CN110244382A - Basin edge is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas - Google Patents
Basin edge is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas Download PDFInfo
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Abstract
The present invention provides a kind of basin edge and sees that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, comprising: using it has been found that heavy crude reservoir Analysis of Geochemical Characteristics, differentiate whether it is the microbial degradation origin cause of formation；Then is carried out by natural gas production quantity and is calculated, determines whether valuable further development METHOD OF SHALLOW GAS RESERVOIRS investigation and prospecting according to palliating degradation degree for the heavy crude reservoir of the microbial degradation origin cause of formation；For there is the zone of METHOD OF SHALLOW GAS RESERVOIRS exploration value, the possible migration direction of natural gas is found；It favorably migrates in shallow gas and is directed toward area, find METHOD OF SHALLOW GAS RESERVOIRS favorable region domain；In METHOD OF SHALLOW GAS RESERVOIRS favorable region domain, carry out hydrocarbon detection using seismic data；Carry out METHOD OF SHALLOW GAS RESERVOIRS overall merit.This method can be used for it has been found that heavy crude reservoir is the exploration of the METHOD OF SHALLOW GAS RESERVOIRS in the case of the microbial degradation origin cause of formation, when heavy crude reservoir is the microbial degradation origin cause of formation, above it or updip direction should develop the natural gas of the microbial degradation origin cause of formation, can track METHOD OF SHALLOW GAS RESERVOIRS with this.
Description
Technical field
The present invention relates to petroleum geology Exploration Domain, especially relates to a kind of basin edge and see that oil chases after the shallow gas of gas
Hide exploitation method.
Background technique
In basin, periphery and raised band have found METHOD OF SHALLOW GAS RESERVOIRS abundant and heavy crude reservoir, and exploration practices show: the two at
Because related, distribution orderly, but is still to explore the two respectively in exploration, the origin cause of formation of the two and distribution is not made full use of to close
System.It is special mainly often to show as " bright spot " this seismic reflection using METHOD OF SHALLOW GAS RESERVOIRS in earthquake for exploration for METHOD OF SHALLOW GAS RESERVOIRS
Sign explored, but in " bright spot " seismic reflection gas reservoir exploration degree it is very high, into exploration bottleneck, it is remaining to
It was found that gas reservoir and not having typical " bright spot " Seismic reflection character, we have invented a kind of new basin edge to see that oil chases after gas thus
METHOD OF SHALLOW GAS RESERVOIRS exploitation method solves the above technical problem.
Summary of the invention
The object of the present invention is to provide the advantageous directions that one kind can be indicated according to heavy crude reservoir to METHOD OF SHALLOW GAS RESERVOIRS migration path system
Three achievements such as area, preservation condition research achievement favorable region domain, hydrocarbon detection carry out overall merit to METHOD OF SHALLOW GAS RESERVOIRS, right
See that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas in the basin edge for instructing METHOD OF SHALLOW GAS RESERVOIRS exploration to be of great significance.
The purpose of the present invention can be achieved by the following technical measures: basin edge is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas,
It includes: step 1 that the basin edge, which is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, utilizes the Geochemical Characteristics point for having found heavy crude reservoir
Analysis, differentiates whether it is the microbial degradation origin cause of formation；Step 2, to the heavy crude reservoir of the then microbial degradation origin cause of formation, according to degradation journey
Degree is carried out natural gas production quantity and is calculated, determines whether valuable further development METHOD OF SHALLOW GAS RESERVOIRS investigation and prospecting；Step 3, for having
The zone of METHOD OF SHALLOW GAS RESERVOIRS exploration value, using heavy crude reservoir as gas source, the migration path system for carrying out heavy crude reservoir to METHOD OF SHALLOW GAS RESERVOIRS is studied,
Find the possible migration direction of natural gas；Step 4, it favorably migrates in shallow gas and is directed toward area, carry out METHOD OF SHALLOW GAS RESERVOIRS preservation condition and grind
Study carefully, finds METHOD OF SHALLOW GAS RESERVOIRS favorable region domain；Step 5, in METHOD OF SHALLOW GAS RESERVOIRS favorable region domain, carry out oil-containing using seismic data
Gas detection；Step 6, according to migration path system research, the achievement of preservation condition research and hydrocarbon detection, in conjunction with geological analysis, into
Row METHOD OF SHALLOW GAS RESERVOIRS overall merit.
The purpose of the present invention can be also achieved by the following technical measures:
In step 1, carry out heavy crude reservoir Analysis of Geochemical Characteristics, microbial degradation origin cause of formation viscous crude is in saturated hydrocarbons chromatography
There is baseline bulge, n-alkane missing, these more features of gonane miscellaneous peak on figure.
In step 1, for be not the microbial degradation origin cause of formation heavy crude reservoir, then process terminates, which sees that oil chases after gas
METHOD OF SHALLOW GAS RESERVOIRS exploitation method be not available.
In step 2, it is calculated natural for being determined as the heavy crude reservoir of the microbial degradation origin cause of formation according to its palliating degradation degree
Gas production quantity determines whether valuable further development METHOD OF SHALLOW GAS RESERVOIRS investigation and prospecting.
In step 2, it is derived according to the microbial degradation simulated experiment of development, oil degradation gas generating amount molecular formula, is former
Oil degradation gas generating amount geological statistics, ton oil gas generating amount is in 100-300m3/ t variation.
In step 2, when determining the further development METHOD OF SHALLOW GAS RESERVOIRS investigation and prospecting of no value, then process terminates, and no longer opens
Open up METHOD OF SHALLOW GAS RESERVOIRS investigation and prospecting.
In step 3, for the zone for thering is exploration to be worth, in the top or updip direction for having found heavy crude reservoir, first
The distribution of two transporting element of tomography and sand body is described using tectonic interpretation, Seismic Reservoir Prediction these means and its configuration is closed
System, the migration path system for carrying out heavy crude reservoir to METHOD OF SHALLOW GAS RESERVOIRS are studied, and determine the possibility migration direction of shallow gas.
In step 4, it is directed toward area in the possible migration of shallow gas, whether preservation condition is the key that shallow gas at hiding, benefit
Carry out the research of METHOD OF SHALLOW GAS RESERVOIRS preservation condition with the test of mud stone breakthrough pressure, these means of mud stone thickness distribution, finds METHOD OF SHALLOW GAS RESERVOIRS
Favorable region domain.
In steps of 5, for METHOD OF SHALLOW GAS RESERVOIRS favorable region domain, seismic amplitude attribute, frequency absorption attenuation attributes are utilized
These technological means carry out hydrocarbon detection, find advantageous gassiness area.
In step 6, carrying out heavy crude reservoir to METHOD OF SHALLOW GAS RESERVOIRS migration path system, the research of METHOD OF SHALLOW GAS RESERVOIRS preservation condition, oil-containing
After gas detection, the achievement shallow gas studied using this three, which is migrated, is favorably directed toward area, shallow gas favorable region, hydrocarbon detection
Exceptions area carries out comprehensive analysis, and evaluation of shallow gas hides scale, as exploration deployment foundation.
Basin edge in the present invention is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, has found that heavy crude reservoir is micro- suitable for basin edge
The exploration of METHOD OF SHALLOW GAS RESERVOIRS in the case of the biodegradable origin cause of formation has concrete guide meaning to sparker survey.It is needed first using this method
It whether to be the microbial degradation origin cause of formation using the heavy crude reservoir that the means such as Analysis of Geochemical Characteristics differentiate that basin edge has found.If no
It is then whether to develop METHOD OF SHALLOW GAS RESERVOIRS above heavy crude reservoir and do not know, this method cannot be used, if so, according to its geochemistry
Feature determines its palliating degradation degree, and calculates its natural gas production quantity accordingly.It is smaller for gas generating amount, valueless zone, no longer
Further carry out the work.For having the zone of exploration value, further uses this method and carry out METHOD OF SHALLOW GAS RESERVOIRS exploration, open first
The migration migration path system research for opening up heavy crude reservoir abjection natural gas, to find the possible migration direction of natural gas, then carries out
The preferable natural gas favorable region of preservation condition is found in METHOD OF SHALLOW GAS RESERVOIRS preservation condition research, and using seismic data to possible
Hydrocarbon detection is carried out in the region for developing METHOD OF SHALLOW GAS RESERVOIRS, to identify the advantageous development area of shallow gas, is finally favorably transported using shallow gas
It moves and is directed toward area, the preferable favorable region of preservation condition, hydrocarbon detection exceptions area, 3rd area overlapping integrates research area
Evaluation, instructs exploration and development plan implementation.
Detailed description of the invention
Fig. 1 is that basin edge of the invention is shown in that oil chases after the flow chart of a specific embodiment of the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas；
Fig. 2 is that certain a well viscous crude sample geo-chemical feature analyzes map in a specific embodiment of the invention；
Fig. 3 is a certain area fracture and sand body migration path system distribution map in a specific embodiment of the invention；
Fig. 4 is a certain regional mudstone caprock thickness distribution map in a specific embodiment of the invention；
Fig. 5 is that a certain area is carried out using seismic absorption attenuation attributes (low-frequency resonant) in a specific embodiment of the invention
Gas distribution prediction sectional view；
Fig. 6 is a certain regional METHOD OF SHALLOW GAS RESERVOIRS map of Complex evaluation in a specific embodiment of the invention.
Specific embodiment
To enable above and other objects, features and advantages of the invention to be clearer and more comprehensible, preferably implementation is cited below particularly out
Example, and cooperate shown in attached drawing, it is described in detail below.
As shown in FIG. 1, FIG. 1 is basin edge of the invention to see that oil chases after the flow chart of the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas.
Step 101, using the Analysis of Geochemical Characteristics for having found heavy crude reservoir, differentiate its whether be microbial degradation at
Cause.Basis with this method is that basin edge heavy crude reservoir is the microbial degradation origin cause of formation, needs to carry out heavy crude reservoir first geochemical
Signature analysis is learned, microbial degradation origin cause of formation viscous crude has baseline bulge, n-alkane missing, gonane miscellaneous on saturated hydrocarbons chromatogram
The features such as peak is more.
Step 102, natural gas production quantity is carried out according to palliating degradation degree to the heavy crude reservoir of the then microbial degradation origin cause of formation
It calculates, determines whether valuable further development METHOD OF SHALLOW GAS RESERVOIRS investigation and prospecting.For being determined as the viscous crude of the microbial degradation origin cause of formation
Oil reservoir should calculate natural gas production quantity according to its palliating degradation degree, determine whether valuable further development METHOD OF SHALLOW GAS RESERVOIRS exploration work
Make.Microbial degradation simulated experiment, the derivation of oil degradation gas generating amount molecular formula, the oil degradation generation carried out according to this team
Tolerance geological statistics, ton oil gas generating amount is in 100-300m3/ t variation.
Step 103, for there is the zone of METHOD OF SHALLOW GAS RESERVOIRS exploration value, using heavy crude reservoir as gas source, carry out heavy crude reservoir and arrive
The migration path system of METHOD OF SHALLOW GAS RESERVOIRS is studied, and the possible migration direction of natural gas is found.For the zone for thering is exploration to be worth, having found
The top of heavy crude reservoir or updip direction, should be described first with means such as tectonic interpretation, Seismic Reservoir Predictions tomography and
The distribution of two transporting element of sand body and its configuration relation, the migration path system for carrying out heavy crude reservoir to METHOD OF SHALLOW GAS RESERVOIRS are studied, and are determined shallow
The possibility migration direction of layer gas.
Step 104, it favorably migrates in shallow gas and is directed toward area, carry out the research of METHOD OF SHALLOW GAS RESERVOIRS preservation condition, find METHOD OF SHALLOW GAS RESERVOIRS
Favorable region domain.It is directed toward area in the possible migration of shallow gas, whether preservation condition is the key that shallow gas at hiding, needs to utilize
The means such as the test of mud stone breakthrough pressure, mud stone thickness distribution carry out the research of METHOD OF SHALLOW GAS RESERVOIRS preservation condition, and it is advantageous to find METHOD OF SHALLOW GAS RESERVOIRS
Aggregation zone.
Step 105, in METHOD OF SHALLOW GAS RESERVOIRS favorable region domain, carry out hydrocarbon detection using seismic data.For shallow gas
Sharp aggregation zone is kept, the technological means such as seismic amplitude attribute, frequency absorption attenuation attributes is can use and carries out hydrocarbon detection,
Find advantageous gassiness area.
Step 106, according to migration path system research, the achievement of preservation condition research and hydrocarbon detection, in conjunction with geological analysis,
Carry out METHOD OF SHALLOW GAS RESERVOIRS overall merit.Carry out heavy crude reservoir to METHOD OF SHALLOW GAS RESERVOIRS migration path system, the research of METHOD OF SHALLOW GAS RESERVOIRS preservation condition, contain
After oil and gas detection, the advantageous direction area, shallow gas favorable region, oil-containing of achievement shallow gas migration of this three research can use
Gas detects exceptions area and carries out comprehensive analysis, and evaluation of shallow gas hides scale, as exploration deployment foundation.
In an application specific embodiment of the invention, comprising the following steps:
In step 1, the heavy crude reservoir having found is sampled first, it is special carries out the geochemistry such as saturated hydrocarbons chromatogram
Sign analysis, if its chromatogram characteristic is that distribution of normal alkanes is complete, feature of not degrading, then the heavy crude reservoir is not microorganism drop
The origin cause of formation is solved, then this method is unavailable, if on spectrogram phenomena such as visible n-alkane missing, gonane miscellaneous peak, baseline bulge, such as schemed
2, then it can determine that area's heavy crude reservoir is the microbial degradation origin cause of formation.
In step 2, for being determined as the heavy crude reservoir of the microbial degradation origin cause of formation, according to fig. 2 in, chromatogram characteristic can
Know, area's n-alkane missing, gonane miscellaneous peak is slightly more, slight degradation, terpane free of losses, and palliating degradation degree is 5-6 grades, be in wait until
Serious palliating degradation degree.Local area heavy oil reserves scale is 1.2 × 108T, it is contemplated that generate amount of natural gas 1.2-3.6 × 1010m3, have
Larger exploration value.The oily gas generating amount of ton is in 100-300m3/ t variation.
In step 3, above the heavy crude reservoir that the area has found or updip direction carry out tectonic interpretation, earthquake
Reservoir prediction, the migration path system for carrying out heavy crude reservoir to METHOD OF SHALLOW GAS RESERVOIRS are studied, and description fracture and skeleton matching configuration relation are such as schemed
3, the possible migration direction of shallow gas is the Guantao town the Zu Heminghua group stratum on the western protrusion in the area.
In step 4, it is directed toward area in the possible migration of shallow gas, whether preservation condition is the key that shallow gas at hiding, benefit
Carry out the research of METHOD OF SHALLOW GAS RESERVOIRS preservation condition, such as Fig. 4, Ng1 and Ng2 with means such as the test of mud stone breakthrough pressure, mud stone thickness distributions
Mud stone thickness is big, is the advantageous interval of preservation condition.
In steps of 5,1 section and 2 sections of west area Guantao group favorably assembled for METHOD OF SHALLOW GAS RESERVOIRS, utilizes seismic amplitude category
Property, the technological means such as frequency absorption attenuation attributes carry out hydrocarbon detection, such as Fig. 5, in frequency absorption attenuation attributes, (low frequency is humorous
Vibration) on section, gas reservoir shows as obvious exception.
In step 6, carrying out viscous crude-shallow gas migration path system, the research of METHOD OF SHALLOW GAS RESERVOIRS preservation condition, hydrocarbon detection base
On plinth, the achievement shallow gas studied using this three is favorably directed toward area, favorable region, advantageous gassiness area progress comprehensive analysis,
Evaluation of shallow gas hides scale, such as Fig. 6, the foundation designed as exploration deployment, well location.
Basin edge in the present invention is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, is carrying out basin edge heavy crude reservoir and METHOD OF SHALLOW GAS RESERVOIRS
On Metallogenic relations Research foundation, it is believed that heavy crude reservoir is the main gas source of METHOD OF SHALLOW GAS RESERVOIRS, iing has been found that heavy crude reservoir is microorganism
It is degraded into because in the case of, can be used for the exploration for having found that heavy crude reservoir is the METHOD OF SHALLOW GAS RESERVOIRS in the case of the microbial degradation origin cause of formation,
When heavy crude reservoir is the microbial degradation origin cause of formation, above it or updip direction should develop the natural of the microbial degradation origin cause of formation
Gas can track METHOD OF SHALLOW GAS RESERVOIRS with this.
Claims (10)
1. basin edge is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, which is characterized in that the basin edge is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploration of gas
Method includes:
Step 1, using the Analysis of Geochemical Characteristics for having found heavy crude reservoir, differentiate whether it is the microbial degradation origin cause of formation；
Step 2, is carried out by natural gas production quantity and is calculated, is sentenced according to palliating degradation degree for the heavy crude reservoir of the then microbial degradation origin cause of formation
It is fixed whether valuable further development METHOD OF SHALLOW GAS RESERVOIRS investigation and prospecting；
Step 3, for there is the zone of METHOD OF SHALLOW GAS RESERVOIRS exploration value, using heavy crude reservoir as gas source, carry out heavy crude reservoir to shallow gas
The migration path system of hiding is studied, and the possible migration direction of natural gas is found；
Step 4, it favorably migrates in shallow gas and is directed toward area, carry out the research of METHOD OF SHALLOW GAS RESERVOIRS preservation condition, find METHOD OF SHALLOW GAS RESERVOIRS and favorably gather
Collect region；
Step 5, in METHOD OF SHALLOW GAS RESERVOIRS favorable region domain, carry out hydrocarbon detection using seismic data；
Step 6, it is carried out shallow according to the achievement of migration path system research, preservation condition research and hydrocarbon detection in conjunction with geological analysis
Layer gas reservoir overall merit.
2. basin edge according to claim 1 is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, which is characterized in that in step 1,
Carry out heavy crude reservoir Analysis of Geochemical Characteristics, microbial degradation origin cause of formation viscous crude on saturated hydrocarbons chromatogram have baseline bulge,
N-alkane missing, these more features of gonane miscellaneous peak.
3. basin edge according to claim 1 is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, which is characterized in that in step 1,
For not being the heavy crude reservoir of the microbial degradation origin cause of formation, then process terminates, which sees that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas
It is not available.
4. basin edge according to claim 1 is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, which is characterized in that in step 2,
For being determined as the heavy crude reservoir of the microbial degradation origin cause of formation, according to its palliating degradation degree, natural gas production quantity is calculated, is determined whether there is
Value further carries out METHOD OF SHALLOW GAS RESERVOIRS investigation and prospecting.
5. basin edge according to claim 4 is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, which is characterized in that in step 2,
It is derived according to the microbial degradation simulated experiment of development, oil degradation gas generating amount molecular formula, oil degradation gas generating amount geology
Statistics, ton oil gas generating amount is in 100-300m3/ t variation.
6. basin edge according to claim 4 is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, which is characterized in that in step 2,
When determining further to carry out METHOD OF SHALLOW GAS RESERVOIRS investigation and prospecting without value, then process terminates, no longer development METHOD OF SHALLOW GAS RESERVOIRS investigation and prospecting.
7. basin edge according to claim 1 is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, which is characterized in that in step 3,
For the zone for thering is exploration to be worth, in the top or updip direction for having found heavy crude reservoir, first with tectonic interpretation,
Shake these means of reservoir prediction describe distribution and its configuration relation of two transporting element of tomography and sand body, carry out heavy crude reservoir to shallowly
The migration path system research of layer gas reservoir, determines the possibility migration direction of shallow gas.
8. basin edge according to claim 1 is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, which is characterized in that in step 4,
It is directed toward area in the possible migration of shallow gas, whether preservation condition is the key that shallow gas at hiding, tested using mud stone breakthrough pressure,
These means of mud stone thickness distribution carry out the research of METHOD OF SHALLOW GAS RESERVOIRS preservation condition, find METHOD OF SHALLOW GAS RESERVOIRS favorable region domain.
9. basin edge according to claim 1 is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, which is characterized in that in steps of 5,
For METHOD OF SHALLOW GAS RESERVOIRS favorable region domain, contained using seismic amplitude attribute, the development of these technological means of frequency absorption attenuation attributes
Oil and gas detection finds advantageous gassiness area.
10. basin edge according to claim 1 is shown in that oil chases after the METHOD OF SHALLOW GAS RESERVOIRS exploitation method of gas, which is characterized in that in step 6
In, after carrying out heavy crude reservoir to METHOD OF SHALLOW GAS RESERVOIRS migration path system, the research of METHOD OF SHALLOW GAS RESERVOIRS preservation condition, hydrocarbon detection, utilize this
The advantageous direction area of achievement shallow gas migration, shallow gas favorable region, the hydrocarbon detection exceptions area of three research are integrated
Analysis, evaluation of shallow gas hides scale, as exploration deployment foundation.
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