摘要：On March 31st, China National Offshore Oil Corporation (CNOOC) announced the discovery of the Huizhou 19-6 oilfield, a billion-ton
On March 31st, China National Offshore Oil Corporation (CNOOC) announced the discovery of the Huizhou 19-6 oilfield, a billion-ton oilfield located in the eastern South China Sea. This marks China's first large-scale integrated clastic oilfield discovered in deep to ultra-deep layers.
The "Nanhai No. 2" drilling platform is conducting drilling operations
Situated in the Huizhou Sag of the Pearl River Mouth Basin (PRMB), the Huizhou 19-6 oilfield is approximately 170 kilometers from Shenzhen, with an average water depth of 100 meters. Test drilling has shown a daily output of 413 barrels of crude oil and 68,000 cubic meters of natural gas. Continued exploration efforts have confirmed geological reserves exceeding one billion tons of oil equivalent.
In offshore oil and gas exploration, formations buried deeper than 3,500 meters are classified as deep layers, while those beyond 4,500 meters are considered ultra-deep. Exploration in these layers faces multiple challenges, including high temperatures, high pressure, and complex fluid conditions. Clastic rock formations serve as key reservoirs for deep-sea oil and gas, yet their low permeability makes the discovery of large-scale reserves difficult.
In recent years, newly added oil and gas reserves worldwide, including those in China, have primarily come from deep layers. Compared with shallow and mid-depth layers, deep formations feature higher temperatures, greater pressure, higher hydrocarbon maturity, and closer proximity to source rocks, making them more conducive to the generation of natural gas and light crude oil. With abundant resources and low exploration maturity, deep formations represent a crucial frontier for future oil and gas reserves and production growth.
(Sources from CCTV News, Xinhua News Agency and Guangzhou Daily, compiled by Yangcheng Evening News)
我国在珠江口盆地勘探发现亿吨级油田
3月31日，中国海油发布消息，我国在南海东部海域勘探发现惠州19-6亿吨级油田。这是我国首次探获海上深层—超深层碎屑岩大型整装油田。
惠州19-6油田位于珠江口盆地惠州凹陷，距离深圳市约170公里，平均水深100米。经测试，钻井日产原油413桶，日产天然气6.8万立方米。通过持续勘探，实现惠州19-6油田探明地质储量超1亿吨油当量。
在海洋油气勘探领域，通常把埋深超过3500米的地层称为深层，超过4500米的地层称为超深层。海上深层—超深层油气勘探面临高温、高压和复杂流体带来的多重挑战。碎屑岩是海上深层储集油气的重要岩石类型，储层渗透性差，寻找大型油气田难。
据了解，近年来全国乃至全球新增油气的储量主要来源于深层。相比中浅层，深层具有温度高、压力大、油气成熟度高和近源成藏等特点，更利于天然气及轻质油的生成。同时，资源量丰富、勘探程度低，是未来油气储量和产量增长的重要接替区。
（羊城晚报•羊城派综合自央视新闻、新华社、广州日报）
翻译｜杨钧雅英文审校｜林佳岱
来源：羊城派