CN105781504A - Pressure testing method for segmented oil pool and segmented trial-squeezing tubing string - Google Patents
Pressure testing method for segmented oil pool and segmented trial-squeezing tubing string Download PDFInfo
- Publication number
- CN105781504A CN105781504A CN201610127009.8A CN201610127009A CN105781504A CN 105781504 A CN105781504 A CN 105781504A CN 201610127009 A CN201610127009 A CN 201610127009A CN 105781504 A CN105781504 A CN 105781504A
- Authority
- CN
- China
- Prior art keywords
- segmentation
- pressure
- tubing string
- examination
- discharge capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012360 testing method Methods 0.000 title abstract description 28
- 239000012530 fluid Substances 0.000 claims abstract description 34
- 239000004576 sand Substances 0.000 claims abstract description 5
- 230000011218 segmentation Effects 0.000 claims description 66
- 238000010998 test method Methods 0.000 claims description 16
- 238000009530 blood pressure measurement Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 10
- 210000002445 nipple Anatomy 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 230000002706 hydrostatic effect Effects 0.000 claims description 5
- 230000000704 physical effect Effects 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 abstract description 16
- 238000010276 construction Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 5
- 238000004364 calculation method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 206010017076 Fracture Diseases 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000205 computational method Methods 0.000 description 2
- 238000005213 imbibition Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Landscapes
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geophysics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a pressure testing method for a segmented oil pool and a segmented trial-squeezing tubing string. The segmented trial-squeezing tubing string comprises a hydraulic anchor, a Y111 type packer, an oil pipe adjusting short section, a pressure guiding sand blower, a Y211 type packer and a guider which are sequentially connected in series. The hydraulic anchor is connected with an oil pipe through a safety joint. A wellbore and a blocked reservoir stratum nearby cracks are cleaned through blockage removing fluid, the initial transformation situation is judged to serve as a subsequently conducted repeated fracturing design basis, the average time of single-segment trial-squeezing pressure testing is 3 h, the testing period is effectively shortened, and the construction efficiency is improved; the calculation method is simple and rapid, and no special interpretation software is needed; and the problems that direct segmented oil pool pressure testing conducted on a horizontal well is long in consumed time, high in cost and the like, and the segmented oil pool pressure of the horizontal well cannot use the vertical well testing method are solved, so that the testing period is shortened.
Description
Technical field
The present invention relates to petroleum production engineering field, press the segmentation reservoir pressure method of testing in front crack and segmentation examination to squeeze tubing string again particularly to a kind of old well of low-permeability oil deposit horizontal well.
Background technology
Low-permeability oil deposit typically requires employing " horizontal well+staged fracturing " reforming mode and carries out effective exploitation, and initial stage well yield can generally achieve 8～10t.But prolongation over time, or oil reservoir low by initial stage transformation degree cannot be set up effective displacement and affect, and initial stage single well productivity successively decreases 20%～30% half a year, year and a day successively decreases 30%～50%, after 1 year, oil reservoir natural depletion is still up to more than 40%, and production decline is big, and stripper well ratio accounts for more than 30%.
In order to improve low yield horizontal well single well productivity, refracturing becomes one of important means of improvement low yield horizontal well.Meanwhile, acquisition is pressed front crack segmentation reservoir pressure to become low-permeability oil deposit refracturing and is selected one of well selections critical evaluation index.
Existing publication number is CN204457756U " a kind of horizontal well in segments pressure and pressure fall-off test tubing string ", enters multiple packer and split every section under being mainly in pit shaft, and every section adopts the production that intelligent switch device controls every section, then carries out production test to every section.This technology belongs to directly test pit shaft and produces flowing pressure, it is impossible to carry out reservoir pressure test.To obtain reservoir pressure, calculating recovery time according to every section of closing well 15-20 days measuring pressure, average every mouthful of well needs the used time 120-160 days, packer bad stability at high temperature under high pressure for a long time, easily causes pressure measurement data distortion.This technology is only applicable to high liquid measure horizontal well simultaneously, asks for error for low liquid measure horizontal well in segments pressure relatively big, and every section needs to apply special reservoir pressure interpretation software and makes an explanation, and length consuming time, cost is high.Horizontal well is repeated transformation, and the utilization rate of oil wells is low, does not possess representativeness for obtaining horizontal well in segments reservoir pressure means.
To sum up, the existing method obtaining the front reservoir pressure test of pressure there is problems in that one is that straight well is mainly applied in the recovery test of this well direct pressure, can not directly judge the difference of each intersegmental reservoir pressure for the horizontal well of multistage exploitation.Two be offset well pressure buildup test for heterogeneous reservoir, more do not possess the suitability particularly with horizontal well.Three is that the mode that current horizontal well pressure is tested is mainly used for segmentation Liquid output and flowing pressure test, do not simply fail to obtain reservoir pressure, long construction period tool stability is poor, and contributes section cannot screen its reason for low yield and be blocking or the initial stage does not transform because of tool failures.
Summary of the invention
The purpose of the present invention one, in horizontal oil, blockages relieving fluid is injected in direct segmentation, can realize segmentation borehole and nearly pit shaft de-plugging, it is possible to judge each section of initial stage transformation degree, is repeated transformation selections offer foundation for follow-up；Two be adopt segmentation pressure fall-off test indirectly obtain reservoir pressure, short construction period, it is simple to follow-up carry out segmentation repeat transformation parameter optimization.
For this, the invention provides a kind of segmentation examination and squeeze tubing string, adjust pipe nipple, pressure-guiding sand blower, Y211 type packer, guider including the hydraulic anchor being sequentially connected in series, Y111 type packer, oil pipe, hydraulic anchor is connected with oil pipe by safety joint.
Described oil pipe adjusts and is provided with Pressure gauge on pipe nipple.
Being serially connected with centralizer between described hydraulic anchor and oil pipe, centralizer is connected with oil pipe by safety joint.
A kind of segmentation reservoir pressure method of testing, comprises the steps:
Step one, squeezes tubing string by segmentation examination and is connected to oil pipe afterbody, will enter under oil pipe in horizontal well so that segmentation examination is squeezed tubing string and is positioned at first fracturing section of horizontal well toe, it is achieved intersegmental packing；
Step 2, squeezes tubing string by segmentation examination and injects blockages relieving fluid to first fracturing section, with 0～2m3The discharge capacity squeezing 15～30min of/min；
Step 3,1～2min before squeezing terminates, ladder reduces discharge capacity to zero, then termination of pumping pressure measurement 1～2 hour, enrolls bottom pressure landing data with measuring truck or Pressure gauge；
Step 4, lifts up segmentation examination and squeezes tubing string to next section, and repeat step 2, step 3, completes the examination of second segment blockages relieving fluid and squeezes；
Step 5, repeats step 2, step 3, step 4, squeezes until completing the examination of all of segmentation blockages relieving fluid；
Step 6, utilizes segmentation examination to squeeze tubing string bottom pressure data of admission in squeezing work progress, draws discharge capacity and pressure dependence figure, matching quadratic term relational expression, calculate reservoir pressure Pr.
Ladder described in step 3 reduces discharge capacity and refers in 1～2min before squeezing terminates to zero, with the interval of every 10～20s, 0.017～0.67m3The discharge capacity ladder of/min is reduced to zero.
Described blockages relieving fluid selects acid blockages relieving fluid.
Calculating reservoir pressure Pr described in step 6 is undertaken by equation below:
Pc≈σh=ν/(1-ν)·(σh-α·Pr)+α·Pr
Wherein, ν is Poisson's ratio；α is Biot spy's coefficient；σ h is vertical stress, MPa；
Pc=Ph+c
Wherein, PhFor liquid column hydrostatic pressure, MPa；C is the constant depending on rock and physical property of fluid.
Squeezing tubing string by segmentation examination and inject blockages relieving fluid to first fracturing section described in step 2, is with 1.5m3The discharge capacity squeezing 20min of/min.
The 1.5min before squeezing terminates described in step 3, ladder reduces discharge capacity to zero, then termination of pumping pressure measurement 1.5 hours, enrolls bottom pressure landing data with measuring truck.
Described ladder reduces discharge capacity and refers in the 1.5min before squeezing terminates to zero, with the interval of every 25s, 0.25m3The discharge capacity ladder of/min is reduced to zero.
Beneficial effects of the present invention: this old well of low-permeability oil deposit horizontal well provided by the invention carries out the front crack segmentation reservoir pressure method of testing of multiple pressure and tubing string is squeezed in segmentation examination, blocking reservoir near pit shaft and crack is cleaned by blockages relieving fluid, judgement initial stage transformation situation, refracturing design considerations is carried out for follow-up, the average used time 3h of pressure measurement is squeezed in single hop examination, effectively reduce test period, improve efficiency of construction, computational methods simple and fast, without special interpretation software, solve horizontal well and carry out direct segmentation reservoir pressure test length consuming time, high in cost of production feature, solve horizontal well in segments reservoir pressure and can not use straight well method of testing, shorten test period.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is the structural representation that tubing string is squeezed in segmentation examination.
Description of reference numerals: 1, safety joint；2, centralizer；3, hydraulic anchor；4, Y111 packer；5, oil pipe adjusts pipe nipple；6, pressure-guiding sand blower；7, Y211 packer；8, guider, 9, oil pipe；10, Pressure gauge.
Detailed description of the invention
Embodiment 1:
As shown in Figure 1, present embodiments provide a kind of segmentation examination and squeeze tubing string, adjusting pipe nipple 5, pressure-guiding sand blower 6, Y211 type packer 7, guider 8 including the hydraulic anchor 3 being sequentially connected in series, Y111 type packer 4, oil pipe, hydraulic anchor 3 is connected with oil pipe 9 by safety joint 1.
What the crowded tubing string of segmentation examination mainly adopted is that testing integrated tubing string is squeezed in the double; two envelope single deck tape-recorder examination of Y211+Y111 type, top putting is put tubing string and is carried out setting and deblocking, the impact of operational discharge capacity can not be subject to, be possible not only to carry out segmentation examination and squeeze, it is also possible to carry out segmentation drop of pressure test.
The work process of tubing string is squeezed in segmentation examination: step one, segmentation examination is squeezed tubing string and is connected to oil pipe 9 afterbody, enter in horizontal well 9 times by oil pipe so that segmentation examination is squeezed tubing string and is positioned at first fracturing section of horizontal well toe, it is achieved intersegmental packing；
Step 2, squeezes tubing string by segmentation examination and injects blockages relieving fluid to first fracturing section, with 0～2m3The discharge capacity squeezing 15～30min of/min；
Step 3,1～2min before squeezing terminates, ladder reduces discharge capacity to zero, then termination of pumping pressure measurement 1～2 hour, enrolls bottom pressure landing data with measuring truck or Pressure gauge 10；
Step 4, lifts up segmentation examination and squeezes tubing string to next section, and repeat step 2, step 3, completes the examination of second segment blockages relieving fluid and squeezes；
Step 5, repeats step 2, step 3, step 4, squeezes until completing the examination of all of segmentation blockages relieving fluid；
Step 6, utilizes segmentation examination to squeeze tubing string bottom pressure data of admission in squeezing work progress, draws discharge capacity and pressure dependence figure, matching quadratic term relational expression, calculate reservoir pressure Pr.
It should be noted that the termination of pumping pressure measurement described in step 3, after referring to fracturing unit truck termination of pumping, measuring truck continues admission geostatic pressure landing situation, reaches to judge the purpose of incipient crack transformation degree according to crack pressure drop speed.
The present invention, mainly before the old well refracturing of low-permeability oil deposit horizontal well, injects a certain amount of acid de-plugging liquid in early stage with a fixed displacement segmentation, differentiates this section of initial stage transformation situation according to squeezing situation.After having squeezed, carry out ladder and drop discharge capacity injection, and closing well 1h carries out drop of pressure test, finally according to pressure discharge capacity material computation reservoir pressure, after obtaining reservoir pressure, can according to each section of pressure maintenance level assess further the contribution to yield rate of each section and optimize each section repeat transformation parameter, improve the specific aim of measure, finally realize effective improvement of stripper well.
Early stage carries out 2 mouthfuls of well scene tests at low-permeability oil deposit, accumulative examination squeezes 13 sections, wherein 2 sections of examinations are determined as the initial stage and do not transform because of instrument problem after squeezing, each section obtains different reservoir pressures, 6-27MPa, 2 days testing times respectively, carry out segmentation for reservoir pressure and the initial stage section of transformation and supplement energy and refracturing optimization design, improve the specific aim of measure, after measure average individual well increase day by day oil 5.5t, for follow-up carry out in flakes low yield horizontal well administer there is great importance.
Embodiment 2:
As it is shown in figure 1, described oil pipe adjusts is provided with Pressure gauge 10 on pipe nipple 5, the termination of pumping pressure measurement in step 3, both can use measuring truck, it is also possible to enroll bottom pressure landing data with Pressure gauge 10；
Being serially connected with centralizer 2 between described hydraulic anchor 3 and oil pipe 9, centralizer 2 is connected with oil pipe 9 by safety joint 1, and centralizer 2 can ensure that well drilling and cementing quality, and in the present embodiment, concrete protection is that the position of the crowded tubing string of whole segmentation examination does not glance off.
Embodiment 3:
A kind of segmentation reservoir pressure method of testing, comprises the steps:
Step one, squeezes tubing string by segmentation examination and is connected to oil pipe 9 afterbody, enter in horizontal well 9 times by oil pipe so that segmentation examination is squeezed tubing string and is positioned at first fracturing section of horizontal well toe, it is achieved intersegmental packing；
Step 2, squeezes tubing string by segmentation examination and injects blockages relieving fluid to first fracturing section, with 0～2m3The discharge capacity squeezing 15～30min of/min；
Step 3,1～2min before squeezing terminates, ladder reduces discharge capacity to zero, then termination of pumping pressure measurement 1～2 hour, enrolls bottom pressure landing data with measuring truck or Pressure gauge 10；
Step 4, lifts up segmentation examination and squeezes tubing string to next section, and repeat step 2, step 3, completes the examination of second segment blockages relieving fluid and squeezes；
Step 5, repeats step 2, step 3, step 4, squeezes until completing the examination of all of segmentation blockages relieving fluid；
Step 6, utilizes segmentation examination to squeeze tubing string bottom pressure data of admission in squeezing work progress, draws discharge capacity and pressure dependence figure, matching quadratic term relational expression, calculate reservoir pressure Pr.
Concrete, the segmentation reservoir pressure method of testing that the present embodiment provides is before being applied to the old well refracturing of low-permeability oil deposit horizontal well, injects a certain amount of acid de-plugging liquid in early stage with a fixed displacement segmentation, differentiates this section of initial stage transformation situation according to squeezing situation.After having squeezed, carry out ladder and drop discharge capacity injection, and closing well 1h carries out drop of pressure test, finally according to pressure discharge capacity material computation reservoir pressure, after obtaining reservoir pressure, can according to each section of pressure maintenance level assess further the contribution to yield rate of each section and optimize each section repeat transformation parameter, improve the specific aim of measure, finally realize effective improvement of stripper well.
It should be noted that " drawing discharge capacity and pressure dependence figure, matching quadratic term relational expression " is the low discharge capacity of Plotting data (the Q < 0.5m according to squeezing construction admission3/ min) well head pressure and discharge capacity indicative curve meet binomial rule under execution conditions, return quadratic term curve equation:
Pt=c+aQ+bQ2①
In formula, a, b, c are the constant depending on rock and physical property of fluid, directly read by returning the curve equation drawn.
Further, the theoretical calculation formula described in step 5 include 2.-4.:
Under low discharge capacity, the fluidised form in Fractures in Low Permeability Reservoir is non linear fluid flow through porous medium feature, and pressure drop meets P.Forchheimei nonlinear equation:
δP=Pt+Ph-Pf-Pc=aQ+bQ2②
Under low discharge capacity, frictional resistance PfIgnoring, 1. simultaneous formula can obtain every section of closure stress with formula 2. above two formulas:
Pc=Ph+c③
Meanwhile, for low-permeability oil deposit, closure stress is substituted into following formula and can obtain reservoir pressure Pr:
Pc≈σh=ν/(1-ν)·(σh-α·Pr)+α·Pr④
In various above: δ P is squeezing pressure reduction, MPa；Q is squeezing discharge capacity, m3/min；PtFor ground oil conduit pressure, MPa；PhFor liquid column hydrostatic pressure, MPa；PfFor frictional resistance, MPa；Pc is fracture closure pressure, MPa；ν is Poisson's ratio；α is Biot spy's coefficient；σhFor vertical stress, MPa；PrFor reservoir pressure, MPa.
Obtain after reservoir pressure, can according to each section of pressure maintenance level assess further the contribution to yield rate of each section and optimize each section repeat transformation parameter, improve the specific aim of measure, finally realize effective improvement of stripper well.
This old well of low-permeability oil deposit horizontal well provided by the invention carries out the front crack segmentation reservoir pressure method of testing of multiple pressure, blocking reservoir near pit shaft and crack is cleaned by blockages relieving fluid, judgement initial stage transformation situation, refracturing design considerations is carried out for follow-up, the average used time 3h of pressure measurement is squeezed in single hop examination, effectively reduce test period, improve efficiency of construction, computational methods simple and fast, without special interpretation software, solve horizontal well and carry out direct segmentation reservoir pressure test length consuming time, high in cost of production feature, solve horizontal well in segments reservoir pressure and can not use straight well method of testing, shorten test period.
Embodiment 4:
On the basis of embodiment 3, the ladder described in step 3 reduces discharge capacity and refers in 1～2min before squeezing terminates to zero, with the interval of every 10～20s, 0.017～0.67m3The discharge capacity ladder of/min is reduced to zero.The purpose injecting blockages relieving fluid to crack is to clean the crack of wellbore hole annexa oculi and judge imbibition ability and the unlatching situation in original old crack, and it is in order to, under the low discharge capacity execution conditions of drafting below, well head pressure and discharge capacity are curve that ladder reduces discharge capacity.
Embodiment 5:
On the basis of embodiment 4, it should be pointed out that described blockages relieving fluid selects acid blockages relieving fluid, select acid blockages relieving fluid to be because its effect with scale removal wax removal, both may determine that primary fracture imbibition ability and unlatching situation, it is also possible to clean near pit shaft eyelet.
Embodiment 6:
On the basis of embodiment 4, the calculating reservoir pressure Pr described in step 5 is undertaken by equation below:
Pc≈σh=ν/(1-ν)·(σh-α·Pr)+α·Pr
Wherein, ν is Poisson's ratio；α is Biot spy's coefficient；σ h is vertical stress, MPa；
Pc=Ph+c
Wherein, PhFor liquid column hydrostatic pressure, MPa；C is the constant depending on rock and physical property of fluid.
" drawing discharge capacity and pressure dependence figure, matching quadratic term relational expression " is the low discharge capacity of Plotting data (the Q < 0.5m according to squeezing construction admission3/ min) well head pressure and discharge capacity indicative curve meet binomial rule under execution conditions, return quadratic term curve equation:
Pt=c+aQ+bQ2①
In formula, a, b, c are the constant depending on rock and physical property of fluid, directly read by returning the curve equation drawn.
Further, 2. described theoretical calculation formula include-4.:
Under low discharge capacity, the fluidised form in Fractures in Low Permeability Reservoir is non linear fluid flow through porous medium feature, and pressure drop meets P.Forchheimei nonlinear equation:
δP=Pt+Ph-Pf-Pc=aQ+bQ2②
Under low discharge capacity, frictional resistance PfIgnoring, 1. simultaneous formula can obtain every section of closure stress with formula 2. above two formulas:
Pc=Ph+c③
Meanwhile, for low-permeability oil deposit, closure stress is substituted into following formula and can obtain reservoir pressure Pr:
Pc≈σh=ν/(1-ν)·(σh-α·Pr)+α·Pr④
In various above: δ P is squeezing pressure reduction, MPa；Q is squeezing discharge capacity, m3/min；PtFor ground oil conduit pressure, MPa；PhFor liquid column hydrostatic pressure, MPa；PfFor frictional resistance, MPa；Pc is fracture closure pressure, MPa；ν is Poisson's ratio；α is Biot spy's coefficient；σhFor vertical stress, MPa；PrFor reservoir pressure, MPa.
Obtain after reservoir pressure, can according to each section of pressure maintenance level assess further the contribution to yield rate of each section and optimize each section repeat transformation parameter, improve the specific aim of measure, finally realize effective improvement of stripper well.
Embodiment 7:
On the basis of embodiment 4, as preferably, squeezing tubing string by segmentation examination and inject blockages relieving fluid to first fracturing section described in step 2, is with 1.5m3The discharge capacity squeezing 20min of/min, the 1.5min before squeezing terminates described in step 3, ladder reduces discharge capacity to zero, then termination of pumping pressure measurement 1.5 hours, bottom pressure landing data are enrolled with measuring truck, described ladder reduces discharge capacity and refers in the 1.5min before squeezing terminates to zero, with the interval of every 25s, 0.25m3The discharge capacity ladder of/min is reduced to zero.In work progress, concrete discharge capacity, squeezing time, squeezing terminate before ladder by discharge capacity, according to practical situation from Row sum-equal matrix, be actually needed with satisfied scene.
Exemplified as above is only illustration to the present invention, is not intended that the restriction to protection scope of the present invention, every belongs within protection scope of the present invention with the same or analogous design of the present invention.Parts that the present embodiment does not describe in detail and structure belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.
Claims (10)
1. tubing string is squeezed in a segmentation examination, it is characterized in that, adjusting pipe nipple (5), pressure-guiding sand blower (6), Y211 type packer (7), guider (8) including the hydraulic anchor (3) being sequentially connected in series, Y111 type packer (4), oil pipe, hydraulic anchor (3) is connected with oil pipe (9) by safety joint (1).
2. tubing string is squeezed in segmentation examination as claimed in claim 1, it is characterised in that described oil pipe adjusts and is provided with Pressure gauge (10) on pipe nipple (5).
3. tubing string is squeezed in segmentation examination as claimed in claim 1, it is characterised in that being serially connected with centralizer (2) between described hydraulic anchor (3) and oil pipe (9), centralizer (2) is connected with oil pipe (9) by safety joint (1).
4. a segmentation reservoir pressure method of testing, it is characterised in that comprise the steps:
Step one, squeezes tubing string by segmentation examination and is connected to oil pipe (9) afterbody, will enter in horizontal well under oil pipe (9) so that segmentation examination is squeezed tubing string and is positioned at first fracturing section of horizontal well toe, it is achieved intersegmental packing；
Step 2, squeezes tubing string by segmentation examination and injects blockages relieving fluid to first fracturing section, with 0～2m3The discharge capacity squeezing 15～30min of/min；
Step 3,1～2min before squeezing terminates, ladder reduces discharge capacity to zero, then termination of pumping pressure measurement 1～2 hour, enrolls bottom pressure landing data with measuring truck or Pressure gauge (10)；
Step 4, lifts up segmentation examination and squeezes tubing string to next section, and repeat step 2, step 3, completes the examination of second segment blockages relieving fluid and squeezes；
Step 5, repeats step 2, step 3, step 4, squeezes until completing the examination of all of segmentation blockages relieving fluid；
Step 6, utilizes segmentation examination to squeeze tubing string bottom pressure data of admission in squeezing work progress, draws discharge capacity and pressure dependence figure, matching quadratic term relational expression, calculate reservoir pressure Pr.
5. a kind of segmentation reservoir pressure method of testing as claimed in claim 4, it is characterised in that the ladder described in step 3 reduces discharge capacity and refers in 1～2min before squeezing terminates to zero, with the interval of every 10～20s, 0.017～0.67m3The discharge capacity ladder of/min is reduced to zero.
6. a kind of segmentation reservoir pressure method of testing as claimed in claim 4, it is characterised in that described blockages relieving fluid selects acid blockages relieving fluid.
7. a kind of segmentation reservoir pressure method of testing as claimed in claim 4, it is characterised in that the calculating reservoir pressure Pr described in step 6 is undertaken by equation below:
Pc≈σh=ν/(1-ν)·(σh-α·Pr)+α·Pr
Wherein, ν is Poisson's ratio；α is Biot spy's coefficient；σ h is vertical stress, MPa；
Pc=Ph+c
Wherein, PhFor liquid column hydrostatic pressure, MPa；C is the constant depending on rock and physical property of fluid.
8. segmentation reservoir pressure method of testing as claimed in claim 4 a kind of, it is characterised in that squeezing tubing string by segmentation examination and inject blockages relieving fluid to first fracturing section described in step 2, is with 1.5m3The discharge capacity squeezing 20min of/min.
9. a kind of segmentation reservoir pressure method of testing as claimed in claim 8, it is characterised in that the 1.5min before squeezing terminates described in step 3, ladder reduces discharge capacity to zero, then termination of pumping pressure measurement 1.5 hours, enrolls bottom pressure landing data with measuring truck.
10. a kind of segmentation reservoir pressure method of testing as claimed in claim 9, it is characterised in that described ladder reduces discharge capacity and refers in the 1.5min before squeezing terminates to zero, with the interval of every 25s, 0.25m3The discharge capacity ladder of/min is reduced to zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610127009.8A CN105781504B (en) | 2016-03-07 | 2016-03-07 | A kind of segmentation reservoir pressure test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610127009.8A CN105781504B (en) | 2016-03-07 | 2016-03-07 | A kind of segmentation reservoir pressure test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105781504A true CN105781504A (en) | 2016-07-20 |
| CN105781504B CN105781504B (en) | 2019-06-11 |
Family
ID=56388085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610127009.8A Active CN105781504B (en) | 2016-03-07 | 2016-03-07 | A kind of segmentation reservoir pressure test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105781504B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412486A (en) * | 2018-03-15 | 2018-08-17 | 贵州大学 | A kind of one hole multistage gas pressure real-time monitoring device of mine and its installation method |
| CN108756866A (en) * | 2018-05-08 | 2018-11-06 | 中国石油集团渤海钻探工程有限公司 | A kind of protective device of underground resistivity female thread |
| CN110905494A (en) * | 2019-11-22 | 2020-03-24 | 中国石油天然气股份有限公司 | Horizontal well shaft reservoir heterogeneous degree judging pipe column and judging method |
| CN111852449A (en) * | 2020-09-09 | 2020-10-30 | 哈尔滨艾拓普科技有限公司 | Continuous dragging type horizontal well produced liquid sectional test system |
| CN111852422A (en) * | 2020-07-23 | 2020-10-30 | 西安诚科石油工程技术服务有限公司 | Compact single-layer sectional treatment method and treatment device for high-pressure water under-injection well |
| CN112377170A (en) * | 2021-01-08 | 2021-02-19 | 中国石油大学胜利学院 | Sand control well oil reservoir testing device |
| CN112878996A (en) * | 2021-01-29 | 2021-06-01 | 中国石油天然气集团有限公司 | Method for judging and identifying fracture channeling of fractured horizontal well |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338663A (en) * | 2008-08-07 | 2009-01-07 | 大庆油田有限责任公司 | Horizontal well mechanical staged fracturing blocking-proof process pipe column |
| RU2354810C1 (en) * | 2008-06-07 | 2009-05-10 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Method for simultaneous-separate operation of pressure well |
| CN104533375A (en) * | 2014-12-26 | 2015-04-22 | 中国石油天然气股份有限公司 | Natural fractured reservoir fracturing reformation method |
| CN104763394A (en) * | 2015-03-23 | 2015-07-08 | 新疆罡拓能源科技有限公司 | Segment transforming process for well-completion acid fracturing of open-hole horizontal well of oil gas well |
| CN105257288A (en) * | 2015-11-16 | 2016-01-20 | 中石化石油工程技术服务有限公司 | Method for determining tight reservoir original reservoir pressure based on injection pressure decline well testing technology |
-
2016
- 2016-03-07 CN CN201610127009.8A patent/CN105781504B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2354810C1 (en) * | 2008-06-07 | 2009-05-10 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Method for simultaneous-separate operation of pressure well |
| CN101338663A (en) * | 2008-08-07 | 2009-01-07 | 大庆油田有限责任公司 | Horizontal well mechanical staged fracturing blocking-proof process pipe column |
| CN104533375A (en) * | 2014-12-26 | 2015-04-22 | 中国石油天然气股份有限公司 | Natural fractured reservoir fracturing reformation method |
| CN104763394A (en) * | 2015-03-23 | 2015-07-08 | 新疆罡拓能源科技有限公司 | Segment transforming process for well-completion acid fracturing of open-hole horizontal well of oil gas well |
| CN105257288A (en) * | 2015-11-16 | 2016-01-20 | 中石化石油工程技术服务有限公司 | Method for determining tight reservoir original reservoir pressure based on injection pressure decline well testing technology |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412486A (en) * | 2018-03-15 | 2018-08-17 | 贵州大学 | A kind of one hole multistage gas pressure real-time monitoring device of mine and its installation method |
| CN108756866A (en) * | 2018-05-08 | 2018-11-06 | 中国石油集团渤海钻探工程有限公司 | A kind of protective device of underground resistivity female thread |
| CN110905494A (en) * | 2019-11-22 | 2020-03-24 | 中国石油天然气股份有限公司 | Horizontal well shaft reservoir heterogeneous degree judging pipe column and judging method |
| CN111852422A (en) * | 2020-07-23 | 2020-10-30 | 西安诚科石油工程技术服务有限公司 | Compact single-layer sectional treatment method and treatment device for high-pressure water under-injection well |
| CN111852422B (en) * | 2020-07-23 | 2022-06-07 | 西安诚科石油工程技术服务有限公司 | Compact single-layer sectional treatment method and treatment device for high-pressure water under-injection well |
| CN111852449A (en) * | 2020-09-09 | 2020-10-30 | 哈尔滨艾拓普科技有限公司 | Continuous dragging type horizontal well produced liquid sectional test system |
| CN111852449B (en) * | 2020-09-09 | 2022-11-25 | 哈尔滨艾拓普科技有限公司 | Continuous dragging type horizontal well produced liquid sectional test system |
| CN112377170A (en) * | 2021-01-08 | 2021-02-19 | 中国石油大学胜利学院 | Sand control well oil reservoir testing device |
| CN112377170B (en) * | 2021-01-08 | 2021-03-26 | 中国石油大学胜利学院 | Sand control well oil reservoir testing device |
| CN112878996A (en) * | 2021-01-29 | 2021-06-01 | 中国石油天然气集团有限公司 | Method for judging and identifying fracture channeling of fractured horizontal well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105781504B (en) | 2019-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105781504A (en) | Pressure testing method for segmented oil pool and segmented trial-squeezing tubing string | |
| CN106522928B (en) | Well testing method for unstable pressure drop of well logging head by stopping pump after acidizing and fracturing | |
| CN103573263B (en) | The horizontal well stream of a kind of tight sandstone reservoir fracturing production is installed with meter method | |
| CN107630686B (en) | compact oil energy supplementing method for staggered displacement and imbibition displacement between horizontal well sections | |
| CN105604534A (en) | Hydraulically affected fracturing process method for increasing production of coal-bed gas reservoir | |
| CN107965305A (en) | One kind layering refracturing method | |
| CN105114061A (en) | String and method for quickly surveying water in horizontal well by multi-parameter combined test without moving string | |
| CN107503727B (en) | It is a kind of that a layer hydraulic fracturing range investigation method is worn based on in-situ stress monitoring | |
| CN109751037A (en) | A kind of normal pressure shale gas reservoir high frequency change displacement volume fracturing process | |
| CN104406895A (en) | Novel coal bed permeability testing device and method | |
| CN110847894B (en) | Method for determining flow pressure of underground throttling gas well | |
| CN214576942U (en) | Experimental device for simulating low-permeability reservoir energy storage and permeability increase | |
| CN109323971A (en) | A kind of rock stratum bottom plate seepage flow gushing water experimental rig and test method | |
| CN202064936U (en) | Wireless-transmission borehole shutin pressure measuring device | |
| CN103048184A (en) | Testing method of breakthrough pressure of repeated fracturing plugging agent | |
| CN113743037B (en) | Method for calculating water injection induced dynamic fracture change diversion capacity of low-permeability oil reservoir | |
| CN107269265A (en) | A kind of system and method for optimizing and revising oilwell produced fluid amount | |
| CN204255815U (en) | A kind of novel coal seam permeability tester for testing | |
| CN105804713A (en) | Method for rapidly determining water-injection starting pressure of wellheads in all small layers of water injection well | |
| CN103048090A (en) | Method for evaluating plugging action of plugging agent on crack | |
| CN104632195A (en) | Gas lift flow assistance horizontal well water exploration pipe column and method | |
| CN206957695U (en) | A kind of system for optimizing and revising oilwell produced fluid amount | |
| CN215860141U (en) | Horizontal well liquid production section testing pipe column based on tracer marking | |
| CN102787840B (en) | Measuring method of multilayer static pressure measuring apparatus | |
| CN205025412U (en) | Many parameter combination of motionless tubular column of horizontal well test quick water detection tubular column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |