The
new station of Daqing oilfield nine plants outside the expansion block to big
415 two horizontal wells flowing. The
flowing, starting from the wear layer of the plant to carry out large-scale
horizontal well controlled fracturing test. May
10, two wells are still in the trial mining spray fishing oil production phase,
converted to an average of wells with crude oil production amounted to about 15
tons.
Since
there had been sprayed in the history of the Daqing Oilfield. Early
stage of development, the formation pressure, the Daqing Oilfield in the mining
state of flowing. Until
the late 1980s of the last century, the Daqing Oilfield turned to mechanical
recovery and the end of the mining era of self-flowing well. The
test site of the nine plants in oil production witnessed employees, two well
kept out spray "black gold".
Daqing
Oilfield has developed over half a century, especially in the thin oil layer
peripheral oilfields, why again from the spray? Test
of the responsible person, the better the large 415 foreign expansion block
reservoir conditions, either landscape or portrait, rich and connected
reservoir. Straight
wells flowing, simply hit the horizontal wells flowing, there must be a
technology that can be both vertical and horizontal direction, both directions
of the reservoir oil, was possible as at present from the spray phenomenon.
Horizontal
well controlled wear layer fracturing is such an aspect to take into account the
technology. Horizontal
wells across the reservoir and improve the technology of production per well. Its
advantage is that a hand horizontal large reservoir, but only hand to seize the
horizontal, but attend to the longitudinal, vertical reservoir losing out. Controlled
wear layer fracturing of horizontal wells is equivalent to lend the other hand,
vertical reservoir of oil to "squeeze" out. Such
vertical and horizontal communication, production per well is naturally have
been rising.
Aspect
to take into account the benefits In addition to spray the perfect embodiment
through self through the data show. The
test program shows that, if the development of vertical wells produce from the
spray phenomenon 165-94 - level 116 wells, well production is only 1.8 tons; If
using a conventional horizontal wells, well production could reach 7 tons;
horizontal wells The
development and application of large-scale wear layer fracturing process, the
stability of the program to calculate a single well can reach the final
production of 9 tons, and can be fully utilized geological reserves, will not
cause stock losses.
Horizontal
well controllable wear layer fracturing test is successful, further promotion
for the peripheral field of horizontal well technology to do a favorable
bedding. It
is understood that the China National Petroleum AG has been to open up
large-scale demonstration zone of horizontal wells in the oil extraction plant
Gu South area. Demonstration
area is a total of 103 wells, 22 wells in the use of such fracturing, has
entered the scene stage.