CN105888653B - A kind of multistage pressure break horizontal well tracer groundwater prospecting method - Google Patents
A kind of multistage pressure break horizontal well tracer groundwater prospecting method Download PDFInfo
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- CN105888653B CN105888653B CN201610296469.3A CN201610296469A CN105888653B CN 105888653 B CN105888653 B CN 105888653B CN 201610296469 A CN201610296469 A CN 201610296469A CN 105888653 B CN105888653 B CN 105888653B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/11—Locating fluid leaks, intrusions or movements using tracers; using radioactivity
Abstract
The invention belongs to multistage pressure break horizontal well water exploration technical fields, and in particular to a kind of multistage pressure break horizontal well tracer groundwater prospecting method, including following content: according to horizontal well hole condition, screen tracer；By the tracer screened with carrying out horizontal well performance testing in tubing and casing lower going-into-well；Opening well and making production test, takes well head fluid sample, to the classification of production fluid indicator, purification, analysis and processing, is changed by tracer concentration, understands each section of water outlet status.This multistage pressure break horizontal well tracer groundwater prospecting method, by having the production fluid ground test of tracer, each section of productions regimen condition is analyzed, realizes that horizontal well water exploration technology tubing string is simple with easy to operateization, have the characteristics that quickly and efficiently, improve the standard well water detection measuring accuracy and efficiency.This groundwater prospecting method in use, does not affect the normal production, and test can obtain as a result, and can to test multistage, period simultaneously short, high-efficient after sampling.
Description
Technical field
The invention belongs to multistage pressure break horizontal well water exploration technical fields, and in particular to a kind of multistage pressure break horizontal well tracer is looked for
Water method.
Background technique
The unconventional petroleum resources such as hypotonic, Oil in Super-low Permeability are that the important energy in China takes over reserves, such oil reservoir have low hole,
Hypotonic feature, natural production capacity is lower, and stable yields condition is poor, and most of well will pass through sand fracturing before going into operation.In recent years, horizontal
Well multistage fracture technology is advanced by leaps and bounds, it has also become the key technology of effective exploitation is realized in such oil field, major low in China
Infiltration oil field is all widely used.
It is well known that water filling is supplement stratum energy, the important measures of oil recovery rate are improved, in hypotonic, ultralow permeability
Field is no exception.However, the low permeability oil field pressure break horizontal well of waterflooding extraction starts gradually to go out with the extension of development time
Water seriously affects oil field and normally develops, it is necessary to suitable water detection, water blockoff measure is taken, to restore oil well productivity.
Currently, technical way has to be connected between mechanical packing water detection, liquid producing profile log, well in terms of horizontal well water exploration
Means, every technologies such as general character analysis, the well logging of coiled tubing handling cable, numerical simulation have certain application at the scene, are water
Horizontal well water detection, water blockoff provide effective technological guidance.
But some technologies are studied carefully, and process is cumbersome, the period is long, at high cost, such as the analysis of numerical simulation, inter well connectivity, pair having
Downhole instrument height relies on, such as downhole flowmeter, well logging pipe string, increases the uncertain factor and construction risk of water detection.State
Outer horizontal well water exploration mainly uses production logging method, but must mating dedicated go into the well tool and means of interpretation, and to pit shaft situation,
Well section yield has higher requirement, and testing expense is higher；Domestic horizontal well machinery water detection technology mainly uses packer card to seal
Be segmented production method, there are working procedures it is complicated, test period is long the disadvantages of.
Summary of the invention
The purpose of the present invention is overcome existing level well water detection technical costs height, low efficiency, period long, construction complexity etc. to ask
Topic.
For this purpose, including the following steps: the present invention provides a kind of multistage pressure break horizontal well tracer groundwater prospecting method
Step 1: according to horizontal well hole condition, tracer is screened；
Step 2: by the tracer screened with carrying out horizontal well performance testing in tubing and casing lower going-into-well；
Step 3: opening well and making production test takes well head fluid sample, to the classification of production fluid indicator, purification, analysis and place
Reason, is changed by tracer concentration, understands each section of water outlet status.
The species number of the tracer screened in the step one is identical as pressure break number of segment, and the tracer screened meets same
System tracer type is more, the harmless stabilization of physicochemical properties, dispensing chemical examination is easy to operate, slow release speed is controllable.
The tracer screened in the step one is a variety of in water-soluble group of the lanthanides tracer.
Tracer is gone into the well with tubing and casing and is comprised the following processes in the step two:
(1) according to the specific requirement of test temperature, pressure, number of segment, with the tracer production tracer sustained release patch screened
Piece or block are spare；
(2) processing can place the support cylinder pipe nipple of tracer slow-release paster or block, and support cylinder is placed in each section of packer card
In the oil jacket annulus of envelope；
(3) former tubing string being risen, number of segment is tested according to down-hole pressure station interval and every time tubing string, cylinder pipe nipple is held in the palm in connection,
And different types of tracer slow-release paster or block are put into support cylinder；
(4) by tracer slow-release paster or block with carrying out next step test in tubing string lower going-into-well.
The production of tracer slow-release paster or block is according to temperature, pressure design tracer temperature control in the process (1)
Degradation coating, can be discharged by command speed, and the tracer slow-release paster of production or the type of block are determined according to number of segment.
Test number of segment is identical as the species number of the support cylinder pipe nipple number of connection and tracer in the process (3), will not
With tracer be respectively put into the support cylinder in each oil jacket annulus Nei after in tubing string lower going-into-well.
The step three opening well and making production test is realized by following process:
Act original production tubing string, lower dragging tubing string card envelope, annular space placement tracer slow-release paster between packer, from the
One section drags water detection to N sections step by step, by passing through tracer concentration to the classification of production fluid indicator, purification, analysis and processing
Variation understands each section of water outlet status.
The step three opening well and making production test is realized by following process:
Act original production tubing string, lower fixed tubular column card seals water detection, and it is slow that card envelope position annular space places different tracers
Patch is released, by changing by tracer concentration to the classification of production fluid indicator, purification, analysis and processing, understands each section of water outlet
Situation.
Changed in the step three by tracer concentration, understand each section of water outlet status detailed process are as follows: to specified
Production fluid in time is analyzed, the content of each indicator in total amount and production fluid including production fluid, in conjunction with tracer
The rate of release of slow-release paster or block acquires the water yield of the corresponding water exit end of each indicator ratio shared in production fluid
Example, then acquires the size of each section of water yield.
Beneficial effects of the present invention: this multistage pressure break horizontal well tracer groundwater prospecting method provided by the invention, by having
The production fluid ground test of tracer analyzes each section of production regimen condition, realizes that horizontal well water exploration technology tubing string is simply and easy to operate
Change, has the characteristics that quickly and efficiently, improve the standard well water detection measuring accuracy and efficiency.This groundwater prospecting method is in use process
In, it does not affect the normal production, test can obtain as a result, and can to test multistage, period simultaneously short, high-efficient after sampling.
Specific embodiment
Here is that the present invention is specifically described by embodiment, it is necessary to which indicated herein be the present embodiment is only this
The preferred embodiment of invention, is not intended to limit the invention in any way, all according to the technical essence of the invention to following embodiment institute
Any simple modification of work, change and equivalent structural changes, are still within the scope of the technical scheme of the invention.
Embodiment 1:
The present embodiment provides a kind of multistage pressure break horizontal well tracer groundwater prospecting methods, include the following steps:
Step 1: according to horizontal well hole condition, tracer is screened；
Step 2: by the tracer screened with carrying out horizontal well performance testing in tubing and casing lower going-into-well；
Step 3: opening well and making production test takes well head fluid sample, to the classification of production fluid indicator, purification, analysis and place
Reason, is changed by tracer concentration, understands each section of water outlet status.
The problems such as present invention is for current horizontal well water exploration technical costs height, low efficiency, period length, construction complexity, proposes
This multistage pressure break horizontal well tracer water detection technology, not against downhole testing instrument, by the production fluid ground for having tracer
Each section of production regimen condition is analyzed in test, realizes that horizontal well water exploration technology tubing string simply with easy to operateization, has quickly and efficiently
Feature, improve the standard well water detection measuring accuracy and efficiency.
Such method can get rid of the limitation of downhole testing instrument, by production fluid ground test, analyze each section of production regimen condition,
Tubing string is simple, easy to operate, quick.Not against downhole testing instrument, by having the production fluid ground test of tracer, analysis
Each section of production regimen condition realizes that horizontal well water exploration technology tubing string simply with easy to operateization, has the characteristics that quickly and efficiently, to improve
Horizontal well water exploration measuring accuracy and efficiency.
Embodiment 2:
The present embodiment specifically refines the step in above-described embodiment 1, wherein
Tracer is screened in step 1 to comprise the following processes:
(1) it is suitble to according to the data information primary election of lithology, oiliness, reservoir temperature, pressure, well completion type, pressure break number of segment
Tracer；
(2) temporarily stifled performance test is carried out, the comparative analysis of oil field tracer is carried out, screens the tracer of primary election in above-mentioned (1)
Agent, it is desirable that, physicochemical properties harmless stabilization more with system tracer type, dispensing chemical examination is easy to operate, slow release speed is controllable,
It is herein existing method, is not specifically noted herein.
In screening step in the present embodiment basis based on operating experience, staff completely can according to lithology,
Oiliness, reservoir temperature, pressure, well completion type, with the suitable tracer of micro-judgment primary election, then by temporarily blocking up performance test
More symbol the system of contracts tracer type is filtered out from the tracer of primary election, the harmless stabilization of physicochemical properties, launches chemical examination behaviour
Make easy, the controllable feature of slow release speed tracer, for example water-soluble group of the lanthanides tracer, this kind of tracers are just able to satisfy operation
It is required that the species number of the tracer finally screened is identical as pressure break number of segment.
Tracer is gone into the well with tubing and casing and is comprised the following processes in step 2:
(1) according to the specific requirement of test temperature, pressure, number of segment, with the tracer production tracer sustained release patch screened
Piece or block are spare；The production of tracer slow-release paster or block is to make it according to temperature, pressure design tracer temperature control degradation coating
It can be discharged by command speed, rate of release herein is determined according to field demand, records tracer in a unit time herein
Burst size, the water yield of this section of unit time is inferred by the burst size；The tracer sustained release of production is determined according to number of segment
The type of the type of patch or block, tracer slow-release paster or block is identical as number of segment.
(2) processing can place the support cylinder pipe nipple of tracer slow-release paster or block, and support cylinder is placed in each section of packer card
In the oil jacket annulus of envelope；It is required that tracer slow-release paster or block, which place firm, support cylinder, does not increase tubing string outer diameter and can be with reservoir stream
Fluid contacts out.
(3) former tubing string being risen, number of segment is tested according to down-hole pressure station interval and every time tubing string, cylinder pipe nipple is held in the palm in connection,
And different types of tracer slow-release paster or block are put into support cylinder.Test support cylinder pipe nipple number and the tracer of number of segment and connection
The species number of agent is identical, with tubing string lower going-into-well after different tracers is respectively put into the support cylinder in each oil jacket annulus
In.
(4) by tracer slow-release paster or block with carrying out next step test in tubing string lower going-into-well.
The test of step 3 opening well and making production can be realized by following process:
Act original production tubing string, lower dragging tubing string card envelope, annular space placement tracer slow-release paster between packer, from the
One section drags water detection to N sections step by step, by passing through tracer concentration to the classification of production fluid indicator, purification, analysis and processing
Variation understands each section of water outlet status.
The test of step 3 opening well and making production can also be realized by following process:
Act original production tubing string, lower fixed tubular column card seals water detection, and it is slow that card envelope position annular space places different tracers
Patch is released, by changing by tracer concentration to the classification of production fluid indicator, purification, analysis and processing, understands each section of water outlet
Situation.
Changed in step 3 by tracer concentration, understands each section of water outlet status detailed process are as follows: within a specified time
Production fluid analyzed, the content of each indicator in total amount and production fluid including production fluid, in conjunction with tracer be sustained paste
The rate of release of piece or block acquires the water yield of the corresponding water exit end of each indicator ratio shared in production fluid, then
Acquire the size of each section of water yield.
Embodiment 3:
For the content of above-mentioned two embodiment, the present embodiment provides this multistage pressure break horizontal well tracer of the invention and looks for
The detailed process of water method, process are specific as follows:
(1) shown according to what the data primary election such as lithology, oiliness, reservoir temperature, pressure, well completion type, pressure break number of segment were suitble to
Track agent；
(2) it is screened by the comparative analysis of oil field tracer, it is desirable that the more, physical chemistry with system tracer type
The harmless stabilization of matter launches the features such as chemical examination is easy to operate, slow release speed is controllable；
(3) according to specific requirements such as test temperature, pressure, number of segment, it is spare to make tracer slow-release paster/block etc.；
(4) processing can place tracer slow-release paster/block support cylinder pipe nipple etc., and support cylinder is placed in each section of packer card envelope
In oil jacket annulus, it is desirable that tracer slow-release paster/block placement is firm, support cylinder does not increase tubing string outer diameter and can be with reservoir flowing out stream
Body contact；
(5) when testing, former tubing string is risen, number of segment, connection support is tested according to down-hole pressure station interval and every time tubing string
Cylinder pipe nipple, and different types of tracer slow-release paster/block is put into support cylinder；
(6) it by tracer slow-release paster/block lower going-into-well, is tested.There are many means for test process: 1 primary out
Tubing string is produced, lower dragging tubing string card seals, and annular space places tracer slow-release paster between packer, step by step from first segment to N sections
Water detection is dragged, by being changed by tracer concentration to the classification of production fluid indicator, purification, analysis and processing, each section is understood and goes out
Regimen condition；2 go out original production tubing string, and lower fixed tubular column card seals water detection, and it is slow that card envelope position annular space places different tracers
Patch is released, by changing by tracer concentration to the classification of production fluid indicator, purification, analysis and processing, understands each section of water outlet
Situation.
(7) opening well and making production takes well head fluid sample, to the classification of production fluid indicator, purification, analysis and processing, by showing
The variation of track agent concentration, understands each section of water outlet status, and high concentration tracer indicates that corresponding interval Liquid output is big, is discharged more.
In conclusion this multistage pressure break horizontal well tracer groundwater prospecting method of the invention, for current horizontal well water exploration skill
Art is at high cost, low efficiency, the period is long, constructs the problems such as complicated, not against downhole testing instrument, passes through the output for having tracer
Liquid ground test, analyze each section of productions regimen condition, realize horizontal well water exploration technology tubing string simply and easy to operateization, have quickly with
Efficient feature, improve the standard well water detection measuring accuracy and efficiency.The present invention is suitable for multistage pressure break horizontal well water exploration technology model
It encloses, technical advantage is significant, becomes increasingly conspicuous as multistage pressure break horizontal well produces water problems, before which will have preferable promote
Scape.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (1)
1. a kind of multistage pressure break horizontal well tracer groundwater prospecting method, which comprises the steps of:
Step 1: according to horizontal well hole condition, tracer is screened；
Step 2: by the tracer screened with carrying out horizontal well performance testing in tubing and casing lower going-into-well；
Step 3: opening well and making production test takes well head fluid sample；
The tracer screened in the step one is a variety of in water-soluble group of the lanthanides tracer；
Tracer is gone into the well with tubing and casing and is comprised the following processes in the step two:
(1) spare with the tracer production tracer slow-release paster or block that have screened；
(2) processing can place the support cylinder pipe nipple of tracer slow-release paster or block, and cylinder will be ask to be placed in each section of packer card envelope
In oil jacket annulus；
(3) former tubing string is risen, number of segment is tested according to down-hole pressure station interval and every time tubing string, cylinder pipe nipple is held in the palm in connection, and will
Different types of tracer slow-release paster or block are put into support cylinder；
(4) by tracer slow-release paster or block with carrying out next step test in tubing string lower going-into-well；
The production of tracer slow-release paster or block is degraded according to temperature, pressure design tracer temperature control in the process (1)
Coating, can be discharged by command speed, and the tracer slow-release paster of production or the type of block are determined according to number of segment；
Test number of segment is identical as the species number of the support cylinder pipe nipple number of connection and tracer in the process (3), will be different
Tracer be respectively put into the support cylinder in each oil jacket annulus Nei after in tubing string lower going-into-well；
The step three opening well and making production test is realized by following process:
Act original production tubing string, lower dragging tubing string card seals, and annular space places tracer slow-release paster between packer, from first segment
Water detection is dragged step by step to N sections, or acts original production tubing string, and lower fixed tubular column card seals water detection, and card envelope position annular space is put
Set different tracer slow-release pasters；By passing through tracer concentration to the classification of production fluid indicator, purification, analysis and processing
Variation understands each section of water outlet status；
Described is changed by tracer concentration, understands each section of water outlet status detailed process are as follows: to output within a specified time
Liquid is analyzed, the content of each indicator in total amount and production fluid including production fluid, in conjunction with tracer slow-release paster or block
Rate of release, acquire the water yield of the corresponding water exit end of each indicator ratio shared in production fluid, then acquire each
The size of section water yield；
This method analyzes each section of production regimen condition by the production fluid ground test with tracer, realizes horizontal well water exploration technology
Tubing string simply with easy to operateization, is suitable for multistage pressure break horizontal well water exploration technical scope.
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Effective date of registration: 20201027 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 710018 Shaanxi province Xi'an Weiyang Changqing Changqing prosperous Park District Building Room 1207 Patentee before: CHANGQING DOWNHOLE TECHNOLOGY OPERATION COMPANY OF CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. |