Enhanced production efficiency of tight oil by two production methods in Tuha Oilfield
China oil network news reporter was informed that in November 14th, three Tang Hu basin of Tuha oilfield 181H well can make the horse 56 more than a month of production flowing after fracturing, Nissan 18.1 tons of oil, and further strengthen the tight oil section can make the fracturing of confidence, provide some new design ideas for the production of tight oil in the next step high quality and high efficiency.
Ma 56-181H well designed for the 7 segment and 26 cluster put into production, in order to improve the tight oil "L" curve of "artificial fracturing" yield and "sweet" production, technical personnel decided that the well was put into production two times fracturing. In June 15th this year to 22, the speed of drilling bridge plug is divided into 4 sections each section before fracturing, fracturing in front of 2000 cubic meters of water re fracturing fluid into the well, the cumulative amount of 12 thousand and 189 cubic meters; put into operation in June 24th, the initial oil production of 35 tons, to October 1st, the cumulative oil production of 2090 tons; in October 2nd two production, with 5 layers of temporary plugging fracturing to paragraph 7, before the pressure of feeding water to 6040 cubic meters, 2350 cubic meters of fracturing fluid, fracturing after soaking for 2 days to see oil wells, the wells 2 mm nozzle sprinkler, Nissan 30 tons of oil.
The two production method not only improves the decline form of tight oil "L" shape production curve, improves the recovery rate of single well, but also saves 500 thousand yuan of average single well compared with conventional fracturing. At present, the tight oil can be accumulated to repair 20 wells, saving 10 million yuan.
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