Method for increasing production of horizontal well based on method for filling multi-branch small boreholes with chemical sand

Abstract

The invention discloses a method for increasing the production of a horizontal well based on a method for filling multi-branch small boreholes with chemical sand, and the method is for a plastic formation. The method comprises the following steps that the multi-branch holes of the horizontal well are drilled, and a heat convertible resin material is injected into the multi-branch open holes, wherein the heat convertible resin material comprises a component X and a component Y which are immiscible, the component X is a solvent, and the component Y is a supermolecular compound material; and thecomponent Y can response to the change of external temperature and can be transformed into the solid phase from the liquid phase. The method can be for the plastic formation instead of a routine staged fracturing technology for the horizontal well, the seepage area of the immediate vicinity of the well is increased, the individual well deliverability is improved, and the formation sand productioncan be prevented while the production is increased. Compared with gravel filling, no sand control liner needs to be placed into the small boreholes, the well completion process is simplified, and themethod is more convenient to implement, safe and reliable.

Description

technical field [0001] The invention relates to the technical field of production in the process of petroleum exploration and development, in particular to a method for increasing production of horizontal wells based on multi-branch slimholes filled with chemical sand. Background technique [0002] For low-permeability sandstone reservoirs, hydraulic fracturing technology is the main production stimulation method. However, due to the characteristics of high shale content, loose cementation, and strong plasticity of rocks, hydraulic fracturing is difficult to obtain fractures with high conductivity, and the production stimulation effect is poor. [0003] At present, hydraulic fracturing or acidizing technology is basically used for oil field reservoir stimulation and stimulation technology. Hydraulic fracturing is widely used, but there are some shortcomings in the specific implementation of hydraulic fracturing. For strong plasticity, For low-permeability reservoirs with hig...

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Problems solved by technology

[0002] For low-permeability sandstone reservoirs, hydraulic fracturing technology is the main production stimulation method. However, due to the characteristics of high shale content, loose cementation, and strong plasticity of rocks, hydraulic fracturing is difficult to obtain fractures with high conductivity, and the production stimulation effect is poor.

[0003] At present, hydraulic fracturing or acidizing technology is basically used for oil field reservoir stimulation and stimulation technology. Hydraulic fracturing is widely used, but there are some shortcomings in the specific implementation of hydraulic fracturing. For strong plasticity, For low-permeability reservoirs with high shale content, the more common problem is that after hydraulic fracturing to form artificial fractures, the fractures formed are generally small, and the proppant particles pumped in are easy to close gradually after the construction is completed. When it is embedded in the fracture wall, it cannot effectively support the fracture, resulting in a decrease in flow conductivity, which eventually leads to an unsatisfactory stimulation effect and an insignificant increase in oil production.

At the same time, because of the high mud content, the formation is easy to produce sand, which cannot effectively prevent sand production

[0004] At present, the open-hole completion technology is widely used in lateral wells. However, for open-hole completions, especially for multi-lateral horizontal wells, the well wall is easy to collapse, causing the wellbore to be blocked and the oil and gas channels to be blocked. , resulting in significant economic losses; and open-hole completion cannot prevent sand, so it is not suitable for some high-permeability and sand-prone formations

Existing sand control completions with gravel packing have disadvantages such as complex process and carrying gravel cannot be effectively packed to the designated position

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