CN109800451A - High degree of prospecting area exploration strata dividing elements method - Google Patents
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Abstract
The present invention provides a kind of division methods of high degree of prospecting area exploration layer unit, comprising: determines the purpose series of strata splitting scheme in suitable basin or the exploration demand that is recessed；Compilation target zone structural map is distributed according to second level control band tomography and main Sedimentary Facies, divides target zone second configuration Petrographic zone；Divide the third-level tectonic element by construction control；Compilation deposits phase-plane diagram and reservoir thickness isogram, is distributed according to sedimentary facies and reservoir thickness, divides by the facies-controlled sedimentation unit boundary of rock；Compilation divides Oil Reservoir Types discovered reserve, Fluid pressure overlapping flat distribution map, and analyzing oil and gas source dissects hydrocarbon carrier system, divides oil sources+transporting control Accumulation unit；Structural unit, sedimentation unit, the poly- unit of fortune are overlapped, it is comprehensive to determine exploration strata elementary boundary in conjunction with different units Exploration Domain, the difference of deployment thinking technical method.This method strong operability specifies exploratory area exploration layer unit into the otherness and enrichment discipline of hiding.
Description
Technical field
The present invention relates to petroleum exploration theory method fields, especially relate to a kind of high degree of prospecting area exploration layer unit
Division methods.
Background technique
Exploration unit refer to the oil-gas exploration stage match for exploration research, evaluation arrangement exploration groundwork
Unit.Currently, domestic many exploratory areas enter the mature exploration phase.Into the oil-gas bearing basin (or oily area) in exploration maturity period, just
It more has been found and verifies to the oil-gas reservoir of tectosphere closed form, and atectonic trap type oil-gas reservoir (i.e. hidden-type oil-gas reservoir) then becomes
The main object of oil-gas exploration, the evaluation for exploring unit preferably also develop to fining direction.
China's oil-gas exploration history is made a general survey of, different exploration theory periods explores the theoretical foundation and scale of dividing elements
It is different.The forties in 19th century, under theory of continental origin of oil guidance, using oil-gas bearing basin as main exploration unit, scale is big, is suitble to
Exploration initial stage.The sixties in 19th century has divided Petroleum System, under the guidance of source control opinion with Effective source rocks body institute oil generation
The accessibility maximum magnitude of gas is boundary, it emphasizes the genetic relationship between source and hiding, and hydrocarbon is developed together with Aggregation indica
System research is suitable for single cycle and once finely divides at the early stage reservoir-forming study of the oil-gas bearing basin of hydrocarbon, but to mature exploration area
Without practical significance.The eighties in 19th century has divided multiple oil and gas accumulation zone under multiple oil and gas accumulation zone theoretical direction, it refers to
In the same second-order structure zone, be related in the origin cause of formation, aggregation conditions it is similar, the oil gas based on certain class oil-gas reservoir, supplemented by other
Hide group；It highlights the similitude of Oil-gas origin, carries out comprehensive analysis, description to reservoir forming factor from the angle of macroscopic view；It is suitable for
Basin Exploration is early, mid-term analogy is predicted, is not the oil gas unit of truly genetic classification.Into 20th century, oil-gas exploration
Into the Subtle reservoir exploration stage, which has divided three kinds of representative exploration units altogether: first is that tectofacies zone,
It emphasizes that second-order structure zone divides and its to the control action of sedimentary system, required in division tectonic system, sedimentary system it is complete
Whole property is suitble to the Oil-gas exploration evaluation research of band level；Second is that oil-accumulating unit, it is to arrange hydrocarbon slot, construction ridge etc. as adjacent list
Migration path system and associated life, storage, lid relationship are emphasized, i.e., it has been found that oil to degrade line as boundary in the line of demarcation of member, massif
The globality and inseparability of hiding, but Oil Reservoir Types difference is big in an oil-accumulating unit, discomfort shares unified exploration theory
It is evaluated with technology, is only suitable for making resource assessment；Third is that exploration play, using main transporting route as backbone, with fluid point
Separate slot, construction saddle, construction vertex are boundary, guarantee the integrality for transporting poly- system, it emphasizes genetic relationship between source, defeated, circle
And Spatial Coupling, realization are association of activity and inertia, and are suitable for the exploration middle and later periods, to basin oil sources, transporting and the clear premise of reservoir forming knowledge
Under three-dimensional exploration.
The above finding shows that the division for exploring unit is with exploration development, geological knowledge and the change for disposing thinking
Change and change, adaptable with locating exploration phase and exploration ability, therefore, it is dynamic for exploring the division of unit.With
The raising of degree of prospecting, the division for exploring unit should be finer.Such as the Dongying Depression of Jiyang depression, by the end of the year 2017, three
Tie up earthquake coverage rate 100%, 0.41 mouthful/km of prospect pit density2, oil gas verifies, the sum of controlled geological reserves have accounted for total resources
64.3%, reach high-extra-high degree of prospecting stage.But the exploration between different configuration Petrographic zone, different series of strata exists apparent
Lack of uniformity, the sub- section and above series of strata degree of prospecting is high, exploration knowledge is relatively clear on s_4 formation, exploration enters " empty with reserves
White area " fine granularing scalability has verified area and re-recognizes the stage, and exploration object is smaller, scattered, hidden, and tectofacies zone has been not suitable for exploring
Demand；The degree of prospecting of sub- section and its following series of strata and corresponding area is lower under s_4 formation.Therefore series of strata, subdivision area need to be segmented
Band, divides exploration layer unit, and the otherness of prominent exploration finds out the exploration critical issue for restricting each exploration layer unit, to survey
It visits tackling key problem research and efficient deployment proposes direction.For this purpose, we have invented a kind of divisions of high degree of prospecting area exploration layer unit
Method, to adapt to current exploration phase and Exploratory situation.
Summary of the invention
The object of the present invention is to provide a kind of strong operability, division result directly applies to current exploratory area fine granularing scalability
The division methods of high degree of prospecting area exploration layer unit.
The purpose of the present invention can be achieved by the following technical measures: the division side of high degree of prospecting area exploration layer unit
The division methods of method, the high degree of prospecting area exploration layer unit include: step 1, according to areal geology data combination exploration situation
Evaluation result determines the purpose series of strata splitting scheme in suitable basin or the exploration demand that is recessed；Step 2, compilation target zone structural map,
It is distributed according to second level control band tomography and main Sedimentary Facies, divides target zone second configuration Petrographic zone；Step 3, in target zone two
In grade tectofacies zone, according to three-level fracture, the distribution of construction ridge, tectonic valley, the third grade structure list by construction control is marked off
Member；Step 4, compilation deposition phase-plane diagram and reservoir thickness isogram, is distributed according to sedimentary facies and reservoir thickness, mark off by
The facies-controlled sedimentation unit boundary of rock；Step 5, compilation divides Oil Reservoir Types (construction class, lithology class, stratum class and buried hill class) to send out
Existing oil and gas reserves (proved reserves, control reserve and prognostic reserves) and Fluid pressure coefficient overlap flat distribution map, analyzing oil and gas
Source dissects hydrocarbon carrier system, divides oil sources+transporting condition control Accumulation unit；Step 6, overlap structural unit,
Sedimentation unit, the poly- dividing elements figure of fortune, based on structural unit, in conjunction with different units Exploration Domain, deployment thinking technical side
The difference of method, final comprehensive determining exploration strata elementary boundary.
The purpose of the present invention can be also achieved by the following technical measures:
In step 1, existing in conjunction with the exploration of different series of strata according to drilling well, well logging and seismic data for high degree of prospecting area
The combing of shape is evaluated, and determines the target zone geological layering splitting scheme for being suitble to current exploration demand；Geological layering is according to deposition
Interruption, Deformation And Metamorphism, feature difference of Magmatic Emplacement In Relation etc. separate several techonospheres, carry out target zone according to exploration deployment demand
System divides, and is at most equivalent to third-band sequence.
In step 2, compilation target zone structural map is heavy to divide according to second level control band tomography and the distribution of main Sedimentary Facies
Product unit boundary；Tectofacies zone is served as theme with second-order structure zone, considers sedimentary facies belt integrality, emphasizes that garden basin constructs
The zone that the characteristics of control deposition, deposition control oil pool distribution and enrichment divides.
In step 3, it in target zone second configuration Petrographic zone, is broken according to three-level, the distribution of construction ridge, tectonic valley,
Mark off the third-level tectonic element by construction control；Construction ridge refers to due to the positive structure that the attitude of rocks changes and is formed
Crestal line；Tectonic valley refers to construction trend and the construction consistent valley floor of line.
In step 4, compilation deposition phase-plane diagram and reservoir thickness isogram, according to deposition phase boundray and reservoir thickness
Distributional difference is marked off by the facies-controlled sedimentation unit boundary of rock.
In steps of 5, compilation divides the discovered reserve and Fluid pressure overlapping flat distribution map of Oil Reservoir Types, analyzing oil and gas
Source dissects hydrocarbon carrier system, divides oil sources+transporting condition control Accumulation unit.
In step 6, the division figure for overlapping structural unit, sedimentation unit, the poly- unit of fortune, based on structural unit boundary,
In conjunction with different units Exploration Domain, the difference of deployment thinking technical method, final comprehensive determining exploration strata elementary boundary.
High degree of prospecting area exploration strata dividing elements method in the present invention, according to regions such as drilling well, well logging and earthquakes
Matter data determines the purpose series of strata geology in suitable basin or the exploration demand that is recessed in conjunction with degree of prospecting, awareness combing evaluation
It is layered splitting scheme；Compilation target zone structural map is distributed according to second level control band tomography and main Sedimentary Facies, division Depression Belt,
The tectofacies zones such as actic region and gentle slope belt, enveloping outer enclosure are stratal pinch-outs line or adjoining area boundary line；In target zone second level
In tectofacies zone, according to three-level fracture, the distribution of construction ridge, tectonic valley, the main third grade structure by construction control is marked off
Unit；Compilation deposits phase-plane diagram, according to sedimentary facies distribution, marks off by the facies-controlled sedimentation unit boundary of rock；Compilation point oil
Hide type discovered reserve, Fluid pressure overlaps flat distribution map, analyzing oil and gas source, anatomy hydrocarbon carrier system, division oil
Source+transporting condition control Accumulation unit；Structural unit, sedimentation unit, the poly- unit of fortune are overlapped, is explored in conjunction with different units
Field, the difference for disposing thinking technical method, it is comprehensive to determine exploration strata elementary boundary.This method has adapted to current degree of prospecting
With deployment situation, entire method strong operability, division result directly applies to the fine granularing scalability in current exploratory area, and in-depth is visited
Area's petroleum geology rule recognizes again, specify exploratory area exploration layer unit at hiding otherness and enrichment discipline, specify nearly mid-term increasing the storage,
Break through direction and emphasis research direction all have important guiding effect.
Detailed description of the invention
Fig. 1 is the flow chart of a specific embodiment of high degree of prospecting area exploration strata dividing elements method of the invention；
Fig. 2 is target zone layer thickness division schematic diagram in a specific embodiment of the invention；
Fig. 3 is tectofacies zone division result figure in a specific embodiment of the invention；
Fig. 4 is target zone third-level tectonic element division result figure in a specific embodiment of the invention；
Fig. 5 is target zone sedimentation unit division result figure in a specific embodiment of the invention；
Fig. 6 is that target zone transports poly- dividing elements result figure in a specific embodiment of the invention；
Fig. 7 is to comprehensively consider construction, deposition in a specific embodiment of the invention, transport the exploration layer unit that aggressiveness system divides
Result figure.
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 the flow charts of high degree of prospecting area exploration strata dividing elements method of the invention.
Suitable basin or recess exploration are determined according to areal geology data combination exploration situation evaluation result in step 101
The purpose series of strata splitting scheme of demand.For high degree of prospecting area, the division of geological layering scheme is comparative maturity, according to brill
The data such as well, well logging and earthquake and degree of prospecting, awareness analysis are as a result, determine that the target zone for being suitble to current exploration demand is drawn
Offshoot program；Geological layering is to separate several techonospheres, root according to sedimentary break, Deformation And Metamorphism, Magmatic Emplacement In Relation feature difference etc.
It is divided according to exploration deployment demand, it is at most equivalent to third-band sequence in principle.According to Fig.2, Dongying Depression stratum from
Lower mainly to have hole shop group, SHAHEJIE FORMATION, Dongying Formation and Guantao group upwards, wherein SHAHEJIE FORMATION is divided into four sub- sections, i.e. sand four again
Section (including on s_4 formation under sub- section and s_4 formation sub- section), dune shape (including sub- section, dune shape Central Asia section and sand three on dune shape
The lower sub- section of section), shaerbuer mountain and S_1 Formation.Different intervals has apparent difference in lithology and log, explores journey
Degree, awareness also have different.Process enters step 102.
By taking a certain target zone exploration strata dividing elements as an example, this selects Es4 upper sub-member.In step 102, compilation purpose
Layer structural map divides tectofacies zone according to distribution of the second level control with tomography and main Sedimentary Facies that target zone is developed；Construction
Petrographic zone is served as theme with second-order structure zone, considers sedimentary facies belt integrality, emphasizes garden basin construction control deposition, deposition oil-control
The zone that the characteristics of hiding distribution and enrichment divides.According to Fig.3, according to the second level tomography of layer structural map, Dongying Depression is drawn
The tectofacies zones such as actic region, Depression Belt and gentle slope belt are separated, enveloping outer enclosure is stratal pinch-outs line or adjoining area boundary line (figure
3).Process enters step 103.
It marks off and is constructed according to three-level fracture, the distribution of construction ridge and tectonic valley in tectofacies zone in step 103
The main third-level tectonic element of control；Construction ridge refers to the crestal line due to the positive structure that the attitude of rocks changes and is formed；
Tectonic valley refers to trend and the construction consistent valley floor of line.According to Fig.4, on the basis of tectofacies zone divides, according to construction ridge
And tectonic valley, mark off third-level tectonic element (Fig. 4).Process enters step 104.
It is distributed according to sedimentary system, division unit boundary, i.e., on the basis of compilation target zone deposits phasor in step 104
Sedimentation unit boundary (Fig. 5).Process enters step 105.
In step 105, compilation divides Oil Reservoir Types (construction class, lithology class, stratum class and buried hill class) it has been found that oil and gas reserves
(proved reserves, control reserve and prognostic reserves) and Fluid pressure coefficient overlap flat distribution map, and analyzing oil and gas source dissects oil
Gas migration path system divides oil sources+transporting condition control Accumulation unit.Accumulation unit refers to relatively unambiguous
Oil-gas-source, transporting condition, the Gas Accumulation geologic element (Fig. 6) based on certain a kind of Oil Reservoir Types.Process enters step
106。
In step 106, overlap the division of structural unit, sedimentation unit, the poly- unit of fortune, in conjunction with different units Exploration Domain,
The difference of thinking technical method is disposed, it is comprehensive to determine exploration strata elementary boundary.Exploration layer unit is that same techonosphere or construction are sub-
In layer, based on two, third grade structure band, degree of prospecting, awareness are comprehensively considered, division has relatively uniform construction
System, sedimentary system, Gas Accumulation system potentiality geologic element.In Dongying Depression structural unit, sedimentation unit, the poly- unit of fortune
On the basis of division, the relative independentability of construction, sedimentary system relative fullness, pool forming system is considered, it is comprehensive to determine exploration strata
Elementary boundary (Fig. 7).
Basin or the different target zones of recess are surveyed using the division methods of exploration layer unit in high degree of prospecting area of the invention
It visits unit to be divided and named, carries out Resource Potential by exploration layer unit, Exploration Domain is classified, exploration theory technology is suitable
The analysis of answering property explores effect assessment and explores research and deployment evaluation, so that surplus resources are distributed with Oil Reservoir Types more in plane
It is clear to add, on section different layers system reservoir forming factor and Dominated Factors definitely, spatially oil gas differential enrichment and key technology
Using more targeted with tackling key problem.Carry out exploration research as basic unit by exploration strata dividing elements and to explore layer unit,
Fine granularing scalability and the scientific management in basin or the mature exploration phase that is recessed can be achieved.The division methods of the exploration layer unit will explore
Theoretical research and exploration practices are combined closely, using this method divide exploration layer unit facilitate deepen exploratory area difference series of strata,
Different regions key factor for reservoir element recognizes again, specifies exploratory area difference series of strata, different regions into the otherness and enrichment discipline of hiding, can
Strong operability provides a kind of new research and unit evaluation idea and method for old area exploration, for entire China mature exploration area,
Or even Petroleum Geology Theory development has important theory and realistic meaning.
The foregoing is merely presently preferred embodiments of the present invention, non-to limit the scope of the patents of the invention, other are with this
The equivalence changes of the patent spirit of invention should all belong to the scope of the patents of the invention.
Claims (7)
1. high degree of prospecting area exploration strata dividing elements method, which is characterized in that the high degree of prospecting area exploration strata dividing elements
Method includes:
Step 1, according to areal geology data combination exploration situation evaluation result, the mesh in suitable basin or the exploration demand that is recessed is determined
Series of strata splitting scheme；
Step 2, compilation target zone structural map is distributed according to second level control band tomography and main Sedimentary Facies, divides target zone second level
Tectofacies zone；
Step 3, in target zone second configuration Petrographic zone, according to three-level fracture, construction ridge, tectonic valley distribution, mark off by
Construct the third-level tectonic element of control；
Step 4, compilation deposition phase-plane diagram and reservoir thickness isogram, are distributed according to sedimentary facies and reservoir thickness, mark off
By the facies-controlled sedimentation unit boundary of rock；
Step 5, compilation divides Oil Reservoir Types to have found that oil and gas reserves and Fluid pressure coefficient overlap flat distribution map, and analyzing oil and gas comes
Source dissects hydrocarbon carrier system, divides oil sources+transporting condition control Accumulation unit；
Step 6, structural unit, sedimentation unit, the poly- dividing elements figure of fortune are overlapped, based on structural unit, in conjunction with different units
Exploration Domain, the difference for disposing thinking technical method, final comprehensive determining exploration strata elementary boundary.
2. high degree of prospecting area exploration strata dividing elements method according to claim 1, which is characterized in that in step 1,
High degree of prospecting area is evaluated in conjunction with the combing of different series of strata exploration situations, determined according to drilling well, well logging and seismic data
It is suitble to the target zone geological layering splitting scheme of current exploration demand；Geological layering is according to sedimentary break, Deformation And Metamorphism, magma
Feature difference of invasion etc. separates several techonospheres, carries out the division of purpose series of strata according to exploration deployment demand, is at most equivalent to
Third-band sequence.
3. high degree of prospecting area exploration strata dividing elements method according to claim 1, which is characterized in that in step 2,
Compilation target zone structural map, according to second level control band tomography and the distribution of main Sedimentary Facies to divide sedimentation unit boundary；Tectonite
Facies tract is served as theme with second-order structure zone, considers sedimentary facies belt integrality, emphasizes garden basin construction control deposition, deposition oil-control hiding
The zone that the characteristics of distribution and enrichment divides.
4. high degree of prospecting area exploration strata dividing elements method according to claim 1, which is characterized in that in step 3,
In target zone second configuration Petrographic zone, according to three-level fracture, the distribution of construction ridge, tectonic valley, mark off by construction control
Third-level tectonic element；Construction ridge refers to the crestal line due to the positive structure that the attitude of rocks changes and is formed；Tectonic valley refers to structure
Make trend and the construction consistent valley floor of line.
5. high degree of prospecting area exploration strata dividing elements method according to claim 1, which is characterized in that in step 4,
Compilation deposits phase-plane diagram and reservoir thickness isogram, according to deposition phase boundray and reservoir thickness distributional difference, mark off by
The facies-controlled sedimentation unit boundary of rock.
6. high degree of prospecting area exploration strata dividing elements method according to claim 1, which is characterized in that in steps of 5,
Compilation divides Oil Reservoir Types discovered reserve, Fluid pressure overlapping flat distribution map, and analyzing oil and gas source dissects petroleum conduction body
System divides oil sources+transporting condition control Accumulation unit.
7. high degree of prospecting area exploration strata dividing elements method according to claim 1, which is characterized in that in step 6,
The division figure for overlapping structural unit, sedimentation unit, the poly- unit of fortune explores neck in conjunction with different units based on structural unit boundary
Domain, the difference for disposing thinking technical method, final comprehensive determining exploration strata elementary boundary.
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