Segmented acid fracturing water controlling production increasing method for carbonate rock fractured-vuggy reservoir deep open hole horizontal well

Abstract

The invention provides a segmented acid fracturing water controlling production increasing method for a carbonate rock fractured-vuggy reservoir deep open hole horizontal well, and belongs to the technical field of well completion of oil-gas wells. The segmented acid fracturing water controlling production increasing method comprises the steps: the number of segments of horizontal well segmented acid fracturing is determined; according to the number of the segments, the horizontal well is subjected to segmented perforation acid fracturing; and all the segments subjected to segmented perforation acid fracturing are subjected to water controlling production. Determination of the number of the segments, overall perforation, segmented fracturing and segmented water controlling are realized, the cost-benefit ratio is optimized, the oil recovery degree of a horizontal well control area is increased, the oil production of the carbonate rock fractured-vuggy reservoir deep open hole horizontalwell is overall increased, the input-output ratio of segmented acid fracturing of the deep open hole horizontal well is increased, oil producing and water controlling are facilitated, and applicationprospects are wide.

Description

technical field [0001] The invention belongs to the technical field of completion of oil and gas wells, and in particular relates to a method for increasing the production of deep open-hole horizontal wells in deep open-hole horizontal wells by staged acid pressure control. Background technique [0002] During the development of conventional oil and gas reservoirs, in order to carry out fracturing operations, it is usually necessary to run casing in the wellbore and cement the well, and then use the perforating gun carried by the tubing or the perforating gun carried by the cable to perforate the well section to be fractured After that, a special wellhead for fracturing is installed at the wellhead, and high-pressure liquid is pumped in to perform fracturing operations on the perforated section. As for water control in horizontal wells with casing cementing, there are relatively few methods for water control in horizontal wellbores for casing perforation and fracturing compl...

AI Technical Summary

Problems solved by technology

[0004] For the tight lithologic reservoirs of carbonate fracture-vuggy reservoirs, it is not suitable to run casing cementing, and there is a technical demand for multi-stage fracturing to improve recovery, and at the same time, due to the conventional open hole packer plus sliding sleeve The acid fracturing technology is difficult, the pressure difference of the open hole packer is small, and the ball sliding sleeve causes the pipe string to fail to be fully bored, etc., so it is not ideal for deep open hole horizontal wells in carbonate fracture-cavity reservoirs.

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