Loose sandstone fracturing, filling, sand prevention, yield increase and profile control integrated design method

Abstract

The invention relates to a loose sandstone fracturing, filling, sand prevention, yield increase and profile control integrated design method which comprises the following steps: 1) performing a fracturing crack initiation and extension numerical simulation experiment on loose sandstone through a fracturing device to obtain a loose sandstone fracturing crack initiation and extension numerical simulation result; 2) reservoir numerical simulation: describing the real reservoir dynamic state by using the established running water two-phase seepage mathematical model, and simulating the exploitation process of an actual oil field by using seepage mechanics; and (3) on the basis of the fracturing crack initiation and extension numerical simulation result and the oil reservoir numerical simulation result, implementing fracturing, filling, profile control and yield increase integrated design. According to the method, a high-permeability layer is prevented from being fractured while a relatively-low-permeability layer is selectively fractured, the relatively-low-permeability reservoir is transformed, and the purpose of integrated operation of profile control, water control, sand preventionand yield increase is achieved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to an integrated design method for unconsolidated sandstone fracturing filling, sand control, production increase and profile control. Background technique [0002] There are a large number of unconsolidated sandstones in the Bohai Sea, Dagang, and Shengli Oilfields in my country, and the comprehensive fluid production of single wells is low after sand control. Due to the significant difference in physical properties between layers, large differences in reservoir water flooding degree, and complex distribution of remaining oil, traditional profile control and water control schemes only try to seal high aquifers with good physical properties, and it is difficult to effectively control reservoirs with relatively poor physical properties. remodel. [0003] The fracturing filling technology forms short and wide fractures in the reservoir and fills them with high-sand rat...

AI Technical Summary

Problems solved by technology

Due to the significant difference in physical properties between layers, large differences in reservoir water flooding degree, and complex distribution of remaining oil, traditional profile control and water control schemes only try to seal high aquifers with good physical properties, and it is difficult to effectively control reservoirs with relatively poor physical properties. transform

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