Discharge-aiding, energy-increasing and efficiency-improving method for open hole oil layer of ultra-short radius horizontal well

Abstract

The invention discloses a discharge-aiding, energy-increasing and efficiency-improving method for an open hole oil layer of an ultra-short radius horizontal well in the technical field of energy-increasing and plug-removing of oil and gas fields. The method comprises the following steps of S1, tripping a whipstock with the diameter of 114mm into a designed depth in a shaft by using a workover rig with the model of 350 or above and a G105 drill rod; S2, conducting casing windowing through a power faucet, conducting well drilling to the preset well depth according to the length of the inclined face of the whipstock and the design requirement, and completing polishing and grinding of a casing window; S3, measuring a drilling deflecting section well hole while drilling; S4, conducting horizontal section well drilling; S5, determining the construction displacement and pressure through discharge-aiding and energy-increasing injection testing of the horizontal section; S6, conducting horizontal section discharge-aiding and energy-increasing construction; S7, squeezing and injecting a small amount of A agent liquid, spacer liquid and B agent liquid in sequence, squeezing and injecting displacement liquid, and closing the well for reaction. According to the method, plug removing and energy increasing are carried out in the drilled ultra-short radius horizontal well open hole, the well completeness is improved, and the single well productivity is improved.

Description

technical field [0001] The invention relates to the technical field of energy-increasing and plug-removing in oil and gas fields, in particular to a method for promoting drainage, increasing energy and improving efficiency in open-hole oil layers of ultra-short-radius horizontal wells. Background technique [0002] Plug removal and energy enhancement technology is widely used in vertical wells and horizontal wells completed with casing. Various agents enter the oil layer through perforated blastholes, mixing and reacting uniformly. However, for long open-hole horizontal wells, since there is no follow-up perforation and completion process, the pollution caused by drilling fluid and cuttings during drilling can only be eliminated by the formation energy and fluid production capacity of the oil well itself. For formations with low formation pressure, this Pollution may never be eliminated; at the same time, in the horizontal section of the naked eye, the channel for the agent ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ultra-short-radius horizontal well open-hole oil layer drainage aid method to increase energy efficiency, to solve the current long open-hole horizontal well proposed in the background technology because there is no follow-up perforation completion process, the drilling process The pollution caused by fluid and cuttings can only be removed by the formation energy and fluid production capacity of the oil well itself. For formations with low formation pressure, this pollution may never be eliminated; In the oil layer with strong heterogeneity, it is difficult to control the amount of chemicals entering each part, and the mixing of various agents does not match, which means that the amount of chemicals is wasted and the generation of reactants is affected, which in turn affects the construction effect.

Images