Face to face丨60,080,800 tons!

How does Changqing Oilfield repeatedly create miracles of oil and gas development?

  2020 at 10:00 on December 27, Changqing Oilfield in China's oil production on the command center digital display, oil and gas equivalent production reached

60.0008 million tons

, of which crude oil production

24.518 million tons

, production of natural gas

44.531 billion cubic meters

, which

marks the With the birth

of China

's first super-large self-contained oil and gas field with an annual output of 60 million tons

, China's petroleum industry has reached a new milestone.

  "Face to Face" interviewed Fu Suotang, Secretary of the Party Committee of Changqing Oilfield, introducing new technologies and revolutions in petroleum exploration.

"Squeeze" oil and gas from the "whetstone"

50 years of research and control of basin oil and gas resources initiative

  The oil and gas exploration and development construction of Changqing Oilfield

began in 1970,

with a total exploration area of ​​approximately

370,000 square kilometers

.

The Ordos Basin is rich in oil and gas resources, but the geological conditions are complex, the resource endowment is poor, and unconventional oil and gas dominate. It is a typical "

low permeability, low pressure, and low abundance

" oil and gas field. Exploration and development are a world-class problem.

Until the end of 1979, the annual crude oil production of Changqing Oilfield exceeded 1 million tons, and it remained at this low level for a long time.

In 1981, Fu Suotang, the current party secretary of PetroChina Changqing Oilfield, entered the drilling team of Changqing Oilfield.

Fu Suotang:

  Conditions were very difficult at that time.

Accommodation, living in a tent.

Eating, because the well team is a little far away from the living base, if it rains or snows and the road is slippery, we can only bring dry food.

At that time, there were no holidays including the Spring Festival.

  The rocks in the oil and gas-bearing layers of the Changqing Oilfield are highly dense, and are called

"whetstones" that

do not enter

.

Some experts vividly likened that if the oil and gas reservoirs in the Middle East are compared to highways, then the oil and gas reservoirs in Changqing are like the small road.

How to "squeeze" out oil and gas resources from the "whetstone"?

It tests the resilience and technological capabilities of Changqing Petroleum people.

  Starting from a low-permeability oil field, breaking through ultra-low permeability, fighting ultra-low permeability, liberating tight gas, and realizing the effective development of shale oil on a large scale, Changqing Oilfield has undergone

nearly 50 years

of basic research and scientific research and developed rapid acquisition The five original theoretical understandings of oil and gas resources have finally gradually taken control of the initiative in basin oil and gas resources.

reporter:

  Wasn't it solved by introducing ready-made technology from abroad?

Fu Suotang:

  Probably, but it cannot solve my problem, especially the superposition of low pressure, low permeability, and low abundance. Such complex oil reservoirs are rarely seen in the world, and rarely seen in China. Only in the Ordos Basin, the unique This one.

Technological progress and technological innovation must be aimed at one's own problems and form applicable technologies to have vitality.

  Focusing on the "stuck neck" problem,

creating a record for the longest horizontal section of a 4088-meter inland oil well

  Looking for large oil fields in areas with extremely poor geological conditions is tantamount to finding a needle in a haystack.

The Xifeng Oilfield with reserves of more than 400 million tons has experienced three failures in exploration; the Jiyuan Oilfield with 500 million tons of reserves has failed five times; the exploration of the 1 billion-ton Qingcheng shale oil field lasted nearly 20 years.

However, after unremitting technological research, Changqing people have successively found 4 large oil fields with proven reserves of more than 1 billion tons, including North Shaanxi and Huaqing, and won 3 large oil fields with proven reserves of more than 1 trillion cubic meters, including Sulige. Gas fields continue to accumulate late-comer advantages in the ability to obtain resources and expand the broad space for oil and gas development.

  In addition, Changqing Oilfield focused on the "stuck neck" problem, focused on key core technologies and "stuck neck" technologies, and formed five series of 18 supporting technologies.

Among them, shale oil ultra-long horizontal section horizontal well drilling technology maximizes the degree of reserves production.

The Hua H50-7 well applied this technology to complete 4088-meter ultra-long horizontal section drilling, setting a record for the longest horizontal section of a domestic onshore oil well.

Create a recyclable "green oil field"

Green coverage rate of oil and gas development area reaches 95%

  Under the new situation where China vigorously advocates low-carbon transition, Changqing Oilfield has continuously promoted the transformation of development mode, turning the concept of resource conservation into the reality of high-quality development of oilfields, and has saved

more than 300,000 mu of

land in the past decade

.

The oil and gas development area adds

3 million square meters

of green

plants every year

, and the green coverage rate reaches

95%

.

reporter:

  Many people worry that when a large amount of oil and gas is developed, it may have an impact on the surface and deep geology?

Fu Suotang:

  Of course, first, we need to be precise and precise in design, and the design work must be done well. The distribution of the tubing string we run to the formation and the cementing quality must have requirements for the wellbore.

Second, the liquid we extract must be recycled and processed without polluting the soil and water system.

By planting grass for this kind of grass and planting for this tree, we are now fulfilling zero emissions and zero pollution.

For example, we have very little water in the loess plateau, unlike other basins where water comes out as soon as a well is drilled. Our water is repeatedly stored in the ditch, and we can fracturing if we store enough.

A single well now generally requires 30,000 cubic meters of water for fracturing, which requires a lot of water.

Through the integrated design of surface engineering, we adhere to the recycling of water resources, which not only reduces the waste of water resources, but also reduces our fracturing fluid treatment costs, and realizes green and recycling.

Breaking through 60 million tons of

"three low" oil and gas reservoirs burst with huge energy

  Changqing Oilfield is the fastest increasing oilfield in my country since the new century.

From 2007 to 2013, the oil and gas output equivalent of Changqing Oilfield increased from 20 million tons per year to 50 million tons.

In 2012, Changqing Oilfield became the largest oil and gas field in my country.

Beginning in 2018, Changqing Oilfield continued to increase its exploration and development efforts, promoted the accelerated development of the second time, and explored the economic development and construction model of "large well clusters, horizontal wells, composite, three-dimensional, and industrialized", so that the "three low" oil and gas Tibet has exploded with tremendous energy, increasing its annual output of 53 million tons by 7 million tons.

In 2020, under the impact of the epidemic and low oil prices, a new historical record of 60 million tons will be created.

  After half a century of continuous development, the Changqing Oilfield has built a 60 million-ton super large oil and gas field under extremely difficult geological conditions with low permeability. This is a concentrated expression and epitome of the high-quality development of PetroChina.

The 60 million tons of Changqing Oilfield adds the confidence to ensure my country's energy security and plays an important strategic support role in building a new pattern of my country's energy security.

After 60 million tons

Can Changqing Oilfield reach new highs?

  As my country's largest natural gas production base and natural gas pipeline network hub center, it is responsible for undertaking central Asian and western gas sources, and it is responsible for gas supply tasks in more than 50 large and medium-sized cities, benefiting more than 400 million residents.

When Changqing Oilfield stood at the historical high of 60 million tons of oil and gas equivalent, people began to pay more attention to the future of this super large oil and gas field.

reporter:

  After breaking through 60 million tons, will it enter a relatively stable period?

Fu Suotang

:

  The development of Changqing Oilfield itself is not in the late stage. I think the development of this oilfield is still in the mid-life period.

Our next goal is to

maintain stable production on the basis of 70 million tons of oil and gas equivalent by the end of the 14th Five-Year Plan period, or 70 million tons, and stabilize production until 2050

.

Through the increase in output, we can improve our efficiency, and we can truly achieve our domestic oil and gas industry and fully benchmark against foreign oil companies.

  Reporter丨Gu Bing