CN103075139A - Immovable pipe column hydraulic jet process for fracture acidizing and pipe column thereof - Google Patents

Abstract

The invention discloses a fixed tubular column hydraulic jetting process for fracture acidizing and a tubular column thereof, belonging to the field of petroleum and natural gas. The embodiment of the invention adopts a mode of serially connecting the multistage ejectors, puts the pipe string in a sugarcoated haw string mode into a well, and when multi-layer fracturing is implemented, adopts a mode of pitching and rotating layers to implement multi-layer fracturing from bottom to top, thereby realizing the multi-layer fracturing of an immobile pipe column. Each ejector corresponds to a production layer, and the upper part and the lower part of each ejector are respectively connected with a centralizer, the process can realize perforation, fracturing and acidizing combined operation without lifting a pipe column, and the number of the ejectors which are put into the process can be determined according to different well conditions.

Description

A kind of fracture acidizing fixed tubular column jetting technique and tubing string thereof

Technical field

The present invention relates to the petroleum gas field, particularly a kind of fracture acidizing fixed tubular column jetting technique and tubing string thereof.

Background technology

After the Oil/gas Well of oil gas field is finished drilling engineering, in order to improve oil and gas production, the general construction that all will carry out well stimulation, common volume increase construction technology comprises to be processed underground payzone, adopt the mode of deep penetrating perforating to open the passage of oil gas from underground payzone to well, these all are the important measures of petroleum industry stable yields volume increase.

Specifically, two kinds of techniques are arranged.

Technique one adopts the shell gun perforation process, because its perforating depth is limited, is difficult for the penetration stain band, easily produces secondary pollution, and particularly the exploitation difficulty to hypotonic thin interbed oil-gas reservoir is larger.

Technique two adopts the hydraulic jetting fracturing acidification technique, and this technique is that beam hole and fracture acidizing are integrated novel well stimulation technique, can effectively avoid because the secondary pollution that the blast perforation brings.Wherein, hydro-jet fracturing technology is catchment power abrasive perforating, fracturing, the integrated novel volume increase reforming technology of isolation, is applicable to low-permeability oil deposit straight well, high angle hole and horizontal well, is a kind of effective and feasible method of low-permeability oil deposit fracturing yield increasing.But conventional hydro-jet fracturing technology all is limited to the individual layer pressure break, can not realize fixed tubular column coiled tubing jetting separate stratum fracfturing, and the problem of bringing thus is that efficiency of construction is low, the oil and gas gathering rate is low, waste device resource, cost increase.

Summary of the invention

All be limited to the individual layer pressure break in order to overcome hydro-jet fracturing technology conventional in the prior art processes two, can not realize fixed tubular column coiled tubing jetting separate stratum fracfturing, and cause that efficiency of construction is low, the oil and gas gathering rate is low, problem that waste device resource, cost increase, the embodiment of the invention provides a kind of fracture acidizing with fixed tubular column jetting technique and tubing string thereof.Described technical scheme is as follows:

A kind of fracture acidizing fixed tubular column jetting technique, the mode of the multistage spray gun series connection of described jetting process using, with G.I.H after the multiple valve series connection, when implementing multiple fracturing, adopt pitching to turn the mode of layer, implementing from the bottom to top the N lamination splits, the N lamination of realizing fixed tubular column splits, wherein, and N＞1, the quantity of ball is N, and the quantity of ejector is N;

Described fracture acidizing specifically operates in accordance with the following steps with fixed tubular column jetting technique:

Step 1, instrument are measured size to well;

Step 2 adopts the drift size gauge tool drifting of given size to the artificial bottom of a well;

Step 3 is lowered to spraycan to design attitude;

Step 4, the electrical measurement school is dark, adjusts the tubing string position;

Step 5 is installed the pressure break pipeline;

Step 6, fracturing unit truck is emptying, pressure testing;

Step 7 is thrown a ball to sealed ball seat, and pressure liquid is penetrated by an ejector;

Step 8, pitching turns layer, throws No. two ball, and No. two the ejector inner sliding sleeve is opened, and fracturing fluid is penetrated by No. two ejectors;

Step 9, pitching turns layer, throws No. three ball, and No. three the ejector inner sliding sleeve is opened, and fracturing fluid is penetrated by No. three ejectors;

Step 10, by that analogy, pitching turns layer, until throw the N ball, N ejector inner sliding sleeve is opened, fracturing fluid is penetrated by the N ejector;

Step 11, the open flow that drives a well, discharge opeing.

Particularly, described number of plies N is four layer 4, and the quantity of described ball is four and is respectively ball to four ball No. one, and the quantity of ejector is four and is respectively ejector to four ejector No. one.

The embodiment of the invention also provides a kind of and has comprised oil pipe and a plurality of ball for the tubing string of described fracture acidizing with fixed tubular column jetting technique, and described oil pipe is made of safe linkage section, righting jet segment, ball seat and boot segment from top to down successively,

Described safe linkage section is arranged on topmost, and described safe linkage section comprises safety joint;

In the middle of described righting jet segment is arranged on, described righting jet segment comprises centralizer and ejector, the quantity of described centralizer is 2N, the quantity of described ejector and described ball is N, described ejector is from top to bottom according to N number to No. one order setting, the two ends of each ejector respectively connect a described centralizer, N ejector to N-1 ejector includes ejector body and the inner sliding sleeve of establishing in the inner, No. one ejector comprises ejector body, inner sliding sleeve is not set in it, described N ejector to the internal diameter of the inner sliding sleeve of N-1 ejector increases successively, described ball is according to No. one to N number order setting, wherein, described N ball to the external diameter of described N-1 ball matches with the inner sliding sleeve of the N of institute ejector to described N-1 ejector respectively in turn, block up the N of institute ejector to described N-1 ejector by described N ball to described N-1 ball sealing, the external diameter of a ball and described ball seat match, by the stifled described ball seat of described N ball sealing;

Described boot segment is arranged on bottom, and described boot segment comprises guide shoe and screen casing, and described screen casing is used for increasing area of passage when anti-flushing well.

Particularly, as preferably, a described ejector is equipped with the carboloy nozzle of 6～12 Spiral distributions on all to the ejector body of N ejector.

Particularly, the quantity of described ejector is four, and the quantity of described ball is four.

The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is:

Compared to existing technology, the invention discloses a kind of fracture acidizing fixed tubular column jetting technique and tubing string thereof, the effective ways of low-permeability oil deposit fracturing yield increasing, it adopts the mode of series ejectors series connection, pipe string G.I.H with " sugarcoated haws string " formula, when implementing multiple fracturing, adopt pitching to turn the mode of layer, implement from the bottom to top multiple fracturing.Realize thus " fixed tubular column multiple fracturing ".Corresponding payzone of each ejector, and each ejector all connects up and down a centralizer, this technique can realize that perforation, fracture acidizing connection do, and do not need the upper lifting pipe post; According to the difference of hole condition, determine to be lowered to the quantity of ejector, this technique can effectively reduce the construction operation operation, reduces constructor's working strength and operating risk and cost.

So adopt the described technique of the embodiment of the invention and tubing string, in work progress, open by the nozzle of control series ejectors, do not need mobile tubing string can realize multiple fracturing, can significantly improve oil and gas gathering efficient and collection capacity, reduce acquisition cost.

Description of drawings

In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is that the embodiment of the invention is described for the structural representation of fracture acidizing with the tubing string of fixed tubular column jetting technique.

Among the figure:

10 safe linkage sections,

20 righting jet segments, 1 centralizer, 2 No. four ejectors, 3 No. three ejectors, 4 No. two ejectors, No. 5 ejectors,

6 ball seats,

30 boot segments, 7 screen casings, 8 guide shoes.

The specific embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.

Embodiment 1

Referring to Fig. 1, a kind of fracture acidizing fixed tubular column jetting technique, the mode that adopts multistage spray gun to connect is with G.I.H after the multiple valve series connection, when implementing multiple fracturing, adopt pitching to turn the mode of layer, implement from the bottom to top the N lamination and split, realize that the N lamination of fixed tubular column splits, wherein, N＞1, the quantity of ball are N, and the quantity of ejector is N;

Described fracture acidizing specifically operates in accordance with the following steps with fixed tubular column jetting technique:

Step 1, instrument are measured size to well;

Step 2 adopts the drift size gauge tool drifting of given size to the artificial bottom of a well;

Step 3 is lowered to spraycan to design attitude;

Step 4, the electrical measurement school is dark, adjusts the tubing string position;

Step 5 is installed the pressure break pipeline;

Step 6, fracturing unit truck is emptying, pressure testing;

Step 7 is thrown a ball to sealed ball seat 6, and pressure liquid is penetrated by an ejector 5;

Step 8, pitching turns layer, throws No. two ball, and No. two ejector 4 inner sliding sleeves are opened, and fracturing fluid is penetrated by No. two ejectors 4;

Step 9, pitching turns layer, throws No. three ball, and No. threeejector 3 inner sliding sleeves are opened, and fracturing fluid is penetrated by No. threeejectors 3;

Step 10, by that analogy, pitching turns layer, until throw the N ball, N ejector inner sliding sleeve is opened, fracturing fluid is penetrated by the N ejector;

Step 11, the open flow that drives a well, discharge opeing.

Particularly, referring to shown in Figure 1, described number of plies N is four layer 4, the quantity of described ball is four and is respectively ball to four ball No. one, the quantity of ejector is four and is respectively 5 to No. fourejectors 2 of an ejector, and described fracture acidizing specifically operates in accordance with the following steps with fixed tubular column jetting technique:

Step 1, instrument are measured size to well;

Step 2 adopts the drift size gauge tool drifting of given size to the artificial bottom of a well;

Step 3 is lowered to spraycan to design attitude;

Step 4, the electrical measurement school is dark, adjusts the tubing string position;

Step 5 is installed the pressure break pipeline;

Step 6, fracturing unit truck is emptying, pressure testing;

Step 7, two sections of pressure break palpuses, two sections payzones that refer to the Xu Jia korneforos of palpus are thrown No. one ball, sealed ball seat 6, pressure liquid is penetrated by an ejector 5;

Step 8, pitching turns layer, and four sections of pressure break palpuses are thrown No. two ball, and the inner sliding sleeve of 5, No. two ejectors 4 of an ejector of shutoff is opened, and fracturing fluid is penetrated by No. two ejectors 4;

Step 9, pitching turns layer, and pressure break palpus six hypomeres are thrown No. three ball, and 4, No. threeejector 3 inner sliding sleeves of No. two ejectors of shutoff are opened, and fracturing fluid is penetrated by No. threeejectors 3;

Step 10, pitching turns layer, and pressure break palpus six epimeres: throw No. four ball, 3, No. fourejector 2 inner sliding sleeves of No. three ejectors of shutoff are opened, and fracturing fluid is penetrated by No. fourejectors 2;

Step 11, the open flow that drives a well, discharge opeing.

As possessing the lift pipe string condition, then kill-job trips out fracturing string, is replaced by blank tubing discharge opeing, test.

Compared to existing technology, the described hydro-jet fracturing technology of the embodiment of the invention has following characteristics:

(1) do not need to carry oil pipe, but pressure break more than four layers is finished in pitching, without the conventional serial risk of carrying oil pipe on the pressure break of spraying, used safer in the gas well;

(2) working procedure is very simple, but one day pressure break multilayer is significantly saved the formation testing expense;

(3) fracturing process and conventional pressure break are similar, need not employ not kill-job equipment;

(4) can construct the same day, drove a well discharge opeing the same day, can significantly shorten the holdup time of fracturing fluid in the stratum.

Embodiment 2

The embodiment of the invention also provides a kind of and has comprised oil pipe and a plurality of ball for the tubing string of described fracture acidizing with fixed tubular column jetting technique, and described oil pipe is made ofsafe linkage section 10, rightingjet segment 20, ball seat 6 andboot segment 30 from top to down successively,

Describedsafe linkage section 10 is arranged on topmost, and describedsafe linkage section 10 comprises safety joint;

In the middle of described righting jet segment 20 is arranged on, described righting jet segment 20 comprises centralizer 1 and ejector, the quantity of described centralizer 1 is 2N, the quantity of described ejector and described ball is N, described ejector is from top to bottom according to N number to No. one order setting, the two ends of each ejector respectively connect a described centralizer 1, N ejector to N-1 ejector includes ejector body and the inner sliding sleeve of establishing in the inner, No. one ejector 5 comprises ejector body, inner sliding sleeve is not set in it, described N ejector to the internal diameter of the inner sliding sleeve of N-1 ejector increases successively, described ball is according to No. one to N number order setting, wherein, described N ball to the external diameter of described N-1 ball matches with the inner sliding sleeve of the N of institute ejector to described N-1 ejector respectively in turn, block up the N of institute ejector to described N-1 ejector by described N ball to described N-1 ball sealing, the external diameter of a ball and described ball seat 6 match, by the stifled described ball seat 6 of described N ball sealing, described boot segment 30 is arranged on bottom, described boot segment 30 comprises guide shoe 8 and screen casing 7, and described screen casing 7 is used for increasing area of passage when anti-flushing well.

Particularly, as preferably, the ejector body of described ejector 5 to N ejectors is equipped with the carboloy nozzle of 6～12 Spiral distributions on all.

Particularly, the quantity of described ejector is four, and the quantity of described ball is four.

Conventional hydro-jet fracturing technology all is limited to the individual layer pressure break compared to existing technology, can not realize fixed tubular column coiled tubing jetting separate stratum fracfturing, the problem that cause that efficiency of construction is low, the oil and gas gathering rate is low, waste device resource, cost increases, the embodiment of the invention is passed through, the nozzle of control series ejectors is opened, do not need mobile tubing string can realize multiple fracturing, can significantly improve oil and gas gathering efficient and collection capacity, reduce acquisition cost.

The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. a fracture acidizing is with fixed tubular column jetting technique, it is characterized in that, the mode of the multistage spray gun series connection of described jetting process using is with G.I.H after the multiple valve series connection, when implementing multiple fracturing, adopt pitching to turn the mode of layer, implement from the bottom to top the N lamination and split, realize that the N lamination of fixed tubular column splits, wherein, N＞1, the quantity of ball are N, and the quantity of ejector is N;

Described fracture acidizing specifically operates in accordance with the following steps with fixed tubular column jetting technique:

Step 1, instrument are measured size to well;

Step 2 adopts the drift size gauge tool drifting of given size to the artificial bottom of a well;

Step 3 is lowered to spraycan to design attitude;

Step 4, the electrical measurement school is dark, adjusts the tubing string position;

Step 5 is installed the pressure break pipeline;

Step 6, fracturing unit truck is emptying, pressure testing;

Step 7 is thrown a ball to sealed ball seat, and pressure liquid is penetrated by an ejector;

Step 8, pitching turns layer, throws No. two ball, and No. two the ejector inner sliding sleeve is opened, and fracturing fluid is penetrated by No. two ejectors;

Step 9, pitching turns layer, throws No. three ball, and No. three the ejector inner sliding sleeve is opened, and fracturing fluid is penetrated by No. three ejectors;

Step 10, by that analogy, pitching turns layer, until throw the N ball, N ejector inner sliding sleeve is opened, fracturing fluid is penetrated by the N ejector;

Step 11, the open flow that drives a well, discharge opeing.

2. jetting technique according to claim 1 is characterized in that, described number of plies N is four layer 4, and the quantity of described ball is four and is respectively ball to four ball No. one, and the quantity of ejector is four and is respectively ejector to four ejector No. one.

3. be used for claim 1 or 2 described fracture acidizings with the tubing string of fixed tubular column jetting technique, comprise oil pipe and a plurality of ball, described oil pipe is made of safe linkage section, righting jet segment, ball seat and boot segment from top to down successively, it is characterized in that,

Described safe linkage section is arranged on topmost, and described safe linkage section comprises safety joint;

In the middle of described righting jet segment is arranged on, described righting jet segment comprises centralizer and ejector, the quantity of described centralizer is 2N, the quantity of described ejector and described ball is N, described ejector is from top to bottom according to N number to No. one order setting, the two ends of each ejector respectively connect a described centralizer, N ejector to N-1 ejector includes ejector body and the inner sliding sleeve of establishing in the inner, No. one ejector comprises ejector body, inner sliding sleeve is not set in it, described N ejector to the internal diameter of the inner sliding sleeve of N-1 ejector increases successively, described ball is according to No. one to N number order setting, wherein, described N ball to the external diameter of described N-1 ball matches with the inner sliding sleeve of the N of institute ejector to described N-1 ejector respectively in turn, block up the N of institute ejector to described N-1 ejector by described N ball to described N-1 ball sealing, the external diameter of a ball and described ball seat match, by the stifled described ball seat of described N ball sealing;

Described boot segment is arranged on bottom, and described boot segment comprises guide shoe and screen casing, and described screen casing is used for increasing area of passage when anti-flushing well.

4. tubing string according to claim 3 is characterized in that, a described ejector is equipped with the carboloy nozzle of 6～12 Spiral distributions on all to the ejector body of N ejector.

5. tubing string according to claim 4 is characterized in that, the quantity of described ejector is four, and the quantity of described ball is four.

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