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Recently, at the project acceptance appraisal meeting organized by the Ministry of Science and Technology of China Petrochemical Corporation, the high water-cut stage multi-stage stable and long-lasting sand control technology research project undertaken by the Sand Control Institute of Shengli Oilfield Petroleum Engineering Technology Research Institute passed the acceptance appraisal of the expert group.
As a whole, it has reached the international leading level
.
In response to the problems of increased fluid production intensity, severe sand production deficit, rapid liquid volume decline, and short sand control effective period in the late stage of high water-cut development, researchers have launched multi-stage stable and long-acting sand control technology research in high water-cut period, and studied storage in high water-cut period.
Layer instability mechanism, establish dynamic sand production prediction model, and realize quantitative description of dynamic sand production radius and sand production rate
.
At the same time, the center developed in-situ microparticle stabilizers and low-viscosity active sand-fixing agents for deep erosion-resistant reservoirs, which more than doubled the sand stabilization capacity and increased the sand-fixing strength by more than 50%, effectively solving deep particles in high-water-cut loose sandstone reservoirs.
Stable bottleneck
.
In addition, innovative research and development of high-density filling tools, agglomeration-stable sand-carrying liquid system and hierarchical filling parameter optimization methods have established multi-level stable sand control barriers to increase seepage capacity by more than 30%; safe and efficient organic peroxide depolymerization agents and Packing gravel, sand control screen pipe anti-polymer adsorption system, provides strong support for high-efficiency sand control in polymer flooding reservoirs
The research results were promoted and applied in large-scale mines in Shengli Oilfield.
(Ren Houyi and Gao Xuefeng)