Integrated well abandoning operation technology

Abstract

The invention relates to the technical field of petroleum and natural gas, in particular to an integrated well abandoning operation technology which comprises the following steps: S1, perforation: a rectangular perforating gun enters a well abandoning pipeline needing well abandoning operation, and after the rectangular perforating gun reaches a specified position through computer control, the rectangular perforating gun enters a well abandoning pipeline needing well abandoning operation; a hole of the rectangular perforating gun is used for generating energy-gathered explosion to break down the casing pipe; by means of the rectangular perforating gun, due to the unique groove-shaped structural design, the sufficient surface area is provided for perforation, and compared with explosion perforation, the rectangular perforating gun can obtain a larger flowing sectional area more easily, so that later well cementation cement is squeezed into the cement through pumping, meanwhile, the cement flows into a rectangular groove, and the well cementation efficiency is improved. And after solidification, the fixing effect of cement mortar can be well improved, gaps generated by gas and liquid from a vertical channel can be cut off, and therefore the channel is permanently sealed in a shaft annulus, and the well abandoning operation and the well cementation quality are ensured.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas, and more specifically relates to an integrated well abandonment operation technology. Background technique [0002] In the later stage of oil and gas well development, it is generally necessary to implement well abandonment operations on wells, which are generally divided into permanent well abandonment operations and temporary well abandonment operations. The main purpose of well abandonment operations is to reduce the occurrence of blowouts to reduce Environmental pollution and waste of oil and gas caused by accidental oil leakage and blowout. [0003] Therefore, it is an urgent operation problem to be solved in various oil and gas fields to study the integration of well abandonment, which can combine the advantages of operation technology and avoid its disadvantages, one-trip drilling operation tool perforation, high-pressure cleaning and well cementing. [0004] The traditi...

AI Technical Summary

Problems solved by technology

[0004] The traditional abandonment operation takes a long time, and the contact area between the cement and the well is small, resulting in poor cementing effect, which affects the later use effect, especially when the oil pressure in the abandoned well is high. The possibility of abandoning the cement in the well occurs, so an abandonment operation technology that can solve this technical problem is needed