CN113917557A - Identification method of fan between gravel rock mass fans - Google Patents
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- 238000011161 development Methods 0.000 claims abstract description 20
- 239000013049 sediment Substances 0.000 claims abstract description 19
- 238000004088 simulation Methods 0.000 claims abstract description 13
- 230000004044 response Effects 0.000 claims abstract description 10
- 230000008021 deposition Effects 0.000 claims description 12
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Abstract
The invention provides a method for identifying a fan between gravel rock mass fans, which comprises the following steps: step 1, carrying out ancient landform restoration by using seismic data, and determining the plane position of inter-fan development; step 2, carrying out petrology characteristic research on logging and logging information of the fan-to-fan actual drilling well, and determining lithofacies characteristics of the fan-to-fan; step 3, researching the logging response characteristics of the fan-fan actual drilling well among the fans, and determining the logging phase characteristics of the fan among the fans; step 4, researching a fan-fan sediment mode of the gravel rock mass based on geological research and seismic reflection characteristic research, and establishing a fan-fan sediment model; step 5, forward seismic record characteristic simulation is carried out on the fan-fan sediment model to obtain the seismic reflection characteristics of the fan-fan of the gravel rock mass; and 6, comprehensively establishing a seismic and geological identification quantity version of the fan between the gravel rock mass fans. The identification method of the fan between the gravel rock mass fans provides a simple and easy identification method for the identification of the fan between the gravel rock mass fans.
Description
Technical Field
The invention relates to the field of oil field exploration and development, in particular to a method for identifying a fan between gravel rock mass fans.
Background
east-Ying depressed steep slope zone with Jiyang depression forms various types of glutenite sector sediments under the complex structural background, the glutenite sector sediments respectively have different lithology, electrical property and seismic identification characteristics, and the major reservoir type of the steep slope zone is formed by regular combination, superposition and distribution along the steep slope zone. The north side of the lake basin is a high bulge, which provides an adequate source for the inner descent tray. Along with the continuous progress of basin collapse activity and block motion, mountain rivers carry a large amount of land source debris substances to enter the lake basin through the cliff, the rapid unloading is carried out, the deposition of the fan bodies is regularly combined and overlapped from the depression to the basin edge, and the combination characteristics of the fan bodies are different along with the difference of steep slope bedrock inclination patterns and the strength change of later structural evolution. In general terms, a complete or incomplete gravel rock mass deposition sequence from alluvial fan-fan delta-deep water turbidity fan is formed in space. In the longitudinal direction, the fan bodies formed at different periods gradually recede from old to new and are sequentially overlapped, and the direction of the high point migration of the fan body structure at each period is the object source direction. On the plane, each phase zone of each stage fan body gradually moves towards the convex direction, and the vertical direction is from bottom to top represented as a fan root, a fan middle and a fan end, so that a vertical sequence which becomes thin and thin upwards is formed. Along with the continuous deepening of geological knowledge, a series of earthquake prediction technologies are established for medium-deep gravel rock masses, geological knowledge that the ditch and the fan correspond to each other and the fan and the overlapped connecting sheet are arranged among the fans is obtained, a deposition and oil-gas accumulation mode of the gravel rock mass on the steep slope is established, and the exploration and development of the oil-gas accumulation of the gravel rock mass are guided powerfully. In recent years, a batch of exploration wells are deployed in east camps aiming at the sector bodies between the sectors which develop between the gravel rock sectors, part of wells obtain good drilling and production effects, and a batch of control and exploration reserves are reported, so that the exploration of the sectors between the gravel rock sectors becomes a new main force for the exploration of the steep slope gravel rock oil deposit. However, a certain loss of interest well appears in the exploration process, and the loss of interest is found through analysis because the low part of the side edge of the main fan is drilled and meets the really independent fan-fan, and the loss of interest is caused. Therefore, the emphasis of inter-sector fan exploration is to identify the true inter-sector fans.
Therefore, a novel identification method for the fans among the gravel rock mass fans is invented, and the technical problems are solved.
Disclosure of Invention
The invention aims to provide a simple and convenient gravel rock sector earthquake geological recognition method, which is used for carrying out logging, well logging and earthquake reflection characteristic research on actual drilling of sectors among sectors on the basis of comprehensively analyzing and explaining the earthquake to recover ancient landforms and determine the plane development position of the sectors among the sectors, and establishing a comprehensive recognition characteristic quantity version of lithofacies, well logging facies and earthquake reflection characteristics of the sectors among the gravel rock sectors.
The object of the invention can be achieved by the following technical measures: the identification method of the fan between the gravel rock mass fans comprises the following steps: step 1, carrying out ancient landform restoration by using seismic data, and determining the plane position of inter-fan development; step 2, carrying out petrology characteristic research on logging and logging information of the fan-to-fan actual drilling well, and determining lithofacies characteristics of the fan-to-fan; step 3, researching the logging response characteristics of the fan-fan actual drilling well among the fans, and determining the logging phase characteristics of the fan among the fans; step 4, establishing a fan-fan sediment model of the gravel rock mass based on the research on the fan-fan sediment mode of the gravel rock mass developed by the water tank experimental result and the real well seismic reflection characteristic; step 5, forward seismic record characteristic simulation is carried out on the fan-fan sediment model to obtain the seismic reflection characteristics of the fan-fan of the gravel rock mass; and 6, comprehensively establishing a seismic and geological identification quantity version of the fan between the gravel rock mass fans.
The object of the invention can also be achieved by the following technical measures:
in the step 1, firstly, real drilling wells and three-dimensional seismic data are utilized to establish an isochronal stratum framework, then an isochronal sequence thickness comparison method is utilized to restore ancient landforms to carry out fine restoration of the ancient landforms, the development characteristics of gravel rock sector bodies in a research area are comprehensively analyzed, and the development positions of the gravel rock sector bodies are determined according to the channel sector corresponding principle.
In step 2, rock characteristic research is carried out according to the well logging and well logging data of the sector actual drilling well among the sectors determined in the step 1, and the sector lithofacies characteristics among the sectors are determined.
In step 3, firstly, Fisher curve conversion is carried out on GR curves of a large number of actual drilling wells of the sector bodies among the sectors, well logging cycle characteristics of the actual drilling wells of the sector bodies among the sectors are determined, then detailed research is carried out on response characteristics of various well logging parameters in the cycle, and a well logging phase mark template of the sector bodies among the sectors is established.
In step 4, a fan-fan sediment model between the gravel rock mass is established based on the basin experiment result and the research of the fan-fan sediment model between the gravel rock mass developed by the seismic reflection characteristics of the actual drilling well.
In step 5, obtaining the speeds of different lithologies according to the inter-sector fan real drilling sound wave curve, converting the inter-sector fan geological model established in the step 4 into a speed model, and then carrying out seismic record forward modeling by using a wave equation algorithm and a vertical incidence method to obtain an inter-sector fan seismic reflection characteristic template.
In step 6, the lithofacies characteristics, the logging facies characteristics and the seismic reflection characteristics of the inter-sector fans obtained in the steps 2, 3 and 5 are utilized to finally establish an inter-sector seismic geological comprehensive identification characteristic quantity version.
The identification method of the fans among the gravel rock mass fans is used for determining lithofacies characteristics and logging facies characteristics of the fans among the gravel rock mass fans on the basis of carrying out comprehensive fine research on logging and logging information of actual drilling of the fans among the gravel rock mass fans on the basis of determining the plane development position of the fans among the fans by performing ancient landform restoration through comprehensive analysis and seismic interpretation. Based on the water tank simulation experiment result and the actual well drilling seismic reflection characteristic research, a deposition model of the fan between the gravel rock mass fans is established, forward seismic record simulation is carried out, and the seismic reflection characteristic of the fan between the fans is determined. Finally, the characteristic quantity plate for earthquake and geological identification of the fans among the gravel rock fans is comprehensively established, and a simple and feasible identification method is provided for identification of the fans among the gravel rock fans.
Drawings
FIG. 1 is a flow chart of one embodiment of the method of identifying a sector between gravel rock sectors of the present invention;
FIG. 2 is a seismic cross section of an established isochronous stratigraphic framework;
FIG. 3 is a topographic map of a deposition period;
FIG. 4 is a sectional view of a sector lithofacies between sectors of a gravel rock mass;
FIG. 5 is a Fisher curve and a convolution characteristic diagram of a real well of a fan-fan;
FIG. 6 is a schematic diagram of a gravel rock mass sector logging phase characteristic template;
FIG. 7 is an anatomical diagram of an experimental deposition pattern of a water bath with a movable bottom plate;
FIG. 8 is a schematic diagram of a cross section of a geological model of a fan sedimentary mode between sectors of a gravel rock mass;
FIG. 9 is a schematic diagram of a vertical section of a geological model of a fan sedimentary pattern between sectors of a gravel rock mass;
FIG. 10 is a schematic diagram of a gravel rock sector forward simulation seismic reflection characteristic template (cross section);
FIG. 11 is a schematic diagram of a gravel rock sector normal simulation seismic reflection characteristic template (longitudinal section);
FIG. 12 is a schematic diagram of a seismic geology comprehensive identification characteristic quantity version of a sector between gravel rock mass sectors.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
As shown in fig. 1, fig. 1 is a flow chart of the identification method of the sector between the gravel rock sectors of the invention.
The method comprises the steps of firstly establishing an isochronal stratum framework by using real drilling wells and three-dimensional seismic data, then restoring ancient landform by using an isochronal sequence thickness comparison method to carry out fine restoration of ancient landform, comprehensively analyzing and researching the development characteristics of gravel rock sector bodies in a research area, and determining the development positions of the gravel rock sector bodies according to a ditch sector corresponding principle.
Step 102: and carrying out the petrology characteristic research of the sector actual drilling between the sectors by using the logging and logging data, and determining the lithofacies characteristics of the sector between the sectors.
And (4) carrying out rock characteristic research according to the well logging and well logging data of the sector actual drilling well among the sectors determined in the step 101, and determining the sector lithofacies characteristics among the sectors.
Step 103: and carrying out inter-sector well logging response characteristic research by utilizing the well logging data, and determining inter-sector well logging phase characteristics.
Firstly, Fisher curve conversion is carried out on GR curves of a large number of actual drilling wells of the sector body between the sectors, well logging gyrating characteristics of the actual drilling wells of the sector body between the sectors are determined, then response characteristics of various well logging parameters in the gyrating are studied in detail, and a well logging phase mark template of the sector between the sectors is established.
And step 104, establishing a fan-fan sediment model of the gravel rock mass based on the research on the fan-fan sediment mode of the gravel rock mass developed by the water tank experimental result and the seismic reflection characteristic of the actual drilling well.
And establishing an inter-sector fan deposition mode model based on the deposition mode dissection result of the research area gravel rock movable bottom plate water tank simulation experiment result and the seismic reflection characteristics of the inter-sector fan body actual drilling well.
And 105, carrying out forward modeling on the seismic record by using the geological model obtained in the step 104, and defining a sector seismic reflection characteristic template.
And obtaining the speeds of different lithologies according to the inter-sector fan real drilling sound wave curve, converting the inter-sector fan geological model established in the step 104 into a speed model, and then carrying out seismic record forward modeling by using a wave equation algorithm and a vertical incidence method to obtain an inter-sector fan seismic reflection characteristic template.
And step 106, integrating the lithofacies characteristics, the logging facies characteristics and the seismic reflection characteristics obtained in the steps 102, 103 and 105 to comprehensively establish a seismic geological identification characteristic quantity version of the fan-to-fan.
And finally, comprehensively establishing a geological identification characteristic quantity version of the earthquake of the fans among the fans by using the lithofacies characteristics, the logging facies characteristics and the earthquake reflection characteristics of the fans among the fans obtained in the steps 102, 103 and 105.
The embodiment provides a recognition method of fans among gravel rock sectors, which is characterized in that on the basis of comprehensive analysis and seismic interpretation for ancient landform restoration and definition of the plane development position of the fan among the fans, research on the petrology characteristics and the logging response characteristics of logging and logging data of fan actual drilling among the gravel rock sectors is carried out, and the lithofacies characteristics and the logging facies characteristics of the fan among the fans are defined; the method comprises the steps of carrying out fan-fan sedimentary model research among the gravel rock mass fans based on three-dimensional seismic data and geological knowledge, establishing a fan-fan sedimentary model, and carrying out forward seismic record simulation on the model to obtain seismic reflection characteristics of the gravel rock mass fan-fan; and finally, comprehensively establishing a seismic and geological recognition characteristic quantity version of the fan between the glutenite fans.
In one embodiment of the present invention, the method comprises the following steps:
step 1, comprehensively analyzing and researching the development characteristics of the gravel rock sector bodies in the research area through an ancient landform restoration technology, and determining the sector plane development positions among the gravel rock sector bodies according to the ditch sector corresponding principle.
In the step 1, firstly, real drilling wells and three-dimensional seismic data are used for establishing an isochronal stratigraphic framework, then an isochronal sequence thickness comparison method (delta T-Tg-T7) is used for recovering an ancient landform method for fine recovery of the ancient landform, the development characteristics of the gravel rock sector in a research area are comprehensively analyzed, and the development position of the gravel rock sector is determined according to the corresponding principle of a trench sector. FIG. 2 is a seismic cross section of the created isochronous stratigraphic framework. FIG. 3 is a ancient topographic map of a deposition period, with the middle position of the two arrows being the inter-sector development position.
Step 2, carrying out petrology characteristic research on logging and logging information of the fan-to-fan actual drilling well, and determining lithofacies characteristics of the fan-to-fan;
in step 2, carrying out rock characteristic research on logging and logging data of a large number of actual drilled wells of the inter-sector sectors in the step 1, and determining inter-sector lithofacies characteristics. FIG. 4 is a sectional characteristic template of a sector lithofacies between sectors of a gravel rock mass.
And 3, carrying out research on the response characteristics of inter-sector well logging by using the well logging data of the inter-sector actual well drilling, and determining the inter-sector well logging phase characteristics.
In step 3, firstly, Fisher curve conversion is carried out on GR curves of a large number of actual drilling wells of the sector bodies among the sectors, well logging cycle characteristics of the actual drilling wells of the sector bodies among the sectors are determined, then detailed research is carried out on response characteristics of various well logging parameters in the cycle, and a well logging phase mark template of the sector bodies among the sectors is established. FIG. 5 illustrates Fisher curves and convolution characteristics of a solid well with inter-sector fans; FIG. 6 is a gravel rock sector logging phase marker template.
Step 4, establishing a fan-fan sediment model of the gravel rock mass based on the research on the fan-fan sediment mode of the gravel rock mass developed by the water tank experimental result and the real well seismic reflection characteristic;
in step 4, a fan-fan sediment mode model is established based on the sediment mode dissection result of the research area gravel rock movable bottom plate water tank simulation experiment result and the seismic reflection characteristics of the fan-fan solid well. FIG. 7 is a diagram showing the deposition pattern of a gravel rock mass revealed by a simulation experiment of a water tank with a movable bottom plate; FIG. 8 is a cross section of a geologic model of a fan-fan sedimentary pattern of a gravel rock mass. FIG. 9 is a vertical section of a geologic model of a fan sedimentary pattern between sectors of a gravel rock mass.
And 5, carrying out forward seismic record characteristic simulation on the inter-sector seismic model obtained in the step 4, and determining an inter-sector seismic reflection characteristic template.
In step 5, obtaining the speeds of different lithologies according to the inter-sector fan real drilling sound wave curve, converting the inter-sector fan geological model established in the step 4 into a speed model, and then carrying out seismic record forward modeling by using a wave equation algorithm and a vertical incidence method to obtain an inter-sector fan seismic reflection characteristic template. FIG. 10 is a cross section of a gravel rock sector forward modeling seismic reflection feature. FIG. 11 is a vertical section of a gravel rock sector forward modeling seismic reflection feature.
And 6, integrating the lithofacies characteristics, the logging facies characteristics and the seismic reflection characteristics obtained in the steps 2, 3 and 5 to establish an integrated identification characteristic quantity version of the inter-fan.
In step 6, the lithofacies, the logging facies templates and the seismic reflection characteristics of the sector body between the sectors obtained in the steps 2, 3 and 5 are integrated to establish an integrated identification characteristic quantity version of the sector between the gravel rock mass sectors. Fig. 12 is a comprehensive identification characteristic quantity version of a gravel rock mass sector built in a certain work area.
Claims (7)
1. The identification method of the fan between the gravel rock mass fans is characterized by comprising the following steps:
step 1, carrying out ancient landform restoration by using seismic data, and determining the plane position of inter-fan development;
step 2, carrying out petrology characteristic research on logging and logging information of the fan-to-fan actual drilling well, and determining lithofacies characteristics of the fan-to-fan;
step 3, researching the logging response characteristics of the fan-fan actual drilling well among the fans, and determining the logging phase characteristics of the fan among the fans;
step 4, establishing a fan-fan sediment model of the gravel rock mass based on the research on the fan-fan sediment mode of the gravel rock mass developed by the water tank experimental result and the real well seismic reflection characteristic;
step 5, forward seismic record characteristic simulation is carried out on the fan-fan sediment model to obtain the seismic reflection characteristics of the fan-fan of the gravel rock mass;
and 6, comprehensively establishing a seismic and geological identification quantity version of the fan between the gravel rock mass fans.
2. The method for identifying the fan between the gravel rock mass fans as claimed in claim 1, wherein in step 1, firstly, real drilling wells and three-dimensional seismic data are utilized to establish an isochronous stratigraphic framework, then an isochronal sequence thickness comparison method is utilized to recover an ancient geomorphology method to carry out fine recovery of the ancient geomorphology, the development characteristics of the gravel rock mass fan in a research area are comprehensively analyzed, and the development position of the fan between the gravel rock mass fans is determined according to the channel fan corresponding principle.
3. The method for identifying the sectors between the gravel rock sectors as claimed in claim 1, wherein in step 2, a petrological characteristic study is carried out according to the logging and logging data of a large number of actual drilled wells of the sectors between the sectors in step 1, so as to clarify the lithofacies characteristics of the sectors between the sectors.
4. The method for identifying the fan between the gravel rock mass fans as claimed in claim 1, wherein in step 3, Fisher curve transformation is firstly carried out on GR curves of a large number of actual wells of the fan body between the fans, so as to define the well logging gyrating characteristics of the actual wells of the fan body between the fans, and then response characteristics of various well logging parameters in the gyrating are carefully studied, so as to establish a well logging phase mark template of the fan between the fans.
5. The method for identifying the sectors among the gravel rock sectors as claimed in claim 1, wherein in step 4, a sector deposition mode model is established based on the deposition mode dissection result of the research area gravel rock movable bottom plate water tank simulation experiment result and the seismic reflection characteristics of the actual drilling wells of the sectors among the sectors.
6. The method for identifying the sectors between the gravel rock sectors as claimed in claim 1, wherein in the step 5, the velocities of different lithologies are obtained according to the sector real drilling acoustic curve, the sector geological model established in the step 4 is converted into a velocity model, and then the seismic record forward modeling is carried out by using a wave equation algorithm and a vertical incidence method, so as to obtain the sector seismic reflection characteristic template.
7. The identification method of the sectors between the gravel rock mass sectors as claimed in claim 1, wherein in step 6, a comprehensive identification characteristic quantity version of earthquake geology of the sectors between the sectors is finally established by utilizing the lithofacies characteristics, the logging facies characteristics and the earthquake reflection characteristics of the sectors between the sectors obtained in steps 2, 3 and 5.
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| CN114690245A (en) * | 2022-03-29 | 2022-07-01 | 成都理工大学 | Drilling-free drilling earthquake abnormal body geological model forward modeling method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114690245A (en) * | 2022-03-29 | 2022-07-01 | 成都理工大学 | Drilling-free drilling earthquake abnormal body geological model forward modeling method |
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