1.268 billion tons! Found another "Daqing" under Daqing, a major strategy

Daqing has added a billion-ton large oil field!

On August 25, PetroChina announced that the Daqing Oilfield discovered a predicted geological reserve of 1.
268 billion tons of shale oil, marking a major strategic breakthrough in China's shale oil exploration and development
.

The dream of several generations of Daqing Petroleum people to "find another Daqing under Daqing" has come true

According to reports, the key exploration wells deployed in Daqing Oilfield such as Guye Youping 1, Yingye 1H, and Guye 2HC have produced more than 30 cubic meters of oil per day and have stable test production.
Among them, the Guye Youping 1 well has seen oil production for more than 500 days.
, The cumulative production of crude oil is more than 6,000 tons, and the cumulative production of oil and gas equivalent is nearly 10,000 tons, achieving a major strategic breakthrough in continental shale oil in the Songliao Basin
.

On the plane, 43 vertical wells have produced oil, and 5 horizontal wells have achieved high yields.

Drilling site of Guyeyouping 1 test area in Daqing Oilfield
.

Photo by Wang Yanlu

What breakthroughs have been made in theory?

A major strategic breakthrough in the exploration of Gulong shale oil in the Daqing Oilfield has opened a new round of high-tech battles
.

The new battle of Gulong shale oil is not only a major theoretical breakthrough, but also a systematic integration.

Live screenshots
.

Science and Technology Daily reporter Li Liyun asked questions at the press conference

"These breakthroughs have benefited from the Daqing Oilfield's fine tradition of promoting the'Three Old and Four Strict'; the keen sense of science of Daqing researchers; the effective organization of the integration of scientific research and production; and the integration of Daqing Oilfield.
At the
press conference, He Wenyuan, deputy general manager and chief geologist of Daqing Oilfield Co.

, Ltd.

　　He said that the new battle of Gulong shale oil is a major theoretical breakthrough and systematic integration
.

First of all, four breakthroughs have been made in theoretical understanding

• It was discovered that the Gulong shale has a fractured pore reservoir system controlled by shale, breaking through the traditional understanding of poor physical properties of shale reservoirs;

• It was discovered that high-clay shale is integrated with source and storage and has good oil-bearing properties, breaking through the traditional understanding that shale oil mainly occurs in sandstone and carbonate interbeds;

• It is discovered that the Gulong shale has a wide oil generation window, and the high-maturity stage can still generate liquid hydrocarbons, breaking through the traditional understanding that Ro (source rock maturity) is greater than 1.
  3% and is mainly gas;

• The "death line" of the water-sensitive mineral montmorillonite was discovered, breaking through the traditional understanding of poor compressibility of high clay shale
  .
  

　　These breakthroughs realized the leap from "generating" oil from continental shale to "producing" oil from continental shale, and realized the leap from classical petroleum geology migration and accumulation to in-situ accumulation of high-organic shale.

.

　　What major progress has been made in key technologies?

　　"Secondly, significant progress has been made in key engineering technology
.

" He Wenyuan told reporters that the supporting drilling speed-up technology template has increased the length of the horizontal section from 1500 meters to 2500 meters, and the drilling cycle has been shortened from 113 days to 18.

　　Through the exploration of production systems such as controlled pressure release and early pumping down, the Guyeyouping 1 and Songyeyou 1HF wells have seen oil production for more than a year and have been running smoothly, fully demonstrating that Daqing Gulong shale oil has a good stable production capacity.

.

At the same time, we must also objectively recognize that, as an unconventional resource type, exploration and development of continental shale oil still faces a series of new challenges in theories, technologies, costs, and benefits.

　　What is the scientific significance?

　　" The successful practice of Gulong shale oil marks the Songliao Basin's entry into an unconventional era and is an important material basis for the long-term stable production of Daqing Oilfield
.
Academicians and experts believe that Gulong shale oil has great scientific, economic, industrial and social significance.
And demonstration leading significance
.
” said Zhu Guowen, Secretary of the Party Committee of Daqing Oilfield and Executive Director of Daqing Oilfield Co.
, Ltd.
(Daqing Petroleum Administration Co.
, Ltd.
)
.

　　In terms of scientific significance, it will achieve a theoretical breakthrough from "generating" oil from continental shale to "producing" oil from continental shale;

　　In terms of economic significance, it will get rid of the imbalance of storage and production in old oilfields and achieve an increase in the total scale of oil and gas;

　　In terms of industrial significance, it will drive the leapfrog development of Daqing's upstream and downstream integrated ethylene industry chain value chain;

　　In terms of social significance, it will help Daqing strive to become the leader in the transformation and upgrading of resource-based cities in the country;

　　In terms of demonstration and leading significance, it will promote the continental shale oil and gas revolution in China and affect the development of global shale oil and gas
.

　　Well Ping’an 1 in the Sichuan-Chongqing exploration area of ​​the oil field has obtained a high-yield gas flow of over 100 cubic meters of oil and 100,000 cubic meters of gas in the Jurassic Liangshan Formation shale test.
This is the ancient dragon shale oil viewpoint and method.
The specific practice and successful replication
.

　　What is the expected output?

　　Daqing Oilfield is the largest oil production base on land in China.
It has been explored and developed for more than 60 years, and has produced more than 2.
4 billion tons of crude oil over the past 60 years
.
Facing the severe challenges of unbalanced oilfield storage and production and difficulty in stabilizing production, we marched into the shale oil of the Qingshankou Formation in the source, strengthened the study of shale oil enrichment rules and enrichment layer evaluation, as well as horizontal well fracturing to increase production, and achieved shale oil Major innovations in in-situ accumulation theory, major breakthroughs in key engineering technologies, and major achievements in exploration practice
.

Large-scale fracturing construction site
.
Photo by Yin Dingbin

　　A major strategic breakthrough in the exploration of Gulong shale oil in the Daqing Oilfield of PetroChina is a new milestone in the exploration and development of the Songliao Basin.
It demonstrates the huge development space and potential of shale oil in the Songliao Basin, and realizes "found another large oil field under Daqing.
" Dream
.

　　In the next step, Daqing Oilfield will regard Gulong shale oil as an important strategic area, fully implement the new development concept, and speed up various tasks
.
100 wells will be implemented in 2021, 58 wells have been drilled, 27 wells have been tested, 25 wells have seen oil, and 17 wells have obtained industrial oil and gas flow
.
According to the new model of "project management, market operation, platform-based well deployment, factory operation, intelligent management and control, and low-carbon development", the development pilot test is being carried out, and the Daqing Gulong continental shale oil national demonstration zone is actively promoted Construction
.
The "14th Five-Year Plan" will add 1 billion tons of proven oil reserves, and the annual output of shale oil will reach more than 1 million tons
.