Corporation
Beijing, Beijing · 1 relationship
Analysis
ConocoPhillips and CNOOC’s Penglai relationship is organized around a production-sharing contract for Bohai Bay Block 11/05, signed in December 1994. [1] ConocoPhillips China drilled the Penglai 19-3 discovery well in May 1999, and Phase I production began on December 31, 2002. [1] CNOOC elected to participate in Phase I with a 51% working interest, while ConocoPhillips’ filings identify the Penglai interests as a continuing operated investment in the block. [2]
The development covers the Penglai 19-3, 19-9, and 25-6 fields within Block 11/05. [2] CNOOC Engineering describes the Phase I and II project as including four manned wellhead platforms, connection to WHP-A, a floating production, storage and offloading vessel, a single-point mooring system, and subsea pipelines and cables. [3] The documented project architecture therefore links field participation and operations with a substantial Chinese offshore engineering and fabrication program. [2] [3]
Development continued in stages: ConocoPhillips’ 2022 annual report records first production from Phase 3 in 2018 and Phase 4A in 2020, with Phase 4B under construction at year-end 2022. [2] The same filing says CNOOC and ConocoPhillips approved adjustments in 2022 aligning all three Penglai production-sharing licenses to expire in 2039. [2] CNOOC Engineering identifies the Penglai 19-3 Phase I and II development as its first international engineering, procurement, construction, and installation project. [3]
The relationship also includes a major operational setback: two unrelated fluid releases occurred near Penglai platforms B and C in June 2011. [4] ConocoPhillips reported approximately 115 cubic meters of oil and 416 cubic meters of mineral-oil-based drilling mud released, while CNOOC’s annual-report disclosure identifies ConocoPhillips China as operator responsible for daily operations under the contract. [4] [5] Chinese authorities ordered suspension and required cleanup, environmental-assessment revision, and development-plan work before resumption. [5] The partnership is consequently a long-running offshore development relationship whose record includes both staged production growth and a significant environmental and regulatory episode. [2] [5]
Participants
Continue through either entity
Houston, Texas · 1 record in this database
ConocoPhillips is a Delaware-incorporated independent exploration-and-production company headquartered at 925 N. Eldridge Parkway in Houston, Texas. Its 2025 Form 10-K says the company explores for, produces, transports, and markets crude oil, bitumen, natural gas, natural gas liquids, and liquefied natural gas worldwide. At December 31, 2025, production operations were reported in the United States, Norway, Canada, Australia, Malaysia, Libya, China, Qatar, and Equatorial Guinea, managed through five geographic operating segments. [1]
The present company was built through a major corporate combination. ConocoPhillips was incorporated in Delaware on November 16, 2001, in anticipation of the merger of Conoco Inc. and Phillips Petroleum Company, which was consummated on August 30, 2002. In 2012, the company completed the separation of its downstream businesses into Phillips 66 and continued as a focused upstream exploration-and-production company. [2] [3]
The portfolio combines long-established producing regions with large development programs. In Alaska, where ConocoPhillips says it has developed oil resources for more than 50 years, the company identifies Prudhoe Bay, Kuparuk, and the Western North Slope as major production hubs and reported 199 thousand barrels of oil equivalent per day from the Alaska segment in 2025. The company also identifies its Lower 48 positions as a key growth engine and maintains operations in Canada, Europe, Asia Pacific, and other international areas, including LNG-linked activities. [4] [5]
In 2025, total company production averaged 2.375 million barrels of oil equivalent per day, operating cash flow was $19.8 billion, and capital expenditures and investments were $12.6 billion. The company completed its acquisition of Marathon Oil in November 2024 and said it completed asset integration during the first half of 2025. [1]
ConocoPhillips is also relevant to partnership records involving China’s offshore-energy sector. ConocoPhillips China states that the company has developed relationships with CNOOC and Sinopec through domestic and overseas oil-and-gas projects. These references describe commercial and project relationships, not common ownership. [6]
China National Offshore Oil Corporation
Beijing, Beijing · 1 record in this database
China National Offshore Oil Corporation, commonly called CNOOC Group, was established with State Council approval on February 15, 1982, as a state-owned enterprise. The group describes itself as China’s largest offshore oil and gas producer; its registered capital is RMB 113.8 billion and it has five listed companies. [1]
CNOOC’s current portfolio extends beyond offshore exploration and development. Its stated business areas include professional technical services; refining-product sales and fertilizers; natural-gas production and power generation; financial services; and newer-energy activities such as offshore wind power. CNOOC’s own business overview presents oil and gas as the core while identifying gas and power, refining and marketing, and financial services as parts of a broader energy-industry chain. [1] [2]
The parent group should be distinguished from China National Offshore Oil Corporation Limited, or CNOOC Limited, the separately listed upstream company. CNOOC Limited says it is listed in Hong Kong and Shanghai, mainly explores for, develops, produces, and sells crude oil and natural gas, and is approximately 62.13% owned by CNOOC Group according to its corporate FAQ. [3]
That parent-subsidiary relationship also explains CNOOC Group’s relevance to partnership records involving offshore China. CNOOC Group retains the exclusive right to enter product-sharing contracts with foreign contractors for offshore-China acreage open to foreign cooperation, while CNOOC Limited performs the operating-company role under transferred rights and obligations, except for state-level management and supervision responsibilities. The group is therefore an important corporate counterparty and controlling institution in China’s offshore energy network, but it is not interchangeable with CNOOC Limited or with the engineering contractor COOEC. [4] [1]