CN106368673A - Measuring method for water content and crude output of carbon dioxide flooding high water content oil reservoir producing well - Google Patents
Measuring method for water content and crude output of carbon dioxide flooding high water content oil reservoir producing well Download PDFInfo
- Publication number
- CN106368673A CN106368673A CN201610895468.0A CN201610895468A CN106368673A CN 106368673 A CN106368673 A CN 106368673A CN 201610895468 A CN201610895468 A CN 201610895468A CN 106368673 A CN106368673 A CN 106368673A
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- gas
- output
- producing well
- oil
- water content
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 17
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 66
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 claims abstract description 33
- 239000003345 natural gas Substances 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 10
- 238000004458 analytical method Methods 0.000 claims abstract description 3
- 238000012360 testing method Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 34
- 239000010779 crude oil Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 239000000470 constituent Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
- E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
- E21B49/0875—Well testing, e.g. testing for reservoir productivity or formation parameters determining specific fluid parameters
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- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geophysics (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a measuring method for the water content and the crude output of a carbon dioxide flooding high water content oil reservoir producing well, and belongs to the technical field of oil field tertiary oil recovery development. The measuring method comprises the steps that a separator and a gas flowmeter are used on site to accurately meter the liquid output and the gas output; and since natural gas in output gas is the solute natural gas of in-place crude and the solution gas-oil ratio is a definite value for a specific oil reservoir, a gas sampling device and a gas chromatograph are used for conducting site sampling analysis on the output gas to obtain the gas output of the natural gas, and the crude output and the water content are accurately calculated. According to the measuring method for the water content and the crude output of the carbon dioxide flooding high water content oil reservoir producing well, operation is easy, convenient and practicable, the result is accurate and reliable, under the condition that no analytical device needs to be added, crude output monitoring on the high water content oil reservoir subjected to carbon dioxide flooding can be achieved, and the safe production requirements are met.
Description
Technical field
The present invention relates to a kind of carbon dioxide flooding high water-cut reservoir producing well moisture content and crude output measuring method, belong to
Tertiary oil production in oil field development technique field.
Background technology
Moisture content and crude output are the important manufacturing parameters of producing well, the crude output of all producing wells of an oil reservoir
Sum constitutes oil reservoir total output, and the moisture content of an oil reservoir is also comprehensively determined by the moisture content of all single producing wells.Oil reservoir
Moisture content and crude output for crude oil collect defeated, separate, metering, surface pipeline network design be all important reference index,
Moisture content and crude output are also the index parameter weighing an oil reservoir economic benefit, therefore accurately measurement producing well moisture content and
Crude output is significant.
The method of general measure producing well moisture content and crude output is in producing well wellhead using 1l sampler barrel timing
Product fluid sample, after stratification, profit is weighed respectively, the oil now isolated also dissolved with a part of water, then with dehydration
Instrument carries out dehydration and separates to oil, from which further follows that oil mass and the water yield, calculates moisture content and oil production during sampling, and then converse
Crude oil daily output.
At present, carbon dioxide flooding technology is one of important technology that latter period of oilfield development improves recovery ratio, high water-cut reservoir
When implementing carbon dioxide drive, producing well production fluid moisture content up to more than 80%.Because crude oil is differed greatly with water viscosity, crude oil
Often it is in discrete state together with water, producing well crude oil instant productivity and water-cut variation are big, hence with normal during output
Rule method timing sampling measure production fluid moisture content and crude oil daily output error larger it is difficult to correctly evaluate carbon dioxide drive
Effect.For example, domestic certain implement carbon dioxide flooding technology improve recovery ratio producing well, same day in 3 parts of production fluids of wellhead,
After routinely measuring method separates, is dehydrated, weighs, calculated moisture content is respectively 96.1%, 92.4%, 97.5%, right
Answer crude oil daily output 8.78t, 17.12t, 5.63t.It is not difficult to find out, the 3 parts of sample measurement results taken out in the almost same time are missed
Difference is very big, illustrates that general measuring method has been unsuitable for the effect assessment of High water cut carbon dioxide flooding oil reservoir.
Content of the invention
It is an object of the invention to provide a kind of carbon dioxide flooding high water-cut reservoir producing well moisture content and crude output measurement
Method, to overcome prior art to cause greatly the inaccurate defect of carbon dioxide drive effect assessment because of measuring result error.
In order to realize object above, the technical solution adopted in the present invention is:
A kind of carbon dioxide flooding high water-cut reservoir producing well moisture content and crude output measuring method, are to utilize in-site installation
Separator and gas flowmeter, accurately measure Liquid output and gas production, because natural gas is in-place oil in output gas
Dissolved natural gas, are certain values for specific oil reservoir dissolved gas oil ratio, therefore, using gas sample sampling apparatuses and gas chromatograph
Output gas spot sampling is analyzed, draws natural gas gas production, and then can accurately calculate crude output and moisture content.Specifically
Step is as follows:
1) utilize separator and the gas flowmeter of measuring station installation, measure producing well Liquid output qlAnd gas production；
2) utilize gas sample sampling apparatuses to gather gas sample in production wellhead, using gas chromatograph, gas sample is carried out in laboratory
Compound mensuration, determines natural Gas content in output gas, determines the daily output of producing well natural gas；
3) gas-oil ratio being obtained using oil test data or in-place oil high-voltage physics data, the daily output according to natural gas is true
Determine oil production q of producing wello；
4) according to the Liquid output q of producing welllWith oil production qoRelation, determine the average moisture content f of producing wellw:
fw=(ql-qo)/ql× 100%.
Beneficial effects of the present invention:
The present invention measures Liquid output and gas production using live separator and gas flowmeter, by scene take gas sample and
Laboratory component analyses, determine natural Gas content in output gas, and then calculate daily oil production and moisture content.Easy and simple to handle easy
OK, result accurately and reliably, in the case of need not increase analytical equipment, you can realize high water-cut reservoir and implement carbon dioxide flooding
Crude output is monitored, and meets safety in production and requires.
Brief description
Fig. 1 is the schematic flow sheet of measuring method of the present invention.
Specific embodiment
Following embodiments are only described in further detail to the present invention, but do not constitute any limitation of the invention.
Embodiment 1
Carry out output taking the producing well that certain mentioned in background technology implements carbon dioxide flooding technology raising recovery ratio as a example
Liquid and product gas analysis, specifically comprise the following steps that
1) producing well Liquid output and gas production are determined using separator and gas flowmeter: from live separator and gas
Reading in effusion meter, the liquid yield of this producing well is 265m3/ d, gas yield is 7580m3/d；
2) gather gas sample according to gas sample sampling apparatuses in production wellhead, using gas chromatograph, gas sample is carried out in laboratory
Compound mensuration, determines the daily output of natural Gas content and natural gas in output gas: collect 500ml output gas sample, using gas phase
Chromatograph measures and produces constituents composition, and result see table 1；
Table 1 produces constituents composition table
As shown in Table 1, in output gas, the content percent of natural gas is 13.40%, the having a daily output of of natural gas: gas day
Content percent=7580 × the 13.40%=1015.72m of yield × natural gas3/d；
3) oil reservoir gas-oil ratio 75.58m being obtained using oil test data or in-place oil high-voltage physics data3/ t, according to sky
So daily output of gas, determines the oil production of producing well: calculating producing well crude output is 1015.72 ÷ 75.58=13.44t/d,
And the crude oil average product that conventional method obtains is (8.78+17.12+5.63)/3=10.51t/d it is seen that two methods draw
Result difference larger；
4) determine the average moisture content of producing well according to producing well Liquid output and oil production: according to Liquid output 265m3/ d counts
Calculate moisture content: fw=(ql-qo)/ql× 100%=(265-13.44) ÷ 265 × 100%=94.93%, and conventional method obtains
The crude oil average moisture content arriving is (96.1%+92.4%+97.5%)/3=95.33%, and the result that two methods draw has difference
Not.
The measuring method of the present invention and result have obtained field study personnel and the accreditation at oil-water metering station, using routine side
Method measures producing well moisture content and the big problem of crude output error is resolved.
Embodiment 2
Carry out production fluid taking certain producing well as a example and produce gas analysis, specifically comprise the following steps that
1) producing well Liquid output and gas production are determined using separator and gas flowmeter: from live separator and gas
Reading in effusion meter, the liquid yield of this producing well is 54.9m3/ d, gas yield is 1246m3/d；
2) gather gas sample according to gas sample sampling apparatuses in production wellhead, using gas chromatograph, gas sample is carried out in laboratory
Compound mensuration, determines the daily output of natural Gas content and natural gas in output gas: collect 500ml output gas sample, using gas phase
Chromatograph measures and produces constituents composition, and result see table 2；
Table 2 produces constituents composition table
As shown in Table 2, in output gas, the content percent of natural gas is 22.84%, the having a daily output of of natural gas: gas day
Content percent=1246 × the 22.84%=284.6m of yield × natural gas3/d；
3) oil reservoir gas-oil ratio 75.58m being obtained using oil test data or in-place oil high-voltage physics data3/ t, according to sky
So daily output of gas, determines the oil production of producing well: calculating producing well crude output is 284.6 ÷ 75.58=3.77t/d, and
The crude output that conventional method records is 2.61t/d, 0.89t/d, 2.19t/d, and crude oil average product is 1.90t/d it is seen that two
The result difference that the method for kind draws is larger；
4) determine the average moisture content of producing well according to producing well Liquid output and oil production: according to Liquid output 265m3/ d counts
Calculate moisture content: fw=(ql-qo)/ql× 100%=(54.9-3.77) ÷ 54.9 × 100%=93.13%, and conventional method obtains
The crude oil water content arriving is 94.4%, 98.1%, 95.3%, and average moisture content is 95.93%, and the result that two methods draw is poor
Not larger.
For verifying the accuracy of measuring method of the present invention further, metrological personnel has specially carried out 24 hours individual wells to this well
Detection oil mass and liquid measure, the crude output drawing is 3.59t/d, and moisture content 93.32% is connect with the measurement result of the present invention very much
Closely, accuracy and the reliability of the inventive method are demonstrated.
Claims (2)
1. a kind of carbon dioxide flooding high water-cut reservoir producing well moisture content and crude output measuring method it is characterised in that: the party
Method includes: 1) determines Liquid output and the gas production of producing well；2) gather output gas and carry out component analyses, determine sky in output gas
So Gas content, is calculated the natural gas daily output according to gas production；3) determine gas-oil ratio, be calculated according to the natural gas daily output
Oil production；4) it is calculated the average moisture content of producing well according to Liquid output and oil production.
2. measuring method according to claim 1 it is characterised in that: comprise the following steps:
1) utilize separator and the gas flowmeter of measuring station installation, measure producing well Liquid output qlAnd gas production；
2) utilize gas sample sampling apparatuses to gather gas sample in production wellhead, using gas chromatograph, component is carried out to gas sample in laboratory
Measure, determine natural Gas content in output gas, determine the daily output of producing well natural gas；
3) gas-oil ratio being obtained using oil test data or in-place oil high-voltage physics data, the daily output according to natural gas determines life
Produce oil production q of wello；
4) according to the Liquid output q of producing welllWith oil production qoRelation, determine the average moisture content of producing well: fw=(ql-qo)/
ql× 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610895468.0A CN106368673A (en) | 2016-10-13 | 2016-10-13 | Measuring method for water content and crude output of carbon dioxide flooding high water content oil reservoir producing well |
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| CN201610895468.0A CN106368673A (en) | 2016-10-13 | 2016-10-13 | Measuring method for water content and crude output of carbon dioxide flooding high water content oil reservoir producing well |
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| CN201610895468.0A Pending CN106368673A (en) | 2016-10-13 | 2016-10-13 | Measuring method for water content and crude output of carbon dioxide flooding high water content oil reservoir producing well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307880A (en) * | 2018-03-27 | 2019-10-08 | 中国石油化工股份有限公司 | Metering device and metering method suitable for High water cut experiment |
| CN110894782A (en) * | 2018-08-24 | 2020-03-20 | 中国石油天然气股份有限公司 | Method and device for determining gas storage capacity of oil reservoir and storage medium |
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