CN106022943A - Method and device for determining gas recovery technology - Google Patents
Method and device for determining gas recovery technology Download PDFInfo
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- CN106022943A CN106022943A CN201610334183.XA CN201610334183A CN106022943A CN 106022943 A CN106022943 A CN 106022943A CN 201610334183 A CN201610334183 A CN 201610334183A CN 106022943 A CN106022943 A CN 106022943A
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Abstract
The invention provides a method and device for determining a gas recovery technology. The method includes the steps of: measuring carbon isotope data of natural gas recovered by a plurality of production wells from a gas reservoir in a plurality of production periods; according to the carbon isotope data and pressure data of the gas reservoirs, performing fitting to obtain a variation relation of the natural gas carbon isotope with the pressure of the gas reservoir; according to the variation relation, determining the type of natural gas recovered by the plurality of production wells; measuring a carbon isotope value of the natural gas recovered by a production well to be adjusted; and adjusting the gas recovery technology of the production well to be adjusted according to the variation relation, the type and the carbon isotope value. The method for determining the gas recovery technology can predict gas recovery disadvantages so as to reasonably adjust the gas recovery technology of the production well.
Description
Technical field
The present invention relates to oil-gas exploration and development technical field, particularly relate to the determination method and device of a kind of gas producing technology.
Background technology
Natural gas is clean energy resource, and along with the fast development of whole world market for natural gas, exploration and development also produces more sky
So gas has become the important mission of Gas Company.Conventional gas is hidden similar with oil reservoir, and at deep under ground, natural gas exists
Under buoyancy, gas is above (for free gas), and water is below, gas-water separation, but there is a large amount of dissolving in water
Gas, for Water Soluble Gas.Natural gas pool is developed, the free gas on main exploitation gas-water interface.But it is as gas production
Increase or gas producting rate is unreasonable or technological measure does not matches, all may result in water breakthrough, cause gas reservoir by water logging, cause sky
So gas can not extraction, in gas reservoir a large amount of natural gass cannot extraction, cause heavy losses.
How to formulate rational gas producing technology and be always the crucial problem of the construction of natural gas fields.It is to say, at natural gas pool
Gathering in gas component, if being all free gas, exploitation rate can be accelerated；If it find that there is Water Soluble Gas to be mixed into,
Gas producting rate must be adjusted, and adjust corresponding technological measure in time, it is ensured that the normal output of gas well.But, up till now
Till, still do not have effective method can in the case of look-ahead gas production drawback rational gas producing technology.
Summary of the invention
The present invention provides the determination method and device of a kind of gas producing technology, with solve prior art can not look-ahead gas production
Drawback is with the problem formulating reasonable gas producing technology.
The present invention provides a kind of determination method of gas producing technology, including: measure many mouthfuls of producing wells multiple production period from
The carbon isotopic data of the adopted natural gas of gas reservoir；According to described carbon isotopic data and the pressure data of described gas reservoir, intend
Close and obtain the carbon isotope of natural gas variation relation with the pressure of described gas reservoir；Determine described many according to described variation relation
The type of mouth the adopted natural gas of producing well；Measure the carbon isotope value of an adopted natural gas of producing well to be adjusted；According to institute
State variation relation, described type and described carbon isotope value and adjust the gas producing technology of described producing well to be adjusted.
In one embodiment, measure many mouthfuls of producing wells in multiple production period from the carbon isotope number of the adopted natural gas of gas reservoir
According to, including: measure described many mouthfuls of producing wells by initial stage of production to the water outlet phase from each component of the adopted natural gas of described gas reservoir
Carbon isotopic data.
In one embodiment, described method also includes: utilizes and changes described in the creation data correction of described many mouthfuls of producing wells
Relation.
In one embodiment, described creation data includes: instantaneous gas production data and oil pressure data.
In one embodiment, determine the type of described many mouthfuls of the adopted natural gass of producing well according to described variation relation, including:
Determine that the first carbon that described many mouthfuls of the adopted natural gass of producing well are become gaseous mixture from free gas is same according to described variation relation
Position element cut off value and become the second carbon isotope cut off value of Water Soluble Gas from gaseous mixture.
In one embodiment, adjust described to be adjusted according to described variation relation, described type and described carbon isotope value
The gas producing technology of producing well, including: according to the carbon isotope value of described the adopted natural gas of producing well to be adjusted and described the
One carbon isotope cut off value and described second carbon isotope cut off value comparative result therebetween, adjust described to be adjusted
The gas producing technology of producing well.
In one embodiment, the carbon isotope value according to described the adopted natural gas of producing well to be adjusted is same with described first carbon
Position element cut off value and described second carbon isotope cut off value comparative result therebetween, adjust described producing well to be adjusted
Gas producing technology, including: judge that the carbon isotope value of described the adopted natural gas of producing well to be adjusted is whether less than described the
One carbon isotope cut off value and the absolute value with the difference of described first carbon isotope cut off value are more than the first setting value；If
It is to adjust described producing well to be adjusted with first rate gas production；If it is not, determine whether described producing well institute to be adjusted
Whether the carbon isotope value adopting natural gas less than described second carbon isotope cut off value and divides with described second carbon isotope
The absolute value of the difference of dividing value is more than the second setting value；If so, described producing well to be adjusted is adjusted with the second speed gas production；
Wherein, described first rate is more than described second speed.
The present invention also provides for the determination device of a kind of gas producing technology, including: the first carbon isotope determination unit, it is used for surveying
Fixed many mouthfuls of producing wells in multiple production period from the carbon isotopic data of the adopted natural gas of gas reservoir；Carbon isotope and gas reservoir pressure
Power relation signal generating unit, for according to described carbon isotopic data and the pressure data of described gas reservoir, matching obtains natural
Gas carbon isotope is with the variation relation of the pressure of described gas reservoir；Natural Gas Type determines unit, for according to described change
Relation determines the type of described many mouthfuls of the adopted natural gass of producing well；Second carbon isotope determination unit, treats for measuring one
Adjust the carbon isotope value of the adopted natural gas of producing well；Gas producing technology adjustment unit, for according to described variation relation,
Described type and described carbon isotope value adjust the gas producing technology of described producing well to be adjusted.
In one embodiment, described first carbon isotope determination unit includes: the first carbon isotope measures module, is used for
Measure described many mouthfuls of producing wells by initial stage of production to the water outlet phase from the carbon coordination of each component of the adopted natural gas of described gas reservoir
Prime number evidence.
In one embodiment, described device also includes: carbon isotope and gas reservoir pressure dependence amending unit, is used for utilizing
Variation relation described in the creation data correction of described many mouthfuls of producing wells.
In one embodiment, described carbon isotope and gas reservoir pressure dependence amending unit are additionally operable to perform: described production number
According to including: instantaneous gas production data and oil pressure data.
In one embodiment, described Natural Gas Type determines that unit includes: Natural Gas Type determines module, for basis
Described variation relation determines that described many mouthfuls of the adopted natural gass of producing well are become the first carbon isotope of gaseous mixture from free gas
Cut off value and become the second carbon isotope cut off value of Water Soluble Gas from gaseous mixture.
In one embodiment, described gas producing technology adjustment unit includes: gas producing technology adjusting module, for according to described
The carbon isotope value of the adopted natural gas of producing well to be adjusted is same with described first carbon isotope cut off value and described second carbon
Position element cut off value comparative result therebetween, adjusts the gas producing technology of described producing well to be adjusted.
In one embodiment, described gas producing technology adjusting module includes: the first judge module, be used for judging described in wait to adjust
Whether the carbon isotope value of the adopted natural gas of whole producing well is less than described first carbon isotope cut off value and with described first
The absolute value of the difference of carbon isotope cut off value is more than the first setting value；If so, first rate adjustment module, for adjusting
Described producing well to be adjusted is with first rate gas production；Second judge module, for if it is not, wait described in determining whether to adjust
Whether the carbon isotope value of the adopted natural gas of whole producing well is less than described second carbon isotope cut off value and with described second
The absolute value of the difference of carbon isotope cut off value is more than the second setting value；If so, second rate adaptation module, for adjusting
Described producing well to be adjusted is with the second speed gas production；Wherein, described first rate is more than described second speed.
The determination method and device of the gas producing technology of the present invention, is finding that carbon isotope of natural gas changes with Natural Gas Type
On the basis of relation, adjust the gas producing technology of producing well according to the carbon isotope value of the adopted natural gas of producing well, it is possible to real
The most quick and precisely predict the node of producing well gas production state, the accordingly gas producing technology of timely Reasonable adjustment producing well, it is possible to
Solving prior art can not the drawback of look-ahead producing well gas producing technology, it is possible to significantly improve the gas recovery velocity of producing well
With gas reservoir development efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only
It is some embodiments of the present invention, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of the determination method of the gas producing technology of one embodiment of the invention；
Fig. 2 is the schematic flow sheet of the determination method of the gas producing technology of another embodiment of the present invention
Fig. 3 is the schematic flow sheet of the method for the gas producing technology adjusting producing well to be adjusted in one embodiment of the invention；
Fig. 4 is the curve synoptic diagram that in one embodiment of the invention, carbon isotope of natural gas changes with gas reservoir pressure；
Fig. 5 is the structural representation of the determination device of the gas producing technology of one embodiment of the invention；
Fig. 6 is the structural representation of the determination device of the gas producing technology of another embodiment of the present invention；
Fig. 7 is the structural representation of gas producing technology adjusting module in one embodiment of the invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the accompanying drawings to this
Bright embodiment is described in further details.Here, the schematic description and description of the present invention is used for explaining the present invention,
But it is not as a limitation of the invention.
Fig. 1 is the schematic flow sheet of the determination method of the gas producing technology of one embodiment of the invention.As it is shown in figure 1, this
The determination method of the gas producing technology of bright embodiment, it may include step:
S110: measure many mouthfuls of producing wells in multiple production period from the carbon isotopic data of the adopted natural gas of gas reservoir；
S120: according to above-mentioned carbon isotopic data and the pressure data of above-mentioned gas reservoir, matching obtains carbon isotope of natural gas
Variation relation with the pressure of above-mentioned gas reservoir；
S130: determine the type of above-mentioned many mouthfuls of the adopted natural gass of producing well according to above-mentioned variation relation；
S140: measure the carbon isotope value of an adopted natural gas of producing well to be adjusted；
S150: adjust above-mentioned producing well to be adjusted according to above-mentioned variation relation, the above-mentioned type and above-mentioned carbon isotope value
Gas producing technology.
In above-mentioned steps S110, multiple production can be period from initial stage of production to during a large amount of water outlet of gas production exhaustion
One or more production period, it is preferred that from initial stage of production until a large amount of water outlet of gas production exhaustion, consequently, it is possible to
Carbon isotopic data is abundant comprehensively, is conducive to improving the accuracy adjusting collection technology.Many mouthfuls of producing wells could be for
Exploit the gas well of same gas reservoir.This carbon isotopic data can be obtained by multiple method.Adopted natural gas can comprise
Various ingredients, this carbon isotopic data can include the carbon isotope value of the various ingredients of natural gas.In one embodiment,
The producing well of optional more than three mouthfuls, produces tracking in period in difference and carries out natural gas sampling, and can be to each sample point
(time point) obtains Production development data and pressure data.
In above-mentioned steps S120, carbon isotope of natural gas can be natural with the variation relation of the pressure of above-mentioned gas reservoir
Gas carbon isotope is with the change formula of recovery percent.Inventor finds the carbon isotope of natural gas change with the pressure of gas reservoir
In relation, carbon isotope of natural gas can have certain Changing Pattern, particularly free gas and Water Soluble Gas with recovery percent
The carbon isotope obvious difference of the two, different regions carbon isotope of natural gas also can have different.Above-mentioned variation relation
The change of recovery percent can be reflected.
In one embodiment, inventor finds that above-mentioned difference can be relevant with the Organic matter type of hydrocarbon source rock and evolution level,
One area or series of strata need creation data and the carbon isotopic data of the producing well according to more than 3 mouthfuls, set up plan
Close formula, the carbon isotope of natural gas change with recovery percent can be reflected more accurately.It is preferred that described many mouthfuls of lifes
Produce well the most normally to produce, until dropping to a large amount of water outlet under yield, thus, it is possible to represent gas reservoir well natural
Gas basic feature.
In above-mentioned steps S130, the type of adopted natural gas can refer to, natural gas be free gas, Water Soluble Gas or the two
Gaseous mixture.According to carbon isotope of natural gas with the variation relation of recovery percent, it may be determined that the natural gas of extraction is free
Still the two mixing of gas or Water Soluble Gas.In one embodiment, can get free gas and water-soluble according to above-mentioned variation relation
The carbon isotope cut off value of both gas, this cut off value can be the exhaustion value of free gas, now Water Soluble Gas gradually output,
I.e. critical state, can determine the type of natural gas according to this cut off value.
In above-mentioned steps S140, the mensuration analysis method of carbon isotope value can be with the carbon coordination in above-mentioned steps S110
It is identical that the mensuration of prime number evidence analyzes method.
In above-mentioned steps S150, according to above-mentioned variation relation and the above-mentioned type it is known that Natural Gas Type is same with carbon
The situation of change of position prime number evidence, in conjunction with the carbon isotope value of the adopted natural gas of producing well to be adjusted, it is known that to be adjusted
The type of the adopted natural gas of producing well, thus it is tracked sampling by natural gas adopted to producing well to be adjusted, and obtain
Take corresponding carbon isotope value, the type of this adopted natural gas of producing well to be adjusted can be monitored, thus reach rationally to adjust
The purpose of the gas producing technology of this producing well to be adjusted whole.
In one embodiment, in above-mentioned steps S110, measure many mouthfuls of producing wells in multiple production period from gas reservoir institute
The method adopting the carbon isotopic data of natural gas, detailed description of the invention may is that the above-mentioned many mouthfuls of producing wells of mensuration are by exploiting
Initial stage to the water outlet phase is from the carbon isotopic data of each component of the adopted natural gas of above-mentioned gas reservoir.
In the present embodiment, by initial stage of production can include multiple production period to the water outlet phase, such as the initial stage of production of can including,
During stable yields, drop antenatal, fall produce time, fall puerperal, water outlet etc..The data that natural gas sampling obtains are the most intensive more good,
More rich carbon isotopic data can be obtained, be conducive to obtaining the higher carbon isotope of natural gas of more degree of accuracy with above-mentioned
The variation relation of the pressure of gas reservoir.
In one embodiment, adopted natural gas can use anticorrosion steel cylinder collection, and steel pressure of the inside of a bottle is positively retained at 1～2 MPa,
Volume can be 1 liter.Natural gas sample is carried out carbon isotope and is measured analysis, and analysis project can include Various Components In Natural Gas
The carbon isotope of carbon isotope, such as methane gas.
In one embodiment, the determining instrument of employing can be Thermo Delta V Advantage, and analysis precision can be
±0.1‰。
In one embodiment, the carbon isotope of different producing wells and different gas component can together be used for matching and obtain
Carbon isotope of natural gas is with the variation relation of the pressure of above-mentioned gas reservoir.
Fig. 2 is the schematic flow sheet of the determination method of the gas producing technology of another embodiment of the present invention.As in figure 2 it is shown, figure
The determination method of the gas producing technology shown in 1, may further comprise the step of:
S160: utilize the above-mentioned variation relation of creation data correction of above-mentioned many mouthfuls of producing wells.
In above-mentioned steps S160, it is appreciated that the matching of step S120 obtains in conjunction with the creation data of producing well natural
Whether gas carbon isotope tallies with the actual situation with the variation relation of the pressure of above-mentioned gas reservoir, can improve above-mentioned change with this
The correctness of relation.
In one embodiment, above-mentioned creation data comprises the steps that instantaneous gas production data and oil pressure data.
In the present embodiment, instantaneous gas production data and oil pressure data can be obtained by multiple method, such as, each
Sample point can obtain Production development data and/or pressure data, and these data, can be according to Instruments in Well Site dish when sampling
The data shown at that time are registered.
In one embodiment, in above-mentioned steps S130, determine above-mentioned many mouthfuls of producing well institutes according to above-mentioned variation relation
The method adopting the type of natural gas, detailed description of the invention may is that and determines above-mentioned many mouthfuls of productions according to above-mentioned variation relation
The adopted natural gas of well is become the first carbon isotope cut off value of gaseous mixture from free gas and is become Water Soluble Gas from gaseous mixture
Second carbon isotope cut off value.
In the present embodiment, can determine according to carbon isotope of natural gas with the change of recovery percent (pressure change reflection)
Going out two flex points, it is free gas or Water Soluble Gas that the two flex point can represent the natural gas of extraction, can be mixed between flex point
Close gas, can be as the critical time window adjusting gas producing technology.The two flex point, namely two critical point, the
One critical point can represent in free gas and start to be mixed into Water Soluble Gas, reflects it may happen that water breakthrough, and gas reservoir may quilt
The risk of water logging, can be as the prime time window taking technological measure.Second critical point can represent free gas and open
Adopting exhaustion, gas reservoir is thoroughly by water logging.
In one embodiment, in above-mentioned steps S150, same according to above-mentioned variation relation, the above-mentioned type and above-mentioned carbon
Position element value adjusts the method for the gas producing technology of above-mentioned producing well to be adjusted, it may include step:
S151: according to carbon isotope value and the above-mentioned first carbon isotope boundary of above-mentioned the adopted natural gas of producing well to be adjusted
Value and above-mentioned second carbon isotope cut off value comparative result therebetween, adjust the gasworker of above-mentioned producing well to be adjusted
Skill.
In above-mentioned steps S151, above-mentioned first carbon isotope cut off value can be to be become gaseous mixture from free gas
Flex point, above-mentioned second carbon isotope cut off value can be the flex point being become Water Soluble Gas from gaseous mixture, according to above-mentioned to be adjusted
The carbon isotope value of the adopted natural gas of producing well is relative to the position of the two flex point, it can be determined that producing well institute to be adjusted
Adopt the type of natural gas, and then corresponding collection technology can be used, to reach the efficient gas production of many gas production and fast gas production
Purpose.
Fig. 3 is the schematic flow sheet of the method for the gas producing technology adjusting producing well to be adjusted in one embodiment of the invention.
As it is shown on figure 3, in above-mentioned steps S151, according to the carbon isotope value of above-mentioned the adopted natural gas of producing well to be adjusted
With above-mentioned first carbon isotope cut off value and above-mentioned second carbon isotope cut off value comparative result therebetween, in adjustment
The method stating the gas producing technology of producing well to be adjusted, it may include step:
S1511: judge that the carbon isotope value of above-mentioned the adopted natural gas of producing well to be adjusted is the most same less than above-mentioned first carbon
Position element cut off value and the absolute value with the difference of above-mentioned first carbon isotope cut off value are more than the first setting value；
S1512: if so, adjust above-mentioned producing well to be adjusted with first rate gas production；
S1513: if it is not, determine whether whether the carbon isotope value of above-mentioned the adopted natural gas of producing well to be adjusted is less than
Above-mentioned second carbon isotope cut off value and the absolute value with the difference of above-mentioned second carbon isotope cut off value set more than second
Value；
S1514: if so, adjust above-mentioned producing well to be adjusted with the second speed gas production；Wherein, above-mentioned first rate is big
In above-mentioned second speed.
In above-mentioned steps S1511 and S1512, carbon isotope value can be negative value, along with the constantly exploitation carbon of natural gas is same
Position element value can constantly increase, with this, if the carbon isotope value of the adopted natural gas of producing well to be adjusted is less than above-mentioned first carbon
Isotope cut off value, it may be said that the natural gas that bright producing well to be adjusted is currently adopted is free gas, meanwhile, if above-mentioned
The absolute value of the difference of one carbon isotope cut off value is more than the first setting value, then can illustrate what producing well to be adjusted was currently adopted
Gaseous mixture is become the most farther out in natural gas, at this point it is possible to the quick gas production of first rate.Above-mentioned steps S1513 and S1514
In, if the carbon isotope value of above-mentioned the adopted natural gas of producing well to be adjusted is more than above-mentioned first carbon isotope cut off value, little
In above-mentioned second carbon isotope cut off value, then illustrate that the natural gas that producing well to be adjusted is currently adopted is gaseous mixture, meanwhile,
If the absolute value of the difference of the carbon isotope value of the adopted natural gas of producing well to be adjusted and above-mentioned second carbon isotope cut off value
More than the second setting value, illustrate natural gas that producing well to be adjusted currently adopted from becoming Water Soluble Gas farther out, now, can
With the second less speed gas production.
In one embodiment, rational gas production mode can be adjusted according to the change of individual well carbon isotope of natural gas or takes
Engineering measure.Specifically, such as, the natural gas sample for some gas reservoir is acquired, and can analyze carbon coordination
Element, it is judged that its distance free gas gathers the approximate time point of exhaustion, with timely adjusting process measure.In one embodiment,
First flex point of distance farther out, can strengthen gas producting rate；If closed on, gas producting rate can be adjusted in time, recovering air water
Interface；If arriving first flex point, it is necessary to close stingy mouth immediately or suspend production, recovering pressure, recovering air water circle
Face, and be allowed to balance, i.e. gas is upper, water under, can produce.If reaching second flex point, then gas reservoir gas production
Exhaustion.Consequently, it is possible to the purpose of efficient gas production can be reached.
Fig. 4 is the curve synoptic diagram that in one embodiment of the invention, carbon isotope of natural gas changes with gas reservoir pressure.Such as Fig. 4
Shown in, curve 301 be in above-mentioned many mouthfuls of the adopted natural gass of producing well one component (such as methane) carbon isotope with
The schematic diagram of gas reservoir pressure change.The first flex point 302 and Second Inflexion Point 303, the first flex point 302 is there is on curve 301
Production status change reversible, the change of the production status of Second Inflexion Point 303 is irreversible.Wherein, in the first flex point 302
Before, natural gas production status is steady, and in natural gas, the carbon isotope value change of methane is slowly, the most such as can more than
State first rate gas production；When in natural gas, the carbon isotope value of methane reaches the first flex point 302, Water Soluble Gas starts to release
Putting, natural gas is changed into gaseous mixture by free gas, and in natural gas, the carbon isotope value of methane quickly increases (methane
Carbon isotope value be negative value)；Between the first flex point 302 and Second Inflexion Point 303, in natural gas, methane is free
Gas and the gaseous mixture of Water Soluble Gas, the carbon isotope value Rapid Variable Design of methane in natural gas；When in natural gas, the carbon of methane is same
When position element value reaches Second Inflexion Point 303, natural gas is changed into Water Soluble Gas by gaseous mixture, the thorough exhaustion of free gas；
After Second Inflexion Point 303, gas reservoir is not had by water logging, slowly produces Water Soluble Gas, until gas reservoir finally exhaustion completely.Bent
Line 304 is that the carbon isotope value of methane in natural gas regulates producing well gas producing technology day after tomorrow when the first flex point 302
The schematic diagram that so in gas, the carbon isotope value of methane changes with gas reservoir pressure.Correlation curve 304 and curve 303 understand,
After the method utilizing the present invention adjusts the gas producing technology of producing well, the time of the steady production status of natural gas is extended,
The recovery ratio of natural gas is improved, and the Production Life of gas reservoir is extended.
The determination method of the gas producing technology of the present invention, is finding carbon isotope of natural gas and Natural Gas Type variation relation
On the basis of, adjust the gas producing technology of producing well according to the carbon isotope value of the adopted natural gas of producing well, it is possible to realize quickly
The node of Accurate Prediction producing well gas production state, the accordingly gas producing technology of timely Reasonable adjustment producing well, it is possible to solve existing
There is the technology can not the drawback of look-ahead producing well gas producing technology, it is possible to significantly improve gas recovery velocity and the gas reservoir of producing well
Development efficiency.
Based on the inventive concept identical with the determination method of the gas producing technology shown in Fig. 1, the embodiment of the present application additionally provides
The determination device of a kind of gas producing technology, as example below is above-mentioned.Owing to the determination device of this gas producing technology solves problem
Principle similar to the determination method of gas producing technology, therefore the enforcement of the determination device of this gas producing technology may refer to gas production
The enforcement of the determination method of technique, repeats no more in place of repetition.
Fig. 5 is the structural representation of the determination device of the gas producing technology of one embodiment of the invention.As it is shown in figure 5, this
The determination device of the gas producing technology of bright embodiment, it may include the first carbon isotope determination unit 210, carbon isotope and gas
Hide pressure dependence signal generating unit 220, Natural Gas Type determine unit the 230, second carbon isotope determination unit 240 and
Gas producing technology adjustment unit 250, above-mentioned each unit is linked in sequence.
First carbon isotope determination unit 210 is used for measuring many mouthfuls of producing wells in multiple production period from the adopted sky of gas reservoir
So carbon isotopic data of gas.
Carbon isotope and gas reservoir pressure dependence signal generating unit 220 are for according to above-mentioned carbon isotopic data and above-mentioned gas reservoir
Pressure data, matching obtains the carbon isotope of natural gas variation relation with the pressure of above-mentioned gas reservoir.
Natural Gas Type determines according to above-mentioned variation relation, unit 230 is for determining that above-mentioned many mouthfuls of producing wells are adopted natural
The type of gas.
Second carbon isotope determination unit 240 is for measuring the carbon isotope value of an adopted natural gas of producing well to be adjusted.
Gas producing technology adjustment unit 250 is for adjusting according to above-mentioned variation relation, the above-mentioned type and above-mentioned carbon isotope value
The gas producing technology of above-mentioned producing well to be adjusted.
In above-mentioned first carbon isotope determination unit 210, multiple production period can be to decline from initial stage of production to gas production
Exhaust the one or more production period during a large amount of water outlet, it is preferred that from initial stage of production until gas production exhaustion measures greatly
Water, consequently, it is possible to carbon isotopic data is abundant comprehensively, is conducive to improving the accuracy adjusting collection technology.Many mouthfuls of lifes
Produce well and could be for exploiting the gas well of same gas reservoir.This carbon isotopic data can be obtained by multiple method.Adopted
Can comprise various ingredients in natural gas, this carbon isotopic data can include the carbon isotope of the various ingredients of natural gas
Value.In one embodiment, the producing well of optional more than three mouthfuls, produce tracking in period in difference and carry out natural gas sampling,
And each sample point (time point) can be obtained Production development data and pressure data.
In above-mentioned carbon isotope with gas reservoir pressure dependence signal generating unit 220, carbon isotope of natural gas is with above-mentioned gas reservoir
The variation relation of pressure can be the carbon isotope of natural gas change formula with recovery percent.Inventor finds natural gas carbon
Isotope is with in the variation relation of the pressure of gas reservoir, and carbon isotope of natural gas can have certain change rule with recovery percent
The carbon isotope obvious difference of both rule, particularly free gas and Water Soluble Gas, different regions carbon isotope of natural gas also may be used
There is different.Above-mentioned variation relation can reflect the change of recovery percent.
In one embodiment, inventor finds that above-mentioned difference can be relevant with the Organic matter type of hydrocarbon source rock and evolution level,
One area or series of strata need creation data and the carbon isotopic data of the producing well according to more than 3 mouthfuls, set up plan
Close formula, the carbon isotope of natural gas change with recovery percent can be reflected more accurately.It is preferred that described many mouthfuls of lifes
Produce well the most normally to produce, until dropping to a large amount of water outlet under yield, thus, it is possible to represent gas reservoir well natural
Gas basic feature.
In above-mentioned Natural Gas Type determines unit 230, the type of adopted natural gas can refer to, natural gas be free gas,
Water Soluble Gas or the two gaseous mixture.According to carbon isotope of natural gas with the variation relation of recovery percent, it may be determined that extraction
Natural gas is free gas or Water Soluble Gas or the two mixing.In one embodiment, can get according to above-mentioned variation relation
The carbon isotope cut off value of both free gas and Water Soluble Gas, this cut off value can be the exhaustion value of free gas, now water
Molten gas gradually output, i.e. critical state, the type of natural gas can be determined according to this cut off value.
In above-mentioned second carbon isotope determination unit 240, the mensuration of carbon isotope value analyzes method can be with above-mentioned first
It is identical that the mensuration of the carbon isotopic data in carbon isotope determination unit 210 analyzes method.
In above-mentioned gas producing technology adjustment unit 250, according to above-mentioned variation relation and the above-mentioned type it is known that natural gas
Type is with the situation of change of carbon isotopic data, in conjunction with the carbon isotope value of the adopted natural gas of producing well to be adjusted, permissible
Know the type of the adopted natural gas of producing well to be adjusted, thus be tracked by natural gas adopted to producing well to be adjusted
Sampling, and obtain corresponding carbon isotope value, the type of this adopted natural gas of producing well to be adjusted can be monitored, thus
Reach the purpose of the gas producing technology of this producing well to be adjusted of Reasonable adjustment.
In one embodiment, above-mentioned first carbon isotope determination unit 210 can include that the first carbon isotope measures module
211。
First carbon isotope measure module 211 be used for measuring above-mentioned many mouthfuls of producing wells by initial stage of production to the water outlet phase from
State the carbon isotopic data of each component of the adopted natural gas of gas reservoir.
Measure in module 211 at above-mentioned first carbon isotope, by initial stage of production to the water outlet phase can include multiple production time
Phase, such as the initial stage of production of can including, during stable yields, drop antenatal, fall produce time, fall puerperal, water outlet etc..Gas Exploitation
The data that sample obtains are the most intensive more good, can obtain more rich carbon isotopic data, are conducive to obtaining more degree of accuracy more
High carbon isotope of natural gas is with the variation relation of the pressure of above-mentioned gas reservoir.
In one embodiment, adopted natural gas can use anticorrosion steel cylinder collection, and steel pressure of the inside of a bottle is positively retained at 1～2 MPa,
Volume can be 1 liter.Natural gas sample is carried out carbon isotope and is measured analysis, and analysis project can include Various Components In Natural Gas
The carbon isotope of carbon isotope, such as methane gas.
In one embodiment, the determining instrument of employing can be Thermo Delta V Advantage, and analysis precision can be
±0.1‰。
In one embodiment, the carbon isotope of different producing wells and different gas component can together be used for matching and obtain
Carbon isotope of natural gas is with the variation relation of the pressure of above-mentioned gas reservoir.
Fig. 6 is the structural representation of the determination device of the gas producing technology of another embodiment of the present invention.As shown in Figure 6, figure
The determination device of the gas producing technology shown in 1 may also include that carbon isotope and gas reservoir pressure dependence amending unit 260, even
It is connected to carbon isotope and gas reservoir pressure dependence signal generating unit 220 and Natural Gas Type determines between unit 230.
Carbon isotope and gas reservoir pressure dependence amending unit 260 are for utilizing the creation data of above-mentioned many mouthfuls of producing wells to repair
The most above-mentioned variation relation.
In above-mentioned carbon isotope with gas reservoir pressure dependence amending unit 260, the creation data in conjunction with producing well can obtain
Know that carbon isotope of natural gas that carbon isotope and gas reservoir pressure dependence signal generating unit 220 matching obtain is with above-mentioned gas reservoir
Whether the variation relation of pressure tallies with the actual situation, and can improve the correctness of above-mentioned variation relation with this.
In one embodiment, above-mentioned carbon isotope and gas reservoir pressure dependence amending unit 260 can be additionally used in execution: above-mentioned
Creation data includes: instantaneous gas production data and oil pressure data.
In the present embodiment, instantaneous gas production data and oil pressure data can be obtained by multiple method, such as, each
Sample point can obtain Production development data and/or pressure data, and these data, can be according to Instruments in Well Site dish when sampling
The data shown at that time are registered.
In one embodiment, above-mentioned Natural Gas Type determines that unit 230 can include that Natural Gas Type determines module 231.
Natural Gas Type determines according to above-mentioned variation relation, module 231 is for determining that above-mentioned many mouthfuls of producing wells are adopted natural
Gas is become the first carbon isotope cut off value of gaseous mixture from free gas and is become the second carbon coordination of Water Soluble Gas from gaseous mixture
Element cut off value.
In above-mentioned Natural Gas Type determines module 231, can be according to carbon isotope of natural gas with recovery percent (pressure change
Change reflection) change, determine two flex points, it is free gas or water that the two flex point can represent the natural gas of extraction
Molten gas, can be gaseous mixture between flex point, can be as the critical time window adjusting gas producing technology.The two flex point, also
Being exactly two critical point, first critical point can represent in free gas and start to be mixed into Water Soluble Gas, reflect possibility
Water breakthrough occurs, and gas reservoir may be by the risk of water logging, can be as the prime time window taking technological measure.Second is faced
Boundary's point value can represent free gas exploitation exhaustion, and gas reservoir is thoroughly by water logging.
In one embodiment, above-mentioned gas producing technology adjustment unit 250 can include gas producing technology adjusting module 251.
Gas producing technology adjusting module 251 for the carbon isotope value according to above-mentioned the adopted natural gas of producing well to be adjusted and
Above-mentioned first carbon isotope cut off value and above-mentioned second carbon isotope cut off value comparative result therebetween, adjust above-mentioned
The gas producing technology of producing well to be adjusted.
In above-mentioned gas producing technology adjusting module 251, above-mentioned first carbon isotope cut off value can be to be become from free gas
Gaseous mixture flex point, above-mentioned second carbon isotope cut off value can be the flex point being become Water Soluble Gas from gaseous mixture, according to
The carbon isotope value of above-mentioned the adopted natural gas of producing well to be adjusted is relative to the position of the two flex point, it can be determined that wait to adjust
The type of the adopted natural gas of whole producing well, and then corresponding collection technology can be used, to reach many gas production and fast gas production
The purpose of efficient gas production.
Fig. 7 is the structural representation of gas producing technology adjusting module in one embodiment of the invention.Adopt as it is shown in fig. 7, above-mentioned
Gas technique adjustment module 251 comprises the steps that the first judge module 2511, first rate adjustment module 2512, second sentences
Disconnected module 2513 and the second rate adaptation module 2514, above-mentioned each sequence of modules connects.
First judge module 2511 is for judging that the carbon isotope value of above-mentioned the adopted natural gas of producing well to be adjusted is the least
Set more than first in above-mentioned first carbon isotope cut off value and with the absolute value of the difference of above-mentioned first carbon isotope cut off value
Definite value.
If so, first rate adjustment module 2512 for adjusting above-mentioned producing well to be adjusted with first rate gas production.
Second judge module 2513 is for if it is not, determine whether that the carbon of above-mentioned the adopted natural gas of producing well to be adjusted is same
Whether position element value is less than above-mentioned second carbon isotope cut off value and absolute with the difference of above-mentioned second carbon isotope cut off value
Value is more than the second setting value.
If so, second rate adaptation module 2514 for adjusting above-mentioned producing well to be adjusted with the second speed gas production；Its
In, above-mentioned first rate is more than above-mentioned second speed.
In one embodiment, rational gas production mode can be adjusted according to the change of individual well carbon isotope of natural gas or takes
Engineering measure.Specifically, such as, the natural gas sample for some gas reservoir is acquired, and can analyze carbon coordination
Element, it is judged that its distance free gas gathers the approximate time point of exhaustion, with timely adjusting process measure.In one embodiment,
First flex point of distance farther out, can strengthen gas producting rate；If closed on, gas producting rate can be adjusted in time, recovering air water
Interface；If arriving first flex point, it is necessary to close stingy mouth immediately or suspend production, recovering pressure, recovering air water circle
Face, and be allowed to balance, i.e. gas is upper, water under, can produce.If reaching second flex point, then gas reservoir gas production
Exhaustion.Consequently, it is possible to the purpose of efficient gas production can be reached.
The determination device of the gas producing technology of the present invention, is finding carbon isotope of natural gas and Natural Gas Type variation relation
On the basis of, adjust the gas producing technology of producing well according to the carbon isotope value of the adopted natural gas of producing well, it is possible to realize quickly
The node of Accurate Prediction producing well gas production state, the accordingly gas producing technology of timely Reasonable adjustment producing well, it is possible to solve existing
There is the technology can not the drawback of look-ahead producing well gas producing technology, it is possible to significantly improve gas recovery velocity and the gas reservoir of producing well
Development efficiency.
The determination method and device of the gas producing technology of the present invention, creatively utilizes carbon isotope of natural gas change to determine gas
Hide the uniqueness factor of development technology, by measuring natural gas pool exploitation different times carbon isotope of natural gas, set up sky
So gas carbon isotope is with the variation relation formula of recovery percent, public with the change of recovery percent according to carbon isotope of natural gas
Formula, determines that the natural gas of extraction is free gas or Water Soluble Gas or the gaseous mixture of the two, with this, it is possible to quickly adjust
Gas producing technology and determine mining type, and adjust the most supporting engineering measure in time, it is greatly improved recovery ratio, it is to avoid
Gas reservoir is by water logging such that it is able to reach many gas production, the purpose of fast gas production, it is possible to reduce engineering time such that it is able to joint
About cost of exploration & development, it is achieved efficiently scale development.Fill up current natural gas exploration and development industry and quickly determine gas production
Mode and quickly determine the blank of technological measure.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or computer journey
Sequence product.Therefore, the present invention can use complete hardware embodiment, complete software implementation or combine software and hardware
The form of the embodiment of aspect.And, the present invention can use and wherein include computer available programs one or more
The computer-usable storage medium (including but not limited to disk memory, CD-ROM, optical memory etc.) of code
The form of the computer program of upper enforcement.
The present invention is with reference to method, equipment (system) and the stream of computer program according to embodiments of the present invention
Journey figure and/or block diagram describe.It should be understood that can be by computer program instructions flowchart and/or block diagram
Flow process in each flow process and/or square frame and flow chart and/or block diagram and/or the combination of square frame.These can be provided
Computer program instructions processes to general purpose computer, special-purpose computer, Embedded Processor or other programmable datas and sets
Standby processor is to produce a machine so that held by the processor of computer or other programmable data processing device
The instruction of row produces for realizing one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple side
The device of the function specified in frame.
These computer program instructions may be alternatively stored in and computer or other programmable data processing device can be guided with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in this computer-readable memory produces bag
Including the manufacture of command device, this command device realizes at one flow process of flow chart or multiple flow process and/or block diagram one
The function specified in individual square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device so that at meter
On calculation machine or other programmable devices, execution sequence of operations step is to produce computer implemented process, thus is calculating
The instruction performed on machine or other programmable devices provide for realizing in one flow process of flow chart or multiple flow process and/or
The step of the function specified in one square frame of block diagram or multiple square frame.
In the description of this specification, reference term " embodiment ", " specific embodiment ", " some
Embodiment ", " such as ", " example ", the description of " concrete example " or " some examples " etc. mean to combine
Specific features, structure, material or the feature that this embodiment or example describe is contained at least one enforcement of the present invention
In example or example.In this manual, the schematic representation to above-mentioned term be not necessarily referring to identical embodiment or
Example.And, the specific features of description, structure, material or feature can be in any one or more embodiments
Or example combines in an appropriate manner.
Particular embodiments described above, has been carried out the purpose of the present invention, technical scheme and beneficial effect the most in detail
Describe in detail bright, be it should be understood that the specific embodiment that the foregoing is only the present invention, be not used to limit this
Bright protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done,
Should be included within the scope of the present invention.
Claims (14)
1. the determination method of a gas producing technology, it is characterised in that including:
Measure many mouthfuls of producing wells in multiple production period from the carbon isotopic data of the adopted natural gas of gas reservoir；
According to described carbon isotopic data and the pressure data of described gas reservoir, matching obtains carbon isotope of natural gas with described
The variation relation of the pressure of gas reservoir；
The type of described many mouthfuls of the adopted natural gass of producing well is determined according to described variation relation；
Measure the carbon isotope value of an adopted natural gas of producing well to be adjusted；
The gasworker of described producing well to be adjusted is adjusted according to described variation relation, described type and described carbon isotope value
Skill.
2. the determination method of gas producing technology as claimed in claim 1, it is characterised in that measure many mouthfuls of producing wells and exist
Multiple production period from the carbon isotopic data of the adopted natural gas of gas reservoir, including:
Measure described many mouthfuls of producing wells by initial stage of production to the water outlet phase from the carbon of each component of the adopted natural gas of described gas reservoir
Isotopic data.
3. the determination method of gas producing technology as claimed in claim 1, it is characterised in that also include:
Utilize variation relation described in the creation data correction of described many mouthfuls of producing wells.
4. the determination method of gas producing technology as claimed in claim 3, it is characterised in that described creation data includes:
Instantaneous gas production data and oil pressure data.
5. the determination method of gas producing technology as claimed in claim 1, it is characterised in that according to described variation relation
Determine the type of described many mouthfuls of the adopted natural gass of producing well, including:
Determine that described many mouthfuls of the adopted natural gass of producing well are become the first of gaseous mixture from free gas according to described variation relation
Carbon isotope cut off value and become the second carbon isotope cut off value of Water Soluble Gas from gaseous mixture.
6. the determination method of gas producing technology as claimed in claim 5, it is characterised in that according to described variation relation,
Described type and described carbon isotope value adjust the gas producing technology of described producing well to be adjusted, including:
Carbon isotope value according to described the adopted natural gas of producing well to be adjusted and described first carbon isotope cut off value and
Described second carbon isotope cut off value comparative result therebetween, adjusts the gas producing technology of described producing well to be adjusted.
7. the determination method of gas producing technology as claimed in claim 6, it is characterised in that according to described life to be adjusted
Produce carbon isotope value and described first carbon isotope cut off value and the described second carbon isotope boundary of the adopted natural gas of well
Value comparative result therebetween, adjusts the gas producing technology of described producing well to be adjusted, including:
Judge whether the carbon isotope value of described the adopted natural gas of producing well to be adjusted divides less than described first carbon isotope
Dividing value and the absolute value with the difference of described first carbon isotope cut off value are more than the first setting value；
If so, described producing well to be adjusted is adjusted with first rate gas production；
If it is not, determine whether that whether the carbon isotope value of described the adopted natural gas of producing well to be adjusted is less than described second
Carbon isotope cut off value and the absolute value with the difference of described second carbon isotope cut off value are more than the second setting value；
If so, described producing well to be adjusted is adjusted with the second speed gas production；
Wherein, described first rate is more than described second speed.
8. the determination device of a gas producing technology, it is characterised in that including:
First carbon isotope determination unit, is used for measuring many mouthfuls of producing wells in multiple production period from the adopted natural gas of gas reservoir
Carbon isotopic data；
Carbon isotope and gas reservoir pressure dependence signal generating unit, for according to described carbon isotopic data and the pressure of described gas reservoir
Force data, matching obtains the carbon isotope of natural gas variation relation with the pressure of described gas reservoir；
Natural Gas Type determines unit, for determining described many mouthfuls of the adopted natural gass of producing well according to described variation relation
Type；
Second carbon isotope determination unit, for measuring the carbon isotope value of an adopted natural gas of producing well to be adjusted；
Gas producing technology adjustment unit, for adjusting institute according to described variation relation, described type and described carbon isotope value
State the gas producing technology of producing well to be adjusted.
9. the determination device of gas producing technology as claimed in claim 8, it is characterised in that described first carbon isotope
Determination unit includes:
First carbon isotope measures module, be used for measuring described many mouthfuls of producing wells by initial stage of production to the water outlet phase from described gas
Hide the carbon isotopic data of each component of adopted natural gas.
10. the determination device of gas producing technology as claimed in claim 8, it is characterised in that also include:
Carbon isotope and gas reservoir pressure dependence amending unit, for utilizing the creation data correction institute of described many mouthfuls of producing wells
State variation relation.
The determination device of 11. gas producing technologies as claimed in claim 10, it is characterised in that described carbon isotope with
Gas reservoir pressure dependence amending unit is additionally operable to perform:
Described creation data includes: instantaneous gas production data and oil pressure data.
The determination device of 12. gas producing technologies as claimed in claim 8, it is characterised in that described Natural Gas Type is true
Cell includes:
Natural Gas Type determines module, for according to described variation relation determine described many mouthfuls of the adopted natural gass of producing well by
Free gas becomes the first carbon isotope cut off value of gaseous mixture and is become the second carbon isotope of Water Soluble Gas from gaseous mixture and divide
Dividing value.
The determination device of 13. gas producing technologies as claimed in claim 12, it is characterised in that described gas producing technology is adjusted
Whole unit includes:
Gas producing technology adjusting module, is used for the carbon isotope value according to described the adopted natural gas of producing well to be adjusted with described
First carbon isotope cut off value and described second carbon isotope cut off value comparative result therebetween, wait to adjust described in adjustment
The gas producing technology of whole producing well.
The determination device of 14. gas producing technologies as claimed in claim 13, it is characterised in that described gas producing technology is adjusted
Mould preparation block includes:
First judge module, for judging that whether the carbon isotope value of described the adopted natural gas of producing well to be adjusted is less than institute
State the first carbon isotope cut off value and the absolute value with the difference of described first carbon isotope cut off value is more than the first setting value；
If so, first rate adjustment module, for adjusting described producing well to be adjusted with first rate gas production；
Second judge module, for if it is not, determine whether the carbon isotope of described the adopted natural gas of producing well to be adjusted
Whether value is less than described second carbon isotope cut off value and big with the absolute value of the difference of described second carbon isotope cut off value
In the second setting value；
If so, second rate adaptation module, for adjusting described producing well to be adjusted with the second speed gas production；Wherein,
Described first rate is more than described second speed.
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