CN105760564A - Method and device for analyzing oil-string casing failure - Google Patents

Abstract

The embodiment of the invention discloses a method and device for analyzing oil-string casing failure and belongs to the technical field of well completion engineering safety of unconventional oil and gas resource exploitation.The method comprises the steps that geological parameters and engineering parameters of stratums of different depths within a preset range at the position where a target oil and gas well is located are obtained, information of a high-risk area of an oil-string casing of the oil and gas well is determined according to the geological parameters and the engineering parameters, dynamic crustal-stress change and rock stratum deformation situation in the fracturing process of the stratum where the high-risk area of the oil-string casing is located are obtained according to the geological parameters, the engineering parameters and the information of the high-risk area of the oil-string casing of the oil and gas well, and the deformation occurrence of the oil-string casing is determined based on the obtained dynamic crustal-stress change and the obtained rock stratum deformation situation.By the adoption of the method and the device for analyzing the oil-string casing failure, the accuracy of analysis conducted on the oil-string casing failure under large-scale segmented volume fracturing conditions can be improved.

Description

Analyze the method and apparatus that production string lost efficacy

Technical field

The present invention relates to unconventional petroleum resources exploitation Well Completion Engineering of Oil Reservoirs security technology area, analyze, particularly to a kind of, the method and apparatus that production string lost efficacy.

Background technology

In the process of the exploitation of unconventional petroleum resources, in order to improve the industrial production capacity of oil, natural gas etc., generally adopting fracture technology to improve the permeability of reservoir, volume fracturing technology can produce to stitch net on a large scale and be widely adopted in the earth formation.

Along with the application of volume fracturing technology, after reservoir is carried out volume fracturing, create the failure phenomenon of substantial amounts of Oil/gas Well production string, thus the production efficiency for oil, natural gas etc. causes tremendous influence.nullThe conventional method that production string carries out failure analysis is，Measure the geologic parameter on different depth stratum in the preset range of Oil/gas Well position，Such as the angle of inclination between adjacent earth formations、The Rock Species of Different Strata and lithology、The rock stress of Different Strata and intensity、Tomography in the preset range of Oil/gas Well present position、Production string hoop position、Completion parameter is (such as segmentation situation、Perforating site etc.) etc.，With production string-cement sheath-reservoir rock mass ring combined system for object of study，Mechanical characteristic during to production string and cement sheath in an ideal case by non uniform ground stress and uniform external and internal pressure combined effect is analyzed，And according to different pre-conditioned，Calculate production string under differently stress effect、Cement sheath internal stress and surface distribution of force，And cement sheath elastic modelling quantity can be analyzed、Cement thickness contacts the situation impact on production string distribution of force with production string，And then，Obtain the analysis result whether Oil/gas Well production string can occur to lose efficacy.

In the process realizing the present invention, inventor have found that prior art at least there is problems in that

The production string caused for volume fracturing lost efficacy; the impact that crustal stress and the rock deformation of inhomogeneous formation are slided by the huge and uneven transformation volume produced due to volume fracturing technology and the formation fracture seam net of complexity is extremely complex; it is bigger with the position difference that production string under other fracturing technique is likely to produce deformation that production string is likely to the position producing deformation; if using the analysis method that above-mentioned production string lost efficacy; the analysis result of the mistake often obtained; thus so that the accuracy being analyzed that Oil/gas Well production string was lost efficacy is poor.

Summary of the invention

In order to solve problem of the prior art, embodiments provide a kind of method and apparatus analyzing production string inefficacy.Described technical scheme is as follows:

First aspect, it is provided that a kind of method analyzing production string inefficacy, described method includes:

Obtain geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position, wherein, described geologic parameter includes the fault information in pendage angle, formation lithology section, the rock mechanics parameters section on stratum, the Original strata stress section on stratum and the preset range of described target Oil/gas Well present position, and described engineering parameter includes the wellbore trajectory of described target Oil/gas Well, cementing quality information, perforating site information, fracturing parameter, set damage positional information；

According to described geologic parameter and engineering parameter, it is determined that the information in the risk region occurred frequently of the production string of described target Oil/gas Well；

The information in the risk region occurred frequently of the production string according to described geologic parameter, engineering parameter and described target Oil/gas Well, obtain stratum crustal stress in fracturing process belonging to production string risk region occurred frequently dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of described production string deformation.

Alternatively, described according to described geologic parameter and engineering parameter, it is determined that the information in the risk region occurred frequently of the production string of described target Oil/gas Well, including:

According to described geologic parameter and engineering parameter, the production string failure comprehensive setting up described target Oil/gas Well analyzes plate, based on described comprehensive analysis plate, it is determined that the information in the risk region occurred frequently of the production string of described target Oil/gas Well；Wherein, described comprehensive analysis plate includes at least: wellbore trajectory, completion fracturing parameter, lithologic interpretation section, profile of geostress, rock mechanics section and set damage region.

Alternatively, the information in the risk region occurred frequently of the described production string according to described geologic parameter, engineering parameter and described target Oil/gas Well, obtain stratum crustal stress in fracturing process belonging to the risk region occurred frequently of described production string dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, determine the occurrence that described production string deforms, including:

Set up the reservoir reconstruction section three-dimensional finite element model at described target Oil/gas Well place, based on the model set up, described geologic parameter and engineering parameter, the risk region occurred frequently of the production string of described target Oil/gas Well is analyzed, obtain stratum crustal stress in fracturing process belonging to the risk region occurred frequently of described production string dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of described production string deformation.

Alternatively, the size of described three-dimensional finite element model is more than the size in the region that there is microseism signal, and described three-dimensional finite element model is configured by the non-average in stratum；Geologic parameter according to zones of different, the corresponding region in described three-dimensional finite element model arranges different original material attributes and initial in-site stress field；Described three-dimensional finite element model is arranged based on porous media model, and by fluid structurecoupling, carries out transient simulation；The result of calculation of transient simulation and micro-seismic monitoring data are combined closely, and by changing earth formation material attribute and in-place permeability, the region that matching formation breakdown is broken；Using perforation position as constant-pressure boundary, using bottom-hole treating pressure as pressure break size.

Alternatively, the occurrence of described production string deformation includes the displacement in the earth formation of described production string；

Described method also includes:

If it is determined that production string displacement in the earth formation more than or equal to default displacement, then send the cue that the production string of described target Oil/gas Well lost efficacy.

Second aspect, it is provided that a kind of device analyzing production string inefficacy, described device includes:

Acquisition module, for obtaining geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position, wherein, described geologic parameter includes the fault information in pendage angle, formation lithology section, the rock mechanics parameters section on stratum, the Original strata stress section on stratum and the preset range of described target Oil/gas Well present position, and described engineering parameter includes the wellbore trajectory of described target Oil/gas Well, cementing quality information, perforating site information, fracturing parameter, set damage positional information；

First determines module, for according to described geologic parameter and engineering parameter, it is determined that the information in the risk region occurred frequently of the production string of described target Oil/gas Well；

Second determines module, information for the risk region occurred frequently of the production string according to described geologic parameter, engineering parameter and described target Oil/gas Well, obtain stratum crustal stress in fracturing process belonging to production string risk region occurred frequently dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of described production string deformation.

Alternatively, described first determines module, is used for:

According to described geologic parameter and engineering parameter, the production string failure comprehensive setting up described target Oil/gas Well analyzes plate, based on described comprehensive analysis plate, it is determined that the information in the risk region occurred frequently of the production string of described target Oil/gas Well；Wherein, described comprehensive analysis plate includes at least: wellbore trajectory, completion fracturing parameter, lithologic interpretation section, profile of geostress, rock mechanics section and set damage region.

Alternatively, described second determines module, is used for:

Set up the reservoir reconstruction section three-dimensional finite element model at described target Oil/gas Well place, based on the model set up, described geologic parameter and engineering parameter, the risk region occurred frequently of the production string of described target Oil/gas Well is analyzed, obtain stratum crustal stress in fracturing process belonging to the risk region occurred frequently of described production string dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of described production string deformation.

Alternatively, the size of described three-dimensional finite element model is more than the size in the region that there is microseism signal, and described three-dimensional finite element model is configured by the non-average in stratum；Geologic parameter according to zones of different, the corresponding region in described three-dimensional finite element model arranges different original material attributes and initial in-site stress field；Described three-dimensional finite element model is arranged based on porous media model, and by fluid structurecoupling, carries out transient simulation；The result of calculation of transient simulation and micro-seismic monitoring data are combined closely, and by changing earth formation material attribute and in-place permeability, the region that matching formation breakdown is broken；Using perforation position as constant-pressure boundary, using bottom-hole treating pressure as pressure break size.

Alternatively, the occurrence of described production string deformation includes the displacement in the earth formation of described production string；

Described device also includes sending module, is used for:

If it is determined that production string displacement in the earth formation more than or equal to default displacement, then send the cue that the production string of described target Oil/gas Well lost efficacy.

The technical scheme that the embodiment of the present invention provides has the benefit that

nullIn the embodiment of the present invention，Obtain geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position，Wherein，Geologic parameter includes pendage angle、Formation lithology section、The rock mechanics parameters section on stratum、Fault information in the Original strata stress section on stratum and the preset range of target Oil/gas Well present position，Engineering parameter includes the wellbore trajectory of target Oil/gas Well、Cementing quality information、Perforating site information、Fracturing parameter、Set damages positional information，According to geologic parameter and engineering parameter，Determine the information in the risk region occurred frequently of the production string of target Oil/gas Well，According to geologic parameter、The information in the risk region occurred frequently of the production string of engineering parameter and target Oil/gas Well，Obtain the crustal stress on stratum belonging to production string risk region occurred frequently dynamically to change and rock deformation situation，Dynamically change and rock deformation situation based on the crustal stress got，Determine the occurrence that production string deforms，So，Can not only use geologic parameter，But also consider the impact that production string inefficacy is produced by engineering parameter，And then，Mode by qualitative analysis and quantitative analysis，When volume fracturing，Whether production string can be lost efficacy and be analyzed，Thus，Can improve the accuracy adopting the inefficacy of large-scale segmentation volume fracturing condition setting of casing production string to be analyzed.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme in the embodiment of the present invention, below the accompanying drawing used required during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is a kind of method flow diagram analyzing production string inefficacy that the embodiment of the present invention provides；

Fig. 2 is a kind of apparatus structure schematic diagram analyzing production string inefficacy that the embodiment of the present invention provides；

Fig. 3 is a kind of terminal structure schematic diagram that the embodiment of the present invention provides.

Detailed description of the invention

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

Embodiment one

The handling process of the method embodiments provides a kind of method analyzing production string inefficacy, as it is shown in figure 1, can comprise the following steps that

Step 101, obtain geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position, wherein, geologic parameter includes the fault information in pendage angle, formation lithology section, the rock mechanics parameters section on stratum, the Original strata stress section on stratum and the preset range of target Oil/gas Well present position, and engineering parameter includes the wellbore trajectory of target Oil/gas Well, cementing quality information, perforating site information, fracturing parameter, set damage positional information.

Step 102, according to geologic parameter and engineering parameter, it is determined that the information in the risk region occurred frequently of the production string of target Oil/gas Well.

Step 103, the information in the risk region occurred frequently of the production string according to geologic parameter, engineering parameter and target Oil/gas Well, obtain stratum crustal stress in fracturing process belonging to production string risk region occurred frequently dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of production string deformation.

nullIn the embodiment of the present invention，Obtain geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position，Wherein，Geologic parameter includes pendage angle、Formation lithology section、The rock mechanics parameters section on stratum、Fault information in the Original strata stress section on stratum and the preset range of target Oil/gas Well present position，Engineering parameter includes the wellbore trajectory of target Oil/gas Well、Cementing quality information、Perforating site information、Fracturing parameter、Set damages positional information，According to geologic parameter and engineering parameter，Determine the information in the risk region occurred frequently of the production string of target Oil/gas Well，According to geologic parameter、The information in the risk region occurred frequently of the production string of engineering parameter and target Oil/gas Well，Obtain the crustal stress on stratum belonging to production string risk region occurred frequently dynamically to change and rock deformation situation，Dynamically change and rock deformation situation based on the crustal stress got，Determine the occurrence that production string deforms，So，Can not only use geologic parameter，But also consider the impact that production string inefficacy is produced by engineering parameter，And then，Mode by qualitative analysis and quantitative analysis，When volume fracturing，Whether production string can be lost efficacy and be analyzed，Thus，Can improve the accuracy adopting the inefficacy of large-scale segmentation volume fracturing condition setting of casing production string to be analyzed.

Embodiment two

Embodiments providing a kind of method analyzing production string inefficacy, the executive agent of the method is terminal.Wherein, terminal can be any terminal, such as notebook computer etc..

Below in conjunction with detailed description of the invention, the handling process shown in Fig. 1 being described in detail, content can be such that

Step 101, obtain geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position, wherein, geologic parameter includes the fault information in pendage angle, formation lithology section, the rock mechanics parameters section on stratum, the Original strata stress section on stratum and the preset range of target Oil/gas Well present position, and engineering parameter includes the wellbore trajectory of target Oil/gas Well, cementing quality information, perforating site information, fracturing parameter, set damage positional information.

nullIn force，In order to exploit oil or natural gas from stratum，Multiple Oil/gas Well can be set in position，Can in the Oil/gas Well set under enter production string，And use some material (such as cement etc.)，Production string is fixed，Owing in stratum, the porosity of rock is generally less，Thus the exploitation for oil and natural gas brings difficulty，In order to improve production efficiency，Fracturing technique can be used，Increase the permeability of rock in stratum，Advantage due to volume fracturing technology，Transformation such as stratum is larger、Large-scale seam net etc. can be produced in the earth formation，Make volume fracturing technology become people and carry out the Main Means of stratum transformation，But，After stratum being transformed by volume fracturing technology，The rock in stratum can be made to be deformed sliding，And after seam net transformation uneven on a large scale，The crustal stress making stratum produces great variety before relatively transforming，Thus，Production string is deformed and lost efficacy，And then oil or gas extraction are brought difficulty.

nullIn order to avoid making production string lose efficacy due to volume fracturing，Before stratum is carried out volume fracturing，First the stratum of production string region can be analyzed，Find the position that production string may be caused to lose efficacy，Follow-up stratum (i.e. reservoir) is carried out volume fracturing time，The above-mentioned position found out can be carried out special handling，Such as，Use new fracturing parameter that this region is carried out frac treatment etc.，Specifically，Above-mentioned correlated process can be: when certain Oil/gas Well (i.e. target Oil/gas Well) is carried out production string failure analysis by needs，Can this Oil/gas Well position be the center of circle，Certain length is the border circular areas scope as target Oil/gas Well present position of radius，Wherein，Radius for above-mentioned border circular areas，Can be configured according to practical situation by technical staff，Can also be configured by carrying out the scope of volume fracturing every time.nullThen，Corresponding test instrunment can be used，Measure relevant geologic parameter and the engineering parameter of target Oil/gas Well，Geologic parameter may include that the angle of inclination between adjacent earth formations、The rock mechanics parameters section on stratum、The Original strata stress section on stratum，And the fault information etc. in the preset range of target Oil/gas Well present position，Wherein，Relevant formation angles tester can be passed through，Measure the angle of inclination between adjacent two stratum of different depth，Rock is taked on different stratum，Analyze the kind belonging to rock and feature，Such as，The color of rock、Composition、Structure、Cement、And cementation type、Special mineral etc.，The corresponding rock stress measuring apparatus measures Different Strata and rock strength can be used，Tomography in the preset range of target Oil/gas Well present position can be analyzed，Determine fault information，Pass through said process，Variation of lithological rule can be obtained、Rock mechanics Changing Pattern、Crustal stress Changing Pattern、The occurrence of crack and tomography and the regularity of distribution、The trail change of well、Well cementation situation、Production string hoop position、Completion parameter (segmentation situation、Perforating site etc.) etc..

Engineering parameter can include the wellbore trajectory of target Oil/gas Well, cementing quality information, perforating site information, fracturing parameter and set damage positional information, wherein, wellbore trajectory can be determined by the trend of target Oil/gas Well, cementing quality information can be passed through with reference to drilling data, well cementation data, Using Conventional Logs, consider measurement spacing, production string specification, cement slurry density, cement thickness, instrument is eccentric, rapid stratum, microgap, outer layer production string, the factors such as formation lithology and oozing property of hole, determine degree of consolidation and the cement sheath Inter-zonal packing ability at two interfaces, fracturing parameter can include fracturing fluid apparent viscosity, flow stance index and consistency coefficient, fracturing fluid spurt loss, overall fluid loss coefficient, the vertical characteristics etc. of fracturing fluid spurt loss and overall fluid loss coefficient and the pure leak-off height of fracturing fluid.

Step 102, according to geologic parameter and engineering parameter, it is determined that the information in the risk region occurred frequently of the production string of target Oil/gas Well.

In force, relative analysis needs the geology in region and the engineering specifications that carry out transforming, and qualitative analysis is it is important that evaluate along whether target oil gas pit shaft axially layer exists significant discontinuity surface.Discontinuity surface is the high risk zone that production string occurs to lose efficacy, stratum discontinuity surface mainly has following features: there is lithologic interface, big along wellbore formation rock mechanics attribute difference, crustal stress change is acutely, crack and mature fault, simultaneously need to analyze the corresponding relation of cementing quality, the track of well, production string hoop, segmentation and perforating site and these geologic provinces.

Alternatively, can by above-mentioned all parameters and the corresponding properties analyzing the stratum obtained, it is plotted on a comprehensive analysis plate with the different degree of depth, corresponding processing procedure can include herein below: according to geologic parameter and engineering parameter, the production string failure comprehensive setting up target Oil/gas Well analyzes plate, based on comprehensively analyzing plate, it is determined that the information in the risk region occurred frequently of the production string of target Oil/gas Well.

nullIn force，The drilling well of target Oil/gas Well can be collected、Well logging and completion parameter，Set up production string failure comprehensive and analyze plate，Comprehensive plate of analyzing contains bridging plug and perforating site、Production string failure site、This region well log interpretation achievement and wellbore trajectory，Contrast these information be commonly available occur production string lost efficacy position rock density low，Intensity is substantially less than closes on upper and lower rock stratum，The borehole wall exists expanding，Nuclear magnetic resonance, NMR shows that set damages region apertures porosity and differs greatly with contiguous，From this section of gamma value of gamma for closing on highest portion position，Image logging interpretation result，There is lithologic interface and fracture development in this place，May determine that set damages region and is in lithologic interface region，This region is close on the weakness zone in stratum，After simultaneously observing pressure break, fracture extension is to this weakness zone，The rock stratum higher by intensity stops，Do not directly affect set and damage the rock stratum in region.

Comprehensive analysis can obtain, and production string inefficacy happening part is in lithology interface, and this position is in the weakest well section of rock mechanics.

Step 103, the information in the risk region occurred frequently of the production string according to geologic parameter, engineering parameter and target Oil/gas Well, obtain stratum crustal stress in fracturing process belonging to production string risk region occurred frequently dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of production string deformation.

In force, geologic parameter obtained above and engineering parameter can be passed through, the region at the production string place of target Oil/gas Well is analyzed, and the crustal stress on stratum corresponding to calculation risk area information, the stress (including the stress of the cement self of production string outer layer and the stress etc. of production string self) of the crustal stress obtained Yu target Oil/gas Well self can be contrasted, if crustal stress is more than the stress of target Oil/gas Well self, then may determine that production string deforms upon, now, the deformation angle that production string deforms upon can be calculated, if crustal stress is less than the stress of target Oil/gas Well self, then production string will not deformation.

Alternatively, the processing mode of above-mentioned steps 103 can be varied, the optional processing mode of one presented below, specifically can include herein below: set up the reservoir reconstruction section three-dimensional finite element model at target Oil/gas Well place, based on the model set up, described geologic parameter and engineering parameter, the risk region occurred frequently of the production string of target Oil/gas Well is analyzed, obtain the crustal stress on stratum belonging to the risk region occurred frequently of production string dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, determine the occurrence that production string deforms.

Wherein, the size of three-dimensional finite element model is more than the size in the region that there is microseism signal, and three-dimensional finite element model is configured by the non-average in stratum；Geologic parameter according to zones of different, the corresponding region in three-dimensional finite element model arranges different original material attributes and initial in-site stress field；Three-dimensional finite element model is arranged based on porous media model, and by fluid structurecoupling, carries out transient simulation；The result of calculation of transient simulation and micro-seismic monitoring data are combined closely, and by changing earth formation material attribute and in-place permeability, the region that matching formation breakdown is broken；Using perforation position as constant-pressure boundary, using bottom-hole treating pressure as pressure break size.

In force, the finite element analysis model of non-average can be set up according to the geologic feature of Reservoir Section, wherein, this model needs to consider crustal stress balance and fluid structurecoupling, variation of lithological according to stratum, model partition is a lot of different attribute substratums by rock mechanics and crustal stress Changing Pattern, different substratums give different material properties, initial pore pressure and crustal stress load, the large area volume seam individually volume fracturing not formed is described, the mode adopting matching permeability describes this region, in conjunction with the direction that microseism data point reuse simulated domain and liquid flow, superposition microseism data step by step are adopted to be fitted simulation for horizontal well multistage fracturing；Set perforation bunch position as constant-pressure boundary, as the starting point of fracturing reform, the total time of matching fracturing reform, the transmission in the earth formation of transient simulation pressure.

Such as, setting up the reservoir reconstruction section three-dimensional finite element model of certain Oil/gas Well, model is high 90 meters, if being production string failed areas on 10 meters of top, is the substratum with different rock mechanics and crustal stress condition by model partition.The region that fracturing reform directly involves has carried out matching in conjunction with micro-seismic monitoring data, can using three perforation bunch positions as constant-pressure boundary, the region taking production string inefficacy carries out individually analysis (from top to bottom 10 meters of scopes), observe there is stress abnormality position significantly at 4-5 rice, top, there is lithologic interface in this region correspondence qualitative analysis, fracture development, and the position that rock strength is low, this region finally there occurs that production string deforms.Above-mentioned simulation shows continuing along with pressure break, and pore pressure is gradually increased, and each layer effective stress difference in this region is being gradually increased, and especially damages region at corresponding set, and 4-5 rice, path stress difference is more and more violent along with pressure break change.Finally there is slip failure by shear production string at lithologic interface place in this stratum, place.

On the basis that generally stress field is analyzed, intercept production string failed areas and set up the FEM (finite element) model comprising production string, it is loaded directly into by simulating the stress field and pore pressure data obtained, analyze the mechanics situation of production string under this stress condition, can be calculated, production string there occurs relatively larger deformation near 2440m and 2500m place, and normal inner diameter is 118.62mm production string, maximum inner diameter 124mm, minimum diameter 109mm after deforming near 2440m.In actual pressing crack construction process, enter Φ 112mm drift size gauge tool under after the complete 2495～2516m well section of pressure break and meet card to well depth 2441.63m, illustrate near 2441m, occur that production string lost efficacy, very identical with result of calculation.Main cause is to occur lithology interface near 2441m, and crustal stress, to production string extrusion shearing, causes production string cross section for ellipse.

It should be noted that the processing procedure of above-mentioned steps 103 can be carry out after stratum is carried out volume fracturing, as such, it is possible to obtain affecting the different affecting factors that production string lost efficacy, it is simple to the follow-up accuracy that other production string is carried out failure analysis.

Alternatively, the position that the production string of target Oil/gas Well lost efficacy can be carried out early warning, corresponding processing procedure can include herein below: if it is determined that production string displacement in the earth formation more than or equal to default displacement, then send the cue that the production string of target Oil/gas Well lost efficacy.

In force, the occurrence of above-mentioned production string deformation includes production string displacement in the earth formation, one can be arranged in advance in the terminal when not affecting oil or gas production, production string is allowed for maximum displacement, the displacement in the earth formation of the production string of each risk zones can be calculated by the way, then, the production string obtained displacement in the earth formation can be contrasted with the displacement preset, if certain displacement is more than or equal to default displacement, then terminal can send the cue that the production string of target Oil/gas Well lost efficacy, wherein, cue can have many forms, such as, cue may refer to show that lamp glimmers, it can also be prompt tone etc..

In order to better illustrate above-mentioned implementation process, said process is described in detail by same concrete example below:

Collecting the drilling well of target Oil/gas Well, well logging and completion parameter, set up production string failure comprehensive and analyze plate, comprehensive analysis in plate comprises bridging plug and perforating site, production string failure site, this region well log interpretation achievement and wellbore trajectory.Contrast these information it is observed that damage region at set there is rock strength and crustal stress alternate, shearing slip easily occurs.

Comprehensively think, production string inefficacy happening part is in lithology interface, and this position is in the weakest well section of rock mechanics, meanwhile, this well is shale gas horizontal well, and transformation scale is big, at fracturing process step by step, there is the transformation repeatedly to stratum weakness zone, cause stratum, at weakness zone, unexpected sliding occurs, stress sharply discharges the integrity having influence on production string.

The finite element analysis model of 3-6 level pressure break (2035m-2678m) the process stress field redistribution of long 643m, wide 476m, thick 200m is established based on the geologic information of this well, hole trajectory data, well-completing process, large-scale staged fracturing operating mode.This model feature be in that by Fracturing Monitorings at different levels to microseism data area carry out individually dividing out, in the process of calculating according to pressure break operating mode, step by step apply different boundary condition, rock-soil material mechanical attribute, change (the dispersivity rock fracture that permeability matching pressure break produces) by ground permeability and simulate the of the fracturing fluid extension in these regions, analyze the change of fracturing process entirely stress field and the deformation displacement situation on stratum.

Calculating shows, after pressure break, microseism hotspots is the redistribution of Original strata stress field under fracturing fluid pressure (pore pressure) acts on, whole model area crustal stress numerical value and direction change greatly, the flatly stress of both direction substantially increases at microseism near zone, minimum level crustal stress reaches 73MPa, and maximum horizontal crustal stress reaches 105MPa.In microseism region owing to pressing crack construction pressure break is very big, counteract crustal stress effect and tension occurs so that production string deforms.

Stress field redistribution causes that formation rock and production string are subjected to displacement motion, and regional area maximum displacement is more than 240mm.Stress field and displacement are applied on production string body as load, it appeared that production string is in fracturing work process, occurring that obvious displacement distorts near 2335m, bending curvature is big, production string is obvious S type, it is possible to cause that rigidity working string is difficult to pass through.In practice of construction process, being hampered when pumping the 3rd bridging plug (Φ 114mm) to 2331.5m, field condition is consistent with analog result.

nullIn the embodiment of the present invention，Obtain geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position，Wherein，Geologic parameter includes pendage angle、Formation lithology section、The rock mechanics parameters section on stratum、Fault information in the Original strata stress section on stratum and the preset range of target Oil/gas Well present position，Engineering parameter includes the wellbore trajectory of target Oil/gas Well、Cementing quality information、Perforating site information、Fracturing parameter、Set damages positional information，According to geologic parameter and engineering parameter，Determine the information in the risk region occurred frequently of the production string of target Oil/gas Well，According to geologic parameter、The information in the risk region occurred frequently of the production string of engineering parameter and target Oil/gas Well，Obtain the crustal stress on stratum belonging to production string risk region occurred frequently dynamically to change and rock deformation situation，Dynamically change and rock deformation situation based on the crustal stress got，Determine the occurrence that production string deforms，So，Can not only use geologic parameter，But also consider the impact that production string inefficacy is produced by engineering parameter，And then，Mode by qualitative analysis and quantitative analysis，When volume fracturing，Whether production string can be lost efficacy and be analyzed，Thus，Can improve the accuracy adopting the inefficacy of large-scale segmentation volume fracturing condition setting of casing production string to be analyzed.

Embodiment three

Based on identical technology design, the embodiment of the present invention additionally provides a kind of device analyzing production string inefficacy, as in figure 2 it is shown, this device includes:

Acquisition module 210, for obtaining geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position, wherein, geologic parameter includes the fault information in pendage angle, formation lithology section, the rock mechanics parameters section on stratum, the Original strata stress section on stratum and the preset range of target Oil/gas Well present position, and engineering parameter includes the wellbore trajectory of target Oil/gas Well, cementing quality information, perforating site information, fracturing parameter, set damage positional information；

First determines module 220, for according to geologic parameter and engineering parameter, it is determined that the information in the risk region occurred frequently of the production string of target Oil/gas Well；

Second determines module 230, information for the risk region occurred frequently of the production string according to geologic parameter, engineering parameter and target Oil/gas Well, obtain stratum crustal stress in fracturing process belonging to production string risk region occurred frequently dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of production string deformation.

Alternatively, first determines module 220, is used for:

According to geologic parameter and engineering parameter, the production string failure comprehensive setting up target Oil/gas Well analyzes plate, based on comprehensively analyzing plate, it is determined that the information in the risk region occurred frequently of the production string of target Oil/gas Well；Wherein, comprehensive plate of analyzing includes at least: wellbore trajectory, completion fracturing parameter, lithologic interpretation section, profile of geostress, rock mechanics section and set damage region.

Alternatively, second determines module 230, is used for:

Set up the reservoir reconstruction section three-dimensional finite element model at target Oil/gas Well place, based on the model set up, geologic parameter and engineering parameter, the risk region occurred frequently of the production string of target Oil/gas Well is analyzed, obtain production string risk region occurred frequently belonging to stratum in fracturing process crustal stress dynamically change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of production string deformation.

Alternatively, the size of three-dimensional finite element model is more than the size in the region that there is microseism signal, and three-dimensional finite element model is configured by the non-average in stratum；Geologic parameter according to zones of different, the corresponding region in three-dimensional finite element model arranges different original material attributes and initial in-site stress field；Three-dimensional finite element model is arranged based on porous media model, and by fluid structurecoupling, carries out transient simulation；The result of calculation of transient simulation and micro-seismic monitoring data are combined closely, and by changing earth formation material attribute and in-place permeability, the region that matching formation breakdown is broken；Using perforation position as constant-pressure boundary, using bottom-hole treating pressure as pressure break size.

Alternatively, the occurrence of production string deformation includes production string displacement in the earth formation；

This device also includes sending module, is used for:

If it is determined that production string displacement in the earth formation more than or equal to default displacement, then send the cue that the production string of target Oil/gas Well lost efficacy.

nullIn the embodiment of the present invention，Obtain geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position，Wherein，Geologic parameter includes pendage angle、Formation lithology section、The rock mechanics parameters section on stratum、Fault information in the Original strata stress section on stratum and the preset range of target Oil/gas Well present position，Engineering parameter includes the wellbore trajectory of target Oil/gas Well、Cementing quality information、Perforating site information、Fracturing parameter、Set damages positional information，According to geologic parameter and engineering parameter，Determine the information in the risk region occurred frequently of the production string of target Oil/gas Well，According to geologic parameter、The information in the risk region occurred frequently of the production string of engineering parameter and target Oil/gas Well，Obtain the crustal stress on stratum belonging to production string risk region occurred frequently dynamically to change and rock deformation situation，Dynamically change and rock deformation situation based on the crustal stress got，Determine the occurrence that production string deforms，So，Can not only use geologic parameter，But also consider the impact that production string inefficacy is produced by engineering parameter，And then，Mode by qualitative analysis and quantitative analysis，When volume fracturing，Whether production string can be lost efficacy and be analyzed，Thus，Can improve the accuracy adopting the inefficacy of large-scale segmentation volume fracturing condition setting of casing production string to be analyzed.

It should be understood that the device analyzing production string inefficacy that above-described embodiment provides is when analyzing production string and losing efficacy, only it is illustrated with the division of above-mentioned each functional module, in practical application, as desired above-mentioned functions distribution can be completed by different functional modules, it is divided into different functional modules, to complete all or part of function described above by the internal structure of terminal.It addition, analyze the production string device lost efficacy and the embodiment of the method analyzing production string inefficacy of above-described embodiment offer belong to same design, it implements process and refers to embodiment of the method, repeats no more here.

Embodiment four

Refer to Fig. 3, it illustrates the structural representation of terminal involved by the embodiment of the present invention, what this terminal may be used for implementing providing in above-described embodiment analyzes the method that production string lost efficacy.Specifically:

Terminal 1000 can include communication unit 110, includes the memorizer 120 of one or more computer-readable recording mediums, input block 130, display unit 140, sensor 150, voicefrequency circuit 160, WIFI (WirelessFidelity, Wireless Fidelity) module 170, include the parts such as processor 180 and power supply 190 of or more than one process core.It will be understood by those skilled in the art that the terminal structure shown in figure is not intended that the restriction to terminal, it is possible to include ratio and illustrate more or less of parts, or combine some parts, or different parts are arranged.Wherein:

Communication unit 110 can be used for receiving and sending messages or in communication process, the reception of signal and transmission, this communication unit 110 can be RF (RadioFrequency, radio frequency) circuit, router, modem, etc. network communication equipment.Especially, when communication unit 110 is RF circuit, after the downlink information of base station is received, transfer to one or more than one processor 180 processes；It addition, be sent to base station by relating to up data.Generally, RF circuit as communication unit includes but not limited to antenna, at least one amplifier, tuner, one or more agitator, subscriber identity module (SIM) card, transceiver, bonder, LNA (LowNoiseAmplifier, low-noise amplifier), duplexer etc..Communicate additionally, communication unit 110 can also pass through radio communication with network and other equipment.nullDescribed radio communication can use arbitrary communication standard or agreement，Include but not limited to GSM (GlobalSystemofMobilecommunication，Global system for mobile communications)、GPRS(GeneralPacketRadioService，General packet radio service)、CDMA(CodeDivisionMultipleAccess，CDMA)、WCDMA(WidebandCodeDivisionMultipleAccess，WCDMA)、LTE(LongTermEvolution，Long Term Evolution)、Email、SMS(ShortMessagingService，Short Message Service) etc..Memorizer 120 can be used for storing software program and module, and processor 180 is stored in software program and the module of memorizer 120 by running, thus performing the application of various function and data process.Memorizer 120 can mainly include storage program area and storage data field, and wherein, storage program area can store the application program (such as sound-playing function, image player function etc.) etc. needed for operating system, at least one function；Storage data field can store the data (such as voice data, phone directory etc.) etc. that the use according to terminal 1000 creates.Additionally, memorizer 120 can include high-speed random access memory, it is also possible to include nonvolatile memory, for instance at least one disk memory, flush memory device or other volatile solid-state parts.Correspondingly, memorizer 120 can also include Memory Controller, to provide processor 180 and the input block 130 access to memorizer 120.

Input block 130 can be used for receiving numeral or the character information of input, and produce the keyboard relevant with user setup and function control, mouse, action bars, optics or trace ball signal and input.Preferably, input block 130 can include Touch sensitive surface 131 and other input equipments 132.Touch sensitive surface 131, also referred to as touching display screen or Trackpad, user can be collected thereon or neighbouring touch operation (such as user uses any applicable object such as finger, stylus or adnexa operation on Touch sensitive surface 131 or near Touch sensitive surface 131), and drive corresponding connecting device according to formula set in advance.Optionally, Touch sensitive surface 131 can include touch detecting apparatus and two parts of touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect the signal that touch operation brings, transmit a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into contact coordinate, then gives processor 180, and can receive order that processor 180 sends and be performed.Furthermore, it is possible to adopt the polytypes such as resistance-type, condenser type, infrared ray and surface acoustic wave to realize Touch sensitive surface 131.Except Touch sensitive surface 131, input block 130 can also include other input equipments 132.Preferably, other input equipments 132 can include but not limited to one or more in physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc..

Display unit 140 can be used for showing the various graphical user interface of information or the information being supplied to user and the terminal 1000 inputted by user, and these graphical user interface can be made up of figure, text, icon, video and its combination in any.Display unit 140 can include display floater 141, optionally, the form such as LCD (LiquidCrystalDisplay, liquid crystal display), OLED (OrganicLight-EmittingDiode, Organic Light Emitting Diode) can be adopted to configure display floater 141.Further, Touch sensitive surface 131 can cover display floater 141, when Touch sensitive surface 131 detects thereon or after neighbouring touch operation, send processor 180 to determine the type of touch event, on display floater 141, provide corresponding visual output with preprocessor 180 according to the type of touch event.Although in the example shown, Touch sensitive surface 131 and display floater 141 are to realize input and input function as two independent parts, but in some embodiments it is possible to by integrated to Touch sensitive surface 131 and display floater 141 and realize input and output function.

Terminal 1000 may also include at least one sensor 150, such as optical sensor, motion sensor and other sensors.Optical sensor can include ambient light sensor and proximity transducer, and wherein, ambient light sensor can regulate the brightness of display floater 141 according to the light and shade of ambient light, and proximity transducer when terminal 1000 moves in one's ear, can cut out display floater 141 and/or backlight.One as motion sensor, Gravity accelerometer can detect the size of the acceleration that (is generally three axles) in all directions, can detect that the size of gravity and direction time static, can be used for identifying the application (such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating) of mobile phone attitude, Vibration identification correlation function (such as pedometer, knock) etc.；Other sensors such as the gyroscope that can also configure as terminal 1000, barometer, drimeter, thermometer, infrared ray sensor, do not repeat them here.

Voicefrequency circuit 160, speaker 161, microphone 162 can provide the audio interface between user and terminal 1000.Voicefrequency circuit 160 can by receive voice data conversion after the signal of telecommunication, be transferred to speaker 161, by speaker 161 be converted to acoustical signal output；On the other hand, the acoustical signal of collection is converted to the signal of telecommunication by microphone 162, voice data is converted to after being received by voicefrequency circuit 160, after again voice data output processor 180 being processed, through RF circuit 110 to be sent to such as another terminal, or voice data is exported to memorizer 120 to process further.Voicefrequency circuit 160 is also possible that earphone jack, to provide the communication of peripheral hardware earphone and terminal 1000.

In order to realize radio communication, this terminal can being configured with wireless communication unit 170, this wireless communication unit 170 can be WIFI module.WIFI belongs to short range wireless transmission technology, and terminal 1000 can help user to send and receive e-mail by wireless communication unit 170, browse webpage and access streaming video etc., and it has provided the user wireless broadband internet and has accessed.Although there is shown wireless communication unit 170, but it is understood that, it is also not belonging to must be configured into of terminal 1000, can omit in disclosed essential scope as needed in not changing completely.

Processor 180 is the control centre of terminal 1000, utilize various interface and the various piece of the whole mobile phone of connection, it is stored in the software program in memorizer 120 and/or module by running or performing, and call the data being stored in memorizer 120, perform the various functions of terminal 1000 and process data, thus mobile phone is carried out integral monitoring.Optionally, processor 180 can include one or more process core；Preferably, processor 180 can integrated application processor and modem processor, wherein, application processor mainly processes operating system, user interface and application program etc., and modem processor mainly processes radio communication.It is understood that above-mentioned modem processor can not also be integrated in processor 180.

Terminal 1000 also includes the power supply 190 (such as battery) powered to all parts, preferably, it is logically contiguous with processor 180 that power supply can pass through power-supply management system, realizes the functions such as management charging, electric discharge and power managed thereby through power-supply management system.Power supply 190 can also include one or more direct current or alternating current power supply, recharging system, power failure detection circuit, power supply changeover device or the random component such as inverter, power supply status indicator.

Although not shown, terminal 1000 can also include photographic head, bluetooth module etc., does not repeat them here.In the present embodiment, terminal also includes memorizer, and one or more than one program, one of them or more than one program are stored in memorizer, and are configured to be performed one or the instruction containing the method for carrying out disclosure embodiment offer of the more than one program package by one or more than one processor:

Obtain geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position, wherein, geologic parameter includes the fault information in pendage angle, formation lithology section, the rock mechanics parameters section on stratum, the Original strata stress section on stratum and the preset range of target Oil/gas Well present position, and engineering parameter includes the wellbore trajectory of target Oil/gas Well, cementing quality information, perforating site information, fracturing parameter, set damage positional information；

According to geologic parameter and engineering parameter, it is determined that the information in the risk region occurred frequently of the production string of target Oil/gas Well；

The information in the risk region occurred frequently of the production string according to geologic parameter, engineering parameter and target Oil/gas Well, obtain stratum crustal stress in fracturing process belonging to production string risk region occurred frequently dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of production string deformation.

Alternatively, according to geologic parameter and engineering parameter, it is determined that the information in the risk region occurred frequently of the production string of target Oil/gas Well, including:

According to geologic parameter and engineering parameter, the production string failure comprehensive setting up target Oil/gas Well analyzes plate, based on comprehensively analyzing plate, it is determined that the information in the risk region occurred frequently of the production string of target Oil/gas Well；Wherein, comprehensive plate of analyzing includes at least: wellbore trajectory, completion fracturing parameter, lithologic interpretation section, profile of geostress, rock mechanics section and set damage region.

Alternatively, the information in the risk region occurred frequently of the production string according to geologic parameter, engineering parameter and target Oil/gas Well, obtain stratum crustal stress in fracturing process belonging to the risk region occurred frequently of production string dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, determine the occurrence that production string deforms, including:

Set up the reservoir reconstruction section three-dimensional finite element model at target Oil/gas Well place, based on the model set up, geologic parameter and engineering parameter, the risk region occurred frequently of the production string of target Oil/gas Well is analyzed, obtain stratum crustal stress in fracturing process belonging to the risk region occurred frequently of production string dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of production string deformation.

Alternatively, the size of three-dimensional finite element model is more than the size in the region that there is microseism signal, and three-dimensional finite element model is configured by the non-average in stratum；Geologic parameter according to zones of different, the corresponding region in three-dimensional finite element model arranges different original material attributes and initial in-site stress field；Three-dimensional finite element model is arranged based on porous media model, and by fluid structurecoupling, carries out transient simulation；The result of calculation of transient simulation and micro-seismic monitoring data are combined closely, and by changing earth formation material attribute and in-place permeability, the region that matching formation breakdown is broken；Using perforation position as constant-pressure boundary, using bottom-hole treating pressure as pressure break size.

Alternatively, the occurrence of production string deformation includes production string displacement in the earth formation；

The method also includes:

If it is determined that production string displacement in the earth formation more than or equal to default displacement, then send the cue that the production string of target Oil/gas Well lost efficacy.

nullIn the embodiment of the present invention，Obtain geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position，Wherein，Geologic parameter includes pendage angle、Formation lithology section、The rock mechanics parameters section on stratum、Fault information in the Original strata stress section on stratum and the preset range of target Oil/gas Well present position，Engineering parameter includes the wellbore trajectory of target Oil/gas Well、Cementing quality information、Perforating site information、Fracturing parameter、Set damages positional information，According to geologic parameter and engineering parameter，Determine the information in the risk region occurred frequently of the production string of target Oil/gas Well，According to geologic parameter、The information in the risk region occurred frequently of the production string of engineering parameter and target Oil/gas Well，Obtain the crustal stress on stratum belonging to production string risk region occurred frequently dynamically to change and rock deformation situation，Dynamically change and rock deformation situation based on the crustal stress got，Determine the occurrence that production string deforms，So，Can not only use geologic parameter，But also consider the impact that production string inefficacy is produced by engineering parameter，And then，Mode by qualitative analysis and quantitative analysis，When volume fracturing，Whether production string can be lost efficacy and be analyzed，Thus，The accuracy that when can improve employing large-scale segmentation volume fracturing, production string inefficacy is analyzed.

One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can be completed by hardware, can also be completed by the hardware that program carrys out instruction relevant, described program can be stored in a kind of computer-readable recording medium, storage medium mentioned above can be read only memory, disk or CD etc..

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.

Claims (10)

1. analyze the method that production string lost efficacy for one kind, it is characterised in that described method includes:

Obtain geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position, wherein, described geologic parameter includes the fault information in pendage angle, the rock mechanics parameters section on stratum, the Original strata stress section on stratum and the preset range of described target Oil/gas Well present position, and described engineering parameter includes the wellbore trajectory of described target Oil/gas Well, cementing quality information, perforating site information, fracturing parameter, set damage positional information；

According to described geologic parameter and engineering parameter, it is determined that the information in the risk region occurred frequently of the production string of described target Oil/gas Well；

The information in the risk region occurred frequently of the production string according to described geologic parameter, engineering parameter and described target Oil/gas Well, obtain stratum crustal stress in fracturing process belonging to production string risk region occurred frequently dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of described production string deformation.

2. method according to claim 1, it is characterised in that described according to described geologic parameter and engineering parameter, it is determined that the information in the risk region occurred frequently of the production string of described target Oil/gas Well, including:

According to described geologic parameter and engineering parameter, the production string failure comprehensive setting up described target Oil/gas Well analyzes plate, based on described comprehensive analysis plate, it is determined that the information in the risk region occurred frequently of the production string of described target Oil/gas Well；Wherein, described comprehensive analysis plate includes at least: wellbore trajectory, completion fracturing parameter, lithologic interpretation section, profile of geostress, rock mechanics section and set damage region.

3. method according to claim 1, it is characterized in that, the information in the risk region occurred frequently of the described production string according to described geologic parameter, engineering parameter and described target Oil/gas Well, obtain stratum crustal stress in fracturing process belonging to the risk region occurred frequently of described production string dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, determine the occurrence that described production string deforms, including:

Set up the reservoir reconstruction section three-dimensional finite element model at described target Oil/gas Well place, based on the model set up, described geologic parameter and engineering parameter, the risk region occurred frequently of the production string of described target Oil/gas Well is analyzed, obtain stratum crustal stress in fracturing process belonging to the risk region occurred frequently of described production string dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of described production string deformation.

4. method according to claim 3, it is characterised in that the size of described three-dimensional finite element model is more than the size in the region that there is microseism signal, and described three-dimensional finite element model is configured by the non-average in stratum；Geologic parameter according to zones of different, the corresponding region in described three-dimensional finite element model arranges different original material attributes and initial in-site stress field；Described three-dimensional finite element model is arranged based on porous media model, and by fluid structurecoupling, carries out transient simulation；The result of calculation of transient simulation and micro-seismic monitoring data are combined closely, and by changing earth formation material attribute and in-place permeability, the region that matching formation breakdown is broken；Using perforation position as constant-pressure boundary, using bottom-hole treating pressure as pressure break size.

5. method according to claim 1, it is characterised in that the occurrence of described production string deformation includes the displacement in the earth formation of described production string；

Described method also includes:

If it is determined that production string displacement in the earth formation more than or equal to default displacement, then send the cue that the production string of described target Oil/gas Well lost efficacy.

6. analyze the device that production string lost efficacy for one kind, it is characterised in that described device includes:

Acquisition module, for obtaining geologic parameter and the engineering parameter on different depth stratum in the preset range of target Oil/gas Well present position, wherein, described geologic parameter includes the fault information in pendage angle, formation lithology section, the rock mechanics parameters section on stratum, the Original strata stress section on stratum and the preset range of described target Oil/gas Well present position, and described engineering parameter includes the wellbore trajectory of described target Oil/gas Well, cementing quality information, perforating site information, fracturing parameter, set damage positional information；

First determines module, for according to described geologic parameter and engineering parameter, it is determined that the information in the risk region occurred frequently of the production string of described target Oil/gas Well；

Second determines module, information for the risk region occurred frequently of the production string according to described geologic parameter, engineering parameter and described target Oil/gas Well, obtain stratum crustal stress in fracturing process belonging to production string risk region occurred frequently dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of described production string deformation.

7. device according to claim 6, it is characterised in that described first determines module, is used for:

According to described geologic parameter and engineering parameter, the production string failure comprehensive setting up described target Oil/gas Well analyzes plate, based on described comprehensive analysis plate, it is determined that the information in the risk region occurred frequently of the production string of described target Oil/gas Well；Wherein, described comprehensive analysis plate includes at least: wellbore trajectory, completion fracturing parameter, lithologic interpretation section, profile of geostress, rock mechanics section and set damage region.

8. device according to claim 6, it is characterised in that described second determines module, is used for:

Set up the reservoir reconstruction section three-dimensional finite element model at described target Oil/gas Well place, based on the model set up, described geologic parameter and engineering parameter, the risk region occurred frequently of the production string of described target Oil/gas Well is analyzed, obtain stratum crustal stress in fracturing process belonging to the risk region occurred frequently of described production string dynamically to change and rock deformation situation, dynamically change and rock deformation situation based on the crustal stress got, it is determined that the occurrence of described production string deformation.

9. device according to claim 8, it is characterised in that the size of described three-dimensional finite element model is more than the size in the region that there is microseism signal, and described three-dimensional finite element model is configured by the non-average in stratum；Geologic parameter according to zones of different, the corresponding region in described three-dimensional finite element model arranges different original material attributes and initial in-site stress field；Described three-dimensional finite element model is arranged based on porous media model, and by fluid structurecoupling, carries out transient simulation；The result of calculation of transient simulation and micro-seismic monitoring data are combined closely, and by changing earth formation material attribute and in-place permeability, the region that matching formation breakdown is broken；Using perforation position as constant-pressure boundary, using bottom-hole treating pressure as pressure break size.

10. device according to claim 6, it is characterised in that the occurrence of described production string deformation includes the displacement in the earth formation of described production string；

Described device also includes sending module, is used for:

If it is determined that production string displacement in the earth formation more than or equal to default displacement, then send the cue that the production string of described target Oil/gas Well lost efficacy.