Technology combining horizontal drilling and profile control blocking

Abstract

The invention discloses a technology combining horizontal drilling and profile control blocking. The problem that the requirements of thick reservoir exploitation cannot be met by independently using a profile control technique or a horizontal drilling technique due to the fact that severe ineffective injection-production circulation and portions relatively rich in surplus oil exist in a thick reservoir is solved. Specifically, profile control blocking is conducted at high-permeation portions; horizontal drilling is conducted at low-permeation portions; the pitch particle profile control mode is adopted for profile control blocking; and the hydraulic jet drilling mode is adopted for the horizontal drilling. Profile control blocking and horizontal drilling fully implement measure complementation advantages to effectively exploit the surplus oil in the thick reservoir while the ineffective circulation is controlled, and therefore water control and oil increase are achieved simultaneously, and the effective technological technique is explored for efficient thick reservoir exploitation.

Description

technical field [0001] The invention relates to a technology for developing thick oil layers in an oil field. Background technique [0002] Lamadian oilfield reservoirs are mainly developed with multi-segment and multi-rhythmic thick oil layers with serious heterogeneity. Thick oil layers with an effective thickness greater than 2 m accounted for 67.8% of the total thickness and 65.5% of the reserves, and the permeability gradient in the rhythmic section was more than 5 times. Coring data show that the weak unwashed section is mainly concentrated in the upper part of the thick oil layer, with an average thickness of 14.4m, accounting for about 51.7%. The remaining oil is mainly distributed in these parts, interlaced with the high water washing section, so it is difficult to tap the potential, and it is difficult to achieve good results by conventional measures. [0003] In thick oil layers, there are not only serious invalid injection-production cycles, but also places whe...

AI Technical Summary

Problems solved by technology

[0006] Although the profile control measures have controlled some high-permeability zones, they cannot fully activate the low-permeability zone, and cannot guarantee the effect of increasing oil production

However, the hydraulic jet horizontal drilling can start the low-permeability zone, but it cannot control the high-permeability zone, and the invalid injection-production cycle still exists

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