CN117008185A - Stratigraphic unconformity trap identification method and device, storage medium and electronic equipment - Google Patents
Stratigraphic unconformity trap identification method and device, storage medium and electronic equipment Download PDFInfo
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Abstract
The invention provides a method and a device for identifying a non-integrated trap of a stratum, a storage medium and electronic equipment, and relates to the technical field of oil and gas exploration, wherein the method comprises the following steps: performing unconformity surface identification on the block to be explored based on the pre-processed seismic data; performing seismic forward modeling on the identified non-integrated surface to obtain a stratum super-stripping boundary identification parameter; finely etching a stratum super-peeling boundary based on the stratum super-peeling boundary identification parameters; predicting the characteristics of the reservoir and the effective reservoir to obtain a reservoir map; and drawing a trap boundary based on the reservoir map and the stratum super-stripping boundary and obtaining a trap basic parameter so as to identify the unconformity trap of the stratum. The technical scheme provided by the invention can be used for identifying the non-integrated trap of the stratum in a standardized, unified, accurate and effective manner, so that the evaluation and management level of the non-integrated trap of the stratum is improved.
Description
Technical Field
The invention relates to the technical field of oil and gas exploration, in particular to a method and a device for identifying a non-integrated trap of a stratum, a storage medium and electronic equipment.
Background
The trap is a final place for oil gas gathering, is the most specific and practical exploration object in various levels of exploration evaluation objects, and is also a main exploration object in a pre-exploration stage and important evaluation content in an exploration stage. The trap evaluation reflects the exploration degree and the exploration potential of one exploration area, and also reflects the knowledge degree of exploration workers on the geological conditions of the exploration target oil and gas reservoir, and directly relates to the risk degree of exploration deployment. The trap evaluation has important significance for guiding annual planning deployment, and is a key link for improving the exploration success rate.
In recent years, the oil and gas exploration difficulty is increased due to the influence of factors such as complexity of underground geological conditions, enhanced concealment of exploration targets and the like. Along with the transformation of the oil and gas exploration thought, the exploration target type is transferred from the construction trap to the stratum, lithology and composite trap by depending on advanced and applicable exploration new technology and new method. With the continued advancement of hydrocarbon exploration technology, the role of formation unconformity type traps in future reserves increases will become more pronounced.
According to investigation and inquiry results, a stratum unconformity trap identification description and evaluation method is not established internationally. The related content in China only has the technology and the management standard adopted by the petroleum and natural gas industry, however, the standard lacks the refinement and deepening of the description and the evaluation of the non-integrated trap identification of the stratum, and is not systematic and meticulous in the description and the evaluation of the non-integrated trap identification of the stratum, such as lacking the quantitative evaluation standard of the description of the non-integrated trap boundary of the stratum, and the like, so that the fine trap characterization and the reliability cannot meet the requirements. The problems of non-uniform description and evaluation technologies of different basins, irregular results and the like of unconformity trap of the stratum exist, so that the trap is difficult to recognize and low in implementation degree, and the effective implementation of exploration deployment is directly restricted.
Disclosure of Invention
Aiming at the problems in the prior art, the application provides a method, a device, a storage medium and electronic equipment for identifying the formation unconformity trap, which can identify the formation unconformity trap in a standardized, unified, accurate and effective manner, so that the evaluation and management level of the formation unconformity trap is improved.
In order to achieve the above purpose, the technical scheme of the application is realized as follows:
in a first aspect, an embodiment of the present application provides a method for identifying a formation unconformity trap, where the method includes:
performing unconformity surface identification on the block to be explored based on the pre-processed seismic data;
performing seismic forward modeling on the identified non-integrated surface to obtain a stratum super-stripping boundary identification parameter;
finely etching a stratum super-peeling boundary based on the stratum super-peeling boundary identification parameters;
predicting the characteristics of the reservoir and the effective reservoir to obtain a reservoir map;
and drawing a trap boundary based on the reservoir map and the stratum super-stripping boundary and obtaining a trap basic parameter so as to identify the unconformity trap of the stratum.
Further, before the non-integral face identification of the block to be surveyed based on the pre-processed seismic data, the method further comprises:
And determining the development geological conditions of the formation unconformity trap in the block to be explored.
Preferably, the pre-processed seismic data comprises: formation contact relationship, paleobioinformation, volcanic activity information, and log; the non-integrated surface identification of the block to be explored based on the pre-processed seismic data comprises the following steps:
based on the stratum contact relation, the paleobioinformation and the volcanic activity information, performing non-integral surface geological recognition on the block to be explored by adopting an isotope annual survey technology;
performing unconformity logging identification on the block to be explored based on the logging curve;
and on the basis of geological identification of the unconformity surface and logging identification of the unconformity surface, adopting a high-order time-frequency analysis technology to restrict inter-well tracking so as to realize seismic identification of the unconformity surface.
Preferably, the identified non-integrated facets include non-integrated facets of different order levels and non-integrated facets of different types; performing seismic forward modeling on the identified non-integrated surface to obtain a stratum super-stripping boundary identification parameter, wherein the method comprises the following steps of:
performing seismic forward modeling on each combined mode of different lithology, speed and stratum inclination of different sequence levels and different types of non-integrated surfaces to obtain seismic response characteristics;
And obtaining the stratum super-stripping boundary identification parameters based on the seismic response characteristics.
Preferably, the finely etching the formation super-peeling boundary based on the formation super-peeling boundary identification parameter includes:
based on the stratum super-peeling boundary identification parameters, adopting an earthquake attribute instantaneous phase technology, an included angle earthquake extrapolation technology, an ant body processing technology, a horizontal slicing technology and a geostatistical method to finely etch the stratum super-peeling boundary.
Preferably, the predicting the reservoir characteristics and the effective reservoir to obtain a reservoir map includes:
obtaining the reservoir characteristics through core and logging analysis; wherein the reservoir characteristics include: lithology characteristics, lithology characteristics and physical characteristics;
predicting the effective reservoir by adopting a seismic inversion and convergence stratum seismic attribute technology;
the reservoir map is obtained based on the reservoir characteristics and the effective reservoir.
Further, prior to said delineating a trap boundary based on said reservoir map and said formation super-stripping boundary and obtaining a trap base parameter to identify a formation non-integrated trap, said method further comprises:
analyzing the plugging conditions of the top plate and the bottom plate; the method comprises the steps of,
obtaining a matching relationship among a construction line, a stratum super-stripping line and a lithologic pinch-out line;
The delineating a trap boundary based on the reservoir map and the formation super-stripping boundary and obtaining a trap basic parameter to identify a formation non-integrated trap, comprising:
overlapping the reservoir map with the stratum super-stripping boundary based on the top-bottom plate plugging condition and the matching relation, and etching the trap boundary;
and obtaining the trapping basic parameters based on the trapping boundary so as to identify that the stratum is not integrated with the trapping.
Further, the method further comprises:
the ability of the formation to close in unconformity of traps was evaluated.
Preferably, the evaluating the capping capability of the formation unconformity trap includes:
based on real drilling data, adopting a geophysical prediction technology to definitely trap the lithology distribution of the top and bottom plates;
and evaluating the quality of the cover layer by adopting a geophysical prospecting means based on the quantitative relation between the cover layer breakthrough pressure and the acoustic logging.
In a second aspect, an embodiment of the present invention provides a device for identifying a non-integrated trap of a stratum, where the device includes:
the unconformity surface identification unit is used for carrying out unconformity surface identification on the block to be explored based on the pre-processed seismic data;
the earthquake forward modeling unit is used for performing earthquake forward modeling on the identified non-integrated surface to obtain stratum super-stripping boundary identification parameters;
The stratum super-peeling boundary depiction unit is used for finely marking out a stratum super-peeling boundary based on the stratum super-peeling boundary identification parameters;
the prediction unit is used for predicting the reservoir characteristics and the effective reservoir to obtain a reservoir map;
and the trap boundary depiction unit is used for plotting a trap boundary based on the reservoir map and the stratum super-stripping boundary and obtaining trap basic parameters so as to identify the unconformity of the stratum.
In a third aspect, an embodiment of the present invention provides a storage medium having program code stored thereon, where the program code, when executed by a processor, implements a method for identifying a stratigraphic unconformity trap according to any one of the above embodiments.
In a fourth aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes a memory and a processor, where the memory stores program code that can be executed on the processor, and the program code is executed by the processor to implement a method for identifying a stratigraphic non-integrated trap according to any one of the foregoing embodiments.
According to the stratum non-integrated trap identification method, device, storage medium and electronic equipment, the non-integrated surface identification is carried out on the area to be explored based on the pre-processed seismic data, the seismic forward modeling is carried out on the identified non-integrated surface, stratum super-stripping boundary identification parameters are obtained, stratum super-stripping boundaries are finely drawn based on the stratum super-stripping boundary identification parameters, reservoir characteristics and effective reservoirs are predicted, a reservoir map is obtained, trap boundaries are drawn based on the reservoir map and the stratum super-stripping boundaries, and trap basic parameters are obtained, so that stratum non-integrated trap is identified, and therefore the identification of stratum non-integrated trap can be carried out in a standard, unified, accurate and effective mode, namely, the technical scheme provided by the embodiment of the invention can identify stratum non-integrated trap in a standard, unified, accurate and effective mode, and therefore the evaluation and management level of stratum non-integrated trap is improved.
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The scope of the present disclosure will be better understood from the following detailed description of exemplary embodiments, read in conjunction with the accompanying drawings. The drawings included herein are:
FIG. 1 is a flow chart of a method according to an embodiment of the present invention;
FIG. 2 is a flow chart of a second method according to an embodiment of the invention;
FIG. 3 is a schematic diagram illustrating formation super-stripping boundary description of a high-order unconformity surface according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating formation super-stripping boundary description of a low-order unconformity surface according to an embodiment of the present invention;
fig. 5 is a block diagram of an apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the implementation method of the present invention will be given with reference to the accompanying drawings and examples, by which the technical means are applied to solve the technical problems, and the implementation process for achieving the technical effects can be fully understood and implemented accordingly.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
Example 1
In recent years, with the deep work and the improvement of the exploration degree of the oil and gas exploration of the main basin in China, special types of trap such as stratum unconformity and the like are continuously discovered and broken through, and the method has become an important field for increasing the storage and the production and resource succession. In order to further meet the requirements of modernization and benefit of the evaluation work of the formation unconformity trap, the recognition description and evaluation of the formation unconformity trap are further deepened from the geological background, the research result and the management experience of the formation unconformity trap, and a formation unconformity trap recognition description and evaluation technical method is established.
From the statistical analysis of main factors of the current well-logging well failure, inaccurate well-logging identification is a main cause of well-logging failure, and accounts for 34%. In order to improve the quality and efficiency of formation unconformity trap exploration deployment and promote standardization and standardization of trap evaluation work, formation of formation unconformity trap identification description and evaluation technology series is needed.
In order to further promote the scientific, orderly and efficient unfolding of the formation unconformity hydrocarbon reservoir exploration, the description points of formation unconformity trap identification are standardized based on the particularity of formation unconformity trap formation geological background on the basis of summarizing the discovered formation unconformity trap exploration result and the formation accumulation rule, a formation unconformity trap identification description and evaluation technical method is established, the effective improvement of the formation unconformity trap identification description precision is promoted, and the formation unconformity trap evaluation and management level, the formation unconformity trap drilling rate and the drilling success rate are further improved.
Based on the foregoing thought, the embodiment of the present invention provides a method for identifying a trap of a formation unconformity, as shown in fig. 1, where the method in this embodiment includes steps S101, S102, S103, S104 and S105, and the following details of these steps are described in detail below:
step S101, carrying out unconformity surface identification on a block to be explored based on pre-processed seismic data;
in this embodiment, the pre-processed seismic data includes: formation contact relationship, paleobioinformation, volcanic activity information, and log; the non-integrated surface identification of the block to be explored based on the pre-processed seismic data comprises the following steps:
based on the stratum contact relation, the paleobioinformation and the volcanic activity information, performing non-integral surface geological recognition on the block to be explored by adopting an isotope annual survey technology; performing unconformity logging identification on the block to be explored based on the logging curve; and on the basis of geological identification of the unconformity surface and logging identification of the unconformity surface, adopting a high-order time-frequency analysis technology to restrict inter-well tracking so as to realize seismic identification of the unconformity surface.
In this embodiment, the pre-processed seismic data is obtained by: the quality analysis is carried out on the original seismic data of the block to be explored, and the seismic data with poor quality is subjected to targeted processing so as to improve the seismic recognizability of the stratum denudation line and the overburden line, namely, the seismic data can meet the recognition requirements of the stratum denudation line and the stratum overburden line. Only when the original seismic data is processed, the seismic precision can be improved, and the stratum denudation line and the stratum overburden line can be better identified.
The quality of the seismic data is judged by adopting the resolution of the seismic data and the imaging precision of the seismic data. For seismic data with poor quality, for example, a first-order non-integrated strong reflection lower reflection weak reflection area adopts seismic automatic gain processing; 2. the three-stage low-angle non-integration adopts frequency expansion treatment, and adopts ant body technology to identify and construct broken belt degraded pinch-out lines and low-order breaks.
In this embodiment, before the non-integrated surface identification is performed on the area to be explored based on the pre-processed seismic data, the method further includes:
and determining the development geological conditions of the formation unconformity trap in the block to be explored.
Specifically, research such as structural evolution history, stratum grillwork, stratum distribution, stratum lithology combination patterns and the like is carried out on the to-be-explored area, and macroscopic distribution characteristics such as the development position, the development layer and the like of the non-integrated trap are definitely carried out, so that the development geological condition of the non-integrated trap of the stratum in the to-be-explored area is determined.
Step S102, performing seismic forward modeling on the identified non-integrated surface to obtain stratum super-stripping boundary identification parameters;
in this embodiment, the identified non-integrated planes include non-integrated planes of different orders and non-integrated planes of different types; performing seismic forward modeling on the identified non-integrated surface to obtain a stratum super-stripping boundary identification parameter, wherein the method comprises the following steps of:
Performing seismic forward modeling on each combined mode of different lithology, speed and stratum inclination of different sequence levels and different types of non-integrated surfaces to obtain seismic response characteristics; and obtaining the stratum super-stripping boundary identification parameters based on the seismic response characteristics.
Wherein, the stratum super-stripping boundary identification parameters comprise: a formation erosion line identification parameter and a formation overburden line identification parameter.
In this embodiment, the level I high angle unconformity surface shows continuous strong reflection, and has obvious cutting characteristics with the underlying degraded stratum, and the smaller the extrapolated distance between the identified stripping point and the actual position is, the identifiable is the conventional profile. II. The III-level low-angle non-integrated surface has poor continuity of the same phase axis, weak reflection, unobvious cutting characteristics and difficult identification of the ablation point and the accurate position thereof.
The stratum included angle and the stratum speed and the main frequency of the earthquake waves are main factors influencing the identification of the earthquake super-stripping points; the average instantaneous phase is a dominant attribute of formation trap identification.
Step S103, finely engraving a stratum super-peeling boundary based on the stratum super-peeling boundary identification parameters;
in this embodiment, the finely etching the formation super-peeling boundary based on the formation super-peeling boundary identification parameter includes: based on the stratum super-peeling boundary identification parameters, adopting an earthquake attribute instantaneous phase technology, an included angle earthquake extrapolation technology, an ant body processing technology, a horizontal slicing technology and a geostatistical method to finely etch the stratum super-peeling boundary.
Fig. 3 is a schematic diagram illustrating formation super-stripping boundary description of a high-order non-integrated surface in an embodiment of the present invention, and fig. 4 is a schematic diagram illustrating formation super-stripping boundary description of a low-order non-integrated surface in an embodiment of the present invention. It can be seen from the figure that the description of the stratum super-peeling boundary can be roughly divided into three specific steps of defining super-peeling patterns, identifying super-peeling points and describing super-peeling wires.
Step S104, predicting the reservoir characteristics and the effective reservoir to obtain a reservoir map;
in this embodiment, the predicting the reservoir characteristics and the effective reservoir to obtain the reservoir map includes: obtaining the reservoir characteristics through core and logging analysis; wherein the reservoir characteristics include: lithology characteristics, lithology characteristics and physical characteristics; predicting the effective reservoir by adopting a seismic inversion and convergence stratum seismic attribute technology; the reservoir map is obtained based on the reservoir characteristics and the effective reservoir.
And step S105, delineating a trap boundary based on the reservoir map and the stratum super-stripping boundary and obtaining a trap basic parameter so as to identify that the stratum is not integrated with the trap.
In this embodiment, before the delineating a trap boundary based on the reservoir map and the formation super-stripping boundary and obtaining a trap base parameter to identify a formation non-integrated trap, the method further includes: analyzing the plugging conditions of the top plate and the bottom plate; and obtaining the matching relation among the construction line, the stratum super-stripping line and the lithologic pinch-out line.
Then, the delineating a trap boundary based on the reservoir map and the formation super-stripping boundary and obtaining a trap basic parameter to identify a formation non-integrated trap, comprising: overlapping the reservoir map with the stratum super-stripping boundary based on the top-bottom plate plugging condition and the matching relation, and etching the trap boundary; and obtaining the trapping basic parameters based on the trapping boundary so as to identify that the stratum is not integrated with the trapping.
In this embodiment, the basic parameters of the trap include parameters such as area, thickness, and high-point burial depth of the trap.
Further, the method of this embodiment further includes: the ability of the formation to close in unconformity of traps was evaluated.
In this embodiment, the evaluating the capping capability of the formation unconformity trap includes: based on real drilling data, adopting a geophysical prediction technology to definitely trap the lithology distribution of the top and bottom plates; and evaluating the quality of the cover layer by adopting a geophysical prospecting means based on the quantitative relation between the cover layer breakthrough pressure and the acoustic logging.
According to the stratum non-integration trap identification method provided by the embodiment of the invention, the non-integration surface identification is carried out on the block to be explored based on the pre-processed seismic data, the seismic forward modeling is carried out on the identified non-integration surface, the stratum super-peeling boundary identification parameters are obtained, the stratum super-peeling boundary is finely carved based on the stratum super-peeling boundary identification parameters, the reservoir characteristics and the effective reservoirs are predicted, the reservoir diagram is obtained, the trap boundary is carved based on the reservoir diagram and the stratum super-peeling boundary, and the trap basic parameters are obtained, so that the stratum non-integration trap is identified, and the identification of the stratum non-integration trap can be carried out in a standard, unified, accurate and effective manner.
Example two
In this embodiment, an actual formation unconformity trap identification process is taken as an example, and a formation unconformity trap identification method is further described in detail. As shown in fig. 2, the method according to the present embodiment includes step S201, step S202, step S203, step S204, step S205, step S206, step S207, and step S208, and the following details of these steps are described below:
step S201, determining a development geological condition of a stratum unconformity trap in a block to be explored;
specifically, research such as structural evolution history, stratum grillwork, stratum distribution, stratum lithology combination patterns and the like is carried out on the to-be-explored area, and macroscopic distribution characteristics such as the development position, the development layer and the like of the non-integrated trap are definitely carried out, so that the development geological condition of the non-integrated trap of the stratum in the to-be-explored area is determined.
Step S202, processing the original seismic data of the block to be explored;
in this embodiment, processing the original seismic data of the block to be surveyed includes: the quality analysis is carried out on the original seismic data of the block to be explored, and the seismic data with poor quality is subjected to targeted processing so as to improve the seismic recognizability of the stratum denudation line and the overburden line, namely, the seismic data can meet the recognition requirements of the stratum denudation line and the stratum overburden line. Only when the original seismic data is processed, the seismic precision can be improved, and the stratum denudation line and the stratum overburden line can be better identified.
The quality of the seismic data is judged by adopting the resolution of the seismic data and the imaging precision of the seismic data. For seismic data with poor quality, for example, a first-order non-integrated strong reflection lower reflection weak reflection area adopts seismic automatic gain processing; 2. the three-stage low-angle non-integration adopts frequency expansion treatment, and adopts ant body technology to identify and construct broken belt degraded pinch-out lines and low-order breaks.
Step S203, performing unconformity surface identification on the block to be explored based on the processed seismic data;
in this embodiment, the processed seismic data includes: stratum contact relation, paleobioinformation, volcanic activity information and logging curve, then carry out the unconformity face and discern to the exploration area based on the seismic data after handling, include:
based on the stratum contact relation, the paleobioinformation and the volcanic activity information, performing non-integral surface geological recognition on the block to be explored by adopting an isotope annual survey technology; performing unconformity logging identification on the block to be explored based on the logging curve; and on the basis of geological identification of the unconformity surface and logging identification of the unconformity surface, adopting a high-order time-frequency analysis technology to restrict inter-well tracking so as to realize seismic identification of the unconformity surface.
Step S204, performing seismic forward modeling on the identified non-integrated surface to obtain stratum super-stripping boundary identification parameters;
in this embodiment, the identified non-integrated planes include non-integrated planes of different orders and non-integrated planes of different types; performing seismic forward modeling on the identified non-integrated surface to obtain a stratum super-stripping boundary identification parameter, wherein the method comprises the following steps of:
performing seismic forward modeling on each combined mode of different lithology, speed and stratum inclination of different sequence levels and different types of non-integrated surfaces to obtain seismic response characteristics; and obtaining the stratum super-stripping boundary identification parameters based on the seismic response characteristics.
Wherein, the stratum super-stripping boundary identification parameters comprise: a formation erosion line identification parameter and a formation overburden line identification parameter.
In this embodiment, the level I high angle unconformity surface shows continuous strong reflection, and has obvious cutting characteristics with the underlying degraded stratum, and the smaller the extrapolated distance between the identified stripping point and the actual position is, the identifiable is the conventional profile. II. The III-level low-angle non-integrated surface has poor continuity of the same phase axis, weak reflection, unobvious cutting characteristics and difficult identification of the ablation point and the accurate position thereof.
The stratum included angle and the stratum speed and the main frequency of the earthquake waves are main factors influencing the identification of the earthquake super-stripping points; the average instantaneous phase is a dominant attribute of formation trap identification.
Step S205, finely engraving a stratum super-peeling boundary based on the stratum super-peeling boundary identification parameters;
in this embodiment, the finely etching the formation super-peeling boundary based on the formation super-peeling boundary identification parameter includes: based on the stratum super-peeling boundary identification parameters, adopting an earthquake attribute instantaneous phase technology, an included angle earthquake extrapolation technology, an ant body processing technology, a horizontal slicing technology and a geostatistical method to finely etch the stratum super-peeling boundary.
Fig. 3 is a schematic diagram illustrating formation super-stripping boundary description of a high-order non-integrated surface in an embodiment of the present invention, and fig. 4 is a schematic diagram illustrating formation super-stripping boundary description of a low-order non-integrated surface in an embodiment of the present invention. It can be seen from the figure that the description of the stratum super-peeling boundary can be roughly divided into three specific steps of defining super-peeling patterns, identifying super-peeling points and describing super-peeling wires.
Step S206, evaluating the capping capability of the formation unconformity trap;
in this embodiment, evaluating the capping capability of the formation unconformity trap includes: based on real drilling data, adopting a geophysical prediction technology to definitely trap the lithology distribution of the top and bottom plates; and evaluating the quality of the cover layer by adopting a geophysical prospecting means based on the quantitative relation between the cover layer breakthrough pressure and the acoustic logging.
Step S207, predicting the reservoir characteristics and the effective reservoir to obtain a reservoir map;
in this embodiment, the predicting the reservoir characteristics and the effective reservoir to obtain the reservoir map includes: obtaining the reservoir characteristics through core and logging analysis; wherein the reservoir characteristics include: lithology characteristics, lithology characteristics and physical characteristics; predicting the effective reservoir by adopting a seismic inversion and convergence stratum seismic attribute technology; the reservoir map is obtained based on the reservoir characteristics and the effective reservoir.
And step S208, delineating a trap boundary based on the reservoir map and the stratum super-stripping boundary and obtaining a trap basic parameter so as to identify that the stratum is not integrated with the trap.
In this embodiment, first, the plugging conditions of the top and bottom plates need to be analyzed, and the matching relationship among the construction line, the formation super-stripping line and the lithology pinch-out line needs to be obtained, then, based on the plugging conditions of the top and bottom plates and the matching relationship, the reservoir map and the formation super-stripping boundary are overlapped, the trap boundary is drawn, and the trap basic parameters are obtained based on the trap boundary, so as to identify the formation non-integrated trap.
After the formation unconformity trap is identified through the method, in practical application, the formation unconformity trap can be further evaluated for oil and gas.
In this example, the focus of formation unconformity trap hydrocarbon-bearing evaluation is to enhance hydrocarbon source and drainage condition evaluation. The hydrocarbon source and the dredging conditions are mainly used for researching a circle-source space relation, a time matching relation between a hydrocarbon source rock main hydrocarbon discharge period and trap formation, a composite dredging system (such as faults, unconformity surfaces and sand bodies), an dominant migration path and an effective migration distance. For the formation overburden unconformity, the preservation condition research of the development and distribution of the covering layer of the trap development area should be enhanced.
Based on the system summary of the formation unconformity trap formation combination type, the oil gas enrichment rule and the formation main control factor, through intensive attack research, the embodiment provides that the formation unconformity trap identification key point is unconformity face identification and formation super-stripping fine characterization. The key technology of this embodiment is: the unconformity surface adopts a logging comprehensive curve and a high-order time-frequency analysis technology; the stratum super-stripping adopts the seismic structure attribute, ant colony tracking technology and the like, and forms an eight-step flow of stratum non-integration trap identification description.
The eight steps of the process are summarized as follows: firstly, carrying out researches on structural evolution history, stratum grids, stratum distribution, stratum lithology combination patterns and the like, and definitely determining macro distribution characteristics of non-integrated development positions, stratum systems and the like; secondly, analyzing the quality of the seismic data, and performing targeted processing on the seismic data with poor quality to improve the seismic identifiable degree of the stratum denudation line and the overburden line; thirdly, identifying the non-integrated surface; fourth, forward modeling of different lithology, speed and stratum dip angle combination modes on different sequence levels and different types of non-integrated surfaces is carried out, seismic response characteristics are analyzed, and sensitive parameters of stratum erosion and overburden line identification are defined; fifthly, describing stratum super-stripping lines by utilizing an earthquake attribute instantaneous phase technology, an included angle earthquake extrapolation technology, an ant body processing technology, a horizontal slicing technology, a geostatistical method and the like; step six, the lithology distribution of the top and bottom plates is clearly trapped by combining real drilling data with geophysical prediction; evaluating the quality of the cover layer by using a geophysical prospecting means based on the quantitative relation between the cover layer breakthrough pressure and the acoustic logging; seventh, reservoir characteristics and effective reservoir prediction; and eighth, analyzing the plugging conditions of the top plate and the bottom plate, and the matching relation of construction lines, stratum super stripping lines and lithology pinch lines, and finely describing the trap boundary and realizing the basic parameters of the trap through overlapping result figures such as a storage body and a construction.
The method described in this embodiment is actually applied to description and evaluation of non-integrated trap recognition of the depressed-energy stratum. By drilling, the fact that the formation unconformity trap is consistent with the knowledge before drilling is confirmed, the trap implementation is reliable, and the effectiveness of the formation unconformity trap identification description of an eight-step process is further verified. The method not only promotes standardization and standardization of the Bohai Bay basin stratum unconformity trap identification description work and improves the stratum unconformity trap drilling rate and success rate, but also has important guiding significance for the domestic unconformity oil and gas exploration of other basin strata.
According to the stratum non-integration trap identification method provided by the embodiment of the invention, the non-integration surface identification is carried out on the block to be explored based on the pre-processed seismic data, the seismic forward modeling is carried out on the identified non-integration surface, the stratum super-peeling boundary identification parameters are obtained, the stratum super-peeling boundary is finely carved based on the stratum super-peeling boundary identification parameters, the reservoir characteristics and the effective reservoirs are predicted, the reservoir diagram is obtained, the trap boundary is carved based on the reservoir diagram and the stratum super-peeling boundary, and the trap basic parameters are obtained, so that the stratum non-integration trap is identified, and the identification of the stratum non-integration trap can be carried out in a standard, unified, accurate and effective manner.
Example III
Corresponding to the embodiment of the method, the invention further provides a device for identifying the unconformity of the stratum trap, as shown in fig. 5, wherein the device comprises:
an unconformity face recognition unit 301, configured to perform unconformity face recognition on a block to be explored based on the pre-processed seismic data;
the earthquake forward modeling unit 302 is configured to perform earthquake forward modeling on the identified non-integrated surface, so as to obtain a formation super-stripping boundary identification parameter;
a layer super-peeling boundary depiction unit 303, configured to finely scribe a layer super-peeling boundary based on the layer super-peeling boundary identification parameter;
the prediction unit 304 is used for predicting the reservoir characteristics and the effective reservoir to obtain a reservoir map;
and a trap boundary depiction unit 305, configured to score a trap boundary based on the reservoir map and the formation super-stripping boundary and obtain a trap basic parameter, so as to identify that the formation does not integrate with the trap.
Further, the apparatus described in this embodiment further includes:
and the determining unit is used for determining the development geological conditions of the formation unconformity trap in the block to be explored.
In this embodiment, the pre-processed seismic data includes: formation contact relationship, paleobioinformation, volcanic activity information, and log; the unconformity surface recognition unit 301 performs unconformity surface recognition on the area to be surveyed by adopting the following manner:
Based on the stratum contact relation, the paleobioinformation and the volcanic activity information, performing non-integral surface geological recognition on the block to be explored by adopting an isotope annual survey technology;
performing unconformity logging identification on the block to be explored based on the logging curve;
and on the basis of geological identification of the unconformity surface and logging identification of the unconformity surface, adopting a high-order time-frequency analysis technology to restrict inter-well tracking so as to realize seismic identification of the unconformity surface.
In this embodiment, the identified non-integrated planes include non-integrated planes of different orders and non-integrated planes of different types; the seismic forward modeling unit 302 performs seismic forward modeling on the identified non-integrated surface in the following manner to obtain a formation super-stripping boundary identification parameter:
performing seismic forward modeling on each combined mode of different lithology, speed and stratum inclination of different sequence levels and different types of non-integrated surfaces to obtain seismic response characteristics;
and obtaining the stratum super-stripping boundary identification parameters based on the seismic response characteristics.
In this embodiment, the formation super-peeling boundary delineating unit 303 finely delineating the formation super-peeling boundary in the following manner:
Based on the stratum super-peeling boundary identification parameters, adopting an earthquake attribute instantaneous phase technology, an included angle earthquake extrapolation technology, an ant body processing technology, a horizontal slicing technology and a geostatistical method to finely etch the stratum super-peeling boundary.
In this embodiment, the prediction unit 304 predicts the reservoir characteristics and the effective reservoir in the following manner to obtain a reservoir map:
obtaining the reservoir characteristics through core and logging analysis; wherein the reservoir characteristics include: lithology characteristics, lithology characteristics and physical characteristics;
predicting the effective reservoir by adopting a seismic inversion and convergence stratum seismic attribute technology;
the reservoir map is obtained based on the reservoir characteristics and the effective reservoir.
Further, the apparatus described in this embodiment further includes:
the analysis unit is used for analyzing the plugging conditions of the top and bottom plates before the reservoir map and the stratum super-stripping boundary are used for describing a trapping boundary and obtaining basic trapping parameters so as to identify that the stratum is not integrated with the trapping;
and the matching relation acquisition unit is used for acquiring the matching relation among the construction line, the stratum super-stripping line and the lithology pinch-out line before the closure boundary is drawn based on the reservoir map and the stratum super-stripping boundary and the basic parameter of the closure is obtained so as to identify the unconformity of the closure of the stratum.
The trap boundary delineating unit 305 delineates the trap boundary and obtains the trap basic parameters to identify that the formation does not integrate with the trap:
overlapping the reservoir map with the stratum super-stripping boundary based on the top-bottom plate plugging condition and the matching relation, and etching the trap boundary;
and obtaining the trapping basic parameters based on the trapping boundary so as to identify that the stratum is not integrated with the trapping.
Further, the apparatus described in this embodiment further includes:
and the capping capability evaluation unit is used for evaluating the capping capability of the formation unconformity trap.
In this embodiment, the capping capability evaluation unit evaluates the capping capability of the formation unconformity trap in the following manner:
based on real drilling data, adopting a geophysical prediction technology to definitely trap the lithology distribution of the top and bottom plates;
and evaluating the quality of the cover layer by adopting a geophysical prospecting means based on the quantitative relation between the cover layer breakthrough pressure and the acoustic logging.
The working principle, the working procedure and the like of the device relate to specific embodiments, and refer to specific embodiments of the method for identifying the non-integrated trap of the stratum provided by the invention, so that the same technical content is not described in detail herein.
According to the stratum non-integrated trap identification device provided by the embodiment of the invention, the non-integrated surface identification is carried out on the block to be explored based on the pre-processed seismic data, the seismic forward modeling is carried out on the identified non-integrated surface, the stratum super-peeling boundary identification parameters are obtained, the stratum super-peeling boundary is finely carved based on the stratum super-peeling boundary identification parameters, the reservoir characteristics and the effective reservoirs are predicted, the reservoir diagram is obtained, the trap boundary is carved based on the reservoir diagram and the stratum super-peeling boundary, and the trap basic parameters are obtained, so that the stratum non-integrated trap is identified, and the identification of the stratum non-integrated trap can be carried out in a standard, unified, accurate and effective manner.
Example IV
According to an embodiment of the present invention, there is also provided a storage medium having stored thereon program code which, when executed by a processor, implements a method for identifying a stratigraphic non-integrated trap as in any of the above embodiments.
The method comprises the following steps:
performing unconformity surface identification on the block to be explored based on the pre-processed seismic data;
performing seismic forward modeling on the identified non-integrated surface to obtain a stratum super-stripping boundary identification parameter;
finely etching a stratum super-peeling boundary based on the stratum super-peeling boundary identification parameters;
predicting the characteristics of the reservoir and the effective reservoir to obtain a reservoir map;
and drawing a trap boundary based on the reservoir map and the stratum super-stripping boundary and obtaining a trap basic parameter so as to identify the unconformity trap of the stratum.
Further, before the non-integral face identification of the block to be surveyed based on the pre-processed seismic data, the method further comprises:
and determining the development geological conditions of the formation unconformity trap in the block to be explored.
Preferably, the pre-processed seismic data comprises: formation contact relationship, paleobioinformation, volcanic activity information, and log; the non-integrated surface identification of the block to be explored based on the pre-processed seismic data comprises the following steps:
based on the stratum contact relation, the paleobioinformation and the volcanic activity information, performing non-integral surface geological recognition on the block to be explored by adopting an isotope annual survey technology;
Performing unconformity logging identification on the block to be explored based on the logging curve;
and on the basis of geological identification of the unconformity surface and logging identification of the unconformity surface, adopting a high-order time-frequency analysis technology to restrict inter-well tracking so as to realize seismic identification of the unconformity surface.
Preferably, the identified non-integrated facets include non-integrated facets of different order levels and non-integrated facets of different types; performing seismic forward modeling on the identified non-integrated surface to obtain a stratum super-stripping boundary identification parameter, wherein the method comprises the following steps of:
performing seismic forward modeling on each combined mode of different lithology, speed and stratum inclination of different sequence levels and different types of non-integrated surfaces to obtain seismic response characteristics;
and obtaining the stratum super-stripping boundary identification parameters based on the seismic response characteristics.
Preferably, the finely etching the formation super-peeling boundary based on the formation super-peeling boundary identification parameter includes:
based on the stratum super-peeling boundary identification parameters, adopting an earthquake attribute instantaneous phase technology, an included angle earthquake extrapolation technology, an ant body processing technology, a horizontal slicing technology and a geostatistical method to finely etch the stratum super-peeling boundary.
Preferably, the predicting the reservoir characteristics and the effective reservoir to obtain a reservoir map includes:
obtaining the reservoir characteristics through core and logging analysis; wherein the reservoir characteristics include: lithology characteristics, lithology characteristics and physical characteristics;
predicting the effective reservoir by adopting a seismic inversion and convergence stratum seismic attribute technology;
the reservoir map is obtained based on the reservoir characteristics and the effective reservoir.
Further, prior to said delineating a trap boundary based on said reservoir map and said formation super-stripping boundary and obtaining a trap base parameter to identify a formation non-integrated trap, said method further comprises:
analyzing the plugging conditions of the top plate and the bottom plate; the method comprises the steps of,
obtaining a matching relationship among a construction line, a stratum super-stripping line and a lithologic pinch-out line;
the delineating a trap boundary based on the reservoir map and the formation super-stripping boundary and obtaining a trap basic parameter to identify a formation non-integrated trap, comprising:
overlapping the reservoir map with the stratum super-stripping boundary based on the top-bottom plate plugging condition and the matching relation, and etching the trap boundary;
and obtaining the trapping basic parameters based on the trapping boundary so as to identify that the stratum is not integrated with the trapping.
Further, the method further comprises:
the ability of the formation to close in unconformity of traps was evaluated.
Preferably, the evaluating the capping capability of the formation unconformity trap includes:
based on real drilling data, adopting a geophysical prediction technology to definitely trap the lithology distribution of the top and bottom plates;
and evaluating the quality of the cover layer by adopting a geophysical prospecting means based on the quantitative relation between the cover layer breakthrough pressure and the acoustic logging.
Example five
According to an embodiment of the present invention, there is further provided an electronic device, including a memory and a processor, where the memory stores program code executable on the processor, and when the program code is executed by the processor, the method for identifying a stratigraphic non-integrated trap according to any of the foregoing embodiments is implemented.
The method comprises the following steps:
performing unconformity surface identification on the block to be explored based on the pre-processed seismic data;
performing seismic forward modeling on the identified non-integrated surface to obtain a stratum super-stripping boundary identification parameter;
finely etching a stratum super-peeling boundary based on the stratum super-peeling boundary identification parameters;
predicting the characteristics of the reservoir and the effective reservoir to obtain a reservoir map;
And drawing a trap boundary based on the reservoir map and the stratum super-stripping boundary and obtaining a trap basic parameter so as to identify the unconformity trap of the stratum.
Further, before the non-integral face identification of the block to be surveyed based on the pre-processed seismic data, the method further comprises:
and determining the development geological conditions of the formation unconformity trap in the block to be explored.
Preferably, the pre-processed seismic data comprises: formation contact relationship, paleobioinformation, volcanic activity information, and log; the non-integrated surface identification of the block to be explored based on the pre-processed seismic data comprises the following steps:
based on the stratum contact relation, the paleobioinformation and the volcanic activity information, performing non-integral surface geological recognition on the block to be explored by adopting an isotope annual survey technology;
performing unconformity logging identification on the block to be explored based on the logging curve;
and on the basis of geological identification of the unconformity surface and logging identification of the unconformity surface, adopting a high-order time-frequency analysis technology to restrict inter-well tracking so as to realize seismic identification of the unconformity surface.
Preferably, the identified non-integrated facets include non-integrated facets of different order levels and non-integrated facets of different types; performing seismic forward modeling on the identified non-integrated surface to obtain a stratum super-stripping boundary identification parameter, wherein the method comprises the following steps of:
Performing seismic forward modeling on each combined mode of different lithology, speed and stratum inclination of different sequence levels and different types of non-integrated surfaces to obtain seismic response characteristics;
and obtaining the stratum super-stripping boundary identification parameters based on the seismic response characteristics.
Preferably, the finely etching the formation super-peeling boundary based on the formation super-peeling boundary identification parameter includes:
based on the stratum super-peeling boundary identification parameters, adopting an earthquake attribute instantaneous phase technology, an included angle earthquake extrapolation technology, an ant body processing technology, a horizontal slicing technology and a geostatistical method to finely etch the stratum super-peeling boundary.
Preferably, the predicting the reservoir characteristics and the effective reservoir to obtain a reservoir map includes:
obtaining the reservoir characteristics through core and logging analysis; wherein the reservoir characteristics include: lithology characteristics, lithology characteristics and physical characteristics;
predicting the effective reservoir by adopting a seismic inversion and convergence stratum seismic attribute technology;
the reservoir map is obtained based on the reservoir characteristics and the effective reservoir.
Further, prior to said delineating a trap boundary based on said reservoir map and said formation super-stripping boundary and obtaining a trap base parameter to identify a formation non-integrated trap, said method further comprises:
Analyzing the plugging conditions of the top plate and the bottom plate; the method comprises the steps of,
obtaining a matching relationship among a construction line, a stratum super-stripping line and a lithologic pinch-out line;
the delineating a trap boundary based on the reservoir map and the formation super-stripping boundary and obtaining a trap basic parameter to identify a formation non-integrated trap, comprising:
overlapping the reservoir map with the stratum super-stripping boundary based on the top-bottom plate plugging condition and the matching relation, and etching the trap boundary;
and obtaining the trapping basic parameters based on the trapping boundary so as to identify that the stratum is not integrated with the trapping.
Further, the method further comprises:
the ability of the formation to close in unconformity of traps was evaluated.
Preferably, the evaluating the capping capability of the formation unconformity trap includes:
based on real drilling data, adopting a geophysical prediction technology to definitely trap the lithology distribution of the top and bottom plates;
and evaluating the quality of the cover layer by adopting a geophysical prospecting means based on the quantitative relation between the cover layer breakthrough pressure and the acoustic logging.
According to the stratum non-integrated trap identification method, device, storage medium and electronic equipment, the non-integrated surface identification is carried out on the area to be explored based on the pre-processed seismic data, the seismic forward modeling is carried out on the identified non-integrated surface, stratum super-stripping boundary identification parameters are obtained, stratum super-stripping boundaries are finely drawn based on the stratum super-stripping boundary identification parameters, reservoir characteristics and effective reservoirs are predicted, a reservoir map is obtained, trap boundaries are drawn based on the reservoir map and the stratum super-stripping boundaries, and trap basic parameters are obtained, so that stratum non-integrated trap is identified, and therefore the identification of stratum non-integrated trap can be carried out in a standard, unified, accurate and effective mode, namely, the technical scheme provided by the embodiment of the invention can identify stratum non-integrated trap in a standard, unified, accurate and effective mode, and therefore the evaluation and management level of stratum non-integrated trap is improved.
The application also has the following advantages:
(1) The method standardizes the key points and the operation flow of the formation unconformity trap identification description, improves the formation unconformity trap description precision, the formation unconformity trap evaluation and management level and the formation unconformity trap drilling success rate, and lays a foundation for the efficient exploration of formation unconformity type traps.
(2) The application has good theoretical basis, and good operability and practicality.
(3) The method has wide adaptability and can be applied to description and evaluation of unconformity trap identification of different basin strata.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present application.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention is essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing an electronic device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Although the embodiments of the present invention are disclosed above, the embodiments are only used for the convenience of understanding the present invention, and are not intended to limit the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the present disclosure as defined by the appended claims.
Claims (12)
1. A method for identifying unconformity of a formation trap, the method comprising:
performing unconformity surface identification on the block to be explored based on the pre-processed seismic data;
performing seismic forward modeling on the identified non-integrated surface to obtain a stratum super-stripping boundary identification parameter;
finely etching a stratum super-peeling boundary based on the stratum super-peeling boundary identification parameters;
predicting the characteristics of the reservoir and the effective reservoir to obtain a reservoir map;
and drawing a trap boundary based on the reservoir map and the stratum super-stripping boundary and obtaining a trap basic parameter so as to identify the unconformity trap of the stratum.
2. The method of claim 1, further comprising, prior to the unconformity surface identification of the area to be surveyed based on the pre-processed seismic data:
And determining the development geological conditions of the formation unconformity trap in the block to be explored.
3. The method of formation unconformity trap identification of claim 1, wherein the pre-processed seismic data comprises: formation contact relationship, paleobioinformation, volcanic activity information, and log; the non-integrated surface identification of the block to be explored based on the pre-processed seismic data comprises the following steps:
based on the stratum contact relation, the paleobioinformation and the volcanic activity information, performing non-integral surface geological recognition on the block to be explored by adopting an isotope annual survey technology;
performing unconformity logging identification on the block to be explored based on the logging curve;
and on the basis of geological identification of the unconformity surface and logging identification of the unconformity surface, adopting a high-order time-frequency analysis technology to restrict inter-well tracking so as to realize seismic identification of the unconformity surface.
4. The method of formation unconformity trap identification of claim 1, wherein the identified unconformity faces include unconformity faces of different order levels and unconformity faces of different types; performing seismic forward modeling on the identified non-integrated surface to obtain a stratum super-stripping boundary identification parameter, wherein the method comprises the following steps of:
Performing seismic forward modeling on each combined mode of different lithology, speed and stratum inclination of different sequence levels and different types of non-integrated surfaces to obtain seismic response characteristics;
and obtaining the stratum super-stripping boundary identification parameters based on the seismic response characteristics.
5. The method for identifying a non-integrated trap in a formation according to claim 1, wherein the fine-etching a formation super-peeling boundary based on the formation super-peeling boundary identification parameter comprises:
based on the stratum super-peeling boundary identification parameters, adopting an earthquake attribute instantaneous phase technology, an included angle earthquake extrapolation technology, an ant body processing technology, a horizontal slicing technology and a geostatistical method to finely etch the stratum super-peeling boundary.
6. The method for identifying unconformity of a formation trap according to claim 1, wherein predicting the reservoir characteristics and the effective reservoir to obtain a reservoir map comprises:
obtaining the reservoir characteristics through core and logging analysis; wherein the reservoir characteristics include: lithology characteristics, lithology characteristics and physical characteristics;
predicting the effective reservoir by adopting a seismic inversion and convergence stratum seismic attribute technology;
the reservoir map is obtained based on the reservoir characteristics and the effective reservoir.
7. The method of formation unconformity trap identification of claim 1, wherein prior to said delineating a trap boundary based on the reservoir map and the formation overstrip boundary and obtaining a trap base parameter to identify a formation unconformity trap, the method further comprises:
analyzing the plugging conditions of the top plate and the bottom plate; the method comprises the steps of,
obtaining a matching relationship among a construction line, a stratum super-stripping line and a lithologic pinch-out line;
the delineating a trap boundary based on the reservoir map and the formation super-stripping boundary and obtaining a trap basic parameter to identify a formation non-integrated trap, comprising:
overlapping the reservoir map with the stratum super-stripping boundary based on the top-bottom plate plugging condition and the matching relation, and etching the trap boundary;
and obtaining the trapping basic parameters based on the trapping boundary so as to identify that the stratum is not integrated with the trapping.
8. The formation unconformity trap identification method of claim 1, further comprising:
the ability of the formation to close in unconformity of traps was evaluated.
9. The method of formation unconformity trap identification of claim 8, wherein the evaluating the cap ability of the formation unconformity trap comprises:
Based on real drilling data, adopting a geophysical prediction technology to definitely trap the lithology distribution of the top and bottom plates;
and evaluating the quality of the cover layer by adopting a geophysical prospecting means based on the quantitative relation between the cover layer breakthrough pressure and the acoustic logging.
10. A stratigraphic unconformity trap identification device, the device comprising:
the unconformity surface identification unit is used for carrying out unconformity surface identification on the block to be explored based on the pre-processed seismic data;
the earthquake forward modeling unit is used for performing earthquake forward modeling on the identified non-integrated surface to obtain stratum super-stripping boundary identification parameters;
the stratum super-peeling boundary depiction unit is used for finely marking out a stratum super-peeling boundary based on the stratum super-peeling boundary identification parameters;
the prediction unit is used for predicting the reservoir characteristics and the effective reservoir to obtain a reservoir map;
and the trap boundary depiction unit is used for plotting a trap boundary based on the reservoir map and the stratum super-stripping boundary and obtaining trap basic parameters so as to identify the unconformity of the stratum.
11. A storage medium having program code stored thereon, which when executed by a processor, implements a method of stratigraphic non-integrated trap identification as claimed in any one of claims 1 to 9.
12. An electronic device comprising a memory, a processor, the memory having stored thereon program code executable on the processor, the program code, when executed by the processor, implementing the stratigraphic non-integrated trap identification method of any of claims 1-9.
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