Shengli Oilfield's enhanced film-forming and sand control technology is leading internationally

Recently, the LPL58-X55 well of Shengli Oilfield Linpan Oil Production Plant successfully implemented a new technology.
The increase in oil has risen sharply.
The effect has been praised by the oil production plant
.

This technology developed by researchers from the Sand Control Institute of Shengli Petroleum Engineering Technology Research Institute is called "Enhanced Film Forming Sand Control and Enhanced Injection Technology".
The core is an enhanced film-forming sand control agent.
This sand control agent breaks the foreign monopoly and achieves suppression.
The cross-generational promotion in the sand agent industry has reached the international leading level after the project has been appraised
.

Foreign prices are expensive and restrict our country

Sand control and increased injection technology are important technical guarantees for the benefit and stable production of oilfields.
However, in the later stage of development, the instability of the reservoir increases, which seriously affects the effect of sand control and increased injection, and thus restricts the further improvement of development benefits
.

Taking a sand control well as an example, the intensity of the fluid production increases and the migration of fine particles in the formation is intensified, which will inevitably destroy the reservoir framework, resulting in a decline in productivity, and it is difficult to recover until the well is shut in

Such problems are most likely to occur in oil reservoirs after polymer injection, offshore strong production blocks, and large-displacement extraction wells; for injection-enhancing wells, small-molecule injection-enhancing agents are often used, which have weak adsorption capacity on the pore surface , Can only achieve stable flooding effect with long-term injection.
The amount of drugs used is large, the cost is high, and it is difficult to sustain for a long time
.

　　Foreign countries are advanced in theoretical research in this area, and several replacement sand control agents have been developed.
Nearly a thousand well sites have been used.
The theory is novel and the field implementation effect is good
.

For example, Witford's representative technology "Zeta potential sand stabilizer technology" has been successfully promoted and applied to more than 250 wells in two years.

　　In view of the current domestic cationic polymer sand inhibitors with poor erosion resistance, short validity period, and difficulty in meeting the requirements for liquid extraction and stable production after sand control, the scientific researchers of the Sand Control Institute are self-reliant and determined to develop their own "fist products".
The field cultivation subject "Research on Strengthening of Film Formation and Sand Control and Injection Technology" was launched
.

　　Strengthening the film-forming design is the only way

　　At present, the more commonly used cationic polymer sand inhibitors have a single water-soluble film or jelly film.
The main disadvantage is that the water-soluble film is not resistant to erosion, and the jelly film is easy to age in the reservoir.
The adsorption capacity is weak, and the validity period is less than 1 year
.

After a lot of investigation, analysis and experimentation, the contradiction was concentrated on the molecular structure design, which resulted in poor film formation quality due to design reasons

　　Seizing the main contradiction, scientific researchers liberated their minds, innovated and carried out novel molecular structure designs, and transformed the commonly used single aqueous membrane into a double-base non-aqueous mucosa with both hydrophobic and hydrophilic groups
.

The new mucosa finally formed after repeated optimization has the characteristics of instant film formation and precipitation in water, ultra-thin film formation, erosion resistance, and high adhesion, which provides a solid guarantee for the next step of deepening the research of this technology

　　The final "enhanced film formation" technology, through the precipitation of ultra-thin polymer hydrophobic mucosa, changes the pore surface characteristics, and achieves the purpose of immobilizing formation particles in situ
.

The new film-forming technology is equivalent to putting on a layer of "protective raincoat" for the loose oil layer, and its erosion resistance is more than 6000 ml/h.

　　The LPL58-X55 well mentioned at the beginning of the article applied this new technology.
Before the measures, the daily production of fluid was 0.
6 tons and the daily oil production was 0.
2 tons; after the measures, the daily production of fluid soared to 6.
7 tons, and the daily oil production was 3.
1 tons, which was an increase of more than 15 times
.

　　From the early days of the door to the doorstep now to break the threshold

　　"When the initial effect has not yet manifested, promotion is very troublesome
.

" said Wei Tao, secretary of the Party branch and deputy manager of the Sand Control Institute.

　　Wei Tao still remembers that call, a management area, barely managed a well, after the results came out, he apologized anxiously and asked for five more wells
.

The R&D personnel said: "The characteristics of instant film formation in the water of the new technology determines that it is not only suitable for sand control and sand control, but also can be widely used in extending the stable production period of oil wells, improving the acidification effect, formation pretreatment, and sand control failure remediation.

　　The art of using immovable string casing acidification sand control in well LPTA1-X24 in Linpan Oilfield has an immediate effect.
Before the measure, the daily production of fluid was 4 tons, the daily oil production was 3 tons, and the daily gas production was 71 cubic meters; after the measure, the daily production fluid was nearly 10 tons, and the daily oil production was 6.
3 tons.
, With a daily gas production of 150 cubic meters, achieving three doublings of daily liquid production, daily oil production, and daily gas production, demonstrating the huge application potential of the enhanced film-forming sand control agent in other petroleum engineering fields
.

　　The new technology is simple in process and low in construction cost; second, it has outstanding sand control effect and strong recovery capacity of single well; third, it is easy to popularize and replicate, and has great potential for improving block benefits; fourth, it is environmentally friendly and harmless, providing a boost for oilfields.
A strong technical guarantee
.

When the effects of multiple wells and multiple blocks are highlighted, the current demand has doubled

　　Since the beginning of this year, the new technology has been applied to 13 wells in various fields, and the aroma of wine is still being fermented
.

　　(Ren Houyi Song Jinbo)