Sinopec northwest oil field face along the north field special, deep geological structure brings to the exploration and development of huge challenges, for the ultra deep fault solution reservoir, overcome difficult, oil exploration and development theory of technology innovation and company management mode, to achieve high quality exploration, high benefit and development, production capacity from 34700 tons to 700000 tons, to March 31, 2019, the cumulative oil production reached 1 million tons, with more than three years alone built into a modern large oil and gas fields in deep desert.
Discovered shunbei oil and gas field and achieved 85% success rate in exploration
The discovery of shunbei oil and gas field is the third milestone in the development history of sinopec northwest oilfield after the breakthrough of shashen 2 well and the development of tahe oilfield.As a new type of reservoir, shunbei oil and gas field covers an area of about 20,000 square kilometers, with an average buried depth of 7,300 meters and the deepest depth of 8,600 meters, making it one of the deepest reservoirs in the world.
In 2011, the research team of northwest oilfield first focused on the shunbei area, broke through the traditional petroleum theory that there was no condensate below 8,000 meters, and deployed the shunbei 1 well.Based on 3d seismic and using velocity modeling and imaging technology, researchers established the formation data volume model in shunbei block, and discovered huge oil and gas reserves.In 2015, the first appraisal well of shunbei 1-1h deployed by scientific researchers in shunbei block was tested for production.Subsequently, six rolling evaluation Wells were deployed at fault no. 1, each producing more than 100 tons of oil per day.In 2016, sinopec announced the discovery of shunbei oil and gas field, which has explored 18 fault zones with rich integrated reservoirs.
Under the support of the national major project and the pilot project of the group company, a reservoir forming mode of "Cambrian hydrocarbon supply, vertical transport, late accumulation, fault control and enrichment" has been established in the northwest oilfield, enabling the main fault zone to control storage, accumulation and accumulation.Based on the fine identification and carving technology of carbonate rock seam and cave body, scientific researchers have worked hard to form the six-determination method of fracture description of "fixed mode, fixed response, fixed time, fixed primary and secondary, fixed type and fixed scale", and used the "three-dimensional engraving method" to gradually remove oil-free strata in three-dimensional space with different methods, so as to accurately search for oil reservoirs.
In 2017, the shunbei no. 5 well produced 150 tons of oil per day, and important breakthroughs were made in the exploration of the shunbei no. 5 fault zone, further verifying the validity of the fissure and cavern hydrocarbon accumulation theory of Paleozoic ultra-deep Marine carbonate rocks in tarim basin developed independently in northwest oilfield.Shunbei no. 5 well is located in the north of no. 5 fault. After the breakthrough, rolling evaluation Wells are deployed in sections in northwest oilfield.In 2018, the shunbei 51X well deployed in the middle section of fault no. 5 produced 120 tons of oil per day, revealing good exploration and development prospects in the middle section and south section of fault no. 5.
Currently, the success rate of international exploration is about 30% on average. Since the discovery of shunbei oil and gas field was announced in 2016, the success rate of exploration has reached 85%.By the end of 2018, shunbei oil and gas field had accumulated tertiary oil reserves of 273 million tons, laying a solid resource foundation for the construction of large oil and gas fields of 10 million tons.
We will build production capacity and increase crude oil output at a high speed
After the major exploration breakthrough in shunbei area, the large-scale development of shunbei oil and gas field began.In 2016, six Wells such as shunbei 1-2h achieved high production successively.So far, in the construction of 1 million tons of production capacity in shunbei, 19 Wells have been put into production, 10 Wells are being drilled, 4 Wells are being constructed before drilling, 10 Wells are to be drilled before drilling, and 25 Wells are to be deployed.
According to the principle of "integrated exploration, development and ground deployment, and phased development in different zones", the northwest oilfield has steadily promoted the efficient exploration and development of shunbei oil and gas field.From 2016 to 2018, shunbei oil and gas exploration and development continued to extend southward, leaving the east and west wings, deepening the understanding of accumulation and enrichment law, and expanding exploration and development achievements.The oil and gas management department of yuanshunbei has preliminarily established the monitoring standard of fault solution reservoir performance.Based on the concept models of four types of storage collectives, the reasonable recovery rates of different types of storage collectives are explored.Research on the mechanism of asphaltene precipitation and deposition has been carried out.The number of Wells in shunbei oil and gas field increased from 7 to 31, the daily output increased from 105 tons to 2,090 tons, and the annual output increased from 34,700 tons to 700,000 tons. The production capacity construction and crude oil output increased by an annual rate of 300,000 tons respectively.
In the development of shunbei oil and gas field, the northwest oilfield overcomes the difficulties such as imperfect supporting facilities and insufficient support forces in the new area, lean management, reform and innovation, stimulation of vitality and improvement of efficiency.
In order to strengthen the management of new Wells, the former shunbei oil and gas management department has refined the production plan of new Wells to day and hour.The departments of reservoir research, engineering technology, production and operation, power supply and material supply cooperate and follow up 24 hours a day to ensure seamless connection of all aspects from well location deployment, program design, drilling operation to wellhead installation.
Create a new management system with fewer personnel and higher efficiency
At the beginning of the exploration and development of shunbei oil and gas field, the northwest oil field, according to the construction requirements of the oil company, focused on creating a new management system with few employees, high efficiency and good benefits.
The original management department of shunbei oil and gas with 20 employees introduced professional support and support team, innovatively constructed management structure of management department + contractor + support team, formed a management mechanism of project + specialization + marketization + intelligence, and created a high-quality development mode of shunbei by optimizing the allocation of resources in the market.In 2017, the daily output of shunbei oil and gas field exceeded 1,000 tons.In 2018, profits increased 1.5 times year-on-year;The first quarter of 2019 produced 188,000 tons of oil, an increase of 95% year-on-year.
In 2019, to adapt to the developing situation of shun north field scale, promote the management to a new level, the northwest oilfield decision according to "the factory - reservoir management administrative zone" established two level architecture of 4th oil recovery plant, exploration for director responsibility system, by focusing on its main business to focus on technology and management, do the real reservoir operation management, outstanding elite efficient, open autonomy, competition in the market, attract resources, the use of resources, to ensure efficient operation.
At present, the number of operation and management personnel of the fourth oil production plant is 35. There are three virtualization management centers, namely, safety production center, technology management center and comprehensive management center.Three oil and gas production sites are set up by region, and 21 managers are dispatched to the site.The no.4 oil production plant with 56 employees is the youngest oil production plant of sinopec, with the least personnel and the highest efficiency per capita.