CN101418681A - Oil-gas well separate-layer fracturing co-production primary pipe column process - Google Patents

Abstract

The invention relates to a process method for fracturing reformation and exploitation of oil and gas wells in oil fields, which comprises the steps of determining different fracturing process parameters of each oil and gas layer according to geological data, putting down underground tools such as a hydraulic anchor, a packer, a sliding sleeve, a ball seat and the like into a well according to a certain sequence, sealing the packer by one-time pressing, anchoring the hydraulic anchor, then performing targeted fracturing reformation on each oil and gas layer by ball throwing through the opening and closing action of the sliding sleeve, and performing combined exploitation after the construction operation is finished. The process determines the corresponding fracturing tubular column structure according to different reservoirs and different fracturing parameters, realizes the selective fracturing modification and commingled production mode of the reservoirs at one time, has complete controllability of the fracturing sequence of each layer, has small operation risk, can greatly shorten the fracturing construction operation time, and achieves the purposes of improving the yield and the exploitation effect of the oil-gas well.

Description

Once tubular column process for combination oil production by multiple fracturing for oil gas well

Technical field:

The present invention relates to a kind of process that is used for oil and gas wells in oil fields fracturing reform and exploitation, belong to the oil exploitation technology class.

Background technology:

In oil field prospecting exploitation and oil gas well manufacturing process,, often to carry out fracturing reform to production of hydrocarbons well reservoir in order to improve oil gas well production and oil field development effect.At present, pressure break is normally generally carried out to complete all layers of well position in the scene when carrying out the well fracturing construction.Because formation parameters such as the permeability of each reservoir of oil gas well, degree of porosity are different with characteristic, the form of construction work of the general pressure break of this kind can not be treated with a certain discrimination, its result makes and the interlayer contradiction aggravation between the original high less permeable layer that just exists is difficult to the fracturing effect that reaches desirable.

Summary of the invention:

The object of the invention is to provide a kind of and the different reservoir packing of same well can be opened,, carry out purposive separate stratum fracfturing and can behind pressing crack construction, carry out the once tubular column process for combination oil production by multiple fracturing for oil gas well of combination producing at a certain reservoir characteristics.

Purpose technical scheme of the present invention is as follows.This kind technology is to determine each oil, the different fracturing technology parameter of gas-bearing formation according to geologic information, with downhole tools such as hydraulic anchor, packer, sliding sleeve, ball seats according to a definite sequence G.I.H, make packer set by disposable suppressing, the hydraulic anchor grappling, pitching is carried out fracturing reform targetedly by the on-off action of sliding sleeve to each oil-gas Layer then, can merge exploitation after construction operation finishes.This fracturing string can be realized two covers and three cover series of strata separate stratum fracfturings and merge exploitation that main construction course is:

(1) earlier the tubing string string is arrived the precalculated position down, suppress then and make packer set, the hydraulic anchor grappling;

(2) suppress through pitching, according on return mode, successively carry out fracturing reform by different pressing crack construction parameters;

(3) after pressing crack construction finishes, whole sliding sleeves are opened, a whole set of tubing string is stayed in the pit shaft, merges exploitation as flow string.

Technology provided by the invention is determined corresponding fracturing string structure according to different reservoirs and different fracturing parameters, the sleective fracturing transformation of disposable realization reservoir and close the mode of adopting, and each lamination splits order and has controllability completely, operating risk is little, can shorten the pressing crack construction activity duration greatly, reach the purpose that improves oil gas well production and exploitation effect.

Description of drawings:

The oil gas well separate stratum fracfturing that accompanying drawing adopts for the present invention is closed and is adopted the tubular column structure schematic diagram one time.

The specific embodiment:

Below in conjunction with accompanying drawing enforcement of the present invention is illustrated.

As shown in the figure, to close the excavating technology tubing string be three cover series of strata to the oil gas well separate stratum fracfturing that provides of this embodiment.Be assembled with hydraulic anchor 3,6,9 and packer 4,7,10 respectively on the tubing string of three series of strata corresponding positions top, be respectively equipped with sliding sleeve 5,8 with first, second corresponding position, two layer positions, the tubing string lower end is provided with ball seat 11.Among the figure, the subject matter of each label representative is as follows:

The 1-oil pipe; The 2-sleeve pipe; 3,6,9-hydraulic anchor; 4,7,10-separator; 5,8-sliding sleeve; The 11-ball seat; 12,13,14-oil reservoir.

Claims (1)

1, a kind of once tubular column process for combination oil production by multiple fracturing for oil gas well, it is characterized in that: this technology is to determine each oil, the different fracturing technology parameter of gas-bearing formation according to geologic information, with downhole tools such as hydraulic anchor, packer, sliding sleeve, ball seats according to a definite sequence G.I.H, make packer set by disposable suppressing, the hydraulic anchor grappling, pitching is carried out fracturing reform targetedly by the on-off action of sliding sleeve to each oil-gas Layer then, can merge exploitation after construction operation finishes; This fracturing string can be realized two covers and three cover series of strata separate stratum fracfturings and merge exploitation that main construction course is:

(1) earlier the tubing string string is arrived the precalculated position down, suppress then and make packer set, the hydraulic anchor grappling;

(2) suppress through pitching, according on return mode, successively carry out fracturing reform by different pressing crack construction parameters;

(3) after pressing crack construction finishes, whole sliding sleeves are opened, a whole set of tubing string is stayed in the pit shaft, merges exploitation as flow string.

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