my country's first proven shale oil field with over 1 billion tons

The scene of Hua H50 platform in Qingcheng shale oil field, Changqing Oilfield

China National Petroleum Corporation Changqing Oilfield announced on June 20 that after more than two years of concentrated efforts, Changqing Oilfield has achieved significant results in Chang 7 petroleum exploration in the Ordos Basin, with proven geological reserves of over 1 billion tons of shale oil.
The integrated large oil field has become the largest shale oil large oil field with the largest proven reserves in China
.

PetroChina has successively made major discoveries and breakthroughs in new fields of shale oil and gas in the past three years
.
Among them, the shale oil exploration in the Ordos Basin has been reported frequently.
The Changqing Oilfield made a major breakthrough in oil exploration in the Qingcheng area in 2019.
The proved shale oil reserves were 359 million tons.

Changqing Oilfield Qingcheng Shale Oil Big Oilfield Hua H60 Platform

The surface of the Qingcheng shale oil field is covered by thick loess in the loess plateau, with ravines vertical and horizontal, and seismic exploration, drilling and fracturing are very difficult
.
At present, the proven oil reserves have accumulated to 1.

Since 2011, Changqing Oilfield has focused on large-scale oil and gas production, and has taken the lead in developing unconventional petroleum exploration geological theory innovation, forward-looking technical research and horizontal well development tests in the basin, and continued to deepen the tightness and accumulation mechanism of shale oil reservoirs.
Based on the understanding of the enrichment law, the study established the “four-control” enrichment model of the Chang 7 intra-source reservoir, established the theory of source-reservoir symbiosis in the continental shale strata, and revealed for the first time that large inland freshwater lake basins are rich in shale.
The formation mechanism of organic matter created a new mode of accumulation
.
After ten years of hard work, Changqing Oilfield has finally opened up the treasure house of continental shale oil resources and won China’s first "Big Mac" of shale oil with proven reserves of over 1 billion tons

Fracturing construction site of Qingcheng shale oil field in Changqing Oilfield

In accordance with PetroChina's "high-quality, high-tech, high-level, and high-speed" requirements for shale oil exploration and development, Changqing Oilfield has overcome the multi-disciplinary "sweet spot" optimization technology, horizontal well cluster layout, three-dimensional horizontal well optimized and fast drilling , Well construction technology, long horizontal section subdivision cutting volume fracturing and a series of "stuck neck" technical problems, created the world's economic and effective exploration and development miracle of continental shale oil under the background of low international oil prices
.
Since 2018, 504 horizontal wells have been drilled and 277 horizontal wells have been put into production.