CN115075782B - Depth correction method for oil pipe transmission perforation - Google Patents
Depth correction method for oil pipe transmission perforation Download PDFInfo
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- CN115075782B CN115075782B CN202110260459.5A CN202110260459A CN115075782B CN 115075782 B CN115075782 B CN 115075782B CN 202110260459 A CN202110260459 A CN 202110260459A CN 115075782 B CN115075782 B CN 115075782B
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000012937 correction Methods 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 title abstract description 13
- 210000002445 nipple Anatomy 0.000 claims abstract description 47
- 238000010276 construction Methods 0.000 claims abstract description 33
- 238000002955 isolation Methods 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 230000008878 coupling Effects 0.000 claims description 51
- 238000010168 coupling process Methods 0.000 claims description 51
- 238000005859 coupling reaction Methods 0.000 claims description 51
- 238000005070 sampling Methods 0.000 claims description 44
- 238000010008 shearing Methods 0.000 claims description 26
- 230000000977 initiatory effect Effects 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 238000010304 firing Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 238000005422 blasting Methods 0.000 claims 2
- 238000005474 detonation Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000012806 monitoring device Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 241000191291 Abies alba Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/119—Details, e.g. for locating perforating place or direction
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
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- Geochemistry & Mineralogy (AREA)
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The application provides a depth correction method for oil pipe transmission perforation, and belongs to the technical field of oil field development. The method comprises the following steps: sequentially installing an oil pipe nipple, an isolation oil pipe and a perforating device at the lower end of the oil pipe; lowering an oil pipe into a construction well, wherein the length of the oil pipe is matched with the first depth of a target layer to be perforated; the logging instrument is put into an oil pipe, and if the logging instrument meets resistance in the oil pipe, the logging instrument is pushed to a nipple of the oil pipe by injecting liquid into the oil pipe; measuring a logging curve of the construction well through the logging instrument after the logging instrument reaches the short section of the oil pipe; based on the logging curve and the length of the isolation oil pipe, the length of the oil pipe is adjusted to enable the perforating device to be aligned with the target layer, so that the perforating device can be accurately aligned with the target layer, and the perforating accuracy of the perforating device on the target layer can be improved.
Description
Technical Field
The application relates to the technical field of oilfield development, in particular to a depth correction method for oil pipe transmission perforation.
Background
In the oilfield development process, perforation operation is an essential important procedure after casing completion; the perforating operation is to make the stratum to which the target layer belongs communicate with the well bore through the casing pipe and the cement ring of the target layer after the perforating device is put into the exploitation target layer in the well, so that the oil gas of the stratum can enter the well bore. In order to ensure that the perforating device is accurately aligned with the layer of interest, corrections are made to the depth of the perforating device within the wellbore.
In the related art, after a logging instrument penetrating into a target layer measures a logging curve, the depth of a perforating device is determined based on the logging curve, and then the depth of the perforating device is adjusted based on the depth of the perforating device and the error of the target layer. Because the logging instrument can only reach the position that the well deviation is less than 60 degrees, when the well deviation of the position of the target layer is greater than 60 degrees, the logging instrument is difficult to be lowered into the target layer, the depth on the logging curve measured by the logging instrument is only to the position that the well deviation is less than 60 degrees, the depth from the position that the well deviation is greater than 60 degrees to the position of the target layer can only be determined through the length of the underground oil pipe, and then the depth of the perforating device can be determined through the length of the oil pipe and the depth on the logging curve together, but because the oil pipe can be deformed in a telescopic way in the underground, errors exist in the length of the oil pipe, and thus the perforating device cannot be accurately aligned with the target layer when the depth of the perforating device is adjusted based on the length of the oil pipe and the depth on the logging curve, and the perforating accuracy of the perforating device is low.
Disclosure of Invention
The embodiment of the application provides a depth correction method for oil pipe transmission perforation, which can improve the accuracy of perforation of a perforation device. The technical scheme is as follows:
in one aspect, a depth correction method for tubing transmission perforation is provided, the method comprising:
sequentially installing an oil pipe nipple, an isolation oil pipe and a perforating device at the lower end of the oil pipe;
the oil pipe is lowered into a construction well, wherein the length of the oil pipe is matched with the first depth of a target layer to be perforated;
a logging instrument is put into the oil pipe, and if the logging instrument meets resistance in the oil pipe, the logging instrument is pushed to the short section of the oil pipe by injecting liquid into the oil pipe;
measuring a logging curve of the construction well through the logging instrument after the logging instrument reaches the oil pipe nipple;
and adjusting the length of the oil pipe based on the logging curve and the length of the isolation oil pipe so as to enable the perforating device to be aligned with the target layer.
In one possible implementation, the perforating device includes a perforating gun and a ball-casting initiation assembly;
install oil pipe nipple joint, isolation oil pipe and perforating device in proper order in oil pipe's lower extreme, include:
the oil pipe nipple, the isolation oil pipe, the ball throwing initiation assembly and the perforating gun are sequentially arranged at the lower end of the oil pipe, wherein the oil pipe nipple is arranged at the lower end of the oil pipe, the isolation oil pipe is arranged at the lower end of the oil pipe nipple, the ball throwing initiation assembly is arranged at the lower end of the isolation oil pipe, and the perforating gun is arranged at the lower end of the ball throwing initiation assembly.
In one possible implementation, the method further includes:
and after the perforating device is aligned to the target layer, the perforating gun is detonated through the ball-throwing detonating assembly, so that the perforating gun perforates the target layer.
In one possible implementation, the ball striking initiation assembly includes a detonator firing pin and a pressure shear member, the firing of the perforating gun by the ball striking initiation assembly includes:
the steel ball is put into the oil pipe through a pump truck, so that the steel ball blocks the upper end of the pressure shearing component;
pressing the oil pipe to a preset pressure through a pump truck to shear the shearing pin on the pressure shearing component;
after the shearing pin is sheared, the detonator firing pin falls down to detonate the perforating gun.
In one possible implementation, the adjusting the length of the tubing based on the log and the length of the isolated tubing to align the perforating device with the target layer includes:
determining a second depth of the tubing nipple based on the log;
determining a third depth of the perforating device based on the second depth and the length of the isolation tubing;
and adjusting the length of the oil pipe based on the difference value between the third depth and the first depth to enable the perforating device to be aligned with the target layer.
In one possible implementation, the logging curve includes a first natural gamma curve including gamma values for a plurality of sampling points of the construction well and a first tubing collar curve including collar values for the plurality of sampling points;
the determining a second depth of the tubing nipple based on the log comprises:
for each sampling point in the first natural gamma curve, acquiring a depth value of the sampling point from a logging interpretation curve of the construction well, wherein the logging interpretation curve is a natural gamma curve marking the depths of the plurality of sampling points;
marking the depth value of the sampling point on the first tubing coupling curve to obtain a second tubing coupling curve;
and determining a target sampling point from the second tubing coupling curve, wherein the depth of the target sampling point is used as the second depth of the tubing nipple, and the target sampling point is a sampling point with a coupling value subjected to preset fluctuation.
In one possible implementation, the determining the third depth of the perforating device is based on the second depth and a length of the isolation tubing;
and determining the sum of the second depth and the length of the isolation oil pipe as a third depth of the perforating device.
In one possible implementation, the adjusting the length of the tubing based on the difference between the third depth and the first depth to align the perforating device with the destination layer includes:
if the difference value is positive, reducing the length of the oil pipe corresponding to the difference value to enable the perforating device to be aligned to the target layer;
if the difference is negative, increasing the length of the oil pipe corresponding to the difference, so that the perforating device is aligned to the target layer.
In one possible implementation, the measuring, by the logging instrument, a log of the construction well after the logging instrument reaches the tubing nipple includes:
lifting the logging instrument after the logging instrument reaches the oil pipe nipple;
and measuring a logging curve of the construction well through the logging instrument in the lifting process of the logging instrument.
In one possible implementation manner, the step of lowering the logging instrument into the oil pipe, if the logging instrument encounters resistance in the oil pipe, pushing the logging instrument to the short section of the oil pipe by injecting liquid into the oil pipe includes:
measuring a third tubing collar curve of the construction well by the logging instrument during the running of the logging instrument into the tubing;
if the coupling value of the third tubing coupling curve at the second target depth is unchanged, determining that the logging instrument encounters resistance at the second target depth;
and if the coupling value of the third tubing coupling curve at the third target depth fluctuates in a preset manner, determining that the third target depth is the tubing nipple.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
the embodiment of the application provides a depth correction method for oil pipe transmission perforation, wherein when a logging instrument encounters resistance in an oil pipe which is lowered into the method, the logging instrument can be pushed to a short section of the oil pipe by injecting liquid into the oil pipe, so that the length of the oil pipe can be accurately measured through a logging curve of a construction well measured by the logging instrument, and the length of the oil pipe can be accurately adjusted based on the logging curve, so that a perforating device is aligned to a target layer; therefore, the method can enable the perforating device to be accurately aligned with the target layer, and further can improve the accuracy of the perforating device to perforate the target layer.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a depth correction method for oil pipe transmission perforation according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
The terms "first," "second," "third," and "fourth" and the like in the description and in the claims and drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprising," "including," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
The application provides a depth correction method of oil pipe transmission perforation, referring to fig. 1, the method comprises the following steps:
step 101: and the oil pipe nipple, the isolation oil pipe and the perforating device are sequentially arranged at the lower end of the oil pipe.
Wherein the perforating device comprises a perforating gun and a ball-throwing detonation assembly.
In the step, an oil pipe nipple, an isolation oil pipe, a ball injection initiation assembly and a perforating gun are sequentially arranged at the lower end of the oil pipe; wherein, oil pipe nipple installs in oil pipe's lower extreme, keeps apart oil pipe and installs in oil pipe nipple's lower extreme, throws ball initiating component and installs in isolating oil pipe's lower extreme, and the perforating gun is installed in the lower extreme of throwing ball initiating component.
The oil pipe nipple is used for marking the position of the perforating device, and the isolation oil pipe is used for connecting the oil pipe nipple and the perforating device; the length of the oil pipe nipple is short and can be ignored, the length of the isolation oil pipe can be set and changed according to the needs, and in the embodiment of the application, the length is not particularly limited; for example, the length of the isolation tubing may be 20-30 meters.
The connection mode between the oil pipe and the oil pipe nipple, the connection mode between the oil pipe nipple and the isolation oil pipe, the connection mode between the isolation oil pipe and the ball injection initiation assembly and the connection mode between the ball injection initiation assembly and the perforating gun can be threaded connection.
Step 102: and (5) lowering the oil pipe into the construction well.
Wherein, the oil pipe can be lowered into the construction well through the crane; the length of the tubing matches the first depth of the destination layer to be perforated.
The target layer to be perforated is an oil-gas storage layer or an oil storage layer for storing oil gas, and the first depth of the target layer can be obtained from logging information of a construction well.
The first depth of the target layer to be perforated is larger than the length of the oil pipe and is equal to the sum of the length of the oil pipe and the length of the isolation oil pipe.
The construction well can be a low-inclination well with the well inclination smaller than 60 degrees, a high-inclination well with the well inclination larger than 60 degrees or a horizontal well.
Step 103: and (3) putting the logging instrument into the oil pipe, and pushing the logging instrument to the short section of the oil pipe by injecting liquid into the oil pipe if the logging instrument is blocked in the oil pipe.
The logging instrument is arranged in the oil pipe through the logging cable and is used for measuring the logging curve of the construction well.
The liquid can be any liquid, for example, the liquid can be water, the water can meet the requirement of generating driving force at the bottom of the well, the water is cheap and easy to obtain, the components are simple, and the pollution or corrosion to the construction well can be avoided. After the logging instrument encounters resistance in the oil pipe, water is injected into the oil pipe through the pump truck in a certain displacement mode, so that the logging instrument generates a piston effect in the oil pipe, and the logging instrument can be pushed to continue to descend through the pushing force generated by the piston effect until the logging instrument is pushed to the short section of the oil pipe.
Because the logging instrument descends by the dead weight of the logging instrument and the logging cable in the process of descending the oil pipe, if the target layer to be perforated is positioned at a position with well deviation smaller than 60 degrees, the logging instrument can directly descend to the target layer; if the target layer to be perforated is located at a position with well deviation larger than 60 degrees, the gravity component force of the logging instrument and the logging cable downwards in the vertical direction is increased, so that the friction force is overlarge, the logging instrument and the logging cable cannot descend, the logging instrument cannot descend to the target layer, namely, the logging instrument cannot descend to the target layer by means of the gravity of the logging instrument and the logging cable, and further the logging instrument cannot measure the logging curve of the target layer. In the embodiment of the application, when the logging instrument runs down at the position with the well deviation larger than 60 degrees and encounters resistance, the logging instrument can be pushed to the short section of the oil pipe by injecting liquid into the oil pipe, so that the logging instrument can measure the logging curve of the target layer.
Measuring a third tubing coupling curve of the construction well through the logging instrument in the process of putting the logging instrument into the tubing; the third tubing collar curve includes collar values for a plurality of sampling points.
In one possible implementation, if the third tubing collar curve does not change in collar value at the second target depth, it is determined that the logging instrument encounters resistance at the second target depth.
The third tubing coupling curve is measured in the descending process of the logging instrument, if the logging instrument descends smoothly all the time, the third tubing coupling curve extends downwards in the longitudinal direction, if the coupling value of the third tubing coupling curve at the second target depth is unchanged, namely the third tubing coupling curve does not extend downwards in the longitudinal direction, the logging instrument is not descending any more, the logging instrument is determined to be blocked at the second target depth, and therefore the descending condition of the logging instrument in the tubing can be judged rapidly and intuitively through the third tubing coupling curve, and the construction operation can be adjusted timely.
In another possible implementation, if the third tubing coupling curve exhibits a preset fluctuation in coupling value at a third target depth, the third target depth is determined to be the tubing nipple.
Wherein the preset ripple is a lateral ripple generated by the coupling value at a depth on the third coupling curve due to the coupling value at the depth being greater than the coupling values at the depths above and below.
The logging instrument measures a third tubing coupling curve in the descending process, and logging response characteristics of the third tubing coupling curve can occur at the tubing nipple, namely preset fluctuation of coupling values occurs on the third tubing coupling curve; if the coupling value on the third tubing coupling curve fluctuates in advance, the logging instrument is stopped from continuing to descend when the logging instrument reaches the tubing nipple, so that whether the logging instrument reaches the tubing nipple can be quickly and intuitively judged through the third tubing coupling curve, and the construction operation can be timely adjusted.
Step 104: and measuring the logging curve of the construction well through the logging instrument after the logging instrument reaches the short section of the oil pipe.
This step can be achieved by the following steps (1) - (2):
(1) After the logging instrument reaches the short section of the oil pipe, the logging instrument is lifted.
Wherein the logging instrument is lifted by a logging cable.
(2) During lifting of the logging instrument, the logging instrument is used for measuring the logging curve of the construction well.
The logging instrument is in the process of being put into the oil pipe, the logging instrument and the logging cable are in descending weight, and the logging cable is easy to curl and wind, so that the third oil pipe coupling curve measured by the logging instrument can only qualitatively judge the descending condition of the logging instrument and whether the logging instrument reaches the short section of the oil pipe; in the process of lifting the logging instrument on the logging cable, the logging cable is in a straightened state, so that the logging instrument can accurately measure the logging curve, and the measured logging curve is high in accuracy.
Step 105: based on the log and the length of the isolation tubing, the length of the tubing is adjusted to align the perforating device to the target layer.
This step can be achieved by the following steps (1) - (3):
(1) A second depth of the tubing nipple is determined based on the log.
The logging curve comprises a first natural gamma curve and a first tubing coupling curve, wherein the first natural gamma curve comprises gamma values of a plurality of sampling points of a construction well, and the first tubing coupling curve comprises coupling values of the plurality of sampling points.
The positions of the plurality of sampling points of the first natural gamma curve are the same as the positions of the plurality of sampling points of the first tubing coupling curve; the positions of the plurality of sampling points may be set and changed as needed, and are not particularly limited herein.
This step can be achieved by the following steps A1-A3:
a1: for each sampling point in the first natural gamma curve, acquiring a depth value of the sampling point from a logging interpretation curve of the construction well; the well logging interpretation curve is a natural gamma curve marking the depths of a plurality of sampling points.
The positions of the plurality of sampling points in the well logging interpretation curve are the same as those of the plurality of sampling points in the first natural gamma curve, namely the depths of the plurality of sampling points in the well logging interpretation curve are the same as those of the plurality of sampling points of the first natural gamma curve.
Since the natural gamma curve is used to reflect the total content of radionuclides in the formation, the natural gamma curve measured at any one time is the same. In this step, the first natural gamma curve is overlapped with the natural gamma curve on the log interpretation curve, so that the depth value of the sampling point in the first natural gamma curve can be obtained based on the depth value of the sampling point of the natural gamma curve in the log interpretation curve.
A2: and marking the depth value of the sampling point on the first tubing coupling curve to obtain a second tubing coupling curve.
The depth value of each sampling point of the first natural gamma curve is the depth value of each sampling point of the first tubing coupling curve, and the obtained depth value of the sampling point of the first natural gamma curve is marked on the first tubing coupling curve, so that the tubing coupling curve marked with the depths of the sampling points can be obtained.
A3: and determining a target sampling point from the second tubing coupling curve, wherein the depth of the target sampling point is used as the second depth of the tubing nipple, and the target sampling point is a sampling point with a coupling value subjected to preset fluctuation.
(2) A third depth of the perforating device is determined based on the second depth and the length of the isolation tubing.
Wherein the sum of the second depth and the length of the isolation tubing is determined as a third depth of the perforating device.
(3) And adjusting the length of the oil pipe based on the difference value between the third depth and the first depth to enable the perforating device to be aligned with the target layer.
This step may be implemented by any one of the following implementations:
in one possible implementation, if the difference is positive, the tubing is reduced by the length corresponding to the difference to align the perforating device with the target layer.
If the difference is positive, it indicates that the perforating device is located below the target layer, and the oil pipe is cut to reduce the length corresponding to the difference, and after the oil pipe is cut short, the lifting of the perforating device is achieved, so that the perforating device is aligned to the target layer.
In another possible implementation, if the difference is negative, the tubing is increased by a length corresponding to the difference to align the perforating device with the target layer.
If the difference is negative, the perforating device is positioned above the target layer, and the oil pipe is connected with another oil pipe, so that the length corresponding to the difference is increased, and after the length of the oil pipe is increased, the perforating device is lowered, and then the perforating device is aligned to the target layer.
The operation time of the depth correction method of the oil pipe transmission perforation provided by the embodiment of the application is 4-6 hours. According to the depth correction method for the oil pipe transmission perforation, provided by the embodiment of the application, the logging instrument can be lowered to the oil pipe nipple, so that the logging instrument can measure the logging curve at the oil pipe nipple, the second depth of the oil pipe nipple can be determined based on the logging curve, and the third depth of the perforation device can be determined through the second depth of the oil pipe nipple and the length of the isolated oil pipe because the oil pipe nipple is connected with the perforation device through the isolated oil pipe, and the length of the oil pipe can be adjusted based on the error between the third depth and the first depth of the target layer, so that the perforation device can be aligned to the target layer through one-time correction. The method avoids the error of the length of the oil pipe caused by the error of the well track, the stretching of the pipe column and friction resistance to the depth of the corrected perforating device when the depth of the perforating device is corrected through the length of the oil pipe; therefore, the correction method provided by the embodiment of the application can be used for correcting depth once, saves time and labor, and greatly improves the accuracy and efficiency of perforation.
The embodiment of the application provides a depth correction method for oil pipe transmission perforation, wherein when a logging instrument encounters resistance in an oil pipe which is lowered into the method, the logging instrument can be pushed to a short section of the oil pipe by injecting liquid into the oil pipe, so that the length of the oil pipe can be accurately measured through a logging curve of a construction well measured by the logging instrument, and the length of the oil pipe can be accurately adjusted based on the logging curve, so that a perforating device is aligned to a target layer; therefore, the method can enable the perforating device to be accurately aligned with the target layer, and further can improve the accuracy of the perforating device to perforate the target layer.
In the embodiment of the present application, the perforation device can be aligned to the target layer through the steps 101 to 105; the embodiment of the application can also realize the perforation of the target layer by the perforation device through the following step 106.
Step 106: after the perforating device is aligned with the target layer, the perforating gun is detonated through the ball injection detonating assembly, so that the perforating gun perforates the target layer.
Wherein, the ball striking initiation assembly comprises a detonator firing pin and a pressure shearing component.
This step can be achieved by the following steps (1) - (3):
(1) The steel ball is put into the oil pipe through the pump truck, so that the steel ball blocks the upper end of the pressure shearing component.
Before the steel ball is put into the oil pipe, a christmas tree is arranged at the wellhead of the construction well, after the steel ball passes through the christmas tree and enters the oil pipe, the steel ball is pumped to the upper end of the pressure shearing component by a pump truck, so that the steel ball blocks the upper end of the pressure shearing component.
The pressure monitoring device monitors the pressure in the oil pipe, and the pressure monitoring device displays that the pressure in the oil pipe is raised, so that the steel ball reaches the upper end of the pressure shearing component.
(2) And pressing the oil pipe to a preset pressure through a pump truck to shear the shearing pin on the pressure shearing component.
After the pressure monitoring device displays that the oil pipe is pressurized, the oil pipe is continuously pressurized to a preset pressure through the pump truck, and the preset pressure can enable the shearing pin on the fracturing shearing component to be sheared.
When the pressure of the upper end face of the fracturing shearing component reaches the preset pressure, the shearing pin on the fracturing shearing component is sheared under the preset pressure due to the pressure difference between the upper end face of the pressure shearing component and the lower end face of the pressure shearing component.
(3) After the shearing pin is sheared, the detonator firing pin falls down to detonate the perforating gun.
Wherein, the detonator firing pin is used for detonating the perforating gun; before the shearing pin is sheared, the detonator firing pin is fixed above the perforating gun through the pressure shearing pin, after the shearing pin is sheared, the detonator firing pin is unlocked, the detonator firing pin falls down, and the perforating gun is detonated to perforate a target layer.
The ball injection initiation assembly is provided with a circulation hole, and is used for enabling liquid to flow out of the oil pipe through the circulation hole when the logging instrument is pushed to descend in the oil pipe by the liquid, and is used as a production channel of an oil-gas layer after perforation operation is completed.
When the well inclination is larger than 60 degrees, the detonation device ignited by pressure is generally adopted to detonate the perforating gun to perforate the target layer, and when the fluctuation pressure at the bottom of the well reaches the set pressure of the action of the detonation device, the detonation device acts to detonate the perforating gun. Because the depth correction method provided by the embodiment of the application adopts a hydraulic pumping mode through the pump truck to push the logging instrument to the short section of the oil pipe, a certain pumping pressure exists in the oil pipe, meanwhile, liquid is influenced by factors such as the channel diameter, liquid friction, channel blockage and the like, pressure fluctuation can be generated at the bottom of the well, and thus, false perforation is caused, and huge loss and well control risk are brought. The ball throwing detonation assembly is adopted to detonate the perforating gun, and after the perforating device is aligned to the target layer, the steel ball is thrown into the well to hold pressure, so that the ball throwing detonation assembly acts to detonate the perforating gun, and therefore, the ball throwing detonation assembly does not accidentally detonate the perforating gun due to high pressure generated by bottom hole pressure fluctuation before no ball throwing operation, is a safe pressure detonation device, greatly reduces the risk of false perforation in the pumping logging instrument process, avoids loss caused by false perforation, and improves the efficiency of perforation operation.
The embodiment of the application provides a depth correction method for oil pipe transmission perforation, wherein when a logging instrument encounters resistance in an oil pipe which is lowered into the method, the logging instrument can be pushed to a short section of the oil pipe by injecting liquid into the oil pipe, so that the length of the oil pipe can be accurately measured through a logging curve of a construction well measured by the logging instrument, and the length of the oil pipe can be accurately adjusted based on the logging curve, so that a perforating device is aligned to a target layer; therefore, the method can enable the perforating device to be accurately aligned with the target layer, and further can improve the accuracy of the perforating device to perforate the target layer.
The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but rather, the application is to be construed as limited to the appended claims.
Claims (8)
1. A method of depth correction of tubing conveyed perforations, the method comprising:
sequentially installing an oil pipe nipple, an isolation oil pipe and a perforating device at the lower end of the oil pipe;
the oil pipe is lowered into a construction well, wherein the length of the oil pipe is matched with the first depth of a target layer to be perforated;
a logging instrument is put into the oil pipe, and if the logging instrument meets resistance in the oil pipe, the logging instrument is pushed to the short section of the oil pipe by injecting liquid into the oil pipe;
measuring a logging curve of the construction well through the logging instrument after the logging instrument reaches the oil pipe nipple, wherein the logging curve comprises a first natural gamma curve and a first oil pipe coupling curve, the first natural gamma curve comprises gamma values of a plurality of sampling points of the construction well, and the first oil pipe coupling curve comprises coupling values of the plurality of sampling points;
based on the logging curve and the length of the isolation oil pipe, adjusting the length of the oil pipe to enable the perforating device to be aligned with the target layer;
wherein, based on the log and the length of the isolation oil pipe, adjusting the length of the oil pipe to align the perforating device with the target layer, comprising:
determining a second depth of the tubing nipple based on the log;
determining a third depth of the perforating device based on the second depth and the length of the isolation tubing;
adjusting the length of the oil pipe based on the difference value between the third depth and the first depth to enable the perforating device to be aligned with the target layer;
wherein the determining the second depth of the tubing nipple based on the log comprises:
for each sampling point in the first natural gamma curve, acquiring a depth value of the sampling point from a logging interpretation curve of the construction well, wherein the logging interpretation curve is a natural gamma curve marking the depths of the plurality of sampling points;
marking the depth value of the sampling point on the first tubing coupling curve to obtain a second tubing coupling curve;
and determining a target sampling point from the second tubing coupling curve, wherein the depth of the target sampling point is used as the second depth of the tubing nipple, and the target sampling point is a sampling point with a coupling value subjected to preset fluctuation.
2. The method of depth correction of tubing conveyed perforations of claim 1, wherein the perforating device comprises a perforating gun and a ball-casting initiation assembly;
install oil pipe nipple joint, isolation oil pipe and perforating device in proper order in oil pipe's lower extreme, include:
the oil pipe nipple, the isolation oil pipe, the ball throwing initiation assembly and the perforating gun are sequentially arranged at the lower end of the oil pipe, wherein the oil pipe nipple is arranged at the lower end of the oil pipe, the isolation oil pipe is arranged at the lower end of the oil pipe nipple, the ball throwing initiation assembly is arranged at the lower end of the isolation oil pipe, and the perforating gun is arranged at the lower end of the ball throwing initiation assembly.
3. The depth correction method for tubing conveyed perforations of claim 2, further comprising:
and after the perforating device is aligned to the target layer, the perforating gun is detonated through the ball-throwing detonating assembly, so that the perforating gun perforates the target layer.
4. A depth correction method for tubing conveyed perforations as claimed in claim 3 wherein said shot blasting assembly includes a detonator firing pin and a pressure shear member, said firing of said perforating gun by said shot blasting assembly comprising:
the steel ball is put into the oil pipe through a pump truck, so that the steel ball blocks the upper end of the pressure shearing component;
pressing the oil pipe to a preset pressure through a pump truck to shear the shearing pin on the pressure shearing component;
after the shearing pin is sheared, the detonator firing pin falls down to detonate the perforating gun.
5. The method of depth correction of tubing conveyed perforations of claim 1, wherein said determining a third depth of the perforating device based on the second depth and the length of the isolated tubing comprises:
and determining the sum of the second depth and the length of the isolation oil pipe as a third depth of the perforating device.
6. The method of depth correction for tubing conveyed perforations of claim 1, wherein adjusting the length of the tubing based on the difference between the third depth and the first depth to align the perforating device with the layer of interest comprises:
if the difference value is positive, reducing the length of the oil pipe corresponding to the difference value to enable the perforating device to be aligned to the target layer;
if the difference is negative, increasing the length of the oil pipe corresponding to the difference, so that the perforating device is aligned to the target layer.
7. The method of depth correction of tubing conveyed perforations of claim 1, wherein measuring a log of the construction well by the logging instrument after the logging instrument reaches the tubing nipple comprises:
lifting the logging instrument after the logging instrument reaches the oil pipe nipple;
and measuring a logging curve of the construction well through the logging instrument in the lifting process of the logging instrument.
8. The method of depth correction of tubing conveyed perforations of claim 1, wherein the lowering a logging instrument into the tubing, if the logging instrument encounters a blockage in the tubing, pushing the logging instrument to the tubing nipple by injecting a liquid into the tubing, comprises:
measuring a third tubing collar curve of the construction well by the logging instrument during the running of the logging instrument into the tubing;
if the coupling value of the third tubing coupling curve at the second depth is unchanged, determining that the logging instrument encounters resistance at the second depth;
and if the coupling value of the third tubing coupling curve at the third depth is subjected to preset fluctuation, determining that the third depth is the tubing nipple.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690218A (en) * | 1986-04-03 | 1987-09-01 | Halliburton Company | Method for depth control and detonation of tubing conveyed gun assembly |
| CN102278098A (en) * | 2011-08-12 | 2011-12-14 | 中国石油天然气股份有限公司 | Method for realizing accurate directional perforation by adopting cable transmission |
| CN103410484A (en) * | 2013-08-07 | 2013-11-27 | 中国石油化工股份有限公司 | Small-diameter tubular pump pump-passing depth checking perforating and pumping combined production method |
| CN205977150U (en) * | 2016-08-29 | 2017-02-22 | 天津统晟石油科技有限公司 | Punching cable logging carries technology tubular column in horizontal well coiled tubing |
| CN106593382A (en) * | 2017-02-09 | 2017-04-26 | 撒占东 | Method for collecting natural gas from producing well |
-
2021
- 2021-03-10 CN CN202110260459.5A patent/CN115075782B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690218A (en) * | 1986-04-03 | 1987-09-01 | Halliburton Company | Method for depth control and detonation of tubing conveyed gun assembly |
| CN102278098A (en) * | 2011-08-12 | 2011-12-14 | 中国石油天然气股份有限公司 | Method for realizing accurate directional perforation by adopting cable transmission |
| CN103410484A (en) * | 2013-08-07 | 2013-11-27 | 中国石油化工股份有限公司 | Small-diameter tubular pump pump-passing depth checking perforating and pumping combined production method |
| CN205977150U (en) * | 2016-08-29 | 2017-02-22 | 天津统晟石油科技有限公司 | Punching cable logging carries technology tubular column in horizontal well coiled tubing |
| CN106593382A (en) * | 2017-02-09 | 2017-04-26 | 撒占东 | Method for collecting natural gas from producing well |
Non-Patent Citations (1)
| Title |
|---|
| 川西地区复杂水平井泵送电缆释放测井工艺;赵雷;《石油钻探技术》;第43卷(第6期);第66-69页 * |
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