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Recently, the Dongxin operation area of Shengli Oilfield Downhole Operation Center implemented chemical sand control modification on the Yong 8 Incline 95 Well, which has achieved a good production increase effect, making the well rejuvenated
.
Well Yong 8 Incline 95 is an old well in the Yong'an management area.
The production horizon is Sha 2 1-10.
It is a loose sandstone reservoir, which is easy to produce sand and needs sand control to restore productivity
.
The well has low fluid volume and not serious sand production, and it is silty fine sand
In order to ensure the effect of sand control, the construction parameters are optimized, and the sand control radius is determined to be 2.
5-3 meters according to the production capacity of the oil well and the law of the pressure drop funnel, which can meet the sand control demand
.
At the same time, according to the physical property data of the block, in order to improve the affected area and utilization efficiency, with the help of factors such as effective perforation thickness, porosity, permeability and shale content of the oil layer, the amount of sand inhibitor is determined to be 40 cubic meters and the concentration is 12%
During on-site construction, first use oil layer cleaning agent to clean dead oil near the well to prevent it from being squeezed into the deep formation again, blocking the oil flow channel, and affecting the later production capacity
.
Then squeeze in the sand inhibitor, and use the polyhydroxyl in its molecular structure to cement the hydroxyl on the surface of the formation to form a hydrogen bond.
The practice of chemical sand control in Well Yong 8 Incline 95 and put into production is rejuvenated, which has important reference significance for the management of light sand production reservoirs in Dongxin Oil Region
(Bi Guoping and Gou Xiufeng)
