Ukuhlola Okokuqala Kwe-100-Million-Ton Offshore Oilfield E-China’s Deep-Ultra-Deep Clastic Rock Formations

Ngomhla ziyi-31 kuNdasa, i-CNOOC imemezele ukutholakala kwe-Huizhou 19-6 ye-oyili eShayina enezinqolobane ezingaphezu kwezigidi eziyi-100 zamathani eNingizimu China Sea. Lokhu kubonisa iShayina i-oyili enkulu yokuqala ehlanganisiwe emanzini, ezindaweni ezijulile kakhulu ze-clastic rock formations, kukhombisa amandla amakhulu okucwaninga ezinqolobaneni ze-hydrocarbon ezijulile ezweni.

Located in the Huizhou Sag of the Pearl River Mouth Basin, approximately 170 kilometers offshore from Shenzhen, the Huizhou 19-6 oilfield sits at an average water depth of 100 meters. Production tests have demonstrated a daily output of 413 barrels of crude oil and 68,000 cubic meters of natural gas per well. Through sustained exploration efforts, the field has achieved certified geological reserves exceeding 100 million tons of oil equivalent.

The "Nanhai II" drilling platform is conducting drilling operations in the Huizhou 19-6 oilfield waters

In offshore oil and gas exploration, formations with burial depths exceeding 3,500 meters are technically classified as deep reservoirs, while those beyond 4,500 meters are categorized as ultra-deep reservoirs. Exploration in these deep-ultra-deep marine environments presents formidable engineering challenges, including extreme high-temperature/high-pressure (HT/HP) conditions and complex fluid dynamics.

Clastic rock formations, while serving as primary hydrocarbon-bearing reservoirs in deepwater settings, exhibit characteristically low permeability characteristics. This inherent petrophysical property significantly compounds the technical difficulties in identifying commercially viable, large-scale oilfield developments.

Globally, approximately 60% of newly discovered hydrocarbon reserves in recent years have been sourced from deep formations. Compared with mid-shallow reservoirs, deep-ultra-deep formations exhibit distinctive geological advantages including elevated temperature-pressure regimes, higher hydrocarbon maturity, and proximal hydrocarbon migration-accumulation systems. These conditions are particularly conducive to the generation of natural gas and light crude oil.

Ngokukhethekile, lezi zimo ziqukethe izinsiza ezinkulu ezingakatholakali ezinezinga eliphansi lokuhlola, zibeka lezi zindawo njengezindawo ezibalulekile zokufaka esikhundleni ukuze kuqinisekiswe ukukhula kwemithombo yesikhathi esizayo nokuthuthukiswa kokukhiqiza embonini ye-petroleum.

Offshore clastic rock reservoirs in deep-ultra-deep formations tend to produce sand and silt during oil/gas extraction, posing risks of abrasion, clogging, and erosion to subsea Christmas trees, manifolds, pipelines, as well as topside processing equipment. OurHighly anti-erosion Ceramic Hydrocyclone Desanding Systemshave been widely used in oil and gas fields for years. We are confident on that, in addition to our advanced desanding solutions, the newly discovered Huizhou 19-6 Oil & Gas Field will also adopt ourHigh-efficiency Hydrocyclone Oil Removal System、Compact Injet-Gas Flotation Unit (CFU) na neminye imikhiqizo.