The first use of the acidification and plugging removal process of the immovable pipe string in Zhongyuan Oilfield was successful

China Petroleum & Chemical News.
com "Currently, Well Wen 203-13 has seen the effect of increasing oil.
Compared with the previous measures, the daily increase of 11 cubic meters of liquid, 2 tons of daily oil increase, and 3.
5% drop in water cut
.
" July 22, Petroleum Engineering Technology Research Zhu Gongshun, a staff member of the Acidizing Process Group of the Oil and Gas Reservoir Protection Technology Research Center of the Academy, received a report from the Wenliu Oil Production Plant on Well Wen 203-13, which marked the first successful application of the immovable string acidizing and plugging removal process in an oil field

In recent years, under the increasingly severe production situation and continuously compressed production costs, conventional measures have low efficiency, and oil fields urgently need to find low-input production stabilization measures; this year, due to the construction of gas storage capacity, the oil field operation team is tight
.
Therefore, in the era of low oil prices, the development of immovable pipe string acidification and plugging removal technology is an effective way to reduce operating costs, shorten the production cycle, and provide technical support for low-cost oilfield development

Acidification is a widely used stimulation measure to relieve formation damage in the near-well zone of an oil well
.
The conventional acidification process has shortcomings such as long occupation period, high operation cost, and environmental pollution

According to Yang Jie, head of the acidification process group of the Oil and Gas Reservoir Protection Technology Research Center of the Petroleum Engineering Technology Research Institute, the key technology of the process is to solve the problem of residual acid corrosion of pumps, tubing, and sucker rods
.
To this end, in order to make the acidification and plugging removal process of the immovable pipe string meet the requirements of field application, from the beginning of May, the Institute of Petroleum Engineering Technology started with key technologies to conduct research on the process

From July 12th to 13th, more than 20 people, including the Oil and Gas Reservoir Protection Technology Research Center of the Petroleum Engineering Technology Research Institute, Wenliu Oil Production Plant Process Office, operation team, oil production area, special vehicles, and feeding units, braved the extreme heat The well was tested for squeezing and plugging removal.
25 cubic meters of acid solution, 35 cubic meters of replacement fluid, and 150 cubic meters of high-efficiency washing fluid were injected.
The well resumed operation at 12 noon on the 14th
.
According to the analysis of the work diagram, the fluid increase of the well after the resumption of construction is more than 10 cubic meters

"In the past few days, we are applying this technology in Well Wen 88-16 and Well Wen 79-Side 215.
In the
next step, the oilfield will also strengthen the technical research on this technology, and strive to apply this technology in more wells, which is a low-cost oil field.
Cost development provides technical support

(Wang Yuan)