The detailed geographical location of tight oil and gas fields in northern Shaanxi, then why is it said to be in Xin 'anbian?

Xin 'anbian, Northern Shaanxi —— Xin 'anbian Town, Dingbian County, Yulin City, Shaanxi Province.

The first tight oil field of 100 million tons in China was discovered in Xin 'anbian, northern Shaanxi.

On May 25, the reporter learned that Changqing Oilfield, which has made a major breakthrough in oil and gas exploration and development for many years, discovered the first large-scale tight oil field of 100 million tons in northern Shaanxi Jiyuan, marking the submission of 654.38 billion tons of proven geological reserves by tight oil, further consolidating the resource base of Changqing Oilfield with an annual output of 50 million tons.

Tight oil refers to the oil accumulation sandwiched in or close to the dense reservoir of high-quality source rock series without large-scale long-distance migration. Tight oil in Ordos Basin is rich in resources and has great potential for exploration and development. However, compared with previously developed ultra-low permeability and ultra-low permeability reservoirs, its reservoir-forming mechanism is more complicated, pore throat is thinner, pore matter content is higher, and exploration is more difficult.

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In recent years, Changqing Oilfield, whose oil-gas equivalent is increasing at a rate of 5 million tons per year, has turned its exploration target to more subtle tight oil reservoir areas and horizons in time, and actively increased the joint research of tight oil's geological theory and engineering technology.

By describing the temporal and spatial distribution of source rocks in detail, the "multi-body+waterway" sedimentary model and the "binary method" fracture prediction technology are introduced for the first time, and the key problems in the exploration and development technology in tight oil are overcome, so as to correctly understand the tight oil in Ordos Basin.

The optimization of exploration desserts in tight oil and Tibet, reservoir evaluation, rational formulation of technical policies for horizontal well development and selection of fracturing methods provide valuable geological basis, which promotes a major breakthrough in exploration of tight oil in Ordos Basin.

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On the basis of great achievements in exploration, Changqing Oilfield has adhered to the integration of exploration and development, and intensified the development test in tight oil. Starting from 20 1 1, by establishing three tight oil horizontal well volume fracturing test areas and 3

In the large-scale development test area of tight oil, the output of single well in tight oil has been significantly improved, and four key technologies, such as three-dimensional horizontal well drilling and "three-quality" logging evaluation, and a series of supporting technologies have been innovated one after another, which has promoted the "resource utilization" of tight oil.

The great changes from reserves to production and from production to benefit have played a good role in demonstrating and guiding the scientific exploration and development of tight oil in the same industry in China.