According to the latest news from PetroChina, 14 ultra-deep and ultra-high pressure complex condensate gas fields such as Dina and Tazhong No. 1 have been successfully developed in its Tarim Oilfield, and the largest production base of ultra-deep condensate oil and gas has been built. By 25 th, it has produced 1.066 billion square meters of natural gas, 24.77 million tons of condensate oil and light hydrocarbons, and has become the world leader in the development of deep complex condensate gas fields.
| EDTA |
It is reported that condensate oil and gas are rich in aromatic hydrocarbons, light hydrocarbons and other scarce hydrocarbon components, and are urgently needed high-end petrochemical raw materials in the national military and civilian fields. Global condensate oil and gas resources are mainly distributed in Central Asia, Russia and North America, with buried depths ranging from 1500 meters to 4000 meters, belonging to shallow atmospheric pressure gas reservoirs, while China is mostly deep condensate gas reservoirs, with more than 80% of its proved reserves concentrated in the Tarim Basin.
The efficient development of ultra-deep and ultra-high pressure complex condensate reservoirs has no successful experience at home and abroad, which has been regarded as a worldwide problem. Since 2008, PetroChina has continuously set up projects to tackle key problems, innovated the non-equilibrium phase percolation theory of ultra-high pressure condensate gas, solved the difficult problems of gravity overlap prediction and gas channeling control, realized the continuous and stable production of condensate oil, revealed the distribution law of high-yield areas in strong geostress and heterogeneous gas reservoirs, and innovated the high-efficiency development technology and mode of ultra-deep and ultra-high pressure complex condensate gas reservoirs to achieve 590 million tons. Effective utilization of hard-to-recover reserves has overcome the bottlenecks of key engineering technologies such as clean completion, well integrity, high-pressure and long-distance mixed transportation in the development of ultra-deep and ultra-high pressure condensate gas fields, which provides support for industrial scale application.
At present, this set of innovative theory and technology has been popularized in the development of Sinopec and CNOOC condensate gas fields, which has supported the development of overseas Aksai condensate gas reservoir in Kazakhstan, Duvone condensate gas reservoir in North America and high-end technical cooperation of Umshaev offshore project in the United Arab Emirates, and has established China’s leading position in the development of deep complex condensate gas fields in the world.
| Melamine |