Qinghai oil field gas development, a "Sebei mode"
Qinghai oil field gas development, a "Sebei mode"
When shy? Ning? Blue piping into the development of the first Western country to implement key projects, opened a prelude to natural gas, the China Petroleum and gas field has also emerged the Qaidam Basin. With the continued rapid rise of natural gas production, has a unique connotation of "Sebei mode" also brought out more and more beautiful luster.
One revelation: independent innovation and foster technology features to break a world-class development problems, technology creates a high-efficiency
Gas field is one of the country four air area, is currently the world's largest discovered in the Quaternary biogenic gas pools. Gas field production for the fourth layer of muddy siltstone reservoirs, high mud content, the rock is very bad, very loose formation, production of formation sand serious, well production is low, severely limits the productivity of gas wells in the play and yield improvement. Gas field reservoirs loose sand and sand control problem is a difficult problem, has been plagued with high efficiency gas field development.
There are no valuable experience, Qinghai Oilfield no one else dared to take the road traveled, courage rose to the challenge of world-class problems. "15" period, sand technologies are developing rapidly, has launched a pipe mechanical sand, chemical sand and high pressure a packing sand and fiber composite fracturing sand and other technology test, and promote the use of a more adapted field geological characteristics of the high-pressure time filling sand and fiber technologies such as fracturing sand, gas sand control system is being completed, technology has improved continuously, out of a gas field production to meet the needs of sand road to success.
Implementation of the sand, the gas production increased to varying degrees, the average well production rate of 30% increase over sand over a maximum period of 800 days. In particular, high pressure filling sand sand craft and fiber technology, "15" period from scratch, to achieve the scale of application, on loose sandstone sand Sebei breakthrough results. As of 2005, has a total of 48 wells, 100% efficiency measures, operating a success rate of 92.3%, the single well value-added output up to 188%, the average increase in value of wells reached 56%.
Since 2001, the gas field to carry out research to improve well production test, the current form of eight mature supporting technologies in the domestic and world leading position, for the effective development of gas field provides a strong technical support.
Commingling the main technology, many sub-mining technology, oil and cover with the mining and so on. In the hierarchical mining technology, the gas field trip carried out pilot exploitation of column three, and three wells in the new test the success of Shibuya. Well measures of the well yield a significant increase in the highest yield test up to 200,000 cubic meters per day or more, are still stable at around 120,000 cubic meters per day, a good test results. Through test gas field 114 producing wells average well production increase of 1 million cubic meters, with significant economic benefits. "Gas field to improve gas well production" was awarded First Prize in Qinghai province science and technology.
Horizontal drilling can substantially increase oil and gas production, but the construction is difficult and high technology. In carrying out laboratory tests, and combined gas field geological characteristics on the basis of well-designed, in October 2005, Qinghai Oilfield has successfully hit the first gas field into horizontal wells?? Shibuya level 1 well, filled at home and abroad not a rock loose Quaternary strata horizontal wells successfully drilled into the blank, to resolve the Quaternary strata of the efficient development of osteoporosis has opened up new avenues. Put into operation, Shibuya gas production is flat on the 1st floor system with vertical wells yield more than 4 times. Subsequent drilling cycle astringent level 2 shortened to 14 days, creating a horizontal section of Qinghai Oilfield longest, the fastest drilling record.
Gas field in the world-class research problems journey, Qinghai Oilfield has also invented a number of high practical value of patented products.
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