"Stabilizing Changes and Increasing Africa"! Let the century-old oilfield go steady and far

Last year, the century-old Yanchang Oilfield successfully realized the scale of more than ten million tons "sixteen consecutive stable". On this basis, around the realization of "more than ten million tons of stable production for 30 years, and then build a hundred years of oilfield" the medium and long term stable production goal, oilfield company scientific research and judgment, grasp the near and seek a long way ahead, in the group company in 2023 half-yearly work conference gave the "stable and often increase the non-" the "Oilfield program".

"'Stabilize and increase non-conventional', meaning that one hand to stabilize the stock of conventional reservoirs, the other hand to increase the amount of unconventional reservoirs to be increased, often non-conventional and stabilize the oil, oil expansion." Gao Zhendong, general manager of the oilfield company, said that in recent years, with the development of the oilfield is constantly deepening, exploration and development gradually from shallow to deep, from favorable areas to the poor thin area, from conventional reservoirs to unconventional reservoirs change, "stable and non-conventional increase" is the current stage and the next period of sustainable development of the road.



So, how to play a good medium and long term stable production of this set of "combinations of punches", how to "stabilize" the extraction of conventional oil reservoirs? How to "increase" the extraction of unconventional oil reservoirs?



Rely on water injection to stabilize conventional oil



In September, the north of Shaanxi Province, high and cool, oilfield well area is surrounded by green, water injection and oil extraction work is equally busy. Into the apricot river oil extraction plant oil area, a water injection station, water supply station is speeding up the construction.



The plant is in the process of upgrading the water injection process, under construction is the 16th water injection station, there are six water supply station has been completed, 120 kilometers of water injection pipeline network laying. Responsible for site supervision of the staff to the reporter to calculate an account: the cost of investment of more than 12 million yuan, the overall optimization of the system pipeline network, measured in one year can save 15 million yuan of pouring fees, the year will be able to recover the investment costs.



After more than eight years of three consecutive rounds of "three years of water injection war", "calculate the benefits of the account, injection benefits of water, picking benefits of oil" concept, has been deeply rooted in the prolongation of the oil field each employee heart. Xingzichuan oil extraction plant, for example, since the water injection war, the plant water injection area increased by 55 square kilometers, the comprehensive rate of decline not only down and better than the industry I reservoir standards, water injection effect is obvious, the benefits are also gradually apparent, water injection cumulative increase of 131,000 tons of oil, which is the plant for eight consecutive years of steady production of more than 800,000 tons of crude oil where the secret lies.







As a matter of fact, a large part of the production of Yanchang Oilfield comes from conventional reservoirs, and these basic production mainly relies on the old wells, while the stable production of the old wells mainly relies on water injection.Since 2015, the oilfield has taken the initiative to change the development mode, significantly compressed the investment in new wells, paid close attention to the scientific and technological efficiency with the core of water injection, focused on the people, money and materials to water injection tilted, set up a water injection department to raise the level of management, the project system, and the style of the meeting to promote the development of water injection to replenish the stratum The project system and battle style promote the development of water injection, supplement the formation pressure and energy, relying on science and technology to increase reserves and stabilize production, reduce costs and increase efficiency. During the construction of nine fine water injection demonstration areas, and will be made into a class Ⅰ water injection area in the boutique water injection area, became the main stable production area of the oilfield, but also for the comprehensive promotion of the company's water injection work to play a demonstration role in driving.



After a long period of exploration and practice, extend the oilfield injection and mining well network and injection and mining correspondence tends to be perfect, after the fine adjustment of governance, water drive to effectively improve the degree of use, has formed a set of extension of the oilfield for the development of water injection technology management system, water injection to ensure ten million tons of stable production of "ballast" role to play an obvious.



This year is the oilfield company to promote "three years of fine water injection battle" the final year, the company adhere to the classification of governance, step by step to promote, targeted supplementation of stratum energy. i class area to speed up the creation of fine water injection demonstration area, ii class area focus on comprehensive adjustment of the governance, iii class area to explore diversified technology research, and at the same time to strengthen the stabilization and control of oil and water, At the same time, we have strengthened oil stabilization and water control, adjusted the management of injection and extraction, and other supporting technologies and processes, expanded the scale of water injection, and steadily increased the production and recovery rate of individual wells.



In addition, in recent years, the oilfield relies on water injection to effectively improve the formation energy, and most of the suspended wells have the conditions for resuming production and technological transformation to explore potential. Last year, the oilfield synthesized the potential and value of such wells, and timely launched the implementation of the "10,000 wells restoration project", categorized and lined up to accelerate its efforts to restore production, so that more shutdown wells can resume production and contribute to production through more advanced and applicable scientific and technological means. Up to now, more than 6,300 wells have been restored, contributing more than 240,000 tons of production in the same year. At the same time, 7514 wells of inefficient wells in the preferred water injection efficiency area have been technically reformed and dug up, increasing oil by more than 700,000 tons in the same year.