CN1928321A - Method for down-hole laminated sampling and measuring - Google Patents
Method for down-hole laminated sampling and measuring Download PDFInfo
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- CN1928321A CN1928321A CN 200510098286 CN200510098286A CN1928321A CN 1928321 A CN1928321 A CN 1928321A CN 200510098286 CN200510098286 CN 200510098286 CN 200510098286 A CN200510098286 A CN 200510098286A CN 1928321 A CN1928321 A CN 1928321A
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Abstract
The invention discloses a layered sampling test method under well for bailing well, pump well, screw pump well, electric pump well, water well, exploratory well and trial-produce well. Underground back-off test pipe string is taken by cable and located at relative testing layer, and sampling tester of testing instrument taken by cable or steel wire is put in underground back-off test pipe string. Then testing and sampling proceeds. Sampling tester or underground back-off testing pipe string is extracted out by latch jack put in with cable. The invention can test and attain layered flowing pressure; layered static pressure, temperature and flux so on in various layers while layered fluid (oil, water, air) sampling can be realized in ordinary producing condition.
Description
Technical field
The present invention relates to oilfield exploitation field well sampling measuring technology, particularly the method for sampling of oil-water well laminated distributor under well and test.
Background technology
In oilfield development process, in time obtain the oil well test data, can help the developer accurately to grasp formation characteristics, the substratum geological information of oil well, the production capacity situation of well (interval).At present, aspect oil well test, employing be that the tubing string operating type realizes that the down-hole gives up and salvage, well sampling, tester and design of string pipe are integral, and testing, are mainly having the following disadvantages aspect the sampling craft:
1, can't satisfy dynamic test, the sampling of oil well.Particularly machine-pumped oil well can't measure the dynamic test data owing to there is not essential test channel;
2, sampling, test technology need job execution, complex procedures, and long construction period, testing cost is higher;
3, can't carry out zonal testing;
4, test function is more single, can only measure 1-2 parameter, and can only measure static parameter.
At present, still not having Validity Test process meanses such as suitable zonal testing, fluid sampling occurs.
The innovation and creation content
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of laminated distributor under well sampling and method of testing that can be used for bailing well, rod-pumped well, screw bolt well, electric pump well, well, prospect pit and pilot production well is provided.Use the multiple parameters such as stratified flow pressure, layering static pressure, temperature and flow that this method can record above-mentioned serial well, can realize stratified fluid (oil, water, liquid, the gas) sampling under the ordinary production state simultaneously.
The method of Stratified Sampling test of the present invention may further comprise the steps:
Step 1, carry the down-hole with cable and give up after test string is lowered to the test purpose layer, on put the down-hole of the putting test string of giving up, the down-hole test string of giving up is anchored on corresponding test zone position;
After the test of step 4, target zone is finished, utilize cable to be lowered to fisher and drag for Multi-layer sampling tester and trip out, can obtain laminated distributor under well fluid sample and test data;
Tester in step 5, the change sampling tester repeats above-mentioned steps two to step 4, obtains and the corresponding test data of tester;
Step 6, utilize cable to be lowered to fisher to drag for give up test string and tripping out of down-hole, change target zone, repeating step one is finished the sampling and the test of another target zone to step 5.
In the said method, the sampling tester that will have tester is earlier put into the down-hole test string of giving up, and carries the down-hole test string of giving up with cable again and is lowered to the test purpose layer.
Another object of the present invention provides the special equipment Stratified Sampling testing arrangement that is used for said method, it is made up of give up test string and a sampling tester of a down-hole, sampling tester has a tester, place in the middle of this test string of giving up, and can in test string is given up in the down-hole, be lowered to or take out.
In the above-mentioned Stratified Sampling testing arrangement, described down-hole releasing device is made up of the down-hole back-off sub that is fixedly connected sequentially, sealing device, bridge-type test job tube and anchoring device; Its inside of described bridge-type test job tube has a test channel and two passageway bridges, and described test channel side direction and combination of zones form two inlet openings, and described passageway bridge is located in the metalwork wall, is that the center line symmetry is offered with described test channel.
In the above-mentioned Stratified Sampling testing arrangement, upwards gradually big trumpet end is established in the back-off sub of described down-hole topmost, and endoporus is provided with the undergauge positioning step; Described anchoring device outside is provided with the slips of several expansibles or gathering, and described sealing device is a compressible formula hollow rubber seal.
In the above-mentioned Stratified Sampling testing arrangement, described sampling tester is made up of fishing head, sampling cavity, ball seat, lower contact, testing seal section and the tester of screwed connection successively; Described sampling cavity, ball seat, lower contact, testing seal section epimere inner chamber are communicated with; The testing seal section outer wall is established two O-ring seals up and down, testing seal section is offered inlet opening at last O-ring seal lower position, inlet opening is communicated with testing seal section epimere inner chamber, and pressure transmission hole is offered in the position on testing seal section lower seal cushion rubber, and pressure transmission hole is communicated with testing seal section hypomere inner chamber; Testing seal section hypomere inner chamber and described tester interlock.
In the above-mentioned Stratified Sampling testing arrangement, described fishing head vertically is provided with two inlet openings that are communicated with sampling cavity; Described sampling cavity is the metalwork of a hollow, is provided with a plunger in the sampling cavity, and plunger is connected with the sampling cavity inwall is closely knit.
In the above-mentioned Stratified Sampling testing arrangement, described ball seat bottom is provided with through hole, and through hole upwards is provided with ball valve and float successively, and this ball valve and float extend in the sampling cavity; Described lower contact has inner chamber, establishes back-moving spring in the chamber, and spring one end connects ball valve, and the other end is fixed on the bottom of lower contact; The lower contact bottom is provided with two through holes.
Adopt the inventive method, utilize cable to realize that the down-hole gives up or salvage, without operation, maneuverability, testing cost are low, the efficient height; Utilize the passageway bridge in the bridge-type seating nipple, for following one deck position provides the production fluid passage, during test, interlayer does not disturb independently of one another, mutually, can obtain the dynamic data under the oil-water well ordinary production state, realizes the purpose of Stratified Sampling test; Seating nipple provides carrier for the downhole testing instrument, can realize the test of 3-5 parameter, and instrument removes without operation, realizes cable or wire Launching and Bailing; Sealing device in the testing arrangement is suppressed without cementing truck by downhole hardware deadweight seat envelope and release, without underground work, can save testing cost.
Description of drawings
Fig. 1 is the structure and the sampling and testing principle schematic of specific hierarchical sampling and testing device of the present invention;
Fig. 2 is the test string structural representation of giving up of down-hole among Fig. 1;
Fig. 3 is a sampling tester structural representation among Fig. 1.
Fig. 4 is the flow chart of Stratified Sampling method of testing of the present invention.
The specific embodiment
The present invention at first provides a kind of laminated distributor under well sampling and method of testing that can be used for bailing well, rod-pumped well, screw bolt well, electric pump well, well, prospect pit and pilot production well, cooperate this method, the invention provides a cover Stratified Sampling testing arrangement, this device by the down-hole give up test string with can work the sampling tester of putting therein and form.Workflow of the present invention is: step 1, carry the down-hole with cable and give up after test string is lowered to the test purpose layer, on put and put tubing string, the down-hole test string of giving up is anchored on corresponding test zone position; Step 2, carry and to have in the test string of giving up under the sampling tester lower going-into-well of tester with cable or steel wire; Step 3, start and to carry oily equipment and make the oil well operate as normal, the down-hole places the sampling tester of the test string of giving up to finish the dynamic test and the high pressure physical property sample of this interval; After the test of step 4, target zone is finished, utilize cable to be lowered to fisher and drag for Multi-layer sampling tester and trip out, can obtain laminated distributor under well fluid sample and test data; Tester in step 5, the change sampling tester repeats above-mentioned steps two to step 4, obtains and the corresponding test data of tester; Step 6, utilize cable to be lowered to fisher to drag for give up test string and tripping out of down-hole, change target zone, repeating step one is finished the sampling and the test of another target zone to step 5.
In the said method, the structure of Stratified Sampling testing arrangement is referring to Fig. 1, is made up of give up test string A and sampling tester B of a down-hole, and sampling tester B places in the middle of this test string A that gives up, and can be lowered to or take out in the test string A that gives up.
Referring to Fig. 2, the down-hole test string A that gives up mainly is made up of down-hole back-off sub A1, sealing device A2, bridge-type test job tube A3, anchoring device A4, wherein back-off sub A1, sealing device A2, bridge-type test job tube A3 and anchoring device A4 are fixedly connected sequentially, and sealing device A2 and seating nipple A3 and anchoring device A4 are by screwed connection.Sealing device A2 is a compression hollow rubber seal, makes expansion of sealing device lateral or contraction by transferring or go up portable cable (steel wire).The major function of sealing device A2 is the corresponding test zone of sealing, and this device is suppressed release without cementing truck, discharges by this device gravity to set, to reach the purpose of sealing test target zone.Bridge-type test job tube A3 is the metalwork of a hollow, and its inner transverse has a test channel A6 and two passageway bridge A5, and wherein test channel A6 side direction and combination of zones form two inlet openings, corresponding test purpose interval; Passageway bridge A5 opens on the metalwork wall, is that the center line symmetry is offered with test channel A6, and not with combination of zones, passageway bridge A5 can be next interval the production fluid passage is provided, and during test, can guarantee that each layer of down-hole is relatively independent, is independent of each other.Back-off sub A1 in down-hole is a hollow metal pipe, establishes upwards gradually big trumpet end A11 topmost, and the A1 endoporus is provided with a undergauge step near trumpet end, and this step is used for salvaging or delivery down-hole releasing device A; Anchoring device A4 is a column hollow metal thing, and the outside is provided with the slips A41 of 6 expansibles or gathering.The major function of A4 is that releasing device is suspended on the internal surface of sleeve pipe of test purpose interval, and the slips A41 that can utilize cable or steel wire trumpet end A11 and the anchoring device A4 by down-hole back-off sub A1 to establish realizes that the down-hole of releasing device gives up and grappling.
Referring to Fig. 3, laminated distributor under well sampling tester B1 mainly is made up of fishing head B1, sampling cavity B2, ball seat B3, lower contact B4, testing seal section B8, tester B6, and these parts all are metalworks, adopt screwed connection successively.Wherein, fishing head B1 vertically is provided with two inlet opening B14 that are communicated with sampling cavity B2, is used for discharging the liquid in the sampling cavity B2; Sampling cavity B2 is the metalwork of a hollow, is used for storing the down-hole oil sample, is provided with a plunger B13 among the sampling cavity B2, plunger B13 and closely knit connection of sampling cavity B2 inwall; Ball seat B3 bottom is provided with through hole B16, and through hole B16 upwards is provided with ball valve B11 and float B12 successively, and this ball valve B11 and float B12 extend in the sampling cavity B2; Lower contact B4 has inner chamber, establishes back-moving spring B10 in the chamber, and spring B 10 1 ends connect ball valve B11, and the other end is fixed on the bottom of lower contact B4, and lower contact B4 bottom is provided with two through hole B15; Testing seal section B8 is the metal cylinder that has inner chamber, be divided into the two sections that inner chamber is not connected, the epimere drum outer wall is established O-ring seal B5, other establishes the inlet opening B9 that is communicated with inner chamber, the epimere inner chamber is by the intracavity inter-connection of through hole B15 and lower contact B4, the hypomere drum outer wall is established O-ring seal B5, other establishes the pressure transmission hole B7 that is communicated with inner chamber, the direct linked pressure meter of hypomere inner chamber, set O-ring seal B5 is a rubber parts, with bridge-type test job tube A3 closely knit connection of inwall of down-hole releasing device A, be used for separating the corresponding test zone of test channel by two O-ring seal B5; Tester B6 is a memory-type downhole testing instrument, can test needs according to difference and change, and when recording the stratified flow pressure of corresponding interval and static pressure as need, this tester B6 can be the memory-type pressure meter.
In conjunction with special equipment Stratified Sampling testing arrangement of the present invention, method of the present invention realizes like this:
Step 1 is carried the down-hole with cable and is given up after test string is lowered to the test purpose layer, on put and put tubing string, on the one hand, the slips A41 of anchoring device A4 in this testing arrangement test string of will giving up is anchored on corresponding test zone position, on the other hand, A2 lateral spread of compression hollow rubber sealing device or contraction by downhole hardware deadweight seat envelope and release, seal corresponding test zone.
Oily equipment is carried in the step 3 startup makes the oil well operate as normal, this moment, strata pressure was greater than the down-hole head of liquid, the ball valve B11 of Stratified Sampling device B is opened, down-hole output liquid enters sampling cavity B2, and the distilled water on the sampling cavity B2 plunger B13 replaced out from fluid hole B14, sampling tester B build-in test instrument B6 this moment (as pressure gauge) can record the test data of this interval.After producing a period of time, the down-hole liquid level raises, producing pressure differential reduces, down-hole ball valve B11 closes sampling tester B by the spring B 10 pulling ball valve B11 that its lower end connects, at this moment, being enclosed in the interior fluid of sampling cavity B2 becomes the fluid sample of this interval, and tester B6 can write down the test parameter of this interval.
After step 4 test finishes, after being lowered to fisher and tripping out laminated distributor under well sampling tester B, can obtain the laminated distributor under well fluid sample and obtain test data from sampling cavity B2 from tester B6 by fishing head B1.
Step 5, obtain other test parameters of this interval as need, then change the kind of tester B6, as pressure gauge, thermometer, flow meter, water detector, densometer etc., repeating step one is to step 4, obtain the test data such as dynamic and static pressure, temperature, flow of test purpose layer respectively, can enroll 30 surplus kind of test data.
Step 6 when changing the test purpose interval, is utilized cable to be lowered to fisher and is dragged for give up test string A and tripping out of down-hole, then it is reentered into another target zone, and repeating step one is finished the sampling and the test of another target zone to step 5.At this moment, layering is given up, and design has bridge-type seating nipple A3 among the test string A, and design has passageway bridge A5 in the seating nipple A3, passageway bridge A5 provides the production fluid passage for following one deck position, during test, interlayer independently of one another, do not disturb mutually can not record the dynamic data of different intervals under the oil-water well ordinary production state.
This testing arrangement is tested at Daqing oil field N2-20-468 well, according to geol's designing requirement, divides 2 intervals to test in the N2-20-468 well, and test process is as follows:
1, at first tests first interval.Testing arrangement is utilized under the cable lower going-into-well behind the test purpose layer (first floor), on put payout with this test zone of testing arrangement grappling, downhole packer tube post gravity discharges and the corresponding test zone of packing.
2, testing arrangement is lost the down-hole after, dropping feeder is proposed, start the oil well ordinary production.
3, utilize dropping feeder that pressure, sampling tester are lost into the downhole testing seating nipple, oil well ordinary production 2 days.Down-hole pressure, sampling tester record the stream of this interval and press data (as shown in table 1) and fluid sample.After the down-hole is closed also, record the layering static pressure data (as shown in table 1) of this interval.
4, trip out Multi-layer sampling tester and then this layer is carried out flow rate test, flow meter is lost by steel wire in the test job tube of down-hole string, flow meter can record corresponding interval zonal flow rate (as shown in table 1).Test finishes and is lowered to fisher, trips out downhole flowmeter.
5, be lowered to the salvaging dropping feeder, after pulling the downhole testing device out, by on put payout with downhole testing device deblocking, behind test purpose layer (second layer) under this testing arrangement lower going-into-well, on put payout testing arrangement be anchored on this test zone, downhole packer tube post gravity discharges and the corresponding test zone of packing.
6, repeat 2,3,4 steps, measured data is as shown in table 1.Test finishes, and is lowered to fisher, trips out the downhole testing device.
Table 1
| Parameter | Static pressure (Mpa) | Dynamic pressure (Mpa) | Temperature (℃) | Flow (M 3/d) |
| First interval | 11.65 | 5.2 | 85 | 30 |
| Second interval | 13.28 | 5.8 | 85.5 | 42 |
Claims (9)
1, a kind of method of Stratified Sampling test may further comprise the steps:
Step 1, carry the down-hole with cable and give up after test string is lowered to the test purpose layer, on put the down-hole of the putting test string of giving up, the down-hole test string of giving up is anchored on corresponding test zone position;
Step 2, carry and to have in the test string of giving up under the sampling tester lower going-into-well of tester with cable or steel wire;
Step 3, start and to carry oily equipment and make the oil well operate as normal, the down-hole places the sampling tester of the test string of giving up to finish the dynamic test and the high pressure physical property sample of this interval;
After the test of step 4, target zone is finished, utilize cable to be lowered to fisher and drag for Multi-layer sampling tester and trip out, can obtain laminated distributor under well fluid sample and test data;
Tester in step 5, the change sampling tester repeats above-mentioned steps two to step 4, obtains and the corresponding test data of tester;
Step 6, utilize cable to be lowered to fisher to drag for give up test string and tripping out of down-hole, change target zone, repeating step one is finished the sampling and the test of another target zone to step 5.
2, the method for Stratified Sampling according to claim 1 test is characterized in that, the sampling tester that will have tester is earlier put into the down-hole test string of giving up, and carries the down-hole test string of giving up with cable again and is lowered to the test purpose layer.
3, the Stratified Sampling testing arrangement in claim 1 or the 2 described Stratified Sampling method of testings, it is characterized in that, it is made up of give up test string and a sampling tester of a down-hole, sampling tester has a tester, place in the middle of this test string of giving up, and can in test string is given up in the down-hole, be lowered to or take out.
4, Stratified Sampling testing arrangement according to claim 3 is characterized in that, described down-hole releasing device is made up of the down-hole back-off sub that is fixedly connected sequentially, sealing device, bridge-type test job tube and anchoring device; Its inside of described bridge-type test job tube has a test channel and two passageway bridges, and described test channel side direction and combination of zones form two inlet openings, and described passageway bridge is located in the metalwork wall, is that the center line symmetry is offered with described test channel.
According to claim 3 or 4 described oil-water well bridge-type Stratified Sampling testing arrangements, it is characterized in that 5, upwards gradually big trumpet end is established in the back-off sub of described down-hole topmost, endoporus is provided with the undergauge positioning step; Described anchoring device outside is provided with the slips of several expansibles or gathering, and described sealing device is a compressible formula hollow rubber seal.
6, according to claim 3 or 4 described oil-water well bridge-type Stratified Sampling testing arrangements, it is characterized in that described sampling tester is made up of fishing head, sampling cavity, ball seat, lower contact, testing seal section and the tester of screwed connection successively; Described sampling cavity, ball seat, lower contact, testing seal section epimere inner chamber are communicated with; The testing seal section outer wall is established two O-ring seals up and down, testing seal section is offered inlet opening at last O-ring seal lower position, inlet opening is communicated with testing seal section epimere inner chamber, and pressure transmission hole is offered in the position on testing seal section lower seal cushion rubber, and pressure transmission hole is communicated with testing seal section hypomere inner chamber; Testing seal section hypomere inner chamber and described tester interlock.
According to the described oil-water well bridge-type of claim 6 Stratified Sampling testing arrangement, it is characterized in that 7, described fishing head vertically is provided with two inlet openings that are communicated with sampling cavity; Described sampling cavity is the metalwork of a hollow, is provided with a plunger in the sampling cavity, and plunger is connected with the sampling cavity inwall is closely knit.
According to the described oil-water well bridge-type of claim 6 Stratified Sampling testing arrangement, it is characterized in that 8, described ball seat bottom is provided with through hole, through hole upwards is provided with ball valve and float successively, and this ball valve and float extend in the sampling cavity; Described lower contact has inner chamber, establishes back-moving spring in the chamber, and spring one end connects ball valve, and the other end is fixed on the bottom of lower contact; The lower contact bottom is provided with two through holes.
9, according to the described oil-water well bridge-type of claim 3 Stratified Sampling testing arrangement, it is characterized in that,
Described down-hole releasing device is made up of the down-hole back-off sub that is fixedly connected sequentially, sealing device, bridge-type test job tube and anchoring device; Its inside of described bridge-type test job tube has a test channel and two passageway bridges, and described test channel side direction and combination of zones form two inlet openings, and described passageway bridge is located in the metalwork wall, is that the center line symmetry is offered with described test channel; Upwards gradually big trumpet end is established in the back-off sub of described down-hole topmost, and endoporus is provided with the undergauge positioning step; Described anchoring device outside is provided with the slips of several expansibles or gathering; Described sealing device is a compressible formula hollow rubber seal;
Described sampling tester is made up of fishing head, sampling cavity, ball seat, lower contact, testing seal section and the tester of screwed connection successively; Described sampling cavity, ball seat, lower contact, testing seal section epimere inner chamber are communicated with; The testing seal section outer wall is established two O-ring seals up and down, testing seal section is offered inlet opening at last O-ring seal lower position, inlet opening is communicated with testing seal section epimere inner chamber, and pressure transmission hole is offered in the position on testing seal section lower seal cushion rubber, and pressure transmission hole is communicated with testing seal section hypomere inner chamber; Testing seal section hypomere inner chamber and described tester interlock; Described fishing head vertically is provided with two inlet openings that are communicated with sampling cavity; Described sampling cavity is the metalwork of a hollow, is provided with a plunger in the sampling cavity, and plunger is connected with the sampling cavity inwall is closely knit; Described ball seat bottom is provided with through hole, and through hole upwards is provided with ball valve and float successively, and this ball valve and float extend in the sampling cavity; Described lower contact has inner chamber, establishes back-moving spring in the chamber, and spring one end connects ball valve, and the other end is fixed on the bottom of lower contact, and the lower contact bottom is provided with two through holes.
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