CN110905494A - Horizontal well shaft reservoir heterogeneous degree judging pipe column and judging method - Google Patents
Horizontal well shaft reservoir heterogeneous degree judging pipe column and judging method Download PDFInfo
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- CN110905494A CN110905494A CN201911153958.3A CN201911153958A CN110905494A CN 110905494 A CN110905494 A CN 110905494A CN 201911153958 A CN201911153958 A CN 201911153958A CN 110905494 A CN110905494 A CN 110905494A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The invention discloses a pipe column and a method for judging the heterogeneous degree of a horizontal well shaft reservoir stratum, wherein the pipe column comprises a guide screw plug, a tail pipe, a multi-stage connection unit, a connection oil pipe and a top oil pipe, the guide screw plug is connected with one end of the tail pipe, the other end of the tail pipe is connected with the multi-stage connection unit, the multi-stage connection unit is communicated with an oil well pump through the connection oil pipe, the upper end of the oil well pump is connected with one end of a sucker rod arranged in the top oil pipe, the other end of the sucker rod is connected with a ground. The invention utilizes the packer to clamp and open the testing interval, each interval is provided with a corresponding storage type pressure gauge, the storage type pressure gauge measures the pressure recovery of different testing intervals, the pressure recovery is produced through ground swabbing, then the storage type pressure gauge is taken out to play back pressure data, and the stratum permeability of each testing interval is inversely worked out according to the actually measured pressure recovery curve, so that the permeability of each testing interval can be effectively obtained, and the heterogeneous degree of a shaft well bore of a horizontal well is obtained.
Description
Technical Field
The invention belongs to the technical field of petroleum industry, and particularly relates to a tubular column and a method for judging the heterogeneous degree of a horizontal well shaft reservoir stratum.
Background
At present, because the difference between horizontal well sections is large, partial sections can meet water in advance to cause water meeting of the whole well and influence the yield, and in order to effectively treat the water meeting problem, a water outlet section must be found out. The existing water finding process mainly uses mechanical water finding and test water finding, but has the problems of long construction period and high cost. The conventional horizontal well stopping pressure measurement, bottom closing pressure measurement modes and flow test data are mainly applied to vertical well testing at present, but for multi-section fractured horizontal wells, the evaluation of the productivity in sections cannot be realized through testing, and the cross flow between seams and the heterogeneous degree of a shaft reservoir can be identified.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a tubular column and a method for judging the heterogeneous degree of a horizontal well shaft reservoir, and overcomes the defects that in the prior art, the non-homogeneous degree of the horizontal well shaft reservoir is 1: the problems of long construction period and high cost exist in mechanical water detection and water detection test; 2: the modes of stopping and measuring pressure of the horizontal well and closing the well at the bottom of the horizontal well are not suitable for a multi-section fractured horizontal well; 3: the prior art can not realize the evaluation of the segmented productivity through testing, and can identify the channeling among seams, the heterogeneous degree of a shaft reservoir and the like.
In order to solve the technical problem, the technical scheme of the invention is as follows: the utility model provides a tubular column is differentiateed to heterogeneous degree of horizontal well pit shaft reservoir, includes guide plug, tail pipe, multi-stage connection unit, connecting oil pipe and top oil pipe, wherein guide plug connects tail pipe one end, multi-stage connection unit is connected to the tail pipe other end, and wherein multi-stage connection unit is through connecting oil pipe and oil-well pump intercommunication, the sucker rod one end of establishing in the top oil pipe is connected to the oil-well pump upper end, and wherein ground beam-pumping unit is connected to the sucker rod other end, and wherein top oil pipe is connected to the well.
Preferably, the multi-stage connection unit comprises a plurality of storage pressure gauges and a plurality of packers, the plurality of packers are used for blocking off a plurality of test intervals of the test well, and the plurality of storage pressure gauges are used for performing segmented pressure test, wherein one storage pressure gauge corresponds to one test interval.
Preferably, the multistage connection unit comprises a first storage type pressure gauge, a first packer, a second storage type pressure gauge, a second packer, a third storage type pressure gauge … … n-1 packer and an n storage type pressure gauge which are sequentially connected through a connecting oil pipe, wherein the first storage type pressure gauge is connected with a tail pipe, the n storage type pressure gauge is communicated with an oil well pump through the connecting oil pipe, the first packer, the second packer … … and the n-1 packer are respectively arranged between two adjacent test intervals, and the first storage type pressure gauge, the second storage type pressure gauge, the third storage type pressure gauge … … and the n storage type pressure gauge are respectively arranged at each test interval.
Preferably, each storage type pressure gauge is a CY-2 type storage type pressure gauge, the pressure measuring range of the pressure gauge is 0-70 Mpa, and each packer is a compression packer.
Preferably, a screen pipe is arranged on a connecting oil pipe between the multistage connecting unit and the oil well pump.
Preferably, the method for judging the heterogeneous degree of the horizontal well shaft reservoir stratum comprises the following steps:
step 1) connecting and judging tubular columns: preparing corresponding guide plug, tail pipe, a plurality of storage type pressure gauges, a plurality of packers, connecting oil pipe and top oil pipe according to the number of test intervals of the test well, connecting the guide plug, the tail pipe, the storage type pressure gauges, the packers, the connecting oil pipe and the top oil pipe in sequence, and setting the acquisition time of each storage type pressure gauge on the ground by taking minutes as a time unit;
step 2), a judging pipe column is put in: combining the pipe columns according to the number of test intervals of the test well, then putting the pipe columns into the well, putting each packer to a preset position, ensuring that each test interval corresponds to a storage type pressure gauge, connecting an oil well pump with a sucker rod, putting the sucker rod into a top oil pipe, and connecting the sucker rod with a ground pumping unit;
step 3), swabbing production: continuous production for a period of time t by using ground pumping unitpThen, measuring the total liquid amount of the well head to be q through the ground;
step 4) pressure recovery test: setting each packer to open each testing layer section, wherein each testing layer section is correspondingly provided with a storage type pressure gauge, closing the well to measure pressure recovery, and the closing time is
Carrying out a segmented pressure recovery test by using a storage type pressure gauge;
step 5), pulling out a distinguishing pipe column: lifting the distinguishing pipe column, unsealing each packer and pulling out the distinguishing pipe column;
step 6) playback data: taking down each storage type pressure gauge, playing back data, drawing a pressure curve of each test interval, obtaining the ratio of the initial pressure of each test interval to the tail end recovery pressure, and dividing the total liquid amount of the well mouth into absolute liquid production of each test interval according to the speed of pressure recovery of each test interval;
step 7) data analysis: and fitting a curve slope according to the pressure curve of each test interval, obtaining the slope of a straight line segment of the curve by using a formula of a Horner curve analysis method, enabling the slope of the straight line segment to be the same as the slope of the fitted curve, and reversely calculating the permeability k of each test interval of the stratum.
Preferably, the formula of the Horner curve analysis method in the step 7) and the slope formula of the straight line segment are as follows:
in the formula:
Pwsrecovering pressure, MPa, for the tail end;
Piinitial pressure, MPa;
b is the volume coefficient of the crude oil;
u is the fluid viscosity, mPa · s;
k is the formation permeability, um2；
h is the formation thickness, m;
q is the total liquid amount of the well head measured on the ground, m3/d；
tpProduction time, h;
Compared with the prior art, the invention has the advantages that:
(1) the judging pipe column comprises a guide plug, a tail pipe, a multi-stage connecting unit, a connecting oil pipe and a top oil pipe which are sequentially connected, an oil well pump is connected with a sucker rod and is put into the top oil pipe, the sucker rod is connected with a ground pumping unit, the multi-stage connecting unit comprises a plurality of storage type pressure gauges and a plurality of packers, the corresponding storage type pressure gauges and the corresponding packers can be arranged according to the number of testing intervals, the plurality of packers are utilized to block off a plurality of testing intervals of a testing well, a plurality of storage type pressure gauges are utilized to carry out segmented pressure testing, the pressure data are played back through ground swabbing production, the storage type pressure gauges are used for playing back pressure data, the stratum permeability of each testing interval is reversely worked out according to an actually measured pressure recovery curve, the permeability of each testing interval can be effectively obtained;
(2) the discrimination method of the invention realizes the explanation of stratum permeability of each test interval by a horizontal well production and simultaneous subsection pressure measurement method, discriminates the heterogeneous degree of a reservoir in the direction of a shaft of the horizontal well, can determine the position of high liquid production and the direction of water coming at the same time, and provides parameters such as pressure, liquid amount, half-length of cracks and the like of the relevant test interval, the discrimination method of the invention has simple process, high test accuracy, low cost and short period, and solves the problems of inaccurate well measurement of low liquid amount, high cost and long subsection production test method period of the conventional electric measurement method;
(3) the tubular column for distinguishing the heterogeneous degree of the horizontal well shaft reservoir is simple in structure, convenient to use and high in practicability, and can be widely applied to distinguishing the heterogeneous degree of various horizontal well shaft reservoirs.
Drawings
FIG. 1 is a schematic structural diagram of a horizontal well shaft reservoir heterogeneous degree judging pipe column;
FIG. 2 is a flow chart of a method for judging the heterogeneous degree of a horizontal well shaft reservoir.
Description of reference numerals:
1-guide plug, 2-tail pipe, 3-first storage type pressure gauge, 4-first packer, 5-second storage type pressure gauge, 6-second packer, 7-third storage type pressure gauge, 8-sieve tube, 9-connecting oil pipe, 10-oil pump, 11-sucker rod, 12-ground oil pumping machine and 13-top oil pipe.
Detailed Description
The following describes embodiments of the present invention with reference to examples:
it should be noted that the structures, proportions, sizes, and other elements shown in the specification are included for the purpose of understanding and reading only, and are not intended to limit the scope of the invention, which is defined by the claims, and any modifications of the structures, changes in the proportions and adjustments of the sizes, without affecting the efficacy and attainment of the same.
In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example 1
As shown in figure 1, the invention discloses a horizontal well shaft reservoir heterogeneous degree judging pipe column which comprises a guide plug 1, a tail pipe 2, a multi-stage connecting unit, a connecting oil pipe 9 and a top oil pipe 13, wherein the guide plug 1 is connected with one end of the tail pipe 2, the other end of the tail pipe 2 is connected with the multi-stage connecting unit, the multi-stage connecting unit is communicated with an oil well pump 10 through the connecting oil pipe 9, the upper end of the oil well pump 10 is connected with one end of a sucker rod 11 arranged in the top oil pipe 13, the other end of the sucker rod 11 is connected with a ground oil pumping unit 12, and the top oil pipe 13.
Example 2
As shown in figure 1, the invention discloses a horizontal well shaft reservoir heterogeneous degree judging pipe column which comprises a guide plug 1, a tail pipe 2, a multi-stage connecting unit, a connecting oil pipe 9 and a top oil pipe 13, wherein the guide plug 1 is connected with one end of the tail pipe 2, the other end of the tail pipe 2 is connected with the multi-stage connecting unit, the multi-stage connecting unit is communicated with an oil well pump 10 through the connecting oil pipe 9, the upper end of the oil well pump 10 is connected with one end of a sucker rod 11 arranged in the top oil pipe 13, the other end of the sucker rod 11 is connected with a ground oil pumping unit 12, and the top oil pipe 13.
Preferably, as shown in fig. 1, the multi-stage connection unit includes a plurality of storage pressure gauges and a plurality of packers, the plurality of packers are used for blocking off a plurality of test intervals of the test well, and the plurality of storage pressure gauges are used for performing a step pressure test, wherein one storage pressure gauge corresponds to one test interval.
Example 3
As shown in figure 1, the invention discloses a horizontal well shaft reservoir heterogeneous degree judging pipe column which comprises a guide plug 1, a tail pipe 2, a multi-stage connecting unit, a connecting oil pipe 9 and a top oil pipe 13, wherein the guide plug 1 is connected with one end of the tail pipe 2, the other end of the tail pipe 2 is connected with the multi-stage connecting unit, the multi-stage connecting unit is communicated with an oil well pump 10 through the connecting oil pipe 9, the upper end of the oil well pump 10 is connected with one end of a sucker rod 11 arranged in the top oil pipe 13, the other end of the sucker rod 11 is connected with a ground oil pumping unit 12, and the top oil pipe 13.
Preferably, as shown in fig. 1, the multi-stage connection unit includes a plurality of storage pressure gauges and a plurality of packers, the plurality of packers are used for blocking off a plurality of test intervals of the test well, and the plurality of storage pressure gauges are used for performing a step pressure test, wherein one storage pressure gauge corresponds to one test interval.
Preferably, as shown in fig. 1, the multistage connection unit includes a first storage type pressure gauge 3, a first packer 4, a second storage type pressure gauge 5, a second packer 6, a third storage type pressure gauge 7 … …, an n-1 th packer and an n-1 th storage type pressure gauge which are sequentially connected through a connecting oil pipe 9, wherein the first storage type pressure gauge 3 is connected with a tail pipe 2, the n-th storage type pressure gauge is communicated with an oil well pump 10 through the connecting oil pipe 9, the first packer 4, the second packer 6 … … and the n-1 th packer are respectively arranged between two adjacent test intervals, and the first storage type pressure gauge 3, the second storage type pressure gauge 5 … … and the n-th storage type pressure gauge are respectively arranged at each test interval.
Example 4
As shown in figure 1, the invention discloses a horizontal well shaft reservoir heterogeneous degree judging pipe column which comprises a guide plug 1, a tail pipe 2, a multi-stage connecting unit, a connecting oil pipe 9 and a top oil pipe 13, wherein the guide plug 1 is connected with one end of the tail pipe 2, the other end of the tail pipe 2 is connected with the multi-stage connecting unit, the multi-stage connecting unit is communicated with an oil well pump 10 through the connecting oil pipe 9, the upper end of the oil well pump 10 is connected with one end of a sucker rod 11 arranged in the top oil pipe 13, the other end of the sucker rod 11 is connected with a ground oil pumping unit 12, and the top oil pipe 13.
Preferably, as shown in fig. 1, the multi-stage connection unit includes a plurality of storage pressure gauges and a plurality of packers, the plurality of packers are used for blocking off a plurality of test intervals of the test well, and the plurality of storage pressure gauges are used for performing a step pressure test, wherein one storage pressure gauge corresponds to one test interval.
Preferably, as shown in fig. 1, the multistage connection unit includes a first storage type pressure gauge 3, a first packer 4, a second storage type pressure gauge 5, a second packer 6, a third storage type pressure gauge 7 … …, an n-1 th packer and an n-1 th storage type pressure gauge which are sequentially connected through a connecting oil pipe 9, wherein the first storage type pressure gauge 3 is connected with a tail pipe 2, the n-th storage type pressure gauge is communicated with an oil well pump 10 through the connecting oil pipe 9, the first packer 4, the second packer 6 … … and the n-1 th packer are respectively arranged between two adjacent test intervals, and the first storage type pressure gauge 3, the second storage type pressure gauge 5, the third storage type pressure gauge 7 … … and the n-1 th storage type pressure gauge are respectively arranged at each test interval.
Preferably, each storage type pressure gauge is a CY-2 type storage type pressure gauge, the pressure measuring range of the pressure gauge is 0-70 Mpa, and each packer is a compression packer.
Example 5
As shown in figure 1, the invention discloses a horizontal well shaft reservoir heterogeneous degree judging pipe column which comprises a guide plug 1, a tail pipe 2, a multi-stage connecting unit, a connecting oil pipe 9 and a top oil pipe 13, wherein the guide plug 1 is connected with one end of the tail pipe 2, the other end of the tail pipe 2 is connected with the multi-stage connecting unit, the multi-stage connecting unit is communicated with an oil well pump 10 through the connecting oil pipe 9, the upper end of the oil well pump 10 is connected with one end of a sucker rod 11 arranged in the top oil pipe 13, the other end of the sucker rod 11 is connected with a ground oil pumping unit 12, and the top oil pipe 13.
Preferably, as shown in fig. 1, the multi-stage connection unit includes a plurality of storage pressure gauges and a plurality of packers, the plurality of packers are used for blocking off a plurality of test intervals of the test well, and the plurality of storage pressure gauges are used for performing a step pressure test, wherein one storage pressure gauge corresponds to one test interval.
Preferably, as shown in fig. 1, the multistage connection unit includes a first storage type pressure gauge 3, a first packer 4, a second storage type pressure gauge 5, a second packer 6, a third storage type pressure gauge 7 … …, an n-1 th packer and an n-1 th storage type pressure gauge which are sequentially connected through a connecting oil pipe 9, wherein the first storage type pressure gauge 3 is connected with a tail pipe 2, the n-th storage type pressure gauge is communicated with an oil well pump 10 through the connecting oil pipe 9, the first packer 4, the second packer 6 … … and the n-1 th packer are respectively arranged between two adjacent test intervals, and the first storage type pressure gauge 3, the second storage type pressure gauge 5, the third storage type pressure gauge 7 … … and the n-1 th storage type pressure gauge are respectively arranged at each test interval.
Preferably, each storage type pressure gauge is a CY-2 type storage type pressure gauge, the pressure measuring range of the pressure gauge is 0-70 Mpa, and each packer is a compression packer.
Preferably, as shown in fig. 1, a screen 8 is arranged on a connecting oil pipe 9 between the multi-stage connecting unit and the oil well pump 10.
Example 6
As shown in figure 1, the invention discloses a horizontal well shaft reservoir heterogeneous degree judging pipe column which comprises a guide plug 1, a tail pipe 2, a multi-stage connecting unit, a connecting oil pipe 9 and a top oil pipe 13, wherein the guide plug 1 is connected with one end of the tail pipe 2, the other end of the tail pipe 2 is connected with the multi-stage connecting unit, the multi-stage connecting unit is communicated with an oil well pump 10 through the connecting oil pipe 9, the upper end of the oil well pump 10 is connected with one end of a sucker rod 11 arranged in the top oil pipe 13, the other end of the sucker rod 11 is connected with a ground oil pumping unit 12, and the top oil pipe 13.
Preferably, as shown in fig. 1, the multi-stage connection unit includes a plurality of storage pressure gauges and a plurality of packers, the plurality of packers are used for blocking off a plurality of test intervals of the test well, and the plurality of storage pressure gauges are used for performing a step pressure test, wherein one storage pressure gauge corresponds to one test interval.
Preferably, as shown in fig. 1, the multistage connection unit includes a first storage type pressure gauge 3, a first packer 4, a second storage type pressure gauge 5, a second packer 6, a third storage type pressure gauge 7 … …, an n-1 th packer and an n-1 th storage type pressure gauge which are sequentially connected through a connecting oil pipe 9, wherein the first storage type pressure gauge 3 is connected with a tail pipe 2, the n-th storage type pressure gauge is communicated with an oil well pump 10 through the connecting oil pipe 9, the first packer 4, the second packer 6 … … and the n-1 th packer are respectively arranged between two adjacent test intervals, and the first storage type pressure gauge 3, the second storage type pressure gauge 5, the third storage type pressure gauge 7 … … and the n-1 th storage type pressure gauge are respectively arranged at each test interval.
Preferably, each storage type pressure gauge is a CY-2 type storage type pressure gauge, the pressure measuring range of the pressure gauge is 0-70 Mpa, and each packer is a compression packer.
Preferably, as shown in fig. 1, a screen 8 is arranged on a connecting oil pipe 9 between the multi-stage connecting unit and the oil well pump 10.
Preferably, as shown in fig. 1 to 2, the method for judging the heterogeneous degree of the horizontal well shaft reservoir stratum comprises the following steps:
step 1) connecting and judging tubular columns: preparing a corresponding guide plug 1, a tail pipe 2, a plurality of storage type pressure gauges, a plurality of packers, a connecting oil pipe 9 and a top oil pipe 13 according to the number of test intervals of the test well, sequentially connecting the guide plug, the tail pipe 2, the plurality of storage type pressure gauges, the plurality of packers, the connecting oil pipe 9 and the top oil pipe 13, and setting the acquisition time of each storage type pressure gauge on the ground by taking minutes as a time unit;
step 2), a judging pipe column is put in: combining the pipe columns according to the number of test intervals of the test well, then putting the pipe columns into the well, putting each packer to a preset position, ensuring that each test interval corresponds to a storage type pressure gauge, connecting an oil well pump 10 with a sucker rod 11, putting the sucker rod 11 into a top oil pipe 13, and connecting the sucker rod 11 with a ground pumping unit 12;
step 3), swabbing production: continuously producing for a period of time t by using the ground pumping unit 12pThen, measuring the total liquid amount of the well head to be q through the ground;
step 4) pressure recovery test: setting sealEach packer is clamped to open each testing layer section, each testing layer section is correspondingly provided with a storage type pressure gauge, the well closing pressure recovery is carried out, and the well closing time is
Carrying out a segmented pressure recovery test by using a storage type pressure gauge;
step 5), pulling out a distinguishing pipe column: lifting the distinguishing pipe column, unsealing each packer and pulling out the distinguishing pipe column;
step 6) playback data: taking down each storage type pressure gauge, playing back data, drawing a pressure curve of each test interval, obtaining the ratio of the initial pressure of each test interval to the tail end recovery pressure, and dividing the total liquid amount of the well mouth into absolute liquid production of each test interval according to the speed of pressure recovery of each test interval;
step 7) data analysis: and fitting a curve slope according to the pressure curve of each test interval, obtaining the slope of a straight line segment of the curve by using a formula of a Horner curve analysis method, enabling the slope of the straight line segment to be the same as the slope of the fitted curve, and reversely calculating the permeability k of each test interval of the stratum.
Example 7
As shown in figure 1, the invention discloses a horizontal well shaft reservoir heterogeneous degree judging pipe column which comprises a guide plug 1, a tail pipe 2, a multi-stage connecting unit, a connecting oil pipe 9 and a top oil pipe 13, wherein the guide plug 1 is connected with one end of the tail pipe 2, the other end of the tail pipe 2 is connected with the multi-stage connecting unit, the multi-stage connecting unit is communicated with an oil well pump 10 through the connecting oil pipe 9, the upper end of the oil well pump 10 is connected with one end of a sucker rod 11 arranged in the top oil pipe 13, the other end of the sucker rod 11 is connected with a ground oil pumping unit 12, and the top oil pipe 13.
Preferably, as shown in fig. 1, the multi-stage connection unit includes a plurality of storage pressure gauges and a plurality of packers, the plurality of packers are used for blocking off a plurality of test intervals of the test well, and the plurality of storage pressure gauges are used for performing a step pressure test, wherein one storage pressure gauge corresponds to one test interval.
Preferably, as shown in fig. 1, the multistage connection unit includes a first storage type pressure gauge 3, a first packer 4, a second storage type pressure gauge 5, a second packer 6, a third storage type pressure gauge 7 … …, an n-1 th packer and an n-1 th storage type pressure gauge which are sequentially connected through a connecting oil pipe 9, wherein the first storage type pressure gauge 3 is connected with a tail pipe 2, the n-th storage type pressure gauge is communicated with an oil well pump 10 through the connecting oil pipe 9, the first packer 4, the second packer 6 … … and the n-1 th packer are respectively arranged between two adjacent test intervals, and the first storage type pressure gauge 3, the second storage type pressure gauge 5, the third storage type pressure gauge 7 … … and the n-1 th storage type pressure gauge are respectively arranged at each test interval.
Preferably, each storage type pressure gauge is a CY-2 type storage type pressure gauge, the pressure measuring range of the pressure gauge is 0-70 Mpa, and each packer is a compression packer.
Preferably, as shown in fig. 1, a screen 8 is arranged on a connecting oil pipe 9 between the multi-stage connecting unit and the oil well pump 10.
Preferably, as shown in fig. 1 to 2, the method for judging the heterogeneous degree of the horizontal well shaft reservoir stratum comprises the following steps:
step 1) connecting and judging tubular columns: preparing a corresponding guide plug 1, a tail pipe 2, a plurality of storage type pressure gauges, a plurality of packers, a connecting oil pipe 9 and a top oil pipe 13 according to the number of test intervals of the test well, sequentially connecting the guide plug, the tail pipe 2, the plurality of storage type pressure gauges, the plurality of packers, the connecting oil pipe 9 and the top oil pipe 13, and setting the acquisition time of each storage type pressure gauge on the ground by taking minutes as a time unit;
step 2), a judging pipe column is put in: combining the pipe columns according to the number of test intervals of the test well, then putting the pipe columns into the well, putting each packer to a preset position, ensuring that each test interval corresponds to a storage type pressure gauge, connecting an oil well pump 10 with a sucker rod 11, putting the sucker rod 11 into a top oil pipe 13, and connecting the sucker rod 11 with a ground pumping unit 12;
step 3), swabbing production: continuously producing for a period of time t by using the ground pumping unit 12pThen, measuring the total liquid amount of the well head to be q through the ground;
step 4) pressure recovery test: setting each packer to block each test interval, each test intervalCorresponding to a storage type pressure gauge, the shut-in pressure is recovered, and the shut-in time is
Carrying out a segmented pressure recovery test by using a storage type pressure gauge;
step 5), pulling out a distinguishing pipe column: lifting the distinguishing pipe column, unsealing each packer and pulling out the distinguishing pipe column;
step 6) playback data: taking down each storage type pressure gauge, playing back data, drawing a pressure curve of each test interval, obtaining the ratio of the initial pressure of each test interval to the tail end recovery pressure, and dividing the total liquid amount of the well mouth into absolute liquid production of each test interval according to the speed of pressure recovery of each test interval;
step 7) data analysis: and fitting a curve slope according to the pressure curve of each test interval, obtaining the slope of a straight line segment of the curve by using a formula of a Horner curve analysis method, enabling the slope of the straight line segment to be the same as the slope of the fitted curve, and reversely calculating the permeability k of each test interval of the stratum.
Preferably, the formula of the Horner curve analysis method in the step 7) and the slope formula of the straight line segment are as follows:
in the formula:
Pwsrecovering pressure, MPa, for the tail end;
Piinitial pressure, MPa;
b is the volume coefficient of the crude oil;
u is the fluid viscosity, mPa · s;
k is the formation permeability, um2；
h is the formation thickness, m;
q is the total liquid amount of the well head measured on the ground, m3/d；
tpFor the life of a living beingProduction time h;
Example 8
The invention is further detailed by taking a test of one fracturing reconstruction three-section horizontal well as an example:
three test intervals are reformed by fracturing a certain horizontal well, wherein the oil deposit porosity of a spray point 1 is 11.1%, the oil layer thickness is 11.3m, the oil deposit porosity of a spray point 2 is 10.54%, the oil layer thickness is 32m, the oil deposit porosity of a spray point 3 is 10.8%, the oil layer thickness is 38.4m, the fluid viscosity is 1.85mPa & s, the crude oil volume coefficient is 1.2, and the comprehensive compression coefficient is 0.00149MPa-1The well has a production rate of 12.48m3D produced 100 h.
The field testing process of the tubular column for judging the heterogeneous degree of the horizontal well shaft reservoir is as follows:
step 1) connecting and judging tubular columns: according to a design scheme, preparing a corresponding guide plug 1, a tail pipe 2, a plurality of storage type pressure gauges, a plurality of packers, a connecting oil pipe 9 and a top oil pipe 13 according to the number of test intervals of a test well, wherein the plurality of storage type pressure gauges comprise a first packer 4, a second packer 6, a first storage type pressure gauge 3, a second storage type pressure gauge 5 and a third storage type pressure gauge 7, and the acquisition time of each storage type pressure gauge is set on the ground in minutes as a time unit;
step 2), setting a distinguishing pipe column: combining pipe columns according to the number of test intervals of the test well, then putting the pipe columns into the well, putting a first packer 4 and a second packer 6 to preset positions, ensuring that each test interval corresponds to a storage type pressure gauge, connecting an oil well pump 10 and a sucker rod 11, putting the oil well pump 10 and the sucker rod 11 into a top oil pipe 13, and connecting the sucker rod 11 and a ground oil pumping unit 12;
step 3), swabbing production: the ground pumping unit 12 continuously produces for a period of time tpThen, the total liquid amount of the well head is obtained through surface measurementIs q;
step 4) pressure recovery test: setting a first packer 4 and a second packer 6 to open each test layer section, wherein each test layer section is correspondingly provided with a storage type pressure gauge, and closing the well to measure pressure recovery for the time of closing the well
Carrying out a segmented pressure recovery test by using a storage type pressure gauge;
step 5), pulling out a distinguishing pipe column: lifting the distinguishing pipe column, unsealing each packer and pulling out the distinguishing pipe column;
step 6) playback data: taking down the first storage type pressure gauge 3, the second storage type pressure gauge 5 and the third storage type pressure gauge 7, and playing back data, wherein the initial pressure of the spraying point 1 is 16.6MPa, and the tail end recovery pressure is 18.5 MPa; the initial pressure of the spraying point 2 is 16.4MPa, and the tail end recovery pressure is 16.8 MPa; the initial pressure of the spraying point 3 is 16.1MPa, and the tail end recovery pressure is 22.5 MPa; drawing pressure curves of all sections, solving the ratio of the initial pressure of each section to the recovery pressure of the tail end, wherein the ratio of the pressure at the spraying point 1 is 1.11, the ratio of the pressure at the spraying point 2 is 1.02, the ratio of the pressure at the spraying point 3 is 1.40, the total liquid amount of the well head is poured into absolute liquid production of each section according to the recovery speed of the pressure of each section, and the absolute liquid production of the spraying point 1 is 3.93m3The absolute liquid production at the spraying point 2 is 3.61m3The absolute liquid production at the spray point 3 is 4.93m3；
Step 7) data analysis: fitting a curve slope M according to the measured pressure data Honer curve, and M at the position of the spraying point 11=0.92, M at the position of the spray point 22=0.652, M at the spray point 3 position3=0.135, and then using Horner curve analysis formula
The working principle and the working process of the invention are as follows:
as shown in figures 1-2, the invention discloses a horizontal well shaft reservoir heterogeneous degree judging pipe column and a judging method, which are designed for providing basis for judging the water outlet position of a subsequent horizontal well and selecting a well by measures, wherein a guide plug 1, a tail pipe 2, a first storage type pressure gauge 3, a first packer 4, a second storage type pressure gauge 5, a second packer 6, a third storage type pressure gauge 7 … … sieve pipe 8, a connecting oil pipe 9 and a top oil pipe 13 are sequentially connected to the underground horizontal section of the pipe column from a toe part to a heel part, an oil well pump 10 is arranged in the top oil pipe 13, the oil well pump 10 is connected with an oil pumping rod 11, and the oil pumping rod 11 is connected with a ground oil pumping unit 12. The invention is characterized in that the pipe column seals each test layer section by putting in a packer, 12 pumping production is carried out by a ground pumping unit, a storage type pressure gauge is utilized to carry out segmented pressure test underground, the total liquid quantity of a well head for well opening production is q, and the oil well continuously produces for a period of time tpThe pressure recovery is measured after the well is closed, and the test time is
The method comprises the steps of dividing the total liquid amount of an oil well mouth into absolute liquid production of each test interval according to the change speed of a pressure test curve, fitting a curve slope M according to an actually measured pressure curve, and reversely calculating the formation permeability k by utilizing the slope of a straight line segment in a Horner curve analysis method.
The judging pipe column comprises a guide plug, a tail pipe, a multi-stage connecting unit, a connecting oil pipe and a top oil pipe which are sequentially connected, an oil well pump and a sucker rod are connected and then are put into the top oil pipe, the sucker rod is connected with a ground pumping unit, the multi-stage connecting unit comprises a plurality of storage type pressure gauges and a plurality of packers, the corresponding storage type pressure gauges and the corresponding packers can be arranged according to the number of testing intervals, the plurality of packers are utilized to block off a plurality of testing intervals of a testing well, a plurality of storage type pressure gauges are utilized to carry out segmented pressure testing, pressure data are played back through ground swabbing production, the storage type pressure gauges are used to play back pressure data, the stratum permeability of each testing interval is inversely worked out according to an actually measured pressure recovery curve, the permeability of each testing interval can be effectively obtained.
The method for judging the permeability of the stratum of each test interval is explained by a method for simultaneously measuring the pressure in sections after the production of the horizontal well, the heterogeneous degree of the reservoir in the shaft direction of the horizontal well is judged, meanwhile, the position of high liquid production and the water incoming direction can be determined, and parameters such as the pressure, the liquid quantity, the half length of a crack and the like of the relevant test interval are provided.
The tubular column for distinguishing the heterogeneous degree of the horizontal well shaft reservoir is simple in structure, convenient to use and high in practicability, and can be widely applied to distinguishing the heterogeneous degree of various horizontal well shaft reservoirs.
The guide plug, the oil pipe, the storage type pressure gauge, the packer and the sieve pipe are all in the prior art.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (7)
1. The utility model provides a tubular column is differentiateed to heterogeneous degree in horizontal well pit shaft reservoir, its characterized in that: including guide plug (1), tail pipe (2), multi-stage connection unit, connection oil pipe (9) and top oil pipe (13), wherein tail pipe (2) one end is connected in guide plug (1), multi-stage connection unit is connected to the tail pipe (2) other end, and wherein multi-stage connection unit is through connecting oil pipe (9) and oil-well pump (10) intercommunication, oil-well pump (10) upper end is connected and is established sucker rod (11) one end in top oil pipe (13), and wherein ground beam-pumping unit (12) are connected to sucker rod (11) other end, and wherein top oil pipe (13) are connected to the well head.
2. The horizontal well shaft reservoir heterogeneous degree distinguishing pipe column according to claim 1, characterized in that: the multi-stage connection unit comprises a plurality of storage type pressure gauges and a plurality of packers, a plurality of test layer sections of the test well are clamped and opened by the packers, and segmented pressure testing is performed by the storage type pressure gauges, wherein one storage type pressure gauge corresponds to one test layer section.
3. The horizontal well shaft reservoir heterogeneous degree distinguishing pipe column according to claim 2, characterized in that: the multistage connecting unit comprises a first storage type pressure gauge (3), a first packer (4), a second storage type pressure gauge (5), a second packer (6), a third storage type pressure gauge (7) … …, an n-1 th packer and an n-1 th storage type pressure gauge which are sequentially connected through a connecting oil pipe (9), wherein the first storage type pressure gauge (3) is connected with a tail pipe (2), the n-th storage type pressure gauge is communicated with an oil well pump (10) through the connecting oil pipe (9), the first packer (4), the second packer (6) … … and the n-1 th packer are respectively arranged between two adjacent test layer sections, and the first storage type pressure gauge (3), the second storage type pressure gauge (5), the third storage type pressure gauge (7) … … and the n-th pressure gauge are respectively arranged at each test layer section.
4. The horizontal well shaft reservoir heterogeneous degree distinguishing pipe column according to claim 3, characterized in that: each storage type pressure gauge is CY-2 type storage type pressure gauge, the pressure measuring range is 0-70 Mpa, and each packer is a compression packer.
5. The horizontal well shaft reservoir heterogeneous degree distinguishing pipe column according to claim 3, characterized in that: and a screen pipe (8) is arranged on a connecting oil pipe (9) between the multistage connecting unit and the oil well pump (10).
6. The method for judging the nonhomogeneous degree of the horizontal well shaft reservoir stratum according to any one of claims 2 to 5 is characterized by comprising the following steps:
step 1) connecting and judging tubular columns: preparing a corresponding guide plug (1), a tail pipe (2), a plurality of storage type pressure gauges, a plurality of packers, a connecting oil pipe (9) and a top oil pipe (13) according to the number of test intervals of the test well, sequentially connecting the guide plug, the tail pipe, the storage type pressure gauges, the packers, the connecting oil pipe (9) and the top oil pipe, and setting the acquisition time of each storage type pressure gauge on the ground by taking minutes as a time unit;
step 2), a judging pipe column is put in: combining pipe columns according to the number of test intervals of the test well, then putting the pipe columns into the well, putting each packer to a preset position, ensuring that each test interval corresponds to a storage pressure gauge, connecting an oil well pump (10) with a sucker rod (11), putting the oil well pump into a top oil pipe (13), and connecting the sucker rod (11) with a ground oil pumping unit (12);
step 3), swabbing production: continuously producing for a period of time t by using a ground pumping unit (12)pThen, measuring the total liquid amount of the well head to be q through the ground;
step 4) pressure recovery test: setting each packer to open each testing layer section, wherein each testing layer section is correspondingly provided with a storage type pressure gauge, closing the well to measure pressure recovery, and the closing time is
Carrying out a segmented pressure recovery test by using a storage type pressure gauge;
step 5), pulling out a distinguishing pipe column: lifting the distinguishing pipe column, unsealing each packer and pulling out the distinguishing pipe column;
step 6) playback data: taking down each storage type pressure gauge, playing back data, drawing a pressure curve of each test interval, obtaining the ratio of the initial pressure of each test interval to the tail end recovery pressure, and dividing the total liquid amount of the well mouth into absolute liquid production of each test interval according to the speed of pressure recovery of each test interval;
step 7) data analysis: and fitting a curve slope according to the pressure curve of each test interval, obtaining the slope of a straight line segment of the curve by using a formula of a Horner curve analysis method, enabling the slope of the straight line segment to be the same as the slope of the fitted curve, and reversely calculating the permeability k of each test interval of the stratum.
7. The method for distinguishing the nonhomogeneous degree of the horizontal well shaft reservoir stratum according to claim 6, wherein the Horner curve analysis method in the step 7) has a formula and a slope formula of a straight line segment thereof, wherein the formula comprises:
in the formula:
Pwsrecovering pressure, MPa, for the tail end;
Piinitial pressure, MPa;
b is the volume coefficient of the crude oil;
u is the fluid viscosity, mPa · s;
k is the formation permeability, um2；
h is the formation thickness, m;
q is the total liquid amount of the well head measured on the ground, m3/d；
tpProduction time, h;
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113266320A (en) * | 2021-05-31 | 2021-08-17 | 郭子晨 | Comprehensive intelligent water finding and blocking technology for oil well |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6116340A (en) * | 1998-12-24 | 2000-09-12 | Atlantic Richfield Company | Downhole build-up pressure test using coiled tubing |
| US20130205886A1 (en) * | 2012-02-13 | 2013-08-15 | Peter S. Hegeman | Method For Determining A Permeability Or Mobility Of A Radial Flow Response Of A Reservoir |
| CN204457756U (en) * | 2014-12-17 | 2015-07-08 | 中国石油天然气股份有限公司 | A kind of horizontal well in segments pressure and pressure fall-off test tubing string |
| CN105114061A (en) * | 2015-08-31 | 2015-12-02 | 中国石油天然气股份有限公司 | String and method for quickly surveying water in horizontal well by multi-parameter combined test without moving string |
| CN105781504A (en) * | 2016-03-07 | 2016-07-20 | 中国石油天然气股份有限公司 | Pressure testing method for segmented oil pool and segmented trial-squeezing tubing string |
| CN212054672U (en) * | 2019-11-22 | 2020-12-01 | 中国石油天然气股份有限公司 | Horizontal well shaft reservoir heterogeneous degree judgment pipe column |
-
2019
- 2019-11-22 CN CN201911153958.3A patent/CN110905494A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6116340A (en) * | 1998-12-24 | 2000-09-12 | Atlantic Richfield Company | Downhole build-up pressure test using coiled tubing |
| US20130205886A1 (en) * | 2012-02-13 | 2013-08-15 | Peter S. Hegeman | Method For Determining A Permeability Or Mobility Of A Radial Flow Response Of A Reservoir |
| CN204457756U (en) * | 2014-12-17 | 2015-07-08 | 中国石油天然气股份有限公司 | A kind of horizontal well in segments pressure and pressure fall-off test tubing string |
| CN105114061A (en) * | 2015-08-31 | 2015-12-02 | 中国石油天然气股份有限公司 | String and method for quickly surveying water in horizontal well by multi-parameter combined test without moving string |
| CN105781504A (en) * | 2016-03-07 | 2016-07-20 | 中国石油天然气股份有限公司 | Pressure testing method for segmented oil pool and segmented trial-squeezing tubing string |
| CN212054672U (en) * | 2019-11-22 | 2020-12-01 | 中国石油天然气股份有限公司 | Horizontal well shaft reservoir heterogeneous degree judgment pipe column |
Non-Patent Citations (3)
| Title |
|---|
| 中国石油天然气总公司劳资局: "地层测试工", vol. 1, 石油工业出版社, pages: 200 * |
| 牛彩云等: "分段压裂水平井各段压力及供液能力研究", 石油化工应用, vol. 34, no. 03, pages 32 - 35 * |
| 王百等: "低渗透气田水平井试井解释方法探讨", 油气井测试, vol. 21, no. 03, pages 4 - 7 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266320A (en) * | 2021-05-31 | 2021-08-17 | 郭子晨 | Comprehensive intelligent water finding and blocking technology for oil well |
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