59 results about "Sedimentology" patented technology

The invention discloses a seismic information based method for determining coalbed methane enrichment sedimentation control effect. The method uses three-dimensional seismic data, applies seismic sedimentology interpretation techniques to coal-bearing stratum, predicts sedimentary microfacies of a target interval, and predicts a trend of gas content change in the target interval in the area by using relative relationship between sedimentary and lithological changes and gas content, thereby revealing the sedimentation control effect of coalbed methane. The method introduces seismic sedimentology into studies of the coal-bearing stratum, realizes fine characterization of sedimentary facies belts distribution and lithologic boundaries, analyzes and studies the coalbed methane enrichment sedimentation control effect, and provides strong technical support for the exploration and development of favorable areas for coalbed methane enrichment.

The invention relates to a seismic sedimentology reservoir prediction system which comprises a data acquisition device (1), a data quality analysis device (2), a seismic geomorphology analysis device (3), a seismic petrology analysis device (4), a reservoir prediction device (5) and a reservoir output device (6), wherein the data acquisition device (1) is connected with the data quality analysis device (2); the data quality analysis device (2) is respectively connected with the seismic geomorphology analysis device (3) and the seismic petrology analysis device (4); the seismic geomorphology analysis device (3) and the seismic petrology analysis device (4) are simultaneously connected with the reservoir prediction device (5); and the reservoir prediction device (5) is connected with the reservoir output device (6). The seismic sedimentology reservoir prediction system effectively solves the problems of diachronous complicated sedimentary stratum and isochronous stratal slicing in manners of driving data and automatically tracking seismic lineups. The seismic sedimentology reservoir prediction system has the beneficial effects that based on seismic geomorphology plane identification, a seismic facies is calibrated through the seismic petrology research; and through chronostratigraphic cyclic domain slicing, the palaeosedimentary environment is recovered, and the reservoir evolution is developed in two domains to describe the distribution of a favorable reservoir. The system has good application effect and promotion prospect.

The invention discloses a seismic sedimentology interpretation method based on frequency-scale matching, and belongs to the field of petroleum exploration and development. The seismic sedimentology interpretation method comprises the following steps: (1) loading post-stack seismic data, (2) carrying out phase switching, obtaining a phase seismic data body with the angle of 90 degrees, (3) confirming the average thickness of a main exploration target sand body according to well-point analysis, (4) confirming the tuning frequency of the target sand body, (5) processing the seismic data in a fractional frequency mode, obtaining a fractional frequency seismic data body reflecting the target sand body, (6) manufacturing strata slices of the fractional frequency data body, (7) interpreting the strata slices, obtaining plane distribution and evolution of the target sand body, (8) when sand bodies with various thickness levels exist, carrying out operations on the sand body at each level according to the step (4) to the step (7), (9) combining the interpretation results of the slices with the same depth of various fractional frequency bodies, and interpreting characteristics and evolution of research area sedimentary microfacies. The seismic sedimentology interpretation method based on the frequency-scale matching is used for interpretation of the thin-layer sedimentary characteristics under a seism vertical resolution ratio, remarkably improves thin-layer sedimentary seismic interpretation accuracy and is wide in application prospect.

The invention discloses a method and a system for identifying fragmental rock lithological characters, which aim to overcome the defect of incapability of accurately and continuously identifying the lithological characters of strata. The method includes the steps: determining lithological character types of rock samples of rock cores or wall cores in terms of size fractions according to experimental analysis data and logging data of the rock cores or the wall cores; performing interaction analysis for the lithological character types of the rock samples of the rock cores or wall cores and regular logging curves, and establishing mathematical statistic relation among electrical property values of the regular logging curves and the lithological character types of different size fractions; establishing lithological profiles of core unsampled sections and whole well intervals according to the regular logging curves based on the mathematical statistic relation among the electrical property values of the regular logging curves and the lithological character types of different size fractions; and correcting thicknesses of different lithological characters and rocks containing gravels in the lithological profiles by means of image logging data, and establishing the continuous stratum lithological character size fraction sequence. The method can accurately reflect change characteristics of stratum deposition, so as to provide reliable basis for meticulously evaluating reservoir physical properties and sedimentology research.

The invention provides a method for exquisitely depicting and predicting edge structures of carbonate platforms. The method comprises the steps of: establishing a high-resolution sequence stratigraphic framework through well-seismic combination; recovering an ancient landform according to a stratum residual thickness map and determining a development position of a platform edge; exquisitely dissecting the platform edge by utilizing seismic data, establishing development modes of different platform edge zones at different periods, and analyzing a development issue and a superposition style of areef flat body; determining plane distribution characteristics of the platform edge and development issue and scale of the reef flat body therein, and delimiting a beneficial reef flat development zone of the platform edge zone; and forwardly modeling the growth of a platform by using geological software, and optimizing a prediction result. The method for exquisitely depicting and predicting edgestructures of carbonate platforms is mainly based on a sedimentology theory and a sequence stratum theory, and is capable of carrying out exquisite dissection on platform edge structures and predicting distribution positions beneficial for reef flat bodies by sufficiently utilizing outcrop, seismic and drilling data, thereby improving the exquisite degree of platform structure depiction.

A method having application for the development of oil reservoirs for automatically extracting from a seismic image pertinent information for sedimentologic interpretation in order to reconstruct the depositional conditions under which sedimentary layers have formed, by means of estimations of realistic chronological scenarios of sedimentary layers deposition. The method comprises iterative estimation of a first and of a second chronological scenario of the deposition of sedimentary layers, assuming that each reflector settles at the earliest, respectively at the latest possible moment during the sedimentary depositional process. A chronological level number is assigned to a group of initial reflectors. Then a chronological level number incremented by one, respectively decremented by one, is assigned to the reflectors made up from pixels located above, respectively below the initial reflectors and above, respectively below no other reflector. An interpretation of these two chronological scenarios is eventually carried out so as to reconstruct the depositional conditions of the sedimentary layers.

A continental lacustrine basin shale sedimentary system division method includes: 1, evaluating sedimentary environment of fine-grained matter to divide sedimentary system or sedimentary facies; 2, analyzing that fine particle sedimentary characteristics; 3, carrying out the spatial distribution characteristics of the fine grain sedimentary type; 4, analyzing the internal relationship between thesedimentary environment and the fine-grained matter to determine the sedimentary mechanism of the fine-grained matter; 5, determining a sedimentary system scheme; 6, establishing an evaluation index of the sedimentary system; 7, defining the spatial distribution of the sedimentary system. The continental lacustrine basin shale sedimentary system division method provides the direction for shale oilexploration, provides related theoretical support for deep research of hydrocarbon generation-reservoir forming-accumulation of for lacustrine facies shale and is of great theoretical significance tothe development of sedimentology and reservoir geology.

The invention provides an identification method of a sedimentary microfacies mode of a carbonate rock high-frequency sequence framework. The method includes the following steps: determining a lithologic sensitive well logging curve by using a layer rock core sample of carbonate rock and a conventional well logging curve; determining a three-porosity well logging curve combination according to a resistivity well logging curve combination; identifying a low-frequency sequence boundary according to the lithologic sensitive well logging curve, the three-porosity well logging curve combination and the resistivity well logging curve combination; identifying a high-frequency sequence boundary according to the low-frequency sequence boundary; analyzing single well sedimentary subfacies and microfacies division; and completing the comparison and division of sedimentary microfacies of a whole well section. The method has strong operationality, conforms to the principles of sequence stratigraphy and sedimentology, can accurately establish the sedimentary microfacies mode with the high-frequency sequence as constraint with dynamic and static combination of division units, carries out sedimentary evolution analysis, and lays a good foundation for the sedimentary understanding of carbonate gas reservoir, the establishment of reservoir geophysical prediction forward model and the comprehensive evaluation of gas reservoirs.

The invention discloses a method and device for removing the sedimentary background under high-dimensional seismic data input. The method comprises carrying out Wheeler conversion on high-dimensionaloriginal seismic data of a reservoir to be measured to obtain high-dimensional Wheeler domain seismic data; carrying out cluster analysis processing on the high-dimensional Wheeler domain seismic datato obtain a cluster result; in the cluster result, respectively calculating the average value of seismic trace data of a single cluster on the same sampling point, taking the average value as the seismic data of the corresponding cluster on the same sampling point, and forming cluster seismic trace data; carrying out linear superposition processing on the cluster seismic trace data to obtain a linear superposition vector, and determining sedimentary background data according to the linear superposition vector; and carrying out Body operation on the high-dimensional Wheeler domain seismic dataand the sedimentary background data to obtain lithology seismic data of the reservoir to be measured. By means of all the embodiments, the sedimentary background can be removed accurately and efficiently, and the accuracy of the fine seismic sedimentology research is improved.

The invention provides a conversion method and apparatus of lithologic data volumes, and relates to the technical field of earthquake sedimentology. The method comprises the following steps: obtaining first post-stack seismic data volumes, and performing phase estimation and correction on the first post-stack seismic data volumes to generate first zero-phase post-stack seismic data volumes; performing resampling on the first zero-phase post-stack seismic data volumes at a first preset sampling rate to form second zero-phase post-stack seismic data volumes; performing reflection coefficient inversion on the second zero-phase post-stack seismic data volumes to form broadband seismic data volumes; performing phase estimation and correction on the broadband seismic data volumes to generate third zero-phase post-stack seismic data volumes; and through a colored inversion method, performing lithologic data volume conversion on the third zero-phase post-stack seismic data volumes to generate the lithologic data volumes. According to the invention, the problem of difficulty in converting the seismic data volumes into the lithologic data volumes due to incapability of realization of a lithology distinguishing function simply by use of a 90-degree phase conversion technology in the prior art can be solved.

The present invention provides a foreland basin alluvial fan fine description and prediction method. The method comprises a step of establishing a foreland basin alluvial fan geological model, a step of establishing the stratigraphic framework of an alluvial fan, a step of carrying out seismic facies and attribute inversion to delineate the plane distribution range of an alluvial fan, a step of carrying out three-dimensional electrical inversion to divide the phase band boundary of the alluvial fan of each period, carry out the fine identification of internal lithology and lithofacies, and determine the spatial distribution characteristics of the lithology and lithofacies, and a step of applying OpenDtect software to analyze the alluvial fan vertical evolution and establishing the deposition model of a study area alluvial fan. The method provided by the invention is mainly based on the sedimentology theory and the geological model foundation established by alluvial fan exposure investigation, logging, seismic, electrical method and other materials are fully utilized, the means of logging geological interpretation, seismic sequence analysis, seismic facies interpretation, attribute analysis and electrical method interpretation are integrated, and each phase band of the alluvial fan and the internal lithology and lithofacies spatial distribution characteristic are effectively identified.

The invention discloses a protective layer selecting method of coal and gas outburst, and aims at solving the problems that protective layer selection of coal and gas outburst mainly relies on experience and lacks theoretical basis. According to the invention, theories including sedimentology and sequence stratigraphy are adopted, and coal measure strata rock stratum property, rock stratum thickness, rock stratum spacing, coal seam thickness and sequence system domain of coal seams are analyzed; under the same geological tectonic conditions, the nearer the coal seams to transgression systems domain largest sea (lake) flooding surface positions, gas storage amount is larger (except limestone top floor coal seams), highlighted tendentiousness of coal seams and gas is larger, so according to the character, coal seam gas occurrence and highlighted tendentiousness of and coal and gas are performed, and theoretical selection of coal and gas outburst protective layer can be performed. The protective layer selecting method of coal and gas outburst perfects selection basis of coal and gas outburst protective layers, solves the problem of blindness of selection of infrastructure mine coals and gas outburst protective layer, and reduces readjustment of coal mining deployment.

The invention discloses a method for sedimentary system interpretation based on a fractional-frequency seismic reflection energy stratigraphic slice. A time-frequency analysis is introduced into the seismic sedimentology study and a frequency band with weak seismic reflection wave interference effect can be selected. Meanwhile, superiority of using seismic reflection energy for replacing the amplitude for sedimentary system interpretation is demonstrated. Therefore, the precision of interpreting the sedimentary system by using seismic information can be improved; and the multiplicity of interpretation can be reduced. The method has the broad application range and high practicability.

The invention discloses a method for quantitatively analyzing an ultra-deep gypsum salt rock and dolomite coupling mechanism. The method comprises the following steps of: (1) respectively acquiring geological background data, classic field geological outcrop profile measurement data, drilling and logging data and seismic data by taking a Sichuan basin carbonate rock reservoir as an object; (2) according to the data obtained in the step (1), determining the basic geological characteristics of dolomite by using sedimentology, petroleum geology theories and various geochemical test analysis, anddetermining the types of dolomite and petrology and distribution rules of various dolomites; and (3) according to the petrology and distribution rule of various dolomites, analyzing the form and formation mechanism of various dolomites and the quantitative relationship between the dolomites and gypsum salt rock, and finally determining the coupling relationship. By judging the source, the seepagedirection, the path and the like of dolomitic fluid, the coupling relation between the dolomitic fluid source and quantification of the bed series and gypsum salt rock is defined, and the method has important guiding significance for oil and gas exploration.

The invention discloses a method for predicting distribution and ratio of sedimentary particles. The method comprises the following steps: analyzing the density of a rock sample according to research area sampling or core data, and analyzing granularity of the rock sample to obtain data, including density and particle size distribution, of sedimentary components; from the view of sedimentary dynamic characteristics of sedimentary sand bodies, carrying out sedimentology investigation, and determining structural geologic characteristics, including physiognomy, and sedimentary dynamic control factors of the sedimentary sand bodies in a research area; according to different carrying ways of the particles, dividing the sedimentary components into two types, and calculating volume of sediments according to simulation representations of the sedimentary components; repeating the steps until simulation is finished, so that quantitative representation on the research area is realized; extracting data of each component from a result map simulated by a computer, calculating thickness and percentage content of each component according to density data, drawing a thickness distribution diagram and a content distribution diagram of all the components, and thus finally realizing prediction of the distribution and ratio of the sedimentary particles. The method disclosed by the invention has the advantage of being better in line with the practical geological process.

The invention discloses a stratum slice priority selection method and belongs to the seismic sedimentology field. The method comprises the following steps of according to an equal proportion subdivision method, acquiring a plurality of stratum slices; acquiring a specific value of a thickness from a top of a target layer to a bottom of a layer to be researched of all wells and a total thickness ofthe target layer, and according to the specific value and a subdivision number in the equal proportion subdivision method, acquiring a range where the stratum slices corresponding to the layer to beresearched are located; acquiring amplitude data of all the wells of the stratum slices, acquiring a reservoir parameter of the layer to be researched, and calculating a correlation coefficient between the amplitude data of the stratum slices and the reservoir parameter; and acquiring the preferred stratum slice of the layer to be researched. In the invention, correlation degree calculating and analysis are performed on the amplitude information of the stratum slices and real reservoir information of the layer to be researched so as to rapidly and accurately select the stratum slices with a highest anastomosis degree.

The invention provides a method and device for predicating the characteristics of a shale gas reservoir. The method comprises the steps that according to the TOC and a whole rock-mineral of the shale gas reservoir, the lithofacies type of the shale gas reservoir is determined, and further the organic geochemical characteristic and the sediment characteristic of the shale gas reservoir are predicted according to the lithofacies type. Due to the fact that the lithofacies type of the shale gas reservoir is determined according to the TOC and the whole rock-mineral of the shale gas reservoir, the determined lithofacies type can accurately reflect the important organic geochemical characteristic and the sediment characteristic in the characteristics of the shale gas reservoir, and the technical problem that in the prior art, the accuracy of prediction of the characteristics of the shale gas reservoir is not high is solved.

The invention discloses a three-dimensional complex geologic model label manufacturing method suitable for a machine learning algorithm, is applied to the seismic data processing field, and aims at solving the problem that a three-dimensional geological model constructed in the prior art does not completely conform to stratum deposition and geomechanics rules. The method is based on the theories of stratigraphic sedimentology, tectonic geology, geotectonic mechanics and the like; a stratum deposition rule and a stratum stress condition generated by a fault are considered; factors such as connection among karst caves, holes, fractures and faults are avoided; a three-dimensional complex geologic model label manufacturing method suitable for a machine learning algorithm is provided, construction of a large number of three-dimensional geologic models conforming to actual geological conditions is achieved, a seismic wave field response simulation technology is combined, and conditions are provided for extracting complex geologic structure oil and gas reservoir related parameters from seismic data through the machine learning algorithm.

The invention discloses a density-based seismic facies extraction method of noise-containing application spatial clustering. The method comprises the following steps of: S1, processing actual seismicdata, eliminating noise in the seismic signals, and improving a signal-to-noise ratio; S2, based on the seismic sedimentology principle, forming stratum slices by uniform segmentation along the top and bottom boundaries of a target layer; S3, extracting seismic waveform information capable of expressing reservoir characteristic change of a real target layer based on the stratum slices; S4, standardizing and normalizing the acquired seismic waveform data to eliminate the influence caused by mutation of different attribute characteristic parameters; and S5, completing the spatial clustering analysis of the seismic waveform data of the target layer through adoption of a density-based noise-containing application spatial clustering method, and forming a corresponding seismic phase diagram. Theprecision of extracting seismic waveforms along the conventional layer according to time windows is improved, the requirement of waveform information changing along with reservoir characteristics ismet, and a material foundation is laid for the seismic waveform clustering analysis.

The invention discloses a seismic sedimentology quantitative characterization method of braided river delta reservoirs in horizontal well area, and relates to the field of oil and gas development geology. The seismic sedimentology quantitative characterization method comprises the following steps that (1) the post-stack seismic data volume is loaded; (2) the seismic data quality is analyzed; (3) 90-degree phase shifting is conducted; (4) the average sand thickness is counted; (5) the seismic data main frequency f matched with the average sand thickness h is determined; (6) seismic data volumeCf with the main frequency being f is made by frequency-division analysis of the 90 degree phase seismic data volume; (7) frequency-division seismic slices are made by using the frequency-division seismic data volume Cf; (8) petrophysical analysis is conducted; (9) well logging curves of the horizontal well section are projected to the frequency-division seismic slices; (10) the seismic slices arecalibrated by using horizontal well information for fine geological interpretation; and (11) a quantitative sedimentary knowledge base of sand bodies with different sedimentary microfacies types is established. According to the seismic sedimentology quantitative characterization method, operation is easy, an efficient industrialized method is provided for seismic sedimentology characterization ofsand bodies in the horizontal well area, and the prediction accuracy of the sand bodies can be improved.

The invention discloses a sandy deposited particle distinguishing method, and belongs to the technical field of sedimentology. The method comprises the following steps: collecting and processing a sample, analyzing surface roundness, disc shaped impact crater, crescent-shaped impact crater, shell like fracture, V shaped impact crater, and impact ditch of quartz particle through scanning electron microscope (SEM) images; utilizing a linear measurement method to count the surface characteristics of quartz particles, utilizing the ratio of quartz particles having impact ditches and disc shaped impact craters to all particles that linear lines go through in the linear measurement method to draw a distinguishing layout; and utilizing the ratio of quartz particles having crescent-shaped impact craters and V shaped impact craters to all particles that linear lines go through in the linear measurement method to draw a distinguishing layout. Compared with the technology of particle size analysis, the provided method has the advantages that the application range is wider, and there is no situation of multiple solutions or less situations of multiple solutions. Compared with the technology of bedding analysis, the provided method has the advantages that the particles can be researched in a microscopic level, the theoretical foundation is strong, and the judgment results are accurate.

The invention provides a prediction method and device of thin reservoir stratums. The method comprises steps of according to -90 degree phase position seismic data, time-depth relation curves of a target well and reservoir stratum characteristic curves, determining positions of the thin reservoir stratums; through wavelet time frequency spectrum, the time-depth relation curves of the target well and the positions of the reservoir stratums, determining a target interference frequency; according to the determined target interference frequency, generating target frequency division data through methods of wavelet transform and the like; and through the target frequency division data and a reference layer, generating frequency lowering stratum section data. The frequency lowering stratum section data clearly describes the distribution range of the thin reservoir stratums, so a problem of inaccurate prediction results of section ranges caused by interference of the thin reservoir stratums issolved and prediction precision of the thin reservoir stratums is improved. According to the invention, a research idea which is completely different from the traditional vertical resolution thin stratum is provided; and a novel thin reservoir stratum prediction technology is provided, which is a major breakthrough in the aspects of thin reservoir stratum prediction of seismic sedimentology. By use of each embodiment of the invention, accuracy and precision of prediction of reservoir stratums are improved.

The invention provides a method for evaluating seismic amplitude preservation performance by utilizing phased tendency energy matching. The research shows that a soft constraint relation usually exists between seismic (response) attributes and reservoir parameters, namely, a correlativity within a certain range rather than a determined mathematical relation exists between the seismic (response) attributes and reservoir parameters. According to the principle, the phased tendency energy matching seismic amplitude preservation evaluation method utilizes a reservoir oriented forward modeling result to provide spatially continuous soft constraint information for (waveform) amplitude preservation imaging modeling, and reduce uncertainty of a model, so as to increase seismic imaging precision. The phased tendency energy matching seismic amplitude preservation evaluation method is used for evaluating amplitude preservation performance of seismic data from the aspects of sedimentology and seismic interpretation for the first time.

The invention discloses a multi-mineral component calculation method based on a single acoustic wave old well logging series, belongs to the field of geophysical exploration, and solves the problem that an old well of an electrical combination series in the prior art only has four curves of AC, GR and RT/RXO and cannot meet the solving of complex mineral components. The calculation method is suitable for well logging in which carbonaceous substances and grey substances do not coexist in the same lithology, and comprises the following steps: S1, core homing; s2, calculating the shale content Vsh; s3, establishing an effective porosity model; s4, calculating the effective porosity phi; s5, marking a carbonaceous layer FLAG_COAL; s6, marking a grey matter layer FLAG_CA; and S7, calculating the content of grey matter, carbonaceous matter and sandstone according to the rock volume physical model. According to the sedimentary principle that carbonaceous and grey matter do not coexist in the same lithology, the components of the multi-mineral tight sandstone are calculated by using a distributed solution method, the problem of multi-mineral solution of a single acoustic logging series is solved, and a good application effect is obtained in the Hua River group in Jinhua-autumn block.

The invention provides a set of technical method for systematically and comprehensively identifying a basin edge deposition fan body in a deep water area of a South China Sea oil-gas-containing basin.The invention relates to a method for quantitatively identifying a sedimentary fan body at the basin edge of a sedimentary basin by comprehensively analyzing six kinds of data such as same sedimentary faults, landforms, object sources, seismic facies, seismic attributes and a sedimentary center. The method is particularly suitable for deep water areas of oil-gas-bearing basins in the South ChinaSea. According to the method, on the basis of inheriting a former person recognition method, a tectonic sedimentology theory and a seismic sedimentology theory are combined, multi-method, multi-angleand five-in-one cooperation is adopted to recognize and judge the development of the basin edge sedimentary fan body, finally quantitative research is achieved, and the accuracy and credibility of a recognition result are greatly improved; meanwhile, different identifications in each identification method are assigned, the final total score is calculated, whether the fan body develops or not is quantitatively described, and the method is convenient and operable.