The reporter learned from the Qinghai Oilfield Company of China National Petroleum Corporation on the 15th that Qinghai Oilfield recently successfully implemented 38-piece volume fracturing of 5 horizontal wells in the Yingxi Block, and accumulated oil increase was 17500 tons. Thus, this independent research and development The reservoir reformation technology has become the 'propeller' for increasing production and efficiency in the high-temperature, high-pressure, and high-salt oil reservoirs in the West.
According to the introduction of Qinghai Oilfield, the exploration area of 1,000 square kilometers in Hero Ridge is the main battlefield for the construction of a 10-million-ton plateau oil and gas field in Qinghai Oilfield in the next three years, while crude oil production in the West of the Block is the 'leader' for increasing production and efficiency. The high-temperature, high-pressure, high-salt 'three-high' characteristics of the Heroic Ridge Zhougao Reservoir began the development of reservoir reconstruction technology and achieved breakthroughs. In particular, the reservoir reconstruction in the West of the West has undergone acidification, acid pressure, and fracturing. In the development of the two phases, the technology of the reconstruction of vertical well + horizontal well volume fracturing reservoirs has been formed, and the fracturing control reserves of vertical wells have been achieved, and the benefits of horizontal wells have been double harvested.
At the same time, on the basis of summarizing the experience of fracturing reconstruction of tight oil in Zhaha Springs, the horizontal wells deepen the combination of engineering and geology, establish a three-dimensional geological model, adopt the 'geological and engineering integration' research ideas, and effectively combine 'geological sweets' and 'projects'. For desserts, two fracturing processes, 'naked eye packer' and 'casing slipper', are preferred, with volumetric fracturing of 'large liquid volume, large displacement, high front liquid ratio, slickwater + jelly' The idea is to maximize the contact between the artificial fracture and the reservoir. At the same time, in order to ensure the best reconstruction effect, the micro-seismic monitoring is used to monitor the fracture dynamics in real time and the fracturing construction parameters are adjusted in time.
In addition, Qinghai Oilfield also conducted horizontal horizontal well + volume fracturing tests to help the development of high efficiency in the west of the United Kingdom. The horizontal wells + volume fracturing was used in the Shiping 1 well. The total construction was 8 sections, the total liquid volume was 10,360,000 cubic meters, and 621 cubic meters of sand were added. In meters, the highest daily oil production rate after the implementation of technical means was 395 cubic meters, and the cumulative production exceeded 10,000 tons. Currently, Qinghai Oilfield has conducted 4 volume horizontal fracturing field tests in 28 horizontal wells in the Yingxi block, and 3 wells have obtained high-yield industrial oil. Flow, average single well output up to 190 tons in the initial stage after fracturing.
Qinghai Oilfield stated that a breakthrough has been made in the reconstruction technology of the horizontal well + volume fracturing reservoir in the West of the West, and a new model of horizontal well + volume fracturing development in the West of the West China Sea has been formed, which has further strengthened the oilfield's ability to increase the output of a single well by relying on horizontal well volume fracturing. confidence.
