Suizhong 36-1

Suizhong 36-1 Oil Field Profile

The Suizhong 36-1 Oil Field is located in the Liaodong Bay of the Bohai Sea, China, approximately 46 kilometers off the coast in the northern part of Bohai Bay within the Liaohe subbasin.
The field is situated in shallow water with an average depth of about 30 meters.
Geologically, it is characterized as a large heavy oil field with a loose oil reservoir, strong heterogeneity, high viscosity, and a low oil/gas ratio.

The Suizhong 36-1 oil field was discovered in 1987.
Production commenced in February 1993, marking the beginning of Phase I.
Phase II production started in 2000, and the Suizhong 36-1 Phase II adjustment project began production in October 2013.
In June 2024, the field achieved a significant milestone by producing over 100 million tonnes of crude oil, making it the first offshore field in China to do so.

The field is known for producing heavy oil with a crude gravity of 14 to 19° American Petroleum Institute (API).
At its peak, the field produced more than five million tonnes of crude oil annually. As of 2024, the daily crude oil output is around 8,900 tonnes.
The recovery factor in developed blocks over 30 years of production has been 33.9%.

The field has been developed in two main phases. Phase I included three platforms, while Phase II involved one central processing platform, six wellhead platforms, a 70-kilometer oil pipeline to onshore, twelve subsea pipelines, and five subsea electric cables.
The Suizhong 36-1 Phase II adjustment project added four new platforms to the existing infrastructure.
Currently, the field has a total of 24 offshore platforms and 545 oil wells.

This project, which commenced production in February 2024, is the largest secondary development and adjustment project in offshore China.
The project includes two new central processing platforms and two new wellhead platforms. A total of 118 development wells are planned, comprising 81 production wells and 37 water injection wells.
The project aims to further tap the oilfield potential and contain the decline in production. It is expected to achieve a peak production of approximately 30,300 barrels of crude oil per day in 2025.

The project is developed with a focus on sustainable development, utilizing onshore power supply to consume green electricity generated onshore, thus promoting green and low-carbon development of offshore oil and gas resources.

The Suizhong 36-1 Oil Field is fully owned and operated by China National Offshore Oil Corporation (CNOOC).

The field has geological oil reserves of more than 300 million tonnes.
Based on economic assumptions, production from the Suizhong 36-1 field is expected to continue until it reaches its economic limit in 2046, with the field currently accounting for approximately 1% of China’s daily oil output.

The Suizhong 36-1 field acts as a hub for several satellite fields, including Luda 4-2, Luda 10-1, and Luda 5-2. The Luda Cluster in the Bohai Bay features multiple heavy oil fields, with recent developments such as the Luda 6-2 oilfield and the Luda 5-2 oilfield north phase I project.