A method of temporary plugging volume fracturing for highly deviated wells with screens

Abstract

The invention discloses a temporary plugging volume fracturing process method for a screen pipe high-inclination well. The temporary plugging volume fracturing process method for the screen pipe high-inclination well comprises the following steps that S1, basic parameters of an oil reservoir of a construction well are collected; S2, cluster perforation is carried out on a screen pipe reservoir section according to the collected basic parameters; S3, a cross-linked gel fracturing fluid is selected; S4, fracturing construction parameters and scale are set; S5, the fracturing fluid is injected into the formation to perform first-stage fracturing; S6, a powder high-strength water-soluble temporary plugging agent is injected to force a crack to turn on the end portion; S7, a particle high-strength water-soluble temporary plugging agent is injected into the formation to plug the open perforated position and the formed fracture seam, and second-stage temporary plugging fracturing is carried out; and S8, the step S5, step S6 and step S7 are repeated in sequence to complete the temporary plugging volume fracturing reconstruction of the screen pipe high-inclination well reservoir section. According to the temporary plugging volume fracturing process method for the screen pipe high-inclination well, the technology of ''large particle bridging and fine particle plugging'' is adopted to perform temporary plugging volume fracturing on the high-inclination well, so that the productivity is improved.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas production stimulation, in particular to a temporary plugging volume fracturing process method for high-deviated wells with screen pipes. Background technique [0002] Highly deviated well is a new type of well that solves the problem of well location deployment and improves the productivity of single oil and gas wells. Generally speaking, a directional well with a well inclination angle of 60-86° is called a highly deviated well (some people define it as the ratio of well inclination to vertical depth greater than 2). The schematic diagram of the wellbore structure of a highly deviated well in screen completion is as follows figure 1 shown. Highly deviated wells have a relatively large drainage area, and the pressure drop during development is relatively uniform and moderate. Highly deviated wells are suitable for reservoirs with low permeability; for oil layers with abundant verti...

AI Technical Summary

Problems solved by technology

[0005] Difficulties in downhole operations in highly deviated wells with screens are mainly as follows: (1) The loading and unloading of the pipe string in the wellbore varies greatly, making it difficult to interpret the downhole conditions; (2) Difficulty in running tools; (3) Conventional repair methods It cannot be implemented; (4) The torque and friction force of the pipe string is relatively large; (5) The pipe string in the well is close to the bottom of the wellbore. Drill sticking; (6) The force of the pipe string in the wellbore is relatively complicated, the pendulum force and bending stress are relatively large, and the component force is large. When the jam is released, the loss of torque and tension is large, and it is difficult to transfer the tension and torque to the stuck point. ; (7) The torque is not easy to reach the neutral point when the pipe string is undercut, the effective undercut length is short, the number of tripping and unloading of the pipe string is large, and the construction period is long

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