CN105653834A - Sequence stratum principle-based faulting instantaneous activity quantification calculating method - Google Patents
Sequence stratum principle-based faulting instantaneous activity quantification calculating method Download PDFInfo
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Abstract
The invention provides a sequence stratum principle-based faulting instantaneous activity quantification calculating method. The sequence stratum principle-based faulting instantaneous activity quantification calculating method includes the steps: a step 1, analyzing a source direction; a step 2, establishing a sequence stratum profile; a step 3, performing isochronous stratum unit subdivision to obtain an isochronous stratum unit subdivision geological profile; a step 4, determining instantaneous time through the isochronous stratum unit subdivision geological profile; a step 5, getting faulting activity parameters through the isochronous stratum unit subdivision geological profile; and a step 6, drawing a relevant map according to the obtained faulting activity parameters, and completing quantitative calculation of a faulting instantaneous activity of a research area. Based on the sequence stratum principle-based faulting instantaneous activity quantification calculating method, the faulting activity, pool-forming elements and petroleum reservoir are organically integrated, and technical supports are provided for quantitative research on control effect of a faulting episodic activity on a sedimentary reservoir, hydrocarbon generation evolution, petroleum transportation and petroleum accumulation.
Description
Technical field
The present invention relates to fracture Transient activity quantitative Analysis correlation theory research, technology application and oil-gas field geology Exploration Domain, especially relate to a kind of fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle.
Background technology
The most important structural feature of continental faulted basins is to rupture extremely to grow, and the curtain type activity of fracture has run through the overall process of the structural evolution of continental faulted basins, deposit filling, Hydrocarbon Formation Reservoirs. The fault activities of depositional phase controls formation and the distribution of the cycle of sedimentation, reservoir and hydrocarbon source rock, becomes the fault activities in Tibetan stage that the episode filling of petroleum conduction and oil gas is had important function, and therefore, the curtain type activity history of research fracture is significant. Quantitatively, dynamically, historic survey be the developing direction of petroleum geology research, and the quantitative study of the curtain type activity ruptured relates to less. At present, the main method studying the activeness of growth fault has growth index and the growth fault drop two kinds of tomography. Fault growth index reflection faulting relative intensity, it is impossible to the size of the activity of true reflection fracture, and when lower wall lacuna, growth index is ��, loses geological Significance. Growth fault drop reflects long period accumulation activity total amount size, it is impossible to the change of reflection Transient activity or activity rate. And person all can not the curtain type activity history of accurate expression fracture, seriously constrain fracture curtain type activity and the quantitative study to reservoir forming factor and Filling process thereof. We have invented a kind of new fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle for this, solve above technical problem.
Summary of the invention
It is an object of the invention to provide a kind of be applied in the actual exploration process in oil field to rupture curtain type activity to deposition reservoir, become hydrocarbon to develop and the fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle of control action of petroleum conduction.
The purpose of the present invention can be achieved by the following technical measures: based on the fracture Transient activity quantitative calculation method of SEQUENCE STRATIGRAPHIC principle, should include based on the fracture Transient activity quantitative calculation method of SEQUENCE STRATIGRAPHIC principle: step 1, and carry out matter element system analysis;Step 2, sets up SEQUENCE STRATIGRAPHIC section; Step 3, stratigraphic unit segmentation when carrying out waiting, stratigraphic unit segmentation geologic section when obtaining waiting; Step 4, stratigraphic unit segmentation geologic section during utilization etc., it is determined that instantaneous time; Step 5, during utilization etc., stratigraphic unit segmentation geologic section, asks for faulting parameter; And step 6, according to the faulting parameter asked for, draw relevant map, complete the quantitative Analysis of study area fracture Transient activity.
The purpose of the present invention realizes also by following technical measures:
In step 1, carry out sedimentary facies research and Analysis on depositional system, specify main matter element system and spatial dimension that sedimentary system involves.
In step 2, along main matter element system, set up well-shake even well profile, utilize seismic reflection lineups top/baselap, cut and cut feature and brill/well-log information identification sequence interface, flood surface or deposition conversion surface, pass through interpretive tracing, set up SEQUENCE STRATIGRAPHIC section, it is determined that accretion, move back long-pending and progradation unit spatial distribution.
In step 3, with seismic event, attitude of stratum for constraint, in accretion, move back in long-pending, progradation unit, stratigraphic unit segmentation when carrying out waiting, by Time-depth conversion and compaction correction, stratigraphic unit segmentation geologic section when obtaining waiting.
In step 4, stratigraphic unit segmentation geologic section when utilizing etc., asks for the area of stratigraphic unit during each differential etc., utilizes stratigraphical time table, determine sequence top, bottom interface absolute age numerical value as instantaneous time obligatory point, the instantaneous time that when asking for etc., stratigraphic unit deposition is used.
In steps of 5, stratigraphic unit segmentation geologic section during utilization etc., reads the thickness of stratigraphic unit during the differential etc. near upper and lower two dishes of tomography, asks for the instantaneous drop of tomography and these parameters of fault activity ratio.
In step 6, draw relevant map according to the instantaneous drop of the tomography asked for, accumulation drop, up/down dish sedimentation rate, these parameters of fault activity ratio, change over figure including upper lower burrs sedimentation rate, fault activity ratio changes over figure, instantaneous drop changes over figure, accumulation drop changes over figure.
The fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle in the present invention, based on SEQUENCE STRATIGRAPHIC principle, utilizes the information being stored in geologic(al) formation, carrys out the instantaneous activity of study of fault. Concrete operations flow process includes matter element system analysis, SEQUENCE STRATIGRAPHIC section is set up, etc. time 6 steps such as stratigraphic unit segmentation, instantaneous time is determined, faulting parameter is asked for, relevant About Drawing Figures. Should based on the fracture Transient activity quantitative calculation method of SEQUENCE STRATIGRAPHIC principle, calculated by tomography Transient activity parameter quantitative, with the time for tie, fault activities is combined with reservoir forming factor and oil-gas reservoir, for fracture curtain type activity to depositing reservoir, becoming hydrocarbon evolution, petroleum conduction and become to hide the quantitative study offer technical method of control action.
Accompanying drawing explanation
Fig. 1 is the flow chart of a specific embodiment of the fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle of the present invention;
Fig. 2 be the present invention a specific embodiment in cave in sequence stratigraphic section and sedimentation rate of A calculate a some location drawing;
Fig. 3 be the present invention a specific embodiment in A cave in X group section deposition period diverse location sedimentation rate time history;
Fig. 4 be the present invention a specific embodiment in A cave in the X group instantaneous drop of section B tomography, add up drop time chart;
Fig. 5 be the present invention a specific embodiment in A cave in X group section B hanging wall sedimentation rate time history.
Detailed description of the invention
For making the above and other purpose of the present invention, feature and advantage to become apparent, cited below particularly go out preferred embodiment, and coordinate institute's accompanying drawings, be described in detail below.
As it is shown in figure 1, the flow chart of the fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle that Fig. 1 is the present invention.
In step 101, carry out matter element system analysis.
Carry out sedimentary facies research and Analysis on depositional system, specify main matter element system and spatial dimension that sedimentary system involves. A West Depression south X group section major developmental delta sedimentary system, thing source is advanced by direction northeastward, southwest, and deposition feeds through to Depression Centers position. Flow process enters into step 102.
In step 102, carry out the foundation of SEQUENCE STRATIGRAPHIC section.
Along north north east direction, principal goods source, set up well-shake even well profile (deposit starting point from X group section and involve solstics to sedimentary system), utilize seismic reflection lineups top/baselap, cut and cut feature and brill/well-log information identification sequence interface, flood surface or deposition conversion surface, pass through interpretive tracing, set up SEQUENCE STRATIGRAPHIC section, it is determined that accretion, move back long-pending and progradation (datum level raising and lowering hemicycle) unit spatial distribution. Flow process enters into step 103.
In step 103, stratigraphic unit segmentation when carrying out waiting.
With seismic event, attitude of stratum for constraint, in accretion, move back in long-pending, progradation unit (system tract or datum level hemicycle), stratigraphic unit segmentation when carrying out waiting, by Time-depth conversion and compaction correction, stratigraphic unit segmentation geologic section when obtaining waiting. Dune shape sequence is subdivided into stratigraphic unit during 18 grades by experiment section. Owing to system tract or the datum level hemicycle of sequence are successive sedimentation, in theory, in attitude of stratum under constraint, when waiting, stratum differentiation element can be infinitely small.
For 3,4 grades and following rank sequence unit, it is proposed that hypothesis below:
(1) geologic body is internal is successive sedimentation, is interrupted and is only limitted in sequence boundaries;
(2) same thing source system, same sequence or the cycle of sedimentation, sediment supply rate stabilization;
(3) same sequence or the cycle of sedimentation, when waiting, stratigraphic unit volume is directly proportional to main matter element system sectional area.
Flow process enters into step 104.
In step 104, carry out instantaneous time and determine.
Stratigraphic unit segmentation geologic section when utilizing etc., asks for the area of stratigraphic unit during each differential etc., utilizes according to stratigraphical time table, it is determined that sequence top, bottom interface absolute age numerical value as instantaneous time obligatory point. According in step 103 it is assumed that suppose successive sedimentation body in a certain given historical time, it is possible to mark off n instantaneous stratigraphic unit when waiting, the instantaneous time that during i-th etc., stratigraphic unit deposition is used is:
Wherein: t0And tnThe absolute age value that respectively top of successive sedimentation body, the end are corresponding; siRespectively during i-th etc. stratigraphic unit at main matter element system sectional area.
The instantaneous moment that during i-th etc., stratigraphic unit deposition is corresponding when terminating is:
Formula is utilized 1. 2. to calculate the momentary interval of stratigraphic unit deposition during each differential etc. and the absolute age on top, bottom interface. Flow process enters into step 105.
In step 105, carry out faulting parameter and ask for. According in step 103 it is assumed that suppose the successive sedimentation body in a certain given historical time, it is possible to mark off stratigraphic unit during n instantaneous grade, utilize geologic(al) formation information computed tomography growth rate method as follows:
During i-th etc. during stratigraphic unit body deposition, the upper and lower dish sedimentation rate of tomography and fault activity ratio are respectively as follows:
Hanging wall sedimentation rate:Formula is 3.
Footwall sedimentation rate:Formula is 4.
Fault activity ratio:Formula is 5.
Wherein: Vi��vi��vfi, respectively i-th etc. time stratigraphic unit deposition time fault activity ratio;HiAnd hiRespectively stratigraphic unit upper and lower dish formation thickness during i-th etc.; �� tiThe instantaneous time that during for i-th etc., stratigraphic unit deposition is used.
Stratigraphic unit segmentation geologic section when utilizing etc., reads the thickness of stratigraphic unit during the differential etc. near upper and lower two dishes of tomography, utilizes formula 3. 4. 5. to ask for the parameters such as sedimentation rate, fault activity ratio, instantaneous drop, accumulation drop. Flow process enters into step 106.
In step 106, carry out relevant About Drawing Figures.
Relevant map can be drawn according to parameters such as the instantaneous drop of the tomography asked for, accumulation drop, up/down dish sedimentation rate, fault activity ratios. As upper lower burrs sedimentation rate change over figure, fault activity ratio changes over figure, instantaneous drop changes over figure, accumulation drop changes over figure etc. Thus completing the quantitative Analysis of study area fracture Transient activity.
In a specific embodiment of the application present invention, object of study be the B tomography of A depression at Paleogene System X group section growth rate and Transient activity quantitative parameter analysis, comprehensively think that this depression is continental faulted basins by geologic information. By many-sided Information integration analysis such as well data, seismic data and analytical test, specify that the spatial dimension that main matter element system and sedimentary system involve. Along main matter element system, set up well-shake even well profile (auto-deposition starting point involves solstics to sedimentary system), stratigraphic unit segmentation when carrying out waiting, by Time-depth conversion and compaction correction, stratigraphic unit segmentation geologic section when obtaining waiting, sequence is subdivided into stratigraphic unit during 18 grades, as shown in Figure 2.
Stratigraphic unit segmentation geologic section when utilizing etc., reads the thickness of stratigraphic unit during the differential etc. near upper and lower two dishes of tomography, utilizes formula 3. 4. 5. to ask for the parameters such as sedimentation rate, fault activity ratio, instantaneous drop, accumulation drop, as shown in table 1.
Table 1A caves in X group section B fault activity parameter result of calculation
Growth rate and instantaneous activity to the B tomography that A caves in work out corresponding map (upper dish sedimentation rate changes over figure, fault activity ratio changes over figure, instantaneous drop changes over figure, accumulation drop changes over figure), as shown in Fig. 3, Fig. 4, Fig. 5. These maps can express the quantization characteristic of faulting intuitively, for study of fault curtain type activity and to deposition, become hide control action significant.
The fracture Transient activity quantitative calculation method for growth fault in the present invention, analyzes, with building, the fault activity ratio computational methods combined based on SEQUENCE STRATIGRAPHIC. It uses SEQUENCE STRATIGRAPHIC principle, according to the information being stored in geologic(al) formation, carrys out the instantaneous activity of study of fault, just can the Changing Pattern of inverting tomography Transient activity amount and activity rate according to being retained in sedimentary record the information such as formation thickness, Fill models. Define a kind of fairly perfect, easy and simple to handle, be suitable to the fracture Transient activity quantitative calculation method of production deployment, can in oil field prospecting is disposed wide variety of fracture Transient activity quantitative calculation method. Perfect further fault activity research method, for fracture curtain type activity to deposition reservoir, become hydrocarbon to develop, petroleum conduction and become to hide the quantitative study of control action and provide new Research Thinking and technological means. The method is primarily adapted for use in the fracture Transient activity quantitative Analysis of continental faulted basins active fault. The fracture Transient activity quantitative result that application the method completes, can study, for deposition reservoir, one-tenth hydrocarbon evolution, Hydrocarbon Formation Reservoirs, the directive function providing strong.
Claims (7)
1. based on the fracture Transient activity quantitative calculation method of SEQUENCE STRATIGRAPHIC principle, it is characterised in that should include based on the fracture Transient activity quantitative calculation method of SEQUENCE STRATIGRAPHIC principle:
Step 1, carries out matter element system analysis;
Step 2, sets up SEQUENCE STRATIGRAPHIC section;
Step 3, stratigraphic unit segmentation when carrying out waiting, stratigraphic unit segmentation geologic section when obtaining waiting;
Step 4, stratigraphic unit segmentation geologic section during utilization etc., it is determined that instantaneous time;
Step 5, during utilization etc., stratigraphic unit segmentation geologic section, asks for faulting parameter;
Step 6, according to the faulting parameter asked for, draws relevant map, completes the quantitative Analysis of study area fracture Transient activity.
2. the fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle according to claim 1, it is characterised in that in step 1, carry out sedimentary facies research and Analysis on depositional system, specifies main matter element system and spatial dimension that sedimentary system involves.
3. the fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle according to claim 1, it is characterized in that, in step 2, along main matter element system, set up well-shake even well profile, utilize seismic reflection lineups top/baselap, cut and cut feature and brill/well-log information identification sequence interface, flood surface or deposition conversion surface, pass through interpretive tracing, set up SEQUENCE STRATIGRAPHIC section, it is determined that accretion, move back long-pending and progradation unit spatial distribution.
4. the fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle according to claim 1, it is characterized in that, in step 3, with seismic event, attitude of stratum for constraint, in accretion, move back in long-pending, progradation unit, stratigraphic unit segmentation when carrying out waiting, by Time-depth conversion and compaction correction, stratigraphic unit segmentation geologic section when obtaining waiting.
5. according to claim 1 for the fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle, it is characterized in that, in step 4, utilize etc. time stratigraphic unit segmentation geologic section, ask for the area of stratigraphic unit during each differential etc., utilize stratigraphical time table, it is determined that sequence top, bottom interface absolute age numerical value as instantaneous time obligatory point, the instantaneous time that when asking for etc., stratigraphic unit deposition is used.
6. the fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle according to claim 1, it is characterized in that, in steps of 5, utilize etc. time stratigraphic unit segmentation geologic section, read the thickness of stratigraphic unit during the differential etc. near upper and lower two dishes of tomography, ask for the instantaneous drop of tomography and these parameters of fault activity ratio.
7. the fracture Transient activity quantitative calculation method based on SEQUENCE STRATIGRAPHIC principle according to claim 1, it is characterized in that, in step 6, draw relevant map according to the instantaneous drop of the tomography asked for, accumulation drop, up/down dish sedimentation rate, these parameters of fault activity ratio, change over figure including upper lower burrs sedimentation rate, fault activity ratio changes over figure, instantaneous drop changes over figure, accumulation drop changes over figure.
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