CN107237614A - A kind of method of aqueous tight gas reservoir gas well water pumping gas production - Google Patents
A kind of method of aqueous tight gas reservoir gas well water pumping gas production Download PDFInfo
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- CN107237614A CN107237614A CN201710661976.7A CN201710661976A CN107237614A CN 107237614 A CN107237614 A CN 107237614A CN 201710661976 A CN201710661976 A CN 201710661976A CN 107237614 A CN107237614 A CN 107237614A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 164
- 238000005086 pumping Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 21
- 235000020681 well water Nutrition 0.000 title claims abstract description 12
- 239000002349 well water Substances 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 182
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 230000003068 static effect Effects 0.000 claims abstract description 22
- 238000004458 analytical method Methods 0.000 claims abstract description 14
- 230000001186 cumulative effect Effects 0.000 claims description 5
- 238000011161 development Methods 0.000 abstract description 7
- 238000011156 evaluation Methods 0.000 abstract description 4
- 238000004364 calculation method Methods 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 8
- 238000013210 evaluation model Methods 0.000 description 7
- 239000006260 foam Substances 0.000 description 7
- 241000521257 Hydrops Species 0.000 description 6
- 206010030113 Oedema Diseases 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 101100063974 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) dph-3 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000476 body water Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
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- 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
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Abstract
The present invention relates to gas field development research field, and in particular to a kind of method of aqueous tight gas reservoir gas well water pumping gas production, and this method divides gas well static state production liquid type according to the average daily output tolerance peace water yield per day of gas well；Individual well in gas well liquid loading history is drawn according to accumulative WGR and adds up corresponding relation curve of the WGR with non dimensional time, gas well waterout production liquid type is divided；According to gas well static state production liquid type and gas well waterout production liquid type, alternate analysis model is set up, the fine production liquid type belonging to gas well is determined；Fine production liquid type according to belonging to gas well, with reference to the corresponding water pumping gas production suggestion of each fine production liquid type, takes corresponding water pumping gas production measure.The present invention has taken into account the static production liquid status and dynamic production liquid trend of gas well simultaneously, gas well alternate analysis model is established on the basis of theoretical calculation, realize and precise classification evaluation has been carried out to production liquid gas well, the method for providing corresponding water pumping gas production for different types of gas well based on this.
Description
Technical field
The present invention relates to gas field development research field, and in particular to a kind of side of aqueous tight gas reservoir gas well water pumping gas production
Method.
Background technology
With the increasingly exhaustion of conventional gas and oil resource, oil is increasingly becoming using tight gas as the exploitation of the unconventionaloil pool of representative
The emphasis of Gas Industry exploitation.Because tight gas reservoir reservoir properties are poor, gas production is low, and production liquid can cause conclusive to production
Influence, the main method that therefore water pumping gas production develops as tight gas reservoir.For a long time, the water pumping gas production of gas well is mostly by a line
Technical staff carry out, be all often to take unified strategy to carry out water pumping gas production for different types of gas well, it is implemented
There is no specific foundation and standard, rule of thumb carried out by Field Force mostly；Meanwhile, current water pumping gas production strategy is all root
Formulated according to current gas well liquid loading state, and actually gas well liquid loading is the process of a dynamic change, current static number
According to can not accurately characterize the dynamic development feature of gas well, it can not more be provided for the gas well liquid loading Developing Tactics in later stage enough
With reference to.
The content of the invention
The invention provides a kind of method of aqueous tight gas reservoir gas well water pumping gas production, this method has taken into account gas well simultaneously
Static state production liquid status and dynamic production liquid trend, gas well alternate analysis model is established on the basis of theoretical calculation, is realized to production
Liquid gas well has carried out precise classification evaluation, provides the side of corresponding water pumping gas production for different types of gas well based on this
Method.
In order to achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of method of aqueous tight gas reservoir gas well water pumping gas production, it is characterised in that comprise the following steps：
Step one：According to the average daily output tolerance of gas well peace water yield per day, gas well static state production liquid type is divided；
Step 2：Individual well in gas well liquid loading history is drawn according to accumulative WGR and adds up pair of the WGR with non dimensional time
Relation curve is answered, gas well waterout production liquid type is divided；
Step 3：Gas well waterout production liquid in gas well static state production liquid type and the step 2 in the step one
Type, sets up alternate analysis model, determines the fine production liquid type belonging to gas well；
Step 4：Fine production liquid type belonging to gas well in the step 4, with reference to each fine production liquid type
Corresponding water pumping gas production suggestion, takes corresponding water pumping gas production measure.
Further, the average daily output tolerance of the gas well in the step one is more than 2 × 104m3It is then high yield gas type, the gas
The average daily output tolerance of well is less than or equal to 2 × 104m3It is then low yield gas type；
The average water yield per day of the gas well is more than 2m3It is then high yield liquid type, the average water yield per day of the gas well is less than
Equal to 2m3It is then low yield liquid type.
Further, the gas well static state production liquid type in the step one includes high yield gas-low yield liquid type, high yield gas-high yield
Liquid type, low yield gas-low yield liquid type and low yield gas-high yield liquid type.
Further, the accumulative WGR in the step 2 is the daily output tolerance in gas well historical production data and day
Gas production, calculates day aqueous vapor and when adds up WGR, the accumulative WGR of gas well is the accumulative aquifer yield of certain gas well and added up
The ratio of gas production：
In formula：WGRljTo add up WGR；To add up aquifer yield, unit m3；For cumulative gas,
104m3；N is the accumulative production time, and unit is day.
Further, the gas well waterout production liquid type in the step 2 includes accumulative WGR down type, accumulative WGR
Stable type and accumulative WGR ascending-type；
The accumulative WGR down type is slope k≤tan of accumulative WGR and the non dimensional time relation curve
(-15°)；
The accumulative WGR stable type be the accumulative WGR and non dimensional time relation curve slope be tan (-
15°)<k<tan(15°)；
The accumulative WGR ascending-type is slope k >=tan of accumulative WGR and non dimensional time relation curve
(15°)。
Further, the alternate analysis model in the step 3 is every kind of gas well static state production liquid type and every kind of gas well waterout
The combination of liquid type is produced, the fine production liquid type is obtained from：
Accumulative WGR down type, the accumulative WGR of b classes of the high yield gas of I class-low yield liquid type respectively with a classes are stablized
Type, the accumulative WGR ascending-type of c classes are combined as I a, I b, I c successively；
Accumulative WGR down type, the accumulative WGR of b classes of the high yield gas of II class-high yield liquid type respectively with a classes are stablized
Type, the accumulative WGR ascending-type of c classes are combined as II a, II b, II c successively；
Low yield gas-low yield liquid of III class and the accumulative WGR down type of a classes, the accumulative WGR stable type of b classes, c classes
Accumulative WGR ascending-type be combined as III a, III b, III c successively；
IV low yield gas-high yield liquid and the accumulative WGR down type of a classes, the accumulative WGR stable type of b classes, c classes
Accumulative WGR ascending-type is combined as IV a, IV b, IV c successively.
The alternate analysis model is as shown in table 1：
The tight gas reservoir of table 1 produces liquid evaluation model
For certain one breath well, by the numerical value of the well aerogenesis/production liquid obtained with the aerogenesis of gas well/Liquid output classification
Corresponding row or column is found in alternate analysis model, then the gas well obtained with the accumulative WGR classification by gas well produces liquid trend
Corresponding column or row are found in a model, and the value of ranks intersection is the fine separating resulting of gas well, and then can be to gas well
Fluid Producing Property accurately evaluated.
Tight gas reservoir produces liquid evaluation model and tight gas reservoir production liquid gas well is divided into 12 sophisticated categories.Come for the model
Say, the classification closer to right side, its gas well gas deliverability is poorer, and liquid-producing capacity is stronger；Classification closer to lower section, the production of its gas well
Liquid more levels off to rising.
It is further, described that each finely the corresponding water pumping gas production suggestion of production liquid type is：
I a, I b type gas wells：Production status is preferable, without carrying out water pumping gas production；
I c type gas wells：Production status is preferable, without carrying out water pumping gas production, production liquid variation tendency of paying general attention；
II a, II b type gas wells：Liquid condition is produced preferably, itself fluid-carrying capability can meet discharge opeing requirement substantially, substantially without entering
Row water pumping gas production, the excessive well of Liquid output can suitably arrange interval bubble row；
II c type gas wells：Produce liquid condition preferably, itself fluid-carrying capability can meet discharge opeing requirement substantially, but on production liquid totally has
The trend of liter, can arrange interval bubble to arrange, it is ensured that shaft bottom hydrops does not increase for such gas well；
III a type gas wells：Itself fluid-carrying capability is poor, it is necessary to steep the means subband liquid such as row, and production liquid trend has taken a turn for the better, can
Continue executing with current bubble row strategy or foam discharging agent amount is reduced in the case where not influenceing production；
III b type gas wells：Itself fluid-carrying capability is poor, it is necessary to steep the means subband liquid such as row, and overall production liquid trend is relatively steady
It is fixed, continue current discharge opeing measure；
III c type gas wells：Itself fluid-carrying capability is poor, and, it is necessary to steep the means subband liquid such as row, overall production liquid is on the rise,
Production is difficult to be increased, and need to be increased current foam discharging agent amount, be improved gas well liquid loading effect；
IV a type gas wells：Liquid output high yield tolerance is low, can not effectively discharge opeing by self-ability, it is necessary to continue through bubble row
Etc. means subband liquid.Production liquid trend has taken a turn for the better at present, but still need to continue executing with current bubble row strategy preventing and treating well hydrops or
It is appropriate in the case where not influenceing production to reduce foam discharging agent amount；
IV b type gas wells：Liquid output high yield tolerance is low, can not effectively discharge opeing by self-ability, it is necessary to continue through bubble row
Etc. means subband liquid.Overall production liquid trend is stablized relatively, need to continue executing with current bubble row strategy, improve gas-liquid situation in well；
IV c type gas wells：Liquid output high yield tolerance is low, can not effectively discharge opeing by self-ability, it is necessary to continue through bubble row
Etc. means subband liquid；Overall production liquid trend is continuous worsening, and current discharge opeing measure can not can not be met in discharge opeing needs, well
Hydrops will continue to increase；Current discharge opeing dynamics need to be increased, a variety of discharge opeing measure auxiliary discharge opeings are taken simultaneously if necessary, it is ensured that gas well
Normal production.
Having the beneficial effect that produced by the present invention：
The present invention has taken into account the gas production, aquifer yield and dynamic WGR of gas well simultaneously, can describe the static production of gas well
Liquid status and dynamic production liquid trend, and to classify two kinds by the aerogenesis of gas well/Liquid output classification and by the accumulative WGR of gas well
Based on gas well sorting technique, two methods acquired results are subjected to combined crosswise, alternate analysis model is established, obtain fine
Liquid type is produced, and water feature is produced come exact evaluation gas well according to fine production liquid type, and instructs gas well draining to adopt based on this
Gas operation.
Brief description of the drawings
Fig. 1 is gas well production liquid static classification schematic diagram；
Fig. 2 is gas well production liquid dynamic cataloging schematic diagram；
Fig. 3 is gas well production liquid static classification instance graph；
Fig. 4 is that the accumulative typical well of WGR down type adds up WGR and time instance figure；
Fig. 5 is that the accumulative typical well of WGR stable type adds up WGR and time instance figure；
Fig. 6 is that the accumulative typical well of WGR ascending-type adds up WGR and time instance figure.
Embodiment
Come the further details of explanation present invention, but protection scope of the present invention with specific embodiment below in conjunction with the accompanying drawings
It is not limited to this.
Embodiment 1
Big ox hypotonic fine and close gas field D98 wellblocks gas production with only accounting for whole big ox block total output 10% or so, its
Liquid output but reaches the 40% of whole block total fluid production.Too high Liquid output significantly impacts the production capacity of D98 wellblocks, while greatly
Width adds the management difficulty of the block gas well.But for a long time for the production liquid understanding of the block and indefinite, theoretic knowledge
On shortcoming result in block bubble row it is efficient low.By taking the horizontal well of D98 wellblocks as an example, the wellblock foam is arranged by the present invention
Water operation is instructed.
Step one：The creation data of the 97 implication wells normally produced to DaNiuDi gas field D98 wellblocks is analyzed, to score
Analyse the average daily fluid production rate of every mouthful of well and averagely produce tolerance daily, liquid static classification method is produced according to gas well, divide gas well static state production
Liquid type.The average daily output tolerance of gas well is more than 2 × 104m3It is then high yield gas type, the average daily output tolerance of the gas well is less than etc.
In 2 × 104m3It is then low yield gas type；The average water yield per day of the gas well is more than 2m3Be then high yield liquid type, the gas well it is flat
Equal water yield per day is less than or equal to 2m3It is then low yield liquid type.
Specifically, according to gas well current steady creation data, the average daily fluid production rate of statistics Single Gas Well and average daily gas
Measure and shown in figure, as shown in figure 1, the region according to gas well liquid loading data in plate, is divided into four types by gas well：Ⅰ
Class-high yield gas-low yield liquid type, II class-high yield gas-high yield liquid type, III class-low yield gas-low yield liquid type and IV class-low yield gas-height
Produce liquid type.
I class-high yield gas-low yield liquid type：Such gas well deliverability is higher, and the condition of production is ideal.Its gas deliverability is stronger,
Averagely daily output tolerance is more than 2 × 104m3；Liquid is produced simultaneously less, average water yield per day is less than or equal to 2m3.Such gas well output water
Main water source is output airsetting bleed, is practically free of stratum water.
II class-high yield gas-high yield liquid type：Such gas well deliverability is higher, and average daily gas and water yield per day are higher, average
Produce tolerance daily and be more than 2 × 104m3, average water yield per day is more than 2m3.The main water source of such gas well output water is stratum water, including
Primary moveable water in layer, such as lenticular body water, construction lower curtate moveable water, and secondary moveable water in layer, such as reservoir irreducible water,
Based on secondary moveable water in layer.
III class-low yield gas-low yield liquid type：Such gas well deliverability is limited, and average daily gas and water yield per day are relatively low, average
Produce tolerance daily and be less than or equal to 2 × 104m3, average water yield per day is less than or equal to 2m3.The main water source of such gas well output water is ground
Layer water and output airsetting bleed.
IV class-low yield gas-high yield liquid type：Such gas well deliverability is relatively low, and gas deliverability is poor, averagely produce daily tolerance be less than etc.
In 2 × 104m3；But it produces liquid substantially, averagely produce water daily and be more than 2m3.The main water source of such gas well output water is stratum water, bag
Secondary moveable water in primary moveable water and layer is included in layer, based on primary moveable water in layer.
Production liquid static classification is carried out to gas well with reference to Fig. 1.Classification results are as shown in Figure 3：From figure 3, it can be seen that D98 wells
Area's producing well accounts for the 56.7% of total producing well number based on IV class well low yield gas-high yield liquid type.Next to that III class well low yield gas-
Low yield liquid type, accounts for the 33% of total producing well number.Without I class well high yield gas-low yield liquid type and II class well high yield gas-high yield liquid type.
Statistical result shows that the universal production status in D98 wellblocks is poor, with low yield gas, and high yield liquid is main production feature.
Step 2：The historical production data of the implication well of D98 wellblocks 97 is analyzed, calculates public according to accumulative WGR
Formula, calculates the accumulative WGR per implication well, draws individual well in gas well liquid loading history and adds up corresponding relation of the WGR with the time
Curve.
The accumulative WGR calculation formula is the daily output tolerance in gas well historical production data and daily output tolerance, meter
Calculate day aqueous vapor and when add up WGR, the accumulative WGR of gas well is the accumulative aquifer yield of certain gas well and the ratio of cumulative gas
Value：
In formula：WGRljTo add up WGR；To add up aquifer yield, unit m3；For cumulative gas,
104m3；N is the accumulative production time, and unit is day.
According to data are calculated, draw individual well in gas well liquid loading history and add up corresponding relation song of the WGR with non dimensional time
Line, is divided into three types according to the tracing pattern by gas well：A classes-accumulative WGR down type, b classes-accumulative WGR stable type
With c classes-accumulative WGR ascending-type.The accumulative WGR down type is bent for accumulative WGR and the non dimensional time relation
Line is less than or equal to -15 ° namely its slope k≤tan (- 15 °) with X-axis angle；The accumulative WGR stable type is described accumulative
WGR and non dimensional time relation curve with X-axis angle between -15 ° and 15 °, namely its slope tan (- 15 °)<k<
tan(15°)；The accumulative WGR ascending-type is that accumulative WGR and non dimensional time relation curve are more than with X-axis angle
15 °, namely its slope k >=tan (15 °).
A- adds up WGR down type：Such gas well is constantly reduced with the passage of development time, its aquifer yield, and it adds up
WGR is in totally continuous decrease trend.Development late stage is more arrived, its WGR is lower.The main output water source at such gas well initial stage
For stratum water, the later stage is stratum water and condensation water.
B- adds up WGR stable type：Such gas well is with the passage of development time, the change width of its aerogenesis and aquifer yield
Degree is relatively stablized, and its accumulative WGR is also in totally stable tendency.The main output water source of such gas well is stratum water and condensation
Water.
C- adds up WGR ascending-type：Such gas well is with the passage of development time, and its gas production fall is substantially big
In Liquid output fall, add up WGR totally in lasting ascendant trend.The main output water source of such gas well is stratum water
Or edge-bottom water.
With reference to Fig. 2 to every implication well carry out production liquid dynamic cataloging, Different Dynamic production liquid type typical well add up WGR/
Time curve is as shown in Fig. 4~Fig. 6.Dynamic cataloging result shows that it is steady that D98 wellblocks producing well adds up WGR with b classes well
Based on sizing, the 54.6% of total producing well number is accounted for.Next to that a classes well adds up WGR down type, total producing well number is accounted for
24.7%；C classes well adds up WGR ascending-type, accounts for the 20.6% of total producing well number.Statistical result shows that area's gas well production water is total
Body is relatively stablized, and main production feature is stabilized to relatively with low yield gas, high yield liquid and aerogenesis/Liquid output.
Step 3：According to gas well static state production liquid type and gas well waterout production liquid type, alternate analysis model, such as table 1 are set up
It is shown, determine the fine production liquid type belonging to gas well.Aqueous tight gas reservoir gas well is finely divided into 12 groups.Alternate analysis mould
The crosspoint of each in type just represents a specific fine gas well production liquid type.Each fine gas well production liquid type can be
Corresponding production liquid status and production liquid trend are found in model, so that the comprehensive final production liquid evaluation result for obtaining the gas well.
The tight gas reservoir of table 1 produces liquid evaluation model
For the specific gas well of certain a bite, by the well aerogenesis/production liquid obtained with the aerogenesis of gas well/Liquid output classification
Numerical value find corresponding row or column in alternate analysis model, then the gas well obtained with the accumulative WGR classification by gas well is produced
Liquid trend finds corresponding column or row in a model, and the value of ranks intersection is the fine separating resulting of gas well, and then can be with
The Fluid Producing Property of gas well is accurately evaluated.
Tight gas reservoir production liquid gas well is divided into 12 sophisticated categories by the production liquid evaluation model in the present invention.Come for the model
Say, the classification closer to right side, its gas well gas deliverability is poorer, and liquid-producing capacity is stronger；Classification closer to lower section, the production of its gas well
Liquid more levels off to rising.
With reference to the present embodiment, the static classification and dynamic result of every implication well are counted, and proposes in the present invention
Sorted out in tight gas reservoir production liquid evaluation model, be shown in Table 2
The D98 wellblocks Single Gas Well production liquid classification of assessment of table 2
| Pound sign | Classification | Pound sign | Classification | Pound sign | Classification | Pound sign | Classification |
| D113 | Ⅲa | DP53H | Ⅲb | DPH-45 | Ⅲb | DPHS-72-2 | Ⅳb |
| D12-50 | Ⅲb | DP58H | Ⅲb | DPH-47 | Ⅳb | DPHS-72-3 | Ⅳa |
| D12-51 | Ⅲc | DP60H | Ⅳc | DPH-51 | Ⅳc | DPHS-72-4 | Ⅳb |
| D12-52 | Ⅲb | DP66H | Ⅳc | DPH-6 | Ⅲa | DPS-11 | Ⅲb |
| D12-58 | Ⅲb | DP69H | Ⅲb | DPH-60 | Ⅳb | DPS-13 | Ⅳb |
| D12-59 | Ⅲc | DPH-102 | Ⅱb | DPH-61 | Ⅳb | DPS-14 | Ⅳb |
| D28 | Ⅲb | DPH-103 | Ⅱc | DPH-64 | Ⅳb | DPS-24 | Ⅳa |
| D28-1 | Ⅲa | DPH-112 | Ⅳc | DPH-65 | Ⅳb | DPS-27 | Ⅳb |
| D28-2 | Ⅲb | DPH-113 | Ⅳb | DPH-73 | Ⅲb | DPS-28 | Ⅲb |
| D28-3 | Ⅲa | DPH-115 | Ⅱc | DPH-74 | Ⅲb | DPS-31 | Ⅳb |
| D28-4 | Ⅲb | DPH-116 | Ⅱb | DPH-75 | Ⅳc | DPS-33 | Ⅳa |
| D28-5 | Ⅲa | DPH-121 | Ⅳc | DPH-76 | Ⅳb | DPS-45 | Ⅳa |
| D36 | Ⅲa | DPH-122 | Ⅳb | DPH-77 | Ⅲb | DPS-48 | Ⅳa |
| D91 | Ⅲb | DPH-123 | Ⅳb | DPH-78 | Ⅳb | DPS-49 | Ⅳa |
| D96 | Ⅲa | DPH-124 | Ⅱb | DPH-79 | Ⅳb | DPS-50 | Ⅳb |
| D97 | Ⅲb | DPH-19 | Ⅳb | DPH-83 | Ⅳb | DPS-52 | Ⅳb |
| DP19 | Ⅲa | DPH-20 | Ⅳc | DPH-87 | Ⅳa | DPS-53 | Ⅳa |
| DP29H | Ⅳa | DPH-24 | Ⅲb | DPH-88 | Ⅳb | DPS-71 | Ⅱc |
| DP4 | Ⅲa | DPH-25 | Ⅲb | DPH-89 | Ⅳc | DPS-73 | Ⅱc |
| DP40H | Ⅳb | DPH-26 | Ⅳc | DPH-90 | Ⅳb | DPS-82 | Ⅱa |
The (Continued) of table 2
| DP41S | Ⅳc | DPH-27 | Ⅳb | DPH-91 | Ⅱa | DPS-88 | Ⅳc |
| DP48S | Ⅳb | DPH-3 | Ⅲb | DPH-92 | Ⅳa | DPT-67 | Ⅳa |
| DP49S | Ⅳc | DPH-41 | Ⅳc | DPH-93 | Ⅳb | ||
| DP50S | Ⅲb | DPH-42 | Ⅳc | DPH-94 | Ⅳa | ||
| DP52H | Ⅳb | DPH-43 | Ⅳb | DPH-98 | Ⅱa |
All kinds of gas well numbers in the area are counted, are shown in Table 3 by binding model, all kinds of well quantity of comprehensive statistics
The D98 wellblocks gas well production liquid classification of assessment statistics of table 3
From table 3 it is observed that most of gas well of D98 wellblocks is all located at the lower right region of evaluation model, that is,
Say, most of gas well liquid loading situation of D98 wellblocks it is poor, it is necessary to carry out manual intervention operation administer current gas well containing watery
Condition.For IV c and the gas well of IV b classes, optimize current drainage measure, reinforced platoon's waterpower degree, it is ensured that gas as early as possible
Well can be produced continually and steadily.
Step 4：Classified according to the specific production liquid of every implication well, the draining for all kinds of gas wells is advised, every mouthful of well is directed to
The execution water pumping gas production strategy of property.
For each class gas well in gas well sophisticated category, because its aerogenesis-production liquid static nature and aerogenesis-production are surged state
Variation tendency is different, therefore the foaming water discharge guideline and method of each class gas well also should difference.Therefore, cause
Close gas reservoir production liquid evaluation model provides foundation for the fine improvement of gas well, i.e., for gas well is administered, closer to left side with
The classification of top, the improvement of gas well is simpler, for the ⅰa-type gas well in the upper left corner, is controlled substantially without production fluid is carried out
Reason；And gas well is closer to the classification of right side and lower section, gas well liquid loading is more difficult, and the need of the work of water pumping gas production are administered to production fluid
Ask and more seem urgent, for the IV c type gas wells in the lower right corner, produce highly difficult and over time, production
Difficulty can be increased further, it is necessary to increase water pumping gas production dynamics as early as possible, optimize water pumping gas production scheme to ensure the stable life of gas well
Production.The specific water pumping gas production suggestion respectively classified is as follows：
I a, I b type gas wells：Production status is preferable, without carrying out water pumping gas production.
I c type gas wells：Production status is preferable, without carrying out water pumping gas production, production liquid variation tendency of paying general attention.
II a, II b type gas wells：Liquid condition is produced preferably, itself fluid-carrying capability can meet discharge opeing requirement substantially, substantially without entering
Row water pumping gas production, the excessive well of Liquid output can suitably arrange interval bubble row.
II c type gas wells：Produce liquid condition preferably, itself fluid-carrying capability can meet discharge opeing requirement substantially, but on production liquid totally has
The trend of liter, can arrange interval bubble to arrange, it is ensured that shaft bottom hydrops does not increase for such gas well.
III a type gas wells：Itself fluid-carrying capability is poor, it is necessary to steep the means subband liquid such as row, and production liquid trend has taken a turn for the better, can
Continue executing with current bubble row strategy or foam discharging agent amount is reduced in the case where not influenceing production.
III b type gas wells：Itself fluid-carrying capability is poor, it is necessary to steep the means subband liquid such as row, and overall production liquid trend is relatively steady
It is fixed, continue current discharge opeing measure.
III c type gas wells：Itself fluid-carrying capability is poor, and, it is necessary to steep the means subband liquid such as row, overall production liquid is on the rise,
Production is difficult to be increased, and need to be increased current foam discharging agent amount, be improved gas well liquid loading effect.
IV a type gas wells：Liquid output high yield tolerance is low, can not effectively discharge opeing by self-ability, it is necessary to continue through bubble row
Etc. means subband liquid.Production liquid trend has taken a turn for the better at present, but still need to continue executing with current bubble row strategy preventing and treating well hydrops or
It is appropriate in the case where not influenceing production to reduce foam discharging agent amount.
IV b type gas wells：Liquid output high yield tolerance is low, can not effectively discharge opeing by self-ability, it is necessary to continue through bubble row
Etc. means subband liquid.Overall production liquid trend is stablized relatively, need to continue executing with current bubble row strategy, improve gas-liquid situation in well.
IV c type gas wells：Liquid output high yield tolerance is low, can not effectively discharge opeing by self-ability, it is necessary to continue through bubble row
Etc. means subband liquid.Overall production liquid trend is continuous worsening, and current discharge opeing measure can not can not be met in discharge opeing needs, well
Hydrops will continue to increase.Current discharge opeing dynamics need to be increased, a variety of discharge opeing measure auxiliary discharge opeings are taken simultaneously if necessary, it is ensured that gas well
Normal production.
After suggested by the above implement one month, block produces tolerance daily by 82.5 × 104m before3/ d brings up to 86.6
×104m3/ d, daily output tolerance improves 4.1 × 104m3/d；Block daily fluid production rate is by 412m before3/ d brings up to 447m3/ d, day
Gas production improves 35m3/d；Rate brings up to 87.3% by 84.1% before during gas well liquid loading, improves 3.2%.Gas well aerogenesis is produced
Liquid measure rises, and production effect is obviously improved, and foaming water discharge adjustment effect is obvious.
It is noted that above-described embodiment is to the illustrative and not limiting of technical solution of the present invention, art is general
The equivalent substitution of logical technical staff or the other modifications made according to prior art, as long as not exceeding technical solution of the present invention
Thinking and scope, should be included within interest field of the presently claimed invention.
Claims (6)
1. a kind of method of aqueous tight gas reservoir gas well water pumping gas production, it is characterised in that comprise the following steps：
Step one：According to the average daily output tolerance of gas well peace water yield per day, gas well static state production liquid type is divided；
Step 2：Individual well in gas well liquid loading history is drawn according to accumulative WGR and adds up correspondence pass of the WGR with non dimensional time
It is curve, divides gas well waterout production liquid type；
Step 3：Gas well waterout production liquid class in gas well static state production liquid type and the step 2 in the step one
Type, sets up alternate analysis model, determines the fine production liquid type belonging to gas well；
Step 4：Fine production liquid type belonging to gas well in the step 4, with reference to each fine production liquid type correspondence
Water pumping gas production suggestion, take corresponding water pumping gas production measure.
2. a kind of method of aqueous tight gas reservoir gas well water pumping gas production according to claim 1, it is characterised in that the step
The average daily output tolerance of gas well in rapid one is more than 2 × 104m3It is then high yield gas type, the average daily output tolerance of the gas well is less than
Equal to 2 × 104m3It is then low yield gas type；
The average water yield per day of the gas well is more than 2m3It is then high yield liquid type, the average water yield per day of the gas well is less than or equal to
2m3It is then low yield liquid type.
3. a kind of method of aqueous tight gas reservoir gas well water pumping gas production according to claim 1, it is characterised in that the step
Gas well static state production liquid type in rapid one include high yield gas-low yield liquid type, high yield gas-high yield liquid type, low yield gas-low yield liquid type and
Low yield gas-high yield liquid type.
4. a kind of method of aqueous tight gas reservoir gas well water pumping gas production according to claim 1, it is characterised in that the step
Accumulative WGR in rapid two is the daily output tolerance in gas well historical production data and daily output tolerance, calculates day aqueous vapor when
Accumulative WGR, the accumulative WGR of gas well is the accumulative aquifer yield of certain gas well and the ratio of cumulative gas：
<mrow>
<msub>
<mi>WGR</mi>
<mrow>
<mi>l</mi>
<mi>j</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<munderover>
<mi>&Sigma;</mi>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msub>
<mi>Q</mi>
<mi>w</mi>
</msub>
</mrow>
<mrow>
<munderover>
<mi>&Sigma;</mi>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msub>
<mi>Q</mi>
<mi>g</mi>
</msub>
</mrow>
</mfrac>
</mrow>
In formula：WGRljTo add up WGR；To add up aquifer yield, unit m3；For cumulative gas, 104m3；N is
The accumulative production time, unit is day.
5. a kind of method of aqueous tight gas reservoir gas well water pumping gas production according to claim 1, it is characterised in that the step
Gas well waterout production liquid type in rapid two includes accumulative WGR down type, accumulative WGR stable type and accumulative WGR and risen
Type；
The accumulative WGR down type for accumulative WGR and the non dimensional time relation curve slope k≤tan (-
15°)；
The accumulative WGR stable type is the slope tan (- 15 °) of accumulative WGR and the non dimensional time relation curve<k
<tan(15°)；
The accumulative WGR ascending-type is slope k >=tan (15 °) of accumulative WGR and non dimensional time relation curve.
6. a kind of method of aqueous tight gas reservoir gas well water pumping gas production according to claim 1, it is characterised in that the step
Alternate analysis model in rapid three produces the combination of liquid type for every kind of gas well static state production liquid type with every kind of gas well waterout, so that
To it is described it is fine production liquid type be：
The high yield gas of I class-low yield liquid type respectively with the accumulative WGR down type of a classes, the accumulative WGR stable type of b classes, c classes
Accumulative WGR ascending-type be combined as I a, I b, I c successively；
The high yield gas of II class-high yield liquid type respectively with the accumulative WGR down type of a classes, the accumulative WGR stable type of b classes, c
The accumulative WGR ascending-type of class is combined as II a, II b, II c successively；
Low yield gas-low yield liquid of III class and the accumulative WGR down type of a classes, the accumulative WGR stable type of b classes, c classes it is tired
Meter WGR ascending-type is combined as III a, III b, III c successively；
IV low yield gas-high yield liquid and the accumulative WGR down type of a classes, the accumulative WGR stable type of b classes, c classes it is accumulative
WGR ascending-type is combined as IV a, IV b, IV c successively.
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| CN108150158A (en) * | 2017-12-13 | 2018-06-12 | 西安石油大学 | A kind of deeper clefts DAMAGE OF TIGHT SAND GAS RESERVOIRS early stage water analysis and Forecasting Methodology |
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| CN113550744A (en) * | 2020-04-26 | 2021-10-26 | 中国石油天然气股份有限公司 | Shale gas drainage and gas recovery effect evaluation method |
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| CN112727452A (en) * | 2020-09-29 | 2021-04-30 | 中国石油天然气集团有限公司 | Description method for movable water distribution of tight sandstone gas reservoir |
| CN112727452B (en) * | 2020-09-29 | 2024-06-07 | 中国石油天然气集团有限公司 | Method for describing movable water distribution of tight sandstone gas reservoir |
| CN112228053A (en) * | 2020-11-06 | 2021-01-15 | 中国石油天然气股份有限公司 | Method for optimizing well opening time of intermittent well of tight gas reservoir |
| CN112228053B (en) * | 2020-11-06 | 2024-03-01 | 中国石油天然气股份有限公司 | Method for optimizing open time of intermittent well of tight gas reservoir |
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