CN107218969B - A kind of phase of determining oil-gas migration time, the time, power and direction method - Google Patents
A kind of phase of determining oil-gas migration time, the time, power and direction method Download PDFInfo
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Abstract
The present invention relates to a kind of phases of determining oil-gas migration time, time, the method of power and direction, pass through the in-situ test data of the oxygen isotope and trace element of oil inclusions secondary quartz cavity wall, calculate the formation temperature of oil inclusions and ancient water flooding oxygen isotope, determine the phase time and time of oil-gas migration, and the connectivity of the ancient water flooding oxygen isotope of application and oil inclusions secondary quartz cavity wall oxygen isotope and micro- oil gas migration period reservoir, and then form temperature by oil inclusions, phasor and isochor obtain paleopressure when oil-gas migration, in conjunction with connected sandbody, hydrocarbon source rock and construction data, disclose power and the direction of oil-gas migration.The present invention is computed available various oil-gas migration information, and accuracy is high, applied widely, realization easy to spread by the geochemistry in-situ test of inclusion enclave secondary quartz cavity wall.
Description
Technical field
The invention belongs to petroleum geology exploration technical fields, the especially geochemical method of petroleum distribution prediction, specifically
Be related to a kind of phase of determining oil-gas migration time, the time, power and direction method.
Background technology
Phase time, time, power and the direction of oil-gas migration are the important informations needed for oil-gas exploration.About the Migration phase
It is secondary, the test datas such as year are mainly determined by saline inclusion homogenization temperature, illite in the prior art, infer oil-gas migration indirectly
Phase time.Its foundation is after oil gas injects reservoir, to prevent the growth of mineral.The time that these mineral growths are stagnated is taken as oil
Gas filling, migration phase.In fact, the reason of causing mineral growth and stagnating is other than hydrocarbon charge, also pH value and mineral are given birth to
Long required ion.If the condition of these mineral growths cannot be satisfied, mineral would not be grown.Therefore, according to secondary
Migration (filling) phase time that the growth retardation situation of mineral infers oil gas, there are larger multi-solutions.Studies have shown that oil-gas migration
And its maturity reflection of the quartzy oil inclusions in phase time available clastic rock, but utilize the maturity of oil inclusions can only be
Hydrocarbon source rock nearby combine bury-thermal evolution history determines time of hydrocarbon charge, restricted application.
If the secondary quartz around oil inclusions, i.e. secondary quartz cavity wall can be utilized, the formation of oil inclusions is obtained
Temperature can not only disclose phase time of oil-gas migration, but also the area near hydrocarbon source rock and far from hydrocarbon source rock is in combination with burying
History determines the time of oil-gas migration.Oil inclusions in quartz are formed in the growth course of secondary quartz.Secondary quartz is also known as stone
English cement.Paleotemperature when secondary quartz formation, can be determined by following OXYGEN ISOTOPE FRACTIONATION equation：
δ18OQuartz=δ18OWater+3.24×106×T-2-3.31 (1)
In formula, δ18OWaterRepresent quartzy oil inclusions and saline inclusion pair or the independent oil inclusions of quartz or secondary quartz shape
At when ancient water flooding oxygen isotope ratio (‰)；Corresponding δ18OQuartzFor the secondary stone of oil inclusions and saline inclusion pair
The oxygen isotope ratio (‰) of the secondary quartz cavity wall or secondary quartz of English cavity wall or independent oil inclusions；Corresponding T is stone
Paleotemperature (K) when English oil inclusions and saline inclusion pair or the independent oil inclusions of quartz or secondary quartz formation, abbreviation shape
At temperature.
According to formula (1), if it is known that the secondary quartz cavity wall oxygen isotope ratio of oil inclusions and ancient stratum water oxygen same position
Plain ratio, so that it may calculate the formation temperature of oil inclusions.On the other hand, if it is known that the oxygen of oil inclusions secondary quartz cavity walls
The formation temperature of isotopic ratio and oil inclusions, so that it may calculate ancient water flooding oxygen isotope ratio.Therefore, it is wrapped up by oil
The in-situ test of secondary quartz around body establishes the side of seeking that oil inclusions form temperature or ancient water flooding oxygen isotope ratio
Method, so that it may which phase time and time to disclose oil-gas migration open up a new approach.
In-situ test is carried out to the secondary quartz cavity wall of saline inclusion and oil inclusions, needs very high spatial discrimination
Rate.According to the research of (2009) Zhang et al., the secondary quartz in clastic rock is often with thready pulse in quartz secondary side and quartz particles
Form occur, the usually only several microns of width on more phase quartz secondaries side and quartz stringer are even less than 1 micron.Quartz
In oil inclusions and saline inclusion be respectively positioned among these quartz secondary sides and quartz stringer.Girard et al.
(2001) oxygen isotope of larger quartz was once tested with SIMS (secondary ion probe), and combined the saline inclusion in quartz
Homogenization temperature estimated ancient water flooding oxygen isotope.But the spatial resolution of SIMS can only achieve 3 microns~5 microns, no
The oxygen isotope of most of secondary quartzs in clastic rock can be tested, can not secondary test by stages, most of oil can not be tested
The secondary quartz cavity wall of inclusion enclave, it is therefore desirable to introduce the higher nanoparticle probe (NanoSIMS) of resolution ratio and carry out survey in situ
Examination.
On the other hand, the homogenization temperature of saline inclusion is not the formation temperature of saline inclusion, according to saline inclusion
The ancient water flooding oxygen isotope that homogenization temperature is sought certainly exists deviation.Using the oil inclusions and saline inclusion pair of symbiosis,
It is calculated by phasor and isochor simulation, the formation temperature and pressure of oil inclusions and saline inclusion pair can be obtained.But
Most oil inclusions are often individually present, and are not occurred in pairs with saline inclusion.Due to the oil inclusions and salt of symbiosis
Water inclusion enclave is difficult to promote to less using the method that this inclusion enclave forms temperature to acquisition.Someone establishes in quartz
Relationship between aluminium content and the formation temperature of quartz.But, it has been found that the formation temperature and aluminium of secondary quartz in clastic rock
The correlation of content is not notable, needs to establish the method that new estimation oil inclusions form temperature.
Paleopressure during oil-gas migration is analyzing oil and gas migration agent and the important parameter in direction.Oil gas mainly by
Pressure and buoyancy-driven and migrate.Typical pressure-driven shows as abnormal high pressure；For typical buoyancy-driven, fluid
Pressure is then hydrostatic pressure.Palaeo-_fluid potential or paleopressure coefficient are the important parameters analyzed migration agent, judge migration direction.Such as
It is preceding described, using the oil inclusions and saline inclusion pair of symbiosis, paleopressure, also known as trapping pressure can be obtained.Similarly,
Since the oil inclusions and saline inclusion of symbiosis are to less, the method for obtaining paleopressure is difficult to using this inclusion enclave
It promotes.If the formation temperature of independent oil inclusions can be solved, can be obtained by independent oil inclusions phasor and isochor
The trapping pressure data of a large amount of independent oil inclusions establish important foundation to disclose migration dynamic with direction.
When application paleopressure discloses hydrocarbon migration direction, it is also necessary to judge the connectivity of reservoir.If reservoir is not
Connection, even if there are pressure difference, oil gas will not migrate along reservoir.In the exploration phase, the connectivity of reservoir is judged, still
Lack effective parameter.Ancient water flooding oxygen isotope, secondary quartz oxygen isotope and trace element have with the property of fluid, source
It closes.If reservoir is connection, they have similar feature in connected sandbody, whereas if reservoir is not connected to, fluidity
There may be larger difference, ancient water flooding oxygen isotope, secondary quartz oxygen isotope and trace element also have larger for matter, source
It is different.Therefore, the ancient water flooding oxygen isotope during oil-gas migration, oil inclusions secondary quartz cavity wall oxygen isotope and micro member
Element can be used as the important parameter of reservoir communication during oil gas migration.
In short, the formation temperature of oil inclusions or ancient water flooding oxygen isotope, the same position of oil inclusions secondary quartz cavity wall oxygen
Element and trace element are phase time, time, power and the important parameter of direction and reservoir communication for disclosing oil-gas migration.Due to
Shortage can obtain a large amount of oil inclusions and form temperature or ancient water flooding oxygen isotope data, oil inclusions secondary quartz cavity wall
The method of oxygen isotope and trace element is still difficult to phase time, time, power and side that effective, system discloses oil-gas migration at present
To and reservoir connectivity.
Invention content
Present invention aims at introduce nanoparticle probe to the oxygen isotope of the secondary quartz cavity wall of inclusion enclave and micro
Element carries out in-situ test, establishes the pass that oil inclusions form temperature or ancient water flooding oxygen isotope and micro-zone in situ test data
System proposes a kind of secondary phase of determining oil-gas migration, time, power and the method for direction and reservoir communication.
Nanoparticle probe technique (NanoSIMS) is introduced this field by the present invention, is wrapped to quartz cement especially oil
Wrap up in body secondary quartz cavity wall oxygen isotope and trace element carry out in-situ test, establish oil inclusions formed temperature with it is a variety of micro-
The relationship of secondary element determines the formation temperature of quartz cement and oil inclusions and by same using the trace element data of test
The plain Fractionation Equations in position seek ancient water flooding oxygen isotope；In order to obtain relatively reliable formation temperature, ancient water flooding has been also set up
The relationship of oxygen isotope and secondary quartz oxygen isotope and trace element determines ancient ground using the isotope and trace element of test
Layer water oxygen isotope and the formation temperature that oil inclusions are determined by isotope fractionation equation；In turn, it is formed using oil inclusions
Temperature histogram determines the phase time of oil-gas migration, and the time of oil-gas migration is determined in conjunction with buried history；Utilize the ancient same position of stratum water oxygen
Element, oil inclusions secondary quartz oxygen isotope and trace element judge reservoir communication；Then, temperature is formed according to oil inclusions
The paleopressure in oil-gas migration period, and then comprehensive paleopressure, reservoir communication, hydrocarbon source rock and construction are determined with phasor
Data discloses power and the direction of oil-gas migration.
It is quartzy often to contain the trace elements such as Li, Na, K, Al, Mg, Ca, Cr, Cu, Fe.These elements are in ancient water flooding
Saturated concentration is the function of temperature and pressure.When secondary quartz is formed, these elements point alternate with quartz two in water flooding
Distribution coefficient is also the function of temperature and pressure.Since the compressibility of liquid and solid is smaller, micro- saturated concentration and
It is in the function that water and quartzy two alternate distribution coefficients are mainly temperature.Clastic rock contains a large amount of detrital feldspar, water flooding
Corrosion to feldspar can make aluminium element reach saturation state, therefore meeting between the formed temperature of content of aluminium in secondary quartz
There are certain correlation (Dennen et al., 1970).But the aluminium in ancient water flooding is not in all cases all
Saturation state can be reached, we have discovered that only leaning on the aluminium content in quartz that cannot reflect to form temperature well.In fact, broken
It considers to be worth doing and also contains a large amount of carbonate mineral in rock, water flooding can make calcium and magnesium reach saturation state the corrosion of carbonate mineral.
Accordingly, following formula (functional relation of the formation temperature and various trace elements content of secondary quartz) is derived：
In formula, T represents the shape of quartzy oil inclusions and saline inclusion pair or the independent oil inclusions of quartz or secondary quartz
At temperature (K)；N is the number of tested micro- type；Corresponding Ci(i=1,2 ..., n) it is oil inclusions and salt
I-th kind of trace element in the secondary quartz cavity wall of water inclusion enclave pair or the secondary quartz cavity wall or secondary quartz of independent oil inclusions
Content (μ g/g).These elements include at least aluminium, calcium and magnesium.ai(i=0,1,2 ..., n) it is constant.Actual data analysis knot
Fruit shows that applying equation (2) carries out the related coefficient that multiple regression or stepwise regression analysis obtain, far above temperature and aluminium element it
Between related coefficient (referring to embodiment).
But formula (2) cannot ensure that highly effective regression equation can be established under any circumstance.In fact, in addition to
There is outside the Pass micro- content with temperature, the fractionation of oxygen isotope is also related with temperature (referring to formula in quartz in secondary quartz
(1)), both comprehensive relationships, establish following equation：
In formula, b0、b1、kiAnd lij(i=1,2 ..., n；J=i, i+1 ..., n) it is constant；The meaning of variable and formula (1)
It is identical with the meaning of variable in formula (2).
Formula (3) by means of isotope fractionation equation, therefore under normal circumstances its correlation can than formula (2) correlation more
Significantly.
In order to achieve the object of the present invention, present invention employs following scheme：
A kind of phase of determining oil-gas migration time, the time, power and direction method, which is characterized in that include the following steps：
(1) oil inclusions and saline inclusion pair of the independent oil inclusions and symbiosis in clastic rock quartz are searched；
(2) oil inclusions of the oil inclusions and saline inclusion centering of the independent oil inclusions and symbiosis that test is found
Homogenization temperature, gas liquid ratio, and estimate or test oil ingredient therein, by simulate calculate the phasor for obtaining oil inclusions with etc.
Hold line；Symbiosis saline inclusion homogenization temperature, gaseous component and the salinity for testing oil inclusions, thus to obtain saline inclusion
Phasor and isochor；Using both phasors and isochor, seek oil inclusions with saline inclusion to being formed when temperature with
Pressure；
(3) oil inclusions of independent oil inclusions and symbiosis and saline inclusion that find see place position
Examine, determine independent oil inclusions and symbiosis oil inclusions and saline inclusion to the quartz secondary side at place or secondary quartz
The range of thready pulse, and determine therefrom that the secondary quartz cavity wall of each independent oil inclusions and oil inclusions and saline inclusion pair is surveyed
The position of pilot；
(4) the secondary of each independent oil inclusions of nanoparticle probe test and oil inclusions and saline inclusion pair is applied
Quartzy cavity wall oxygen isotope ratio and micronutrient levels；The nanoparticle probe is assembled with reflected light microscope, is testing
Afterwards, the spatial relationship between microcell test point and corresponding inclusion enclave is examined with polarisation-cathodoluminescence microscope, if secondary quartz
Test point and corresponding inclusion enclave are neighbouring, then it is assumed that the test point was tested is the secondary quartz cavity wall of corresponding inclusion enclave, no
Then, test point test is secondary quartz other parts, need to again be surveyed to the secondary quartz cavity wall of corresponding inclusion enclave
Examination；All data retentions that test is obtained；
(5) oil inclusions and the formation temperature of saline inclusion pair and its oxygen isotope of secondary quartz cavity wall are applied, is led to
Following quartzy OXYGEN ISOTOPE FRACTIONATION equation is crossed, i.e. formula (1) seeks the ancient stratum of oil inclusions and saline inclusion to being formed when
Water oxygen isotope：
δ18OQuartz=δ18OWater+3.24×106×T-2-3.31 (1)
In formula, δ18OWaterRepresent quartzy oil inclusions and saline inclusion pair or the independent oil inclusions of quartz or secondary quartz shape
At when ancient water flooding oxygen isotope ratio, be ‰ here；Corresponding δ18OQuartzFor time of oil inclusions and saline inclusion pair
Raw quartz cavity wall or the secondary quartz cavity wall of independent oil inclusions or the oxygen isotope ratio of secondary quartz, are ‰ here；Relatively
The paleotemperature when T answered is quartzy oil inclusions and saline inclusion pair or the independent oil inclusions of quartz or secondary quartz formation,
Unit is K；
(6) the formation temperature and its secondary quartz cavity wall micronutrient levels of oil inclusions and saline inclusion pair are applied,
With functional form shown in following formula (2), multiple regression analysis or stepwise regression analysis are carried out, a in formula (2) is soughti
(i=0,1,2 ..., n) and related coefficient；
In formula, T represents quartzy oil inclusions and saline inclusion pair or the independent oil inclusions of quartz or secondary quartz is formed
When paleotemperature, n is the number of tested micro- type, corresponding Ci(i=1,2 ..., n) be oil inclusions and
I-th kind in the secondary quartz cavity wall of saline inclusion pair or the secondary quartz cavity wall or secondary quartz of independent oil inclusions is micro
The content (μ g/g) of element, ai(i=0,1,2 ..., n) it is constant；
(7) ancient water flooding oxygen isotope when applying oil inclusions with saline inclusion to being formed and its secondary quartz cavity wall
Oxygen isotope ratio and micronutrient levels are carried out multiple regression or are gradually returned by functional form shown in following formula (3)
Return analysis, the b in solution formula (3)0、b1、kiAnd lijAnd related coefficient；
In formula, b0、b1、kiAnd lij(i=1,2 ..., n；J=i, i+1 ..., n) it is constant, the meaning and formula of variable
(1) identical with the meaning of variable in formula (2)；
(8) if the related coefficient of above-mentioned steps (6) is more than or equal to the related coefficient of above-mentioned steps (7), using independent oil
The regression equation acquired in the micronutrient levels and above-mentioned steps (6) of inclusion enclave secondary quartz cavity wall seeks independent oil inclusions
Formation temperature；Again according to the regression equation acquired in above-mentioned steps (6), with all secondary stones measured in step (4)
English and secondary quartz wall trace element data, calculate the formation temperature of secondary quartz；Above-mentioned steps (6) regression equation is reapplied to ask
The formation temperature and its secondary quartz cavity wall oxygen isotope of the independent oil inclusions taken seek independent oil package by formula (1)
Ancient water flooding oxygen isotope when body formation；
If the related coefficient of above-mentioned steps (6) is less than the related coefficient of above-mentioned steps (7), using in above-mentioned steps (7)
The oxygen isotope ratio and micronutrient levels data of the regression equation and independent oil inclusions secondary quartz cavity wall that acquire, meter
Calculate ancient water flooding oxygen isotope when independent oil inclusions formation；Recycle formula (1) and independent oil inclusions secondary quartz chamber
Ancient water flooding oxygen isotope when the oxygen isotope of wall and the formation of independent oil inclusions, finds out when independent oil inclusions are formed
Paleotemperature；With all secondary quartzs and secondary quartz wall oxygen isotope and trace element data measured in step (4), pass through
The regression equation and formula (1) acquired in above-mentioned steps (7) calculates separately ancient water flooding oxygen isotope when secondary quartz formation
And its form temperature；
(9) it uses the formation temperature data of secondary quartz and all oil inclusions to draw histogram, discloses fossil fluid activity
It is secondary with the phase of oil-gas migration, and combination buried history determines the time of fossil fluid activity and oil-gas migration respectively；
(10) oxygen of ancient water flooding when the independent oil inclusions of application and oil inclusions and saline inclusion are to forming is same
The oxygen isotope and micro member of the secondary quartz cavity wall of position element, independent oil inclusions and oil inclusions and saline inclusion pair
Element judges connectivity of the continuous sand body during oil-gas migration；
(11) according to the formation temperature and its phasor and isochor of independent oil inclusions, when seeking independent oil inclusions formation
Paleopressure, when the oil inclusions and saline inclusion sought using its result data and above-mentioned steps (2) are to forming
Paleopressure data calculate corresponding paleopressure coefficient or fluid potential, using paleopressure coefficient or fluid in conjunction with the buried history
Gesture discloses power and the direction of oil-gas migration in conjunction with the connectivity of reservoir, hydrocarbon source rock and construction data.
Further, in above-mentioned steps (1), the independent oil package in clastic rock quartz is searched using polarisation-fluorescence microscope
Body and the oil inclusions and saline inclusion pair of symbiosis.
Further, in above-mentioned steps (1), for obtain it is reliable as a result, symbiosis oil inclusions and saline inclusion pair
Number is 15 or 15 or more；Needs are studied according to work area geology characteristic and oil-gas migration, the number of independent oil inclusions is
50 or 50 or more.
Further, in above-mentioned steps (3), using cathodoluminescence microscope or electron microscope, to the independent oil packet found
The oil inclusions and saline inclusion for wrapping up in body and symbiosis carry out cathodoluminescence observation to place position, and determine independent oil package
The oil inclusions and saline inclusion of body and symbiosis are to the quartz secondary side at place or the range of secondary quartz thready pulse.
Further, in above-mentioned steps (10), using ancient water flooding oxygen isotope, oil inclusions secondary quartz oxygen isotope and
Trace element judges the connectivity of continuous sand body by the way of same layer comparison between well.
Further, the type of the trace element includes at least aluminium, calcium and magnesium.
Phase of the determination oil-gas migration time, the time, power and direction method have the advantages that：
(1) oxygen isotope and trace element of the invention by nanoparticle probe test inclusion enclave secondary quartz cavity wall,
And go out the oxygen isotope ratio of the temperature and pressure and ancient water flooding when oil inclusions formation using multiple equations.
(2) the ancient water flooding oxygen isotope ratio, secondary quartz oxygen when being formed using the oil inclusions that the present invention obtains are same
The plain ratio in position and micronutrient levels, for oil gas migration when reservoir connectivity provide important evidence.
(3) present invention directly determines the phase time of oil-gas migration using the formation temperature of oil inclusions, and combines buried history, profit
With the time for forming temperature announcement oil-gas migration, paleopressure coefficient or fluid potential and reservoir communication is utilized to disclose each phase time oil
The power and direction that fate is moved.
(4) present invention can get by the geochemical testing of inclusion enclave secondary quartz cavity wall in conjunction with existing test method
A variety of oil-gas migration information such as phase time, time, power and the direction of oil-gas migration, and accuracy is high, it is applied widely, it is easy to
It promotes and realizes.
Description of the drawings
Fig. 1：Stick together the T-P phases of quartzy oil inclusions and saline inclusion pair at 3173.2 meters of 712 well in the embodiment of the present invention
Figure；
Fig. 2：Stick together quartzy oil inclusions and its cavity wall test point schematic diagram at 713 well 3031.7m in the embodiment of the present invention；
Fig. 3 a：The formation temperature and secondary quartz cavity wall of oil inclusions and saline inclusion pair are micro in the embodiment of the present invention
Relational graph between element al；
Fig. 3 b：The formation temperature and secondary quartz cavity wall of oil inclusions and saline inclusion pair is more in the embodiment of the present invention
Relational graph between kind trace element；
Fig. 4：Between the ancient water flooding oxygen isotope differently obtained in the embodiment of the present invention between formation temperature
Relational graph；
Fig. 5：Win the formation temperature of oil inclusions and secondary quartz in the regional dune shape glutenite that sticks together in the embodiment of the present invention
(light gray represents oil inclusions to histogram；Dark grey represents secondary quartz)；
Fig. 6：The victory area that sticks together sticks together 715 well the buried histories in the embodiment of the present invention；
Fig. 7：Win stick together regional husky three times sub- section Diagenetic Facies and Gu water flooding oxygen isotope distribution map in the embodiment of the present invention；
Fig. 8：The independent oil inclusions at 3525.5 meters of 763 well that stick together in the embodiment of the present invention form temperature and T-P phasors；
Fig. 9：In the embodiment of the present invention victory stick together regional dune shape key oil-gas migration phase paleopressure index profile with
Hydrocarbon migration direction.
Specific implementation mode
With reference to the accompanying drawings and embodiments, the present invention will be further described：
Embodiment
The victory of northern zone of Dongying Sag stick together area be Jiyang Depression, The Bohaiwan Basin important oil-producing area.Win the oil gas in the area that sticks together
Petroleum migration path, time, power and direction are the important evidences of announcement area's oil-gas distribution, and for garden basin actic region
Oil-gas exploration have larger enlightenment effect.In 100 more than one piece glutenite samples, have found 15 symbiosis oil inclusions and
Saline inclusion pair.We test the oil inclusions of these inclusion enclave centerings and homogenization temperature, the gas phase hundred of saline inclusion
Divide ratio and component, the phasor and isochor for obtaining oil inclusions and saline inclusion are calculated through simulation, therefrom has read oily packet
The formation temperature and pressure of body and saline inclusion pair are wrapped up in, as shown in Figure 1.
Area's glutenite andesine clast is relatively abundant, and calcite and dolomite cement are relatively developed, aluminium, calcium and magnesium elements
Concentration in water flooding easily reaches saturated concentration.For this purpose, testing oil inclusions and brine package using nanoparticle probes
The content of the secondary quartz cavity wall oxygen isotope of body pair and aluminium, calcium, magnesium.The test point of oil inclusions and its secondary quartz cavity wall is such as
Shown in Fig. 2, left hand view is fluorescence photo in Fig. 2, and right part of flg is cathodoluminescence photo.We use oil inclusions and saline bag first
The formation temperature for wrapping up in body pair and the aluminium content of its secondary quartz cavity wall have carried out regression analysis, are implicitly present between the two certain
Correlation, but related coefficient is very low, as shown in Figure 3a.It being fitted using formula (2), related coefficient square is increased to 0.75,
Its regression equation is：
1/T=2.512 × 10-6lnAl-5.525×10-5lnCa+4.040×10-5lnMg+2.403×10-3 (4)
In formula, T is absolute temperature (K)；Al, Ca, Mg respectively represent the content (μ g/g) of these three elements.
The temperature that Fig. 3 b ordinates represent is the formation temperature sought in oil inclusions and saline inclusion are to phasor, horizontal
The temperature that coordinate represents is calculated by formula (4).Its related coefficient square be more than 0.75, correlation is obviously improved.This shows with more
Kind trace element, which carries out regression analysis, can make up the deficiency of single element.
Temperature and ancient water flooding oxygen isotope, application specifications are formed in order to obtain the higher quartzy oil inclusions of reliability
In formula (3) carry out regression analysis, obtain ancient water flooding oxygen isotope and oil inclusions secondary quartz cavity wall oxygen isotope and
Regression equation between micronutrient levels：
δ18OWater=-74.975+0.7958 δ18OQuartz-9.837lnMg+6.247lnAl+25.862lnCa
+0.3248(lnMg)2+0.04411(lnAl)2-2.453(lnCa)2
-0.3498(lnMg)(lnAl)-1.0651(lnCa)(lnAl)+1.6160(lnMg)(lnCa) (5)
In formula (5), the meaning of each variable is identical as the meaning of variable in formula (1) and formula (4).
The regression equation related coefficient square has reached 0.98 or more, and correlation is extremely notable.Applying equation (5) He Youbao
The oxygen isotope of body secondary quartz cavity wall and the in-situ test of trace element are wrapped up in as a result, calculating Gu ground when oil inclusions formation
Layer water oxygen isotope, and then applying equation (1) has solved the formation temperature of oil inclusions, includes the oil of independent oil inclusions and symbiosis
The formation temperature of inclusion enclave and saline inclusion pair.Right diagram goes out the two kinds of formation of oil inclusions and saline inclusion pair in Fig. 4
The related figure of temperature, abscissa are the formation temperature that formula (5) and formula (1) calculate, and ordinate is identical as the ordinate of Fig. 3 b, related
Coefficient square be more than 0.94, far above only with trace element calculate formation temperature related coefficient (Fig. 3 b).Formula (5) is practical
On based on isotope fractionation equation, be substituted temperature term with trace element, quadratic term therein is conducive to improve correlation.
In turn, applying equation (5) and all secondary quartz oxygen isotopes and micro- in-situ test are as a result, calculate secondary
Ancient water flooding oxygen isotope when raw quartz is formed, is used in combination formula (1) to calculate the formation temperature of secondary quartz.Secondary quartz and oil
The formation temperature histogram of inclusion enclave proves that victory sticks together, and there are the growths of two phase secondary quartzs and two phase hydrocarbon charges in area, such as Fig. 5 institutes
Show, the wherein second phase is crucial fossil fluid activity and timing of oil charge.The formation temperature of oil inclusions is marked in the buried history,
As shown in fig. 6, it can be found that the crucial filling phase of oil gas betide the earth history periods of 5Ma so far.This shows area's oil gas
The time that Migration effect occurs is later, is conducive to preserve oil gas；Reservoir distribution now is with structural configuration to the fortune of oil gas
It moves into and has hidden important control action, can be directly used for the determination or preferred of exploration targets.
Saline inclusion homogenization temperature is less than capture temperature (referring to Fig. 1).In figure 6, if being total to according to oil inclusions
Raw saline inclusion homogenization temperature determines the time of hydrocarbon charge, then can show that hydrocarbon charge betides Guantao group deposition mid-term
Conclusion.In fact, basin has just occurred to settle again at this time, the formation temperature before uplift erosion has not yet been reached in formation temperature,
Hydrocarbon source rock hydrocarbon not yet starts, and hydrocarbon source rock will not arrange hydrocarbon, and oil gas can not possibly injection reservoir.Therefore, equal with saline inclusion
One temperature directly determines the Hydrocarbon Migration And Accumulation time, can draw the wrong conclusion.
The connectivity of reservoir can be substantially judged according to Diagenetic Facies, still, Diagenetic Facies reflection is diagenetic overall result,
It need to prove that oil-gas migration period reservoir is strictly to be connected to fluid flow parameter.Stick together area in victory, we to sand-conglomerate body into
Gone Diagenetic Facies division, as shown in fig. 7, and ancient water flooding oxygen isotope when forming oil inclusions be plotted in figure.Generally,
The alternate ancient water flooding oxygen isotope of different diagenesis differs greatly, and difference is smaller in same Diagenetic Facies, it was demonstrated that husky three times sub- sections are same
Sand-conglomerate body in one Diagenetic Facies is connection during oil-gas migration.
Using the formation temperature of independent oil inclusions, the fluid when having sought independent oil inclusions formation on T-P phasors
Pressure, i.e. trapping pressure, referring to Fig. 8, and the palaeoburial depth determined with the buried history according to temperature is formed, calculate paleopressure
Coefficient.Paleopressure index profile when second phase hydrocarbon charge shows as shown in figure 9, winning the oil for the regional husky three times sub- sections that stick together
For gas using abnormal high pressure as major impetus (pressure coefficient is more than 1.2), the hydrocarbon source rock injection on the south the area wins the area that sticks together.According to basin
Ground Evolutionary History, happiness three acts of mountain tectonic movement (Sun Yongzhuan, 2006) make basin that rapid subsidence have occurred again, until when the towns Ming Hua deposit
Phase, the upper main hydrocarbons of Sha Si reach oil generation peak (Ro>0.7), husky three times hydrocarbon source rocks enter oil threshold.Therefore, exactly structure
It makes movement and the double action of Organic Material Thermal Evolution hydrocarbon has caused the high pressure filling of oil gas.
Illustrative description is carried out to the present invention above in conjunction with attached drawing, it is clear that realization of the invention is not by aforesaid way
Limitation, as long as use the inventive concept and technical scheme of the present invention progress various improvement, or it is not improved will be of the invention
Design and technical solution directly apply to other occasions, be within the scope of the invention.
Claims (6)
1. a kind of phase of determining oil-gas migration time, the time, power and direction method, which is characterized in that include the following steps：
(1) oil inclusions and saline inclusion pair of the independent oil inclusions and symbiosis in clastic rock quartz are searched；
(2) oil inclusions of the oil inclusions and saline inclusion centering for the independent oil inclusions and symbiosis that test is found is equal
One temperature, gas liquid ratio, and estimate or test oil ingredient therein calculate the phasor for obtaining oil inclusions and hold with equal by simulating
Line；Symbiosis saline inclusion homogenization temperature, gaseous component and the salinity for testing oil inclusions, thus to obtain the phase of saline inclusion
Figure and isochor；Using both phasors and isochor, the temperature and pressure of oil inclusions and saline inclusion to being formed when are sought
Power；
(3) oil inclusions of independent oil inclusions and symbiosis and saline inclusion that find observe place position,
Determine that oil inclusions and the saline inclusion of independent oil inclusions and symbiosis are thin to the quartz secondary side at place or secondary quartz
The range of arteries and veins, and determine therefrom that the secondary quartz cavity wall test of each independent oil inclusions and oil inclusions and saline inclusion pair
The position of point；
(4) secondary quartz of each independent oil inclusions of nanoparticle probe test and oil inclusions and saline inclusion pair is applied
Cavity wall oxygen isotope ratio and micronutrient levels；The nanoparticle probe is assembled with reflected light microscope, after a test, uses
Polarisation-cathodoluminescence microscope examines the spatial relationship between microcell test point and corresponding inclusion enclave, if secondary quartz is tested
Point is neighbouring with corresponding inclusion enclave, then it is assumed that the test point was tested is the secondary quartz cavity wall of corresponding inclusion enclave, otherwise, should
Test point test is secondary quartz other parts, need to be retested to the secondary quartz cavity wall of corresponding inclusion enclave；It will
Test obtained all data retentions；
(5) oil inclusions and the formation temperature of saline inclusion pair and its oxygen isotope of secondary quartz cavity wall are applied, by such as
Lower quartz OXYGEN ISOTOPE FRACTIONATION equation, i.e. formula (1) seek the ancient stratum water oxygen of oil inclusions and saline inclusion to being formed when
Isotope：
δ18OQuartz=δ18OWater+3.24×106×T-2-3.31 (1)
In formula, δ18OWaterWhen representing quartzy oil inclusions and saline inclusion pair or the independent oil inclusions of quartz or secondary quartz formation
Ancient water flooding oxygen isotope ratio, be ‰ here；Corresponding δ18OQuartzFor the secondary stone of oil inclusions and saline inclusion pair
English cavity wall or the secondary quartz cavity wall of independent oil inclusions or the oxygen isotope ratio of secondary quartz are ‰ here；Corresponding T
Paleotemperature when being quartzy oil inclusions and saline inclusion pair or the independent oil inclusions of quartz or secondary quartz formation, unit are
K；
(6) the formation temperature and its secondary quartz cavity wall micronutrient levels for applying oil inclusions and saline inclusion pair, with such as
Functional form shown in lower formula (2) carries out multiple regression analysis or stepwise regression analysis, seeks a in formula (2)i, i=
0,1,2 ..., n and related coefficient；
In formula, when T represents quartzy oil inclusions and saline inclusion pair or the independent oil inclusions of quartz or secondary quartz formation
Paleotemperature, n are the number of tested micro- type, corresponding Ci, i=1,2 ..., n are oil inclusions and brine
I-th kind of trace element in the secondary quartz cavity wall of inclusion enclave pair or the secondary quartz cavity wall or secondary quartz of independent oil inclusions
Content, unit is μ g/g, aiFor constant, i=0,1,2 ..., n；
(7) the ancient water flooding oxygen isotope and its secondary quartz cavity wall oxygen when applying oil inclusions with saline inclusion to being formed are same
The plain ratio in position and micronutrient levels carry out multiple regression or successive Regression point by functional form shown in following formula (3)
It analyses, the b in solution formula (3)0、b1、kiAnd lijAnd related coefficient；
In formula, b0、b1、kiAnd lij, it is constant, i=1,2 ..., n；J=i, i+1 ..., n, the meaning of variable and formula (1) and
The meaning of variable is identical in formula (2)；
(8) if the related coefficient of above-mentioned steps (6) is more than or equal to the related coefficient of above-mentioned steps (7), the independent oil of application wraps up
The regression equation acquired in the micronutrient levels and above-mentioned steps (6) of body secondary quartz cavity wall seeks the shape of independent oil inclusions
At temperature；Again according to the regression equation acquired in above-mentioned steps (6), with all secondary quartz measured in step (4) and
Secondary quartz wall trace element data calculates the formation temperature of secondary quartz；Above-mentioned steps (6) regression equation is reapplied to seek
The formation temperature and its secondary quartz cavity wall oxygen isotope of independent oil inclusions, independent oil inclusions shape is sought by formula (1)
At when ancient water flooding oxygen isotope；
If the related coefficient of above-mentioned steps (6) is less than the related coefficient of above-mentioned steps (7), utilizes and acquired in above-mentioned steps (7)
Regression equation and independent oil inclusions secondary quartz cavity wall oxygen isotope ratio and micronutrient levels data, calculate only
Ancient water flooding oxygen isotope when vertical oil inclusions formation；Recycle formula (1) and independent oil inclusions secondary quartz cavity wall
Ancient water flooding oxygen isotope when oxygen isotope and the formation of independent oil inclusions, finds out Gu Wen when independent oil inclusions formation
Degree；With all secondary quartzs and secondary quartz wall oxygen isotope and trace element data measured in step (4), by above-mentioned
The regression equation and formula (1) acquired in step (7), calculate separately secondary quartz formation when ancient water flooding oxygen isotope and its
Form temperature；
(9) it uses the formation temperature data of secondary quartz and all oil inclusions to draw histogram, discloses fossil fluid activity and oil
The phase time that fate is moved, and combination buried history determines the time of fossil fluid activity and oil-gas migration respectively；
The oxygen isotope of ancient water flooding when (10) the independent oil inclusions of application and oil inclusions and saline inclusion are to forming,
The oxygen isotope and trace element of the secondary quartz cavity wall of independent oil inclusions and oil inclusions and saline inclusion pair judge
Continuous connectivity of the sand body during oil-gas migration；
(11) according to the formation temperature and its phasor and isochor of independent oil inclusions, Gu when independent oil inclusions formation is sought
Fluid pressure, the paleocurrent when oil inclusions and saline inclusion sought using its result data and above-mentioned steps (2) are to forming
Body pressure data calculates corresponding paleopressure coefficient or fluid potential in conjunction with the buried history, using paleopressure coefficient or fluid potential, knot
Connectivity, hydrocarbon source rock and the construction data for closing reservoir disclose power and the direction of oil-gas migration.
2. phase of determining oil-gas migration according to claim 1 time, the time, power and direction method, which is characterized in that
In above-mentioned steps (1), the oil that independent oil inclusions and symbiosis in clastic rock quartz are searched using polarisation-fluorescence microscope wraps
Wrap up in body and saline inclusion pair.
3. phase of determining oil-gas migration according to claim 1 or 2 time, the time, power and direction method, feature exists
In, in above-mentioned steps (1), for obtain it is reliable as a result, the oil inclusions of symbiosis and the number of saline inclusion pair be 15 or
15 or more；Study needs according to work area geology characteristic and oil-gas migration, the numbers of independent oil inclusions be 50 or 50 with
On.
4. phase of determining oil-gas migration according to claim 1 time, the time, power and direction method, which is characterized in that
In above-mentioned steps (3), using cathodoluminescence microscope or electron microscope, to the oil of the independent oil inclusions and symbiosis that find
Inclusion enclave and saline inclusion carry out cathodoluminescence observation to place position, and determine independent oil inclusions and the oil packet of symbiosis
Body and saline inclusion are wrapped up in the quartz secondary side at place or the range of secondary quartz thready pulse.
5. phase of determining oil-gas migration according to claim 1 time, the time, power and direction method, which is characterized in that
In above-mentioned steps (10), using ancient water flooding oxygen isotope, oil inclusions secondary quartz oxygen isotope and trace element, using well
Between the mode that compares of same layer judge the connectivity of continuous sand body.
6. phase of determination oil-gas migration according to claim 1,2,4 or 5 time, the time, power and direction method, it is special
Sign is that the type of the trace element includes at least aluminium, calcium and magnesium.
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