Method for oil extraction in multi-bottom and multi-branch well by artesian injection

Abstract

The invention relates to a method for oil extraction in a multi-bottom and multi-branch well by artesian injection. The method is realized through the following steps of: digging a first well and a second well; drilling injection branches in the first well by utilizing a general drilling technology, wherein the injection branches penetrate through a water layer and an oil layer below the water layer; putting down a slotted pipe to communicate the water layer and the oil layer, wherein water of the water layer naturally flows to the oil layer to complement the energy of the oil layer because the water layer has high pressure and the oil layer has low pressure; making a cement plug to plug the joint of a branch and a first borehole; extracting oil from the oil layer by adopting the second well; and drilling a first oil extraction branch and a second oil extraction in the first well by utilizing the general drilling technology to utilize the oil extraction function of the first well. Theinvention has the advantages of improving the strata pressure of the oil layer with poor water body energy, increasing the yield of the oil layer, realizing the two functions of oil extraction and artesian injection, saving well slots and providing convenience for subsequent production increase.

Description

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AI Technical Summary

Benefits of technology

The technical effect of this new technology lies on increasing the force at which an oily liquid can be lifted by means other than gravity from underground layers without causing damage or losing its properties for better extraction purposes compared to previous methods like drilling holes into subterranean formations. This makes more efficient use of resources while also reducing costs associated therewith.

Problems solved by technology

Technician's job involves dividing between different phases during the course of producing oil through various processes such as drilling, pump-up operations, etc., which require an increase in power input compared to traditional methods like injecting saltwater downwardly onto the surface of the earth after drilling. However, current manual techniques are expensive because they involve multiple steps that take time away from optimal efficiency. Therefore, technical solutions aimed at improving these existing systems have been proposed overall.

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