CN110566198A - Multi-well shared online water content metering method - Google Patents
Multi-well shared online water content metering method Download PDFInfo
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- CN110566198A CN110566198A CN201910877689.9A CN201910877689A CN110566198A CN 110566198 A CN110566198 A CN 110566198A CN 201910877689 A CN201910877689 A CN 201910877689A CN 110566198 A CN110566198 A CN 110566198A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 181
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 239000003129 oil well Substances 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 238000012546 transfer Methods 0.000 claims abstract description 20
- 239000007791 liquid phase Substances 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 21
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 9
- 239000012071 phase Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 239000010779 crude oil Substances 0.000 claims description 4
- 238000001802 infusion Methods 0.000 claims description 4
- 238000000691 measurement method Methods 0.000 claims 3
- 238000005070 sampling Methods 0.000 abstract description 6
- 238000004458 analytical method Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
Abstract
The invention relates to the technical field of oil well oil production analysis, in particular to a multi-well shared online water content metering method, which comprises the following steps: selecting a well to be measured, and calculating the liquid phase volume of a medium in a measuring pipeline and a water-containing instrument corresponding to the well; leading the well into a metering pipeline by a well selection multi-way valve, and calculating interception delay of a water sample in the well by a meter; intercepting the water-containing sample by the water content instrument according to the interception delay of the water-containing sample and the interception duration of the water-containing sample; the daily liquid yield of the well is calculated by a meter, and the water content meter calculates the water content according to the intercepted water-containing sample; the transfer station calculates the daily oil production of the well. The invention completely replaces manual sampling, manual testing and manual data filling, realizes full-automatic yield metering, automatic data transmission and automatic production report generation of the oil well, realizes the synchronism of yield metering and water content measurement, ensures the accuracy of metering data, realizes highly intensive production management, saves a large amount of equipment facilities and investment, and meets the requirement of full coverage of oil well production and physical association.
Description
Technical Field
The invention relates to the technical field of oil well oil production analysis, in particular to a multi-well shared online water content metering method.
Background
In the production process of a traditional oil field, the multi-way valve for automatically selecting the wells can realize multi-well common measurement, the liquid production amount of the oil well is converted by measuring the yield of the produced substances of the oil well within a period of time, and the oil production amount of the oil well is calculated by utilizing a mode of manually sampling and measuring water content at regular intervals. This mode causes that oil well output thing measurement time is inconsistent with artifical sample time, and non-the same fluid medium when liquid production volume is measured promptly and is measured with the moisture, causes the unable real-time accurate oil production volume of measuring oil well. Although this problem can be solved in a single-to-single manner by adding a water content meter to each well, it is economically unfeasible to add a large amount of equipment and investment on site.
Disclosure of Invention
The invention provides a multi-well shared online water content metering method, overcomes the defects of the prior art, and can effectively solve the problem that the oil yield of an oil well cannot be accurately metered in real time due to the fact that the metering time of oil well output is inconsistent with the manual sampling time in the conventional method for metering the liquid yield by utilizing a device and manually and periodically sampling and measuring the water content.
The technical scheme of the invention is realized by the following measures: a multi-well shared online water content metering method comprises a multi-well shared online water content metering device and a multi-well shared online water content metering method, wherein the multi-well shared online water content metering device comprises a transfer station, a well selection multi-way valve, a water content instrument and a meter, the well selection multi-way valve is communicated with the meter through a metering pipeline and an oil collecting pipeline, the water content instrument is communicated with the metering pipeline in front of the meter through a liquid inlet pipeline, and the multi-well shared online water content metering method comprises the following steps:
selecting a well to be measured, and calculating the liquid phase volume of a medium in a measuring pipeline and a water-containing instrument corresponding to the well;
Leading the well into a metering pipeline by a well selection multi-way valve, calculating interception delay of a water sample contained in the well by a meter, and sending the interception delay to a water content instrument;
the water content meter calculates the intercepting time of the water-containing sample, and intercepts the water-containing sample according to the intercepting time delay of the water-containing sample and the intercepting time of the water-containing sample;
the daily liquid yield of the well is calculated by a meter, and the water content meter calculates the water content according to the intercepted water-containing sample;
The meter and the water content meter respectively send the daily oil yield and the water content to the transfer station, and the transfer station calculates the daily oil yield of the well.
the following is further optimization or/and improvement of the technical scheme of the invention:
The process of selecting the well to be measured and calculating the liquid phase volume of the medium in the measuring pipeline and the water-containing instrument corresponding to the well comprises the following steps:
determining a well needing to be metered;
Calculating the total volume V of the metering pipeline and the water content instrument corresponding to the well according to the following formula;
V＝m×L+Vc
Wherein, L is the total length of the pipeline and comprises a metering pipeline and a liquid inlet pipeline of a water content instrument; vcThe effective volume of the water content instrument is m is the displacement volume of each meter of the pipeline;
Calculating the liquid volume of the medium in the metering pipeline and the water content instrument corresponding to the well, wherein the liquid volume of the medium stored in the metering pipeline and the water content instrument corresponding to the current well is the liquid volume of the product in the previous well stored in the metering pipeline and the water content instrument because the medium stored in the current well is the product of the previous well, and the calculation formula is as follows:
Wherein V is the total volume of the metering pipeline and the water content instrument corresponding to the well; l is the total length of the pipeline and comprises a metering pipeline and a liquid inlet pipeline of a water content instrument; vcIs the effective volume of the water content instrument; r is the volume ratio of gas phase and liquid phase of the oil well product of the well region, and m is the displacement volume per meter of the pipeline.
The process of calculating the interception delay of the water sample in the well by the meter comprises the following steps:
The meter measures the transfusion speed q of the welln；
the meter calculates the interception delay of the water sample in the well according to the following formula, and the interception delay of the water sample in the well is the time required by the well to replace the previous well product stored in the metering pipeline and the water content instrument;
wherein, Vn-1is the liquid phase volume of the medium in the metering pipeline and the water content instrument corresponding to the well; l is the total length of the pipeline and comprises a metering pipeline and a liquid inlet pipeline of a water content instrument; vcIs the effective volume of the water content instrument; r is the volume ratio of gas phase and liquid phase of the oil well product of the well region, and m is the displacement volume per meter of the pipeline.
The water content meter calculates the interception duration T of the water-containing sample through the following formula1；
Wherein, Vcis the effective volume of the water content instrument; q. q.snThe infusion rate of the well.
The transfer station calculates the daily oil production of the well according to the following formula;
Qno＝ρo×(1-ωn)×Qn
where ρ is0the density of the crude oil in the well area is shown; omeganthe water content of the produced liquid of the well; qnthe daily fluid production of the well.
the invention completely replaces manual sampling, manual testing and data manual filling, the oil well output is conveyed to the transfer station through the well selection multi-way valve pipe, wherein the oil well which needs to be measured in the liquid yield is automatically selected by using the well selection multi-way valve, the output of the well is independently guided into the measuring pipeline for measuring, the water content instrument, the measuring instrument and the transfer station automatically complete the interception of the water content sample, the calculation of the daily liquid yield of the selected oil well, the calculation of the water content, the calculation of the daily oil yield and the generation of the production report, thereby realizing the full-automatic measurement of the yield, the automatic transmission of the data and the automatic generation of the production report of the oil well, realizing the synchronization of the yield measurement and the water content measurement, ensuring the accuracy of the measuring data, realizing highly intensive production management, saving a large amount of equipment facilities and investment, and meeting the requirement of the full coverage of the oil well production.
drawings
FIG. 1 is a schematic structural diagram of a multi-well shared online water content metering device in embodiment 1 of the invention.
FIG. 2 is a process flow diagram of example 1 of the present invention.
FIG. 3 is a flow chart of a method for calculating the volume of the liquid phase of the medium in the metering line and the water-containing instrument in example 1 of the present invention.
FIG. 4 is a flowchart of a method for calculating the interception delay of a water sample by using a meter according to embodiment 1 of the present invention.
FIG. 5 is a schematic diagram of the structure of a multi-well shared on-line water cut measuring device in the embodiment 2 of the present invention.
The codes in the figures are respectively: 1 is a well selection multi-way valve, 2 is a water content meter, 3 is a meter, 4 is an oil collecting pipeline, 5 is a metering pipeline, and F1 to F9 are valves.
Detailed Description
the present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
in the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
Example 1: as shown in attached figures 1 and 2, the on-line water content measuring method shared by multiple wells comprises a multi-well shared on-line water content measuring device and a multi-well shared on-line water content measuring method, wherein the multi-well shared on-line water content measuring device comprises a transfer station, a well selection multi-way valve 1, a water content meter 2 and a meter 3, the well selection multi-way valve 1 is communicated with the meter 3 through a measuring pipeline 5 and a collecting pipeline 4, the water content meter 2 is communicated with the measuring pipeline 5 in front of the meter 3 through a liquid inlet pipeline, and the multi-well shared on-line water content measuring method comprises the following steps:
S1, selecting a well to be measured, and calculating the liquid phase volume of the medium in the measuring pipeline 5 and the water-containing instrument 2 corresponding to the well;
S2, leading the well into a metering pipeline 5 by the well selection multi-way valve 1, calculating interception delay of a water sample in the well by the meter 3, and sending the interception delay to the water content instrument 2;
S3, the water content instrument 2 calculates the intercepting time of the water-containing sample, and intercepts the water-containing sample according to the intercepting time delay of the water-containing sample and the intercepting time of the water-containing sample;
S4, calculating the daily liquid yield of the well by the meter 3, and calculating the water content by the water content instrument 2 according to the intercepted water-containing sample;
S5, the meter 3 and the water content meter 2 respectively send the daily oil yield and the water content to the transfer station, and the transfer station calculates the daily oil yield of the well.
The multi-well shared online water content metering device is the prior known technology, and can be 2 manifolds, 24 wells shared online water content metering devices or 4 manifolds, 48 wells shared online water content metering devices; 2 manifold 24 wells share 2 well selection multi-way valves 1 in the online water content metering device, 4 manifold 48 wells share 4 well selection multi-way valves 1 in the online water content metering device, and each well selection multi-way valve 1 is reserved with 2 empty heads for standby; the switching station in the multi-well shared online water cut metering device can be respectively communicated with the well selection multi-way valve 1, the water cut instrument 2 and the meter 3, and the water cut instrument 2 and the meter 3 can be communicated with each other.
when the moisture meter 2 calculates the moisture content from the cut water-containing sample, the cut water-containing sample is heated, kept warm, left to stand, and scanned to measure the moisture content in the liquid phase volume.
the transfer station comprises a PLC and an upper computer, and can calculate the daily oil yield of the well according to the daily liquid yield and the water content calculated by the meter 3 and the water content meter 2 and generate a production report.
The invention discloses a multi-well shared online water content metering device, which enables oil well output to be converged and conveyed to a transfer station through a pipe of a well selection multi-way valve 1, wherein an oil well needing to be subjected to liquid yield metering is automatically selected by utilizing the well selection multi-way valve 1, the output of the well is independently guided into a metering pipeline 5 for metering, manual sampling is completely replaced during metering, water content sample interception, calculation of daily liquid yield of the selected oil well, calculation of water content, calculation of daily oil yield and generation of a production report are automatically completed by a water content instrument 2, a meter 3 and the transfer station, so that the synchronism of yield metering and water content measurement is realized, and the accuracy of metering data is ensured.
The method for measuring the water content of the multi-well shared online system can be further optimized or/and improved according to actual needs:
as shown in fig. 1, 2 and 3, the process of selecting a well to be measured and calculating the liquid phase volume of the medium in the measuring pipeline 5 and the water content instrument 2 corresponding to the well comprises the following steps:
S11, determining the well needing to be measured;
S12, calculating the total volume V of the metering pipeline 5 and the water content instrument 2 corresponding to the well through the following formula;
V＝m×L+Vc
Wherein, L is the total length of the pipeline and comprises a metering pipeline 5 and a liquid inlet pipeline of a water content instrument 2; vcIs the effective volume of the water content instrument 2, and m is the displacement volume of each meter of the pipeline;
s13, calculating the liquid volume of the medium in the measuring pipeline 5 and the water content instrument 2 corresponding to the well, and since the existing medium in the current well is the product of the previous well, the liquid volume of the medium existing in the measuring pipeline 5 and the water content instrument 2 corresponding to the current well is the liquid volume of the product in the previous well existing in the measuring pipeline 5 and the water content instrument 2, the calculation formula is as follows:
Wherein V is the total volume of the metering pipeline 5 and the water content instrument 2 corresponding to the well; l is the total length of the pipeline, comprising a metering pipeline 5 and a liquid inlet pipeline of a water content instrument 2; vcis the effective volume of the water content instrument 2; r is the volume ratio of gas phase and liquid phase of the oil well product of the well region, and m is the displacement volume per meter of the pipeline.
The L is the total length of the pipeline, and because the online moisture metering device shared by multiple wells comprises a far-end manifold and a near-end manifold, the lengths of the metering pipelines 5 are different, if the well needing to be metered is positioned at the far-end manifold, the L is the sum of the far-end metering pipeline and the liquid inlet pipeline of the moisture meter 2, and if the well needing to be metered is positioned at the near-end manifold, the L is the sum of the near-end metering pipeline and the liquid inlet pipeline of the moisture meter 2. The volume m of the pipelines per meter is calculated according to the actual conditions, for example, in general, when the specifications of the metering pipeline 5 and the liquid inlet pipeline of the water content instrument 2 are both 76mm in outer diameter and 5mm in wall thickness, the volume m of the pipelines per meter is 0.003419m3。
As shown in fig. 1, 2 and 4, the process of calculating the water sample interception delay of the well by the meter 3 comprises the following steps:
S21, metering device 3 meters the transfusion speed q of the welln；
S22, the meter 3 calculates the interception delay of the water sample in the well according to the following formula, and the interception delay of the water sample in the well is the time required by the displacement of the metering pipeline 5 and the previous well output stored in the water content instrument 2;
wherein, Vn-1Is the liquid phase volume of the medium in the metering line 5 and the water content meter 2 corresponding to the well; l is the total length of the pipeline, comprising a metering pipeline 5 and a liquid inlet pipeline of a water content instrument 2; vcIs the effective volume of the water content instrument 2; r is the volume ratio of gas phase and liquid phase of the oil well product of the well region, m is the displacement volume per meter of pipeline。
as shown in the attached figures 1 and 2, the water content instrument 2 calculates the water sample interception time length T by the following formula1；
wherein, Vcis the effective volume of the water content instrument 2; q. q.snThe infusion rate of the well.
As shown in fig. 1 and 2, the transfer station calculates the daily oil production of the well by the following formula;
Qno＝ρo×(1-ωn)×Qn
Where ρ is0the density of the crude oil in the well area is shown; omeganThe water content of the produced liquid of the well; qnThe daily fluid production of the well.
Example 2: as shown in figures 2 and 5, the existing 2 manifolds and the multiple wells of 24 wells share the online water content metering device, and the crude oil density rho in the produced fluid of the well zoneo＝0.9t/m3Water density ρw＝1.0t/m3The gas-liquid ratio is 2, and the length L of the metering line of the manifold of the remote well selection multi-way valve 1a200m, the length L of a metering line of a manifold of the multi-way valve 1 for selecting a well at the near endb50m, length L of liquid inlet pipeline of water content instrument 2cthe effective volume of the water content instrument 2 is 0.012m under the condition of 10m3The metering process is as follows:
1. selecting a well 2 needing to be measured, and calculating to obtain that the total volume V of a measuring pipeline 5 and a water content instrument 2 corresponding to the well 2 is 0.90m3and calculating to obtain the liquid phase volume V of the medium in the metering pipeline 5 and the water content instrument 2n-1is 0.3m3；
2. The well selection multi-way valve 1 automatically selects a well 2 to be led into the metering pipeline 5, and the valve F2 and the valve F4 are in an open state. Simultaneously starting the meter 3, opening the valve F5, closing the valve F6 and the valve F7, and measuring the transfusion speed of the produced liquid in the well in the measuring pipeline 5, wherein the measured transfusion speed is assumed to be 0.5m3Calculating to obtain the interception delay of the water sample in the well 2 to be 0.6 h;
3. The meter 3 sends a command of 'starting to intercept samples after 0.6h delay' to the water content instrument 2, the water content instrument 2 calculates the interception duration of the water-containing sample according to the infusion speed in the metering pipeline 5, after 0.6h delay, the valve F6 and the valve F7 are automatically opened, the valve F5 is automatically closed, the water content instrument 2 starts to intercept the water-containing sample of the output of the well 2, after interception is finished, the valve F6 and the valve F7 are automatically closed, and the valve F5 is automatically opened;
4. The water content meter 2 sends a command "start of measurement of the amount of liquid produced in the well 2" to the meter 3, and the meter 3 starts the measurement of the amount of liquid produced, assuming that the measured amount of liquid produced is 12m3D, synchronously heating, preserving heat, standing, layering and scanning the intercepted water-containing sample by the water content instrument 2 to measure the water content, and supposing that the measured water content is 80%;
5. And automatically transmitting the data of the water content and the liquid yield to a transfer station, automatically calculating the daily oil yield of the well 2 by the transfer station to be 2.16t/d, automatically generating a production report form by all related data of the well until the metering work of the well 2 is finished, simultaneously sending an instruction of finishing the metering of the well 2 and starting the metering of the well 3 by an automatic control system of the transfer station, and automatically selecting the well through a well selection multi-way valve 1 to start the metering work of the next well.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (5)
1. The utility model provides a online measurement method of moisture of sharing of multiple wells, includes online measurement device of moisture of sharing of multiple wells and online measurement method of moisture of sharing of multiple wells, and online measurement device of moisture of sharing of multiple wells includes switching station, selects well multi-way valve, moisture appearance and counter, selects well multi-way valve to be linked together with the counter through measurement pipeline and oil collecting pipeline, and the moisture appearance is linked together with the measurement pipeline in front of the counter through the inlet line, characterized by, online measurement method of moisture of sharing of multiple wells includes the following step:
selecting a well to be measured, and calculating the liquid phase volume of a medium in a measuring pipeline and a water-containing instrument corresponding to the well;
Leading the well into a metering pipeline by a well selection multi-way valve, calculating interception delay of a water sample contained in the well by a meter, and sending the interception delay to a water content instrument;
The water content meter calculates the intercepting time of the water-containing sample, and intercepts the water-containing sample according to the intercepting time delay of the water-containing sample and the intercepting time of the water-containing sample;
The daily liquid yield of the well is calculated by a meter, and the water content meter calculates the water content according to the intercepted water-containing sample;
the meter and the water content meter respectively send the daily oil yield and the water content to the transfer station, and the transfer station calculates the daily oil yield of the well.
2. The method for on-line water content measurement shared by multiple wells according to claim 1, wherein the step of selecting the well to be measured and calculating the liquid phase volume of the medium in the measuring pipeline and the water content instrument corresponding to the well comprises the following steps:
determining a well needing to be metered;
Calculating the total volume V of the metering pipeline and the water content instrument corresponding to the well according to the following formula;
V＝m×L+Vc
Wherein, L is the total length of the pipeline and comprises a metering pipeline and a liquid inlet pipeline of a water content instrument; vcThe effective volume of the water content instrument is m is the displacement volume of each meter of the pipeline;
Calculating the liquid volume of the medium in the metering pipeline and the water content instrument corresponding to the well, wherein the liquid volume of the medium stored in the metering pipeline and the water content instrument corresponding to the current well is the liquid volume of the product in the previous well stored in the metering pipeline and the water content instrument because the medium stored in the current well is the product of the previous well, and the calculation formula is as follows:
wherein V is the total volume of the metering pipeline and the water content instrument corresponding to the well; l is the total length of the pipeline and comprises a metering pipeline and a liquid inlet pipeline of a water content instrument; vcis the effective volume of the water content instrument; r is the volume ratio of gas phase and liquid phase of the oil well product of the well region, and m is the displacement volume per meter of the pipeline.
3. the method of claim 1, wherein the step of calculating the interception delay of the water sample in the well comprises:
the meter measures the transfusion speed q of the welln；
the meter calculates the interception delay of the water sample in the well according to the following formula, and the interception delay of the water sample in the well is the time required by the well to replace the previous well product stored in the metering pipeline and the water content instrument;
Wherein, Vn-1Is the liquid phase volume of the medium in the metering pipeline and the water content instrument corresponding to the well; l is the total length of the pipeline and comprises a metering pipeline and a liquid inlet pipeline of a water content instrument; vcIs the effective volume of the water content instrument; r is the volume ratio of gas phase and liquid phase of the oil well product of the well region, and m is the displacement volume per meter of the pipeline.
4. The method of claim 1, wherein the water content meter calculates the interception duration T of the water sample according to the following formula1；
Wherein, VcIs the effective volume of the water content instrument; q. q.snThe infusion rate of the well.
5. the method of claim 1 or 2 or 3 or 4, wherein the transfer station calculates the daily oil production of the well by the following formula;
Qno＝ρo×(1-ωn)×Qn
Where ρ is0the density of the crude oil in the well area is shown; omeganThe water content of the produced liquid of the well; qnThe daily fluid production of the well.
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| US6561041B1 (en) * | 2001-11-28 | 2003-05-13 | Conocophillips Company | Production metering and well testing system |
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Application publication date: 20191213 |