Performance Evaluation and Application of Silyl Modified Sand Control Agent in Fine-siltstone Reservoir
Fine particle movement is the main reason that affects the development effect of fine-siltstone reser-voir.Conventional treatments are incapable of controlling fine particle movement.In order to improve the per-formance of the agent to stabilize the reservoir particles,a new sand control agent modified by silyl was designed on the basis of computer molecular simulation.The structure char acterization and properties of the synthesized sand control agent were carried out.The new sand control agent system contains functional groups such as amide group and silyl group,which adsorb with the reservoir particles through hydrogen bond and covalent bond to form a stable and uniform molecular film,and fix the formation fine sand or clay particles in situ.The evaluation of the new style sand control agent shows that the agent has good sand control effect on the particles with different particle sizes.The erosion resistance of the agent reaches 8 500 mL/h,and is much higher than that of common sand inhibitor 900 mL/h The effect of in-situ fixing fines in deep reservoirs is remarkable.The new style sand control agent system has been used in 60 wells successfully and the sand control effect is obvious.This technolo-gy has promotion and demonstration significance in sandstone reservoirs nationwide.
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