CN109425911A - The method for determining oil gas main accumulation period - Google Patents
The method for determining oil gas main accumulation period Download PDFInfo
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- CN109425911A CN109425911A CN201710773117.7A CN201710773117A CN109425911A CN 109425911 A CN109425911 A CN 109425911A CN 201710773117 A CN201710773117 A CN 201710773117A CN 109425911 A CN109425911 A CN 109425911A
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Abstract
The invention discloses a kind of methods of determining oil gas main accumulation period, it is related to petroleum exploration and development technical field, for solving the technical issues of being difficult to accurately to sentence the main accumulation period for knowing oil gas existing in the prior art, the method of present invention stand oil gas main accumulation period really, it is to determine macroscopical geologic setting as starting point, macroscopical geologic setting is fully considered, microcosmic geologic setting and at hiding trace and at hiding direct product between contacting, and Pool-forming time is screened using the chemical property of the direct product in Hydrocarbon accumulation process, the multi-solution that main accumulation period is explained in polycyclic basin can be overcome to the maximum extent, solid foundation is established for oil-gas exploration and important leverage is provided, and it reduces exploration and sentences the risk for knowing the main accumulation period of oil gas.
Description
Technical field
The present invention relates to petroleum exploration and development technical field, a kind of particularly side of determining oil gas main accumulation period
Method.
Background technique
With the intensification of Songliao basin, " periodically, quantitative " becomes the target direction of oil-gas exploration research work.Wherein
The determination of oil-gas reservoir main accumulation period is directly related to the determination and preferably of zone or even Basin Exploration series of strata.Traditional method master
Pool-forming time is defined and is analyzed according to hydrocarbon source rock life residence peak, trap forming phase and oil reservoir saturation pressure.From 20
Since the eighties in century, with the development of wake control method, by reservoir geochemistry, reservoir organic lithology, stick
The means such as the radioisotope analysis of native mineral Historical Changes and diagenetic mineral are started with from hydrocarbon source rock and at 2 focuses in hiding, right
Fluid history carries out recovery analysis, more successfully realizes the quantitative determination of reservoir formation period.But year theory is determined by geology
Or the influence of experimental methodology, these radioactive isotope dating techniques are still lacking, and also do not have to the explanation of geologic event
Accomplish rationalize and it is scientific.
It is mainly that dating of diagenetic mineral, fluid inclusion determine year and reservoir that the Pool-forming time being widely used at present, which determines year method,
Organic matter determines year etc..Dating of diagenetic mineral is change related with oil-gas migration rock or mineral by analysis minerogentic condition exhausted
Bozhong Depression is speculated to the age, is generally determined year using authigenic illite dating methods K-Ar or 40Ar-39Ar, illite
Purity and the degree that is mixed into of detrital material are to influence the main reason for surveying annual bearing accuracy, while this method is only applicable to clast
Rock.It is widely answered in recent years using the dating technique of fluid-rock system combination buried history comprehensive judgement oil and gas entrapment timing
With, using fluid inclusion carry out Pool-forming time determine year when, should be able to effectively identify the stream of different origins and separate sources first
Body inclusion enclave is familiar with the log history of various fluid inclusions, if cannot distinguish the inclusion enclave phase time well, determine whether it is equal
Mutually capture, the reliable sexual deviation of the data obtained, application of the extreme influence this method in hydrocarbon, while this method also by
Control the cultellation influence in buried history.Determine that Re-Os isotope progress Hydrocarbon Formation Reservoirs is generally used to determine year in year using reservoir organic matter,
But this method is mainly relatively good to pitch or viscous crude extract effect, simultaneously because the super low loading of Re, Os in organic system,
At present processing enriching step and isotope precise determination method it is still immature, in the exploratory stage, not be it is very stable, simultaneously it is right
The applicability of normal oil and thin oil is not fine.All kinds of Pool-forming times determine that the limitation of method is recognized and paid attention to by everybody, by
This produces all kinds of improved methods, but is all concentrated on substantially to sample acquisition, the identification of test object and experiment qualifications
Strict implement etc..Another kind of improved method be hydrocarbon period and row's hydrocarbon intensity are arranged from hydrocarbon source rock to determine Pool-forming time, but as
Noted earlier, hydrocarbon source rock row's hydrocarbon phase does not represent just genuine Pool-forming time, and Pool-forming time is not only related to row's hydrocarbon, and also and trap forming
The reservoir forming factors space-time configuration relations such as phase, reservoir formation phase are related, and single element can not determine Pool-forming time.Another kind of improved method
Exactly carried out by the micro-fluorescence spectrum of oily backpack body and the micro-fluorescence spectrum in situ of hole oil that are captured in measurement inclusion enclave
It compares to determine pool forming period, but such method is commonly available to single cycle basin, for Superimposed Basins, at present
The oil gas being present in reservoir is a lot of fillings as a result, for mix products, and the oil captured in inclusion enclave is single at hiding
Oil, using such method be difficult determine Superimposed Basins Pool-forming time.It is for special mass itself there are also some improved methods
The characteristics of corrected the knowledge of sentencing of Pool-forming time, but this kind of improved method does not have universality, does not have universal significance.
With the continuous propulsion of " Efficient Exploration " paces, the hot spot for being determined to become research and exploration of main accumulation period.Mesh
Preceding geochronology of hydrocarbon accumulation often rests on method and technology, constantly is able to improve to improve analysis number from method for testing and analyzing
According to reliability.But the most of oil-gas bearing basins in China all experienced more phase tectonic reworkings, using monotechnics be difficult to obtain with
The practical main accumulation period being consistent of geology.Geochronology of hydrocarbon accumulation often rests on method and technology at present, constantly from test point
Analysis method is able to the reliability for improving to improve analysis data, but often has ignored macroscopical geologic setting, microcosmic geologic setting
And at hiding trace and at contacting between hiding direct product, to make to sentence the very risky of the main accumulation period for knowing oil gas.
Summary of the invention
The present invention provides a kind of method that different acquisition parameter determines oil gas main accumulation period, for solving in the prior art
It is existing to be difficult to the technical issues of accurately sentencing the main accumulation period for knowing oil gas.
The present invention provides a kind of method that different acquisition parameter determines oil gas main accumulation period, comprising the following steps: S10:
Analysis On The Geological Background is carried out to research area, determines macroscopical geologic setting in research area；
S20: carrying out collection of rock sample to research area, and analyze rock sample, grinds in conjunction with macroscopical geologic setting determination
Study carefully the Pool-forming time set in area；
S30: analyzing the chemical property of the direct product in Hydrocarbon accumulation process, based on the analysis results, from described
Main accumulation period is determined in Pool-forming time set.
According to one embodiment of present invention, in step S20, rock sample is analyzed the following steps are included:
S21: inclusion enclave identification is carried out to rock sample, obtains inclusion enclave host minerals；
S22: carrying out lithology analysis to the inclusion enclave host minerals, obtains the precedence that inclusion enclave is formed；
S23: carrying out Fluorescence Analysis and thermometric to the inclusion enclave, obtains microspectrum feature and package temperature number
According to.
It according to one embodiment of present invention, further include to the list on the basis of research area's structural evolution analysis in step S20
Well burial history reconstruction and the step of obtain burial history curve.
According to one embodiment of present invention, by combining inclusion enclave temperature data with burial history curve, institute is obtained
State Pool-forming time set.
According to one embodiment of present invention, in step S30, the direct product in the Hydrocarbon accumulation process is in oil reservoir
Crude oil.
According to one embodiment of present invention, in step S30, the chemical property is oil gas saturated hydrocarbons chromatographic characteristics.
According to one embodiment of present invention, in step S10, carrying out Analysis On The Geological Background to research area includes determining mainly
The step of phase of structural deformation and hydrocarbon source rock main life residence phase.
According to one embodiment of present invention, the Pool-forming time set includes multiple Pool-forming times.
According to one embodiment of present invention, the Pool-forming time meets reservoir forming factor with the main phase of structural deformation respectively
Space-time configuration relation.
According to one embodiment of present invention, the research area is polycyclic basin.
Compared with the prior art, the advantages of the present invention are as follows: to determine macroscopical geologic setting as starting point, by rock sample
It is analyzed, and determine oil and gas entrapment timing set in conjunction with macroscopical geologic setting, finally according to direct in Hydrocarbon accumulation process
The chemical property of product is filtered out with the Pool-forming time being mainly worth at hiding from above-mentioned Pool-forming time set, can finally be determined
There is the main accumulation period of directive significance to exploration.Therefore the present invention sufficiently comprehensive geology information, and use Hydrocarbon accumulation process
In the chemical property of direct product Pool-forming time is screened, can overcome to the maximum extent in polycyclic basin mainly at hiding
The multi-solution that phase explains establishes solid foundation for oil-gas exploration and provides important leverage, and reduces exploration and sentence the master for knowing oil gas
Want the risk of Pool-forming time.
Detailed description of the invention
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.
Fig. 1 is the flow chart of the method for stand oil gas main accumulation period really in the embodiment of the present invention；
Fig. 2 is Tahe Region TS3 well inclusion enclave homogenization temperature frequency distribution in the embodiment of the present invention；
Fig. 3 is Tahe Region TS3 well buried history and inclusion temperature cultellation figure in the embodiment of the present invention；
Fig. 4 is Tahe Region TS3 well crude oil saturated hydrocarbons chromatographic characteristics figure in the embodiment of the present invention.
In the accompanying drawings, identical component uses identical appended drawing reference.The attached drawing is not drawn according to the actual ratio.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is the flow chart for the method that one of embodiment of the present invention determines oil gas main accumulation period；As shown in Figure 1,
Method includes the following steps:
Step 1: carrying out Analysis On The Geological Background to research area, macroscopical geologic setting in research area is determined.
Wherein, research area is polycyclic basin.For polycyclic basin, oil gas often undergoes multistage charge and adjoint
Repeatedly transformation, oil gas be the product of multistage charge, transformation, it is therefore desirable to comprehensive each side's information and increase geology macroscopic,
The constraint of the microcosmic background of geology and oil gas chemical property itself sentences knowledge to oil gas main accumulation period to reach.
The macroscopical geologic setting for determining research area further includes by carrying out Analysis On The Geological Background to research area so that it is determined that main
The step of wanting phase of structural deformation and oil gas main life residence phase.By main phase of structural deformation and oil gas main life residence phase, i.e.,
It can be from the Pool-forming time for macroscopically limiting oil gas.
Step 2: carrying out collection of rock sample to research area, and rock sample is analyzed, is determined in conjunction with macroscopical geologic setting
Study the Pool-forming time set in area.
Wherein, which includes multiple Pool-forming times.
And above-mentioned multiple Pool-forming times meet reservoir forming factor space-time with the main phase of structural deformation obtained in the first step respectively
Configuration relation.The space-time configuration relation of so-called reservoir forming factor just refer to oil gas can at hiding fundamental " raw, storage, lid, circle,
Fortune is protected " it to be mutually matched over time and space, is indispensable.
Specifically, determine Pool-forming time set the following steps are included:
Firstly, carrying out inclusion enclave identification to rock sample, inclusion enclave host minerals are obtained；Secondly, to the inclusion enclave host mine
Object carries out lithology analysis, obtains the precedence that inclusion enclave is formed；Finally, to the inclusion enclave carry out Fluorescence Analysis and
Thermometric obtains microspectrum feature and inclusion enclave temperature data.
In addition, further including carrying out individual well burial history reconstruction to the structural evolution feature in research area and obtaining burial history curve
Step.
In addition, inclusion enclave temperature data is combined with burial history curve, i.e., by inclusion temperature data in the buried history
Upper carry out cultellation, to obtain the Pool-forming time set.Wherein, do not have one not on burial history curve if there is same temperature
The case where with geologic age, then can refer to inclusion petrography result of study, and analyze its cultellation position.
Step 3: the chemical property to the direct product in Hydrocarbon accumulation process carries out, based on the analysis results, from Pool-forming time
Main accumulation period is determined in set.
Specifically, the direct product in Hydrocarbon accumulation process is the crude oil in oil reservoir.
Further, above-mentioned chemical property is oil gas saturated hydrocarbons chromatographic characteristics.
Based on crude saturated hydrocarbons chromatographic characteristics can filter out main accumulation period from above-mentioned Pool-forming time set.Wherein,
Polycyclic basin often undergoes tectonic movement and the hydro carbons hydrocarbon expulsion process of more phases time, these processes, which are reflected in test result, is exactly
Multi-stage accumulation；And oil gas of the preservation in stratum is often the mix products of multistage charge now, and this mix products are inevitable
It is to be formed based on the hydrocarbon charge of a phase, exploration decision deployment is often more concerned about this and mainly fills the phase i.e. mainly at hiding
Phase.To main accumulation period sentence know can direct study area exploration deployment decision and development plan formulation, be oil-gas exploration
Solid foundation and important leverage.
In conclusion the method for determining oil gas main accumulation period proposed by the present invention, is the feature according to polycyclic basin,
Main phase of structural deformation and hydrocarbon source rock life residence phase determined by macroscopical geologic setting, that is, structural evolution are determined to send out, and pass through
Inclusion enclave carries out lithology analysis and then carries out inclusion enclave Fluorescence Analysis and survey to limit the precedence of inclusion enclave formation
Determine temperature, and determine oil and gas entrapment timing in conjunction with buried history；Finally according to oil gas saturated hydrocarbons chromatography in oil-gas reservoir as a result, from
By filtering out main accumulation period in Pool-forming time determined by structural evolution, Inclusions combination buried history, in the process,
Macroscopical geologic setting, microcosmic geologic setting are fully considered and at hiding trace and at contacting between hiding direct product, therefore most
Determining eventually has directive significance to exploration to main accumulation period.
Below by taking Tahe Region TS3 well (well depth is 6103~6115.21m) as an example, method of the invention is illustrated.
Firstly, determining macroscopical geologic setting of this area.Tahe Region experienced more phase tectonic movements, Caledon advanced stage-
Early Hercynian period, sea western advanced stage, Yin Zhi-Stage of Yanshan and Himalayan are that main phase of structural deformation and main hydrocarbon are main
The hydrocarbon phase is arranged, wherein Caledon advanced stage and Hai Xi advanced stage are that trap (reservoir) primarily forms the phase.
Secondly, determining Pool-forming time set.Inclusion enclave identification wherein is carried out to rock sample, acquisition inclusion enclave host minerals are solution cavity
The calcite filled in the ingotism calcite of middle filling, different times crack；By carrying out lithology to inclusion enclave host minerals
Analysis, obtaining the precedence that inclusion enclave is formed is ingotism calcite, in the calcite and later period crack that fill in early crack
The calcite of filling；By carrying out Fluorescence Analysis and thermometric to oil inclusions, obtaining oil inclusions fluorescence color is mainly
Three classes represent the filling of three phase differing maturity crude oil；It is mainly distributed on the saline inclusion temperature of oil inclusions phase association
65 DEG C~75 DEG C, 90 DEG C~110 DEG C and a small amount of temperature are 120 DEG C, as shown in Fig. 2, representing the filling of oil gas at least three phases.
In addition, obtaining burial history curve according to Tahe Region structural evolution feature.By above-mentioned temperature measurement data in buried history
Cultellation is carried out on curve, is combined into Caledon advanced stage-early Hercynian period as shown in figure 3, determining by the oil reservoir Pool-forming time collection (temperature range is
70.6-79.3 DEG C), Yin Zhi-Stage of Yanshan (temperature range be 90.6-79.3 DEG C and 98.1-112.9 DEG C) and Himalayan
(temperature range is 126.3-128.9 DEG C), the result of study of this Pool-forming time match with above-mentioned macroscopical geologic setting, meet into
Hiding element space-time configuration relation analysis is as a result, but can not also know the main accumulation period of the oil reservoir.
Finally, by carrying out saturated hydrocarbons chromatography to the crude oil in the TS3 well Ordovician system, as shown in figure 4, abscissa in figure
It is fractionation time of the paraffinic compounds in map on chromatography pillar, ordinate is that (i.e. compound is rich for the peak height of compound
Degree), saturated hydrocarbons chromatogram has apparent bulge to Fig. 4 as the result is shown, shows that the Reservoir Crude Oil is mainly the crude oil of early stage filling
It is formed by later stage degradation, then the light oil filling of two phases does not play a crucial role to the formation of the oil reservoir, has little significance, therefore
The oil reservoir main accumulation period should be Caledon advanced stage-early Hercynian period.This understanding is demonstrate,proved by the exploration in the area adjacent area Ai Ding, exploitation
It is real, while the understanding of this main accumulation period also directs the exploration deployment decision and the formulation of development plan in the area.
Although by reference to preferred embodiment, invention has been described, the case where not departing from the scope of the present invention
Under, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as there is no structures to rush
Prominent, items technical characteristic mentioned in the various embodiments can be combined in any way.The invention is not limited to texts
Disclosed in specific embodiment, but include all technical solutions falling within the scope of the claims.
Claims (10)
1. a kind of method of determining oil gas main accumulation period, which comprises the following steps:
S10: Analysis On The Geological Background is carried out to research area, determines macroscopical geologic setting in research area；
S20: carrying out collection of rock sample to research area, and analyze rock sample, determines research area in conjunction with macroscopical geologic setting
Pool-forming time set；
S30: analyzing the chemical property of the direct product in Hydrocarbon accumulation process, based on the analysis results, from described at hiding
Main accumulation period is determined in phase set.
2. the method for determining oil gas main accumulation period according to claim 1, which is characterized in that in step S20, to rock sample
Analyzed the following steps are included:
S21: inclusion enclave identification is carried out to rock sample, obtains inclusion enclave host minerals；
S22: carrying out lithology analysis to the inclusion enclave host minerals, obtains the precedence that inclusion enclave is formed；
S23: Fluorescence Analysis and thermometric are carried out to the inclusion enclave, obtain microspectrum feature and inclusion enclave temperature data.
3. the method for determining oil gas main accumulation period according to claim 1 or 2, which is characterized in that in step S20, also
Include the steps that the individual well burial history reconstruction on the basis of research area's structural evolution analysis and obtains burial history curve.
4. the method for determining oil gas main accumulation period according to claim 3, which is characterized in that by the way that temperature will be wrapped up
Data are combined with burial history curve, obtain the Pool-forming time set.
5. the method for determining oil gas main accumulation period according to claim 1 or 2, which is characterized in that in step S30, institute
Stating the direct product in Hydrocarbon accumulation process is the crude oil in oil reservoir.
6. the method for determining oil gas main accumulation period according to claim 5, which is characterized in that in step S30, describedization
Property is oil gas saturated hydrocarbons chromatographic characteristics.
7. the method for stand oil gas main accumulation period really according to any one of claim 2-6, which is characterized in that step
In S10, the step that Analysis On The Geological Background includes determining main phase of structural deformation and hydrocarbon source rock main life residence phase is carried out to research area
Suddenly.
8. the method for determining oil gas main accumulation period according to claim 7, which is characterized in that the Pool-forming time set packet
Include multiple Pool-forming times.
9. the method for determining oil gas main accumulation period according to claim 8, which is characterized in that the Pool-forming time respectively with
The main phase of structural deformation meets reservoir forming factor space-time configuration relation.
10. the method for determining oil gas main accumulation period according to claim 1 or 2, which is characterized in that the research area is
Polycyclic basin.
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| CN114441484A (en) * | 2020-11-02 | 2022-05-06 | 中国石油化工股份有限公司 | Method for depicting range of biodegradable heavy oil reservoir |
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| CN114660269A (en) * | 2022-03-23 | 2022-06-24 | 中国海洋石油集团有限公司 | Recovery method for dynamic natural gas accumulation process of ancient buried hill |
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Application publication date: 20190305 |