| Main reservoir in Block An201of Changqing Hujianshan oil Feild consists of C6layers. In2009, the development of water breakthrough soon happens, see water Wells at the end of2011accounted for19.6%of the total number of Wells which the25shut-in well water flooding. Through dynamic adjustment and water injection tracer detection, show that the NE direction of the large natural crack causes the direction of crack of the water, and not affected by water injection well to the group in other wells. So for chemical water shutoff profile control measures to block formation fracture or high permeability zone, restores water well productivity, increase the degree of water drive in.Through the analysis of the block reservoir characteristics, thought to adapt to the block of chemical water shutoff profile control system must have the following characteristics:the cracks effectively suppressed, high plugging strength; Can enter the formation of deep, avoid the loss of around; Good aging resistance, salt resistance measures are valid for long. So the new compound water shutoff profile control system was designed and developed, to accept the couplet of bentonite particles, a hydrophobic associating polymer, strong/weak gel formation strong polymer gel is given prior to, low-emission slug injection. Emphatically discusses the three kinds of water shutoff profile control mechanism of profile control system and in the area of adaptability, through the indoor test to evaluate the performance of each water shutoff profile control system, provide theoretical guidance and formula for the actual application.This paper expounds the slug of water shutoff profile control system and the design of the construction parameters, and measures in practical application situation, effect and economic benefit is evaluated, to expand the scale of water shutoff profile control applied in the area and the large fractured reservoir water plugging. |
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