130 results about "Lithic fragment" patented technology

The invention provides an old well reexamination method and system based on a multi-modal digital rock debris virtual well, and the method comprises the steps: obtaining mineralogical data of an old well rock debris sample, optimizing an original well logging curve of an old well through the combination of Bayesian correction, predicting an undrilled layer of the old well through the constraint of a long-short-term memory network neural model and seismic data, and obtaining an optimal well logging curve; and the potential level of the undrilled layer of the old well is quantitatively evaluated through the potential matrix, so that the problems of deep rock debris data, low review efficiency and difficulty in potential layer identification in traditional old well review are solved.

The invention discloses a while-drilling barrel rock debris and gas logging sample collecting device. The while-drilling barrel rock debris and gas logging sample collecting device comprises a liquid-sand separation system, a rock debris collecting system and a gas logging sample collecting system. The liquid-sand separation system is used for separating while-drilling well drilling fluid into drilling fluid liquid and rock debris and respectively conveying the drilling fluid liquid and the rock debris to the gas logging sample collection system and the rock debris collection system, and rock debris samples are collected through the rock debris collection system; the gas logging sample collection system comprises a quantitative metering mechanism and a degassing mechanism, and the quantitative metering mechanism quantitatively conveys the drilling fluid to the degassing mechanism; the degassing mechanism comprises a heating mechanism and a vacuum stirring degassing mechanism, and the drilling fluid is degassed through the heating mechanism and the vacuum stirring degassing mechanism to obtain the gas logging sample; the problems that an electric degasser cannot conduct quantitative degassing, oil gas in the C6-C8 range in mud cannot be removed, and the timeliness of manual rock debris collection is poor are effectively solved.

The invention relates to a coal mine underground drilling stratum intelligent discrimination method comprising the following steps: obtaining a drilling speed parameter curve, a drilling pressure parameter curve and a torque parameter curve, and obtaining a drilling speed parameter characteristic set, a drilling pressure parameter characteristic set and a torque parameter set; performing formation characteristic matching on the drilling speed parameter characteristic set, the drilling pressure parameter characteristic set and the torque parameter set to obtain a formation characteristic set; rock debris samples in a preset collection interval in the drilling process are collected according to a preset collection frequency, and a rock debris sample sequence is formed; obtaining stratum lithology characteristics according to the rock debris sample sequence; and taking the formation characteristic set and the formation lithologic characteristics as formation intelligent judgment results. According to the intelligent stratum discrimination method for underground coal mine drilling, accurate acquisition of the stratum characteristic set and the stratum lithologic characteristics is realized, so that the technical effects of providing an accurate intelligent stratum discrimination result for underground coal mine drilling and improving the drilling efficiency and safety are achieved.

The invention relates to the technical field of exploration and development of water flooded layers, in particular to a sandy conglomerate water flooded layer porosity determination method based on an XRD (X-Ray Diffraction) logging technology, which comprises the following steps of: performing correlation analysis on the content of each mineral in mineral content data and the actually measured porosity of the same group; screening out mineral types of which the determination coefficient with the actually measured porosity is greater than a determination coefficient set value; performing multiple linear regression fitting on the content of each mineral type obtained by screening and the corresponding actually measured porosity of the same group to obtain an optimal multiple linear regression model; and for the rock debris sample of the non-coring section of the reservoir stratum of the glutenite water flooded layer, obtaining the porosity calculated value of the rock debris sample through the optimal multiple linear regression model. The porosity data of the rock debris sample of the non-coring section of the reservoir stratum of the glutenite water-flooded layer can be obtained, and the porosity data of the oil reservoir water-flooded layer of the whole well can be obtained by combining the porosity data of the coring section of the rock debris sample, so that the porosity data of the whole oil reservoir water-flooded layer can be obtained.

The utility model belongs to the technical field of geological exploration, and particularly relates to a rock debris sampler for geological exploration, which comprises a sampler, guide strips are welded on the outer walls of two sides of the sampler, and a sleeve column is movably sleeved at the bottom of the sampler; four mounting parts are welded on the outer wall of the sleeve column at equal intervals, a bracket is fixedly mounted in an opening of each mounting part, an included angle between each bracket and each mounting part is 45 degrees, and the internal diameter of the sleeve column is larger than that of the sampler. Then the guide strips on the two sides of the sampler are in butt joint with the corresponding group of inner strips, the sampler is started, the spiral blades on the sampler can work on the rock, the sampler is pressed downwards, the sampler can move downwards along the tracks of the two groups of inner strips and the inner strips, and the inner strips and the inner strips are separated from each other. Meanwhile, under the cooperation of the sleeve column and the bracket, the stability of the sampler during movement can be effectively guaranteed, so that the whole rock debris collection work is more convenient and faster.

The invention relates to the technical field of oil and gas drilling and production, and discloses a method for determining the sphericity of rock debris, computing equipment and a machine readable storage medium. The method for determining the sphericity of the rock debris comprises the following steps: acquiring an original image of a rock debris sample, and preprocessing the original image to obtain a target image; according to the target image, edge detection is carried out, rock debris adhesion particles are separated, the rock debris contour is determined, geometric parameter calculation is carried out according to the rock debris contour, target geometric parameters of the rock debris sample are determined, and the target geometric parameters comprise the actual area, the perimeter, the minimum circumcircle area, the equivalent ellipse long axis length and the equivalent ellipse short axis length; and determining the rock debris sphericity of the rock debris sample according to the target geometric parameter and the lithology type of the rock debris sample. Finally, high-precision, high-efficiency and low-cost rock debris sphericity measurement is realized.

A continuous logging method and device is provide, where the method includes obtaining drilling fragment samples and full-diameter core samples, and screening out target rock cuttings from the drilling fragment samples; performing a micro-indentation experiment on the target rock cuttings to obtain a static parameter thereof; performing a triaxial compression experiment on the full-diameter core samples to obtain a dynamic parameter and a static parameter thereof; determining a first correspondence between the static parameter of the target rock cuttings and the dynamic parameter of the full-diameter core samples; determining a second correspondence between logging data and the static parameter of the target rock cuttings based on the first correspondence; and drawing a formation mechanical property profile based on the second correspondence. The method solves the problem of conventional methods which cannot draw a continuous and complete profile of the mechanical property of the whole well section.

The invention provides a shale oil stratigraphic development degree identification chart construction method and identification method, and the method comprises the steps: carrying out the element analysis of a shale core or rock debris sample, and obtaining the geochemical parameters of a stratum; rock core observation is carried out on the shale rock core or rock debris sample, and the bedding development degree of the stratum is obtained; on the basis of the geochemical parameters and the bedding development degree, geochemical parameters which are highly related to the bedding development degree are obtained; and obtaining a bedding development degree identification chart based on the geochemical parameters having strong correlation with the bedding development degree. According to the method, the correlation between the stratigraphic element geochemical parameters and the bedding development degree is analyzed, the element geochemical parameter combination strongly related to the bedding development degree is selected, and then the bedding development degree recognition intersection chart is established and used for recognizing the bedding development degree. The method for identifying the bedding development degree while drilling is provided for the shale oil horizontal well.

The invention belongs to the technical field of seismic exploration, and discloses a multi-source data fusion-based real-time logging-while-drilling rock debris lithology identification method, which comprises the following steps of: 1, scanning known rock debris to obtain typical multi-source data, performing nonlinear dimensionality reduction fusion to obtain typical low-dimensional feature data, and establishing a typical rock debris sample feature database; 2, the while-drilling logging rock debris is scanned to obtain real-time multi-source data; a third step of performing nonlinear dimension reduction fusion on the real-time multi-source data to obtain real-time low-dimensional feature data; 4, classifying the real-time low-dimensional feature data in combination with a typical rock debris sample database, and establishing an accurate lithologic columnar section; 5, predicting an initial lithologic profile; sixthly, the initial lithologic section is calibrated in real time through the accurate lithologic columnar section, and a final lithologic section is obtained. According to the method, the real-time multi-source data is obtained in real time, the identification result is more accurate, the multiplicity of solutions is reduced, and the lithologic section predicted before drilling is more accurate.

This invention provides a PDC single-tooth rock-breaking experimental device and a method for analyzing the rock-breaking mechanism. The experimental device includes a rock-breaking device body, a PDC tooth cutting depth adjustment mechanism, a cutting speed adjustment mechanism, and a cutting force measurement mechanism. The cutting speed adjustment mechanism can adjust the cutting speed of the rock sample; the rock-breaking device body is used to fix and install the cutting depth adjustment mechanism; the cutting depth adjustment mechanism can clamp the PDC tooth and precisely control its inclination angle and cutting depth; the cutting force measurement mechanism can monitor the cutting force on the rock sample. The method includes the following steps: setting parameters such as cutting depth, cutting speed, and inclination angle; monitoring the cutting force and recording the dynamic rock crushing process; sieving and collecting rock fragments, determining the mass fraction of different groups of rock fragments, and preliminarily determining the ductile-brittle crushing mode of the rock based on the distribution pattern of the rock fragments. This invention has the advantages of precisely controlling the cutting depth, PDC tooth inclination angle, and cutting speed.

The utility model provides a rock debris sampler for geological prospecting, and relates to the field of geological prospecting, the rock debris sampler comprises a sampler body, the sampler body is movably sleeved with a connecting sleeve, the connecting sleeve is fixedly sleeved with a fixing ring, and the surface of the fixing ring is fixedly connected with eight fixing plates; a supporting shaft is rotationally connected between every two adjacent fixing plates, the supporting shafts are fixedly sleeved with supporting legs, and torsional springs are fixedly connected between the supporting legs and the fixing plates. Through cooperation of the supporting legs, the fixed rings, the sliding rings, the first connecting pieces, the second connecting pieces, the transverse plates and other structures, a plurality of triangular stabilizing units are formed together, loads such as vibration and impact generated when the sampler works are converted into tension and compression stress in the transverse plates from concentrated stress at the joints of the supporting legs, and the stability of the sampler is improved. Therefore, the stress concentration phenomenon of connecting points of the supporting legs is effectively avoided, and the risk of fatigue fracture of welding points is effectively reduced.

The application discloses a kind of paragenetic metamorphic rock weathering crust weathering alteration index calculation method, comprising: the mass percentage of element of mud logging cuttings is determined;The mass percentage of element is normalized;The mass percentage of element after normalization is converted into oxide molar ratio;According to the change trend of element oxide molar ratio, the relative loss and relative enrichment trend of various elements in paragenetic metamorphic rock weathering crust is judged;According to the trend of element relative loss or enrichment, the easily soluble element and the element easy to remain are determined, and the new paragenetic metamorphic rock weathering crust weathering alteration index calculation formula is fitted;The molar ratio of element oxide is brought into the new calculation formula established, according to the size of the weathering alteration index value calculated, paragenetic metamorphic rock weathering crust is identified, and paragenetic metamorphic rock weathering crust structure is divided.The application provides important technical support for oil and gas basin paragenetic metamorphic rock weathering crust reservoir research.

The invention relates to the technical field of unconventional resource development, in particular to a method and a device for determining lithology space-time distribution characteristics of coal measure gas, and the corresponding method comprises the following steps: building a sequence stratigraphic framework of a target work area according to rock debris logging data and logging data of the target work area; determining dominant storage lithology corresponding to each coal series gas; according to the sequence stratigraphic framework and the advantage storage lithology corresponding to each type of coal measure gas, establishing a well connection section and a lithology plane graph; and according to the well connection profile and the lithologic plan, determining the lithologic spatial-temporal distribution characteristics of the coal-series gas. The effective determination method of the lithology space-time distribution rule is formed on the basis of combination of the sequence strata, the rock core and the logging, rock core constraint, logging lithology correction and high-precision sequence strata isochronous framework constraint, and then the lithology space-time distribution rule of coal bed gas, coal series shale gas and coal series tight sandstone gas evaluation is determined.

The present application relates to a kind of lithology identification technical field, it is a kind of lithology identification method, device and electronic equipment based on cutting fluorescence image and Raman spectrum fusion, including corresponding cutting sample is non-petroleum hydrocarbon fluorescence cutting fluorescence image, application Gaussian weighting method dynamic segmentation fluorescence area, obtain high, medium, low fluorescence intensity area image and no fluorescence area image, and determine the gray value range of each area image and fluorescence area proportion, and bring into mineral type discrimination rule and match, obtain corresponding mineral species and mineral content;Again with lithology identification rule and match, obtain corresponding lithology identification result.The present application can be without any experimental instrument in the lithology identification, directly through the gray value range of reaction fluorescence intensity, combined with the mapping relationship of established fluorescence intensity and mineral composition directly obtain mineral species and mineral content, both can effectively save drilling cost, and quickly, accurately identify lithology.

The present application belongs to the technical field of oil exploration, and discloses a method for evaluating the development degree of sand-mudstone reservoir-cap assemblage, which specifically comprises the following steps: conducting regional data analysis for a study area, and mastering the core / cuttings data, logging data and oil testing and production testing data of drilled wells, as well as the seismic data and seismic interpretation horizon data of the whole work area; conducting pre-stack deterministic inversion based on Zeoppritz equation to obtain the data body of the ratio of P-wave velocity to S-wave velocity in the work area; extracting the numerical value of the ratio of P-wave velocity to S-wave velocity along the sandstone layer interpreted by the seismic data to obtain the plan view of the sandstone reservoir; extracting the numerical value of the ratio of P-wave velocity to S-wave velocity along the mudstone layer interpreted by the seismic data to obtain the plan view of the mudstone cap rock; quantifying the relative development degree of the reservoir-cap assemblage by a development degree index calculation formula, constructing the plan view of the development degree index of the sand-mudstone reservoir-cap assemblage, and quantitatively dividing the development degree of the reservoir-cap assemblage. The present application can clearly define the development range of high-quality reservoir-cap assemblage, delineate the favorable exploration area, and further guide the well site deployment of exploration wells.

The invention relates to the technical field of low-permeability compact oil and gas field development, in particular to a variable-sequence fracturing method and device for improving the complexity of fractures between horizontal well sections. The method comprises the steps that a block variable-sequence fracturing model is constructed based on target horizontal well drilling cuttings logging response characteristics, target block coring rock mechanical parameters, target block ground stress parameters and target block construction data; based on the block variable-sequence fracturing model, determining a variable-sequence fracturing depth section of a reservoir along the path of a target horizontal well shaft; a target horizontal well variable-sequence fracturing scheme is determined by combining the target horizontal well construction process conditions and the target horizontal well shaft along-way reservoir variable-sequence fracturing section depth; and on the basis of the target horizontal well variable-sequence fracturing scheme, variable-sequence fracturing is conducted on the target horizontal well. The method is suitable for field requirements of staged fracturing transformation of various oil and gas reservoir horizontal wells, the adaptability to various lithologic reservoirs such as sandstone, carbonate rock and limestone is high, and the technical application range is wide.

This invention belongs to the field of natural gas extraction technology in deep thin coal and rock formations. It discloses a directional anti-sticking drill string assembly and drilling method for horizontal wells in deep thin coal and rock formations. A closed-loop control system is formed between the drill bit trajectory control mechanism and the wellbore dressing and anti-sticking mechanism, encompassing near-bit high-precision sensing, real-time data transmission while drilling, surface analysis feedback control, active downhole directional correction, and synchronous wellbore dressing and protection. Multi-directional gamma sensors positioned near the drill bit provide high-resolution formation information; the bend structure of the downhole power drill string provides the direction of the wellbore trajectory; the non-magnetic bearing section ensures the stability of measurement while drilling and the reliability of communication; the surface control unit enables real-time decision-making and trajectory correction; and the wellbore dressing and anti-sticking mechanism simultaneously improves wellbore stability and cuttings carrying capacity. This significantly enhances the drilling throughput and resistance to coal seam collapse in complex sections of thin coal and rock formations while ensuring trajectory controllability, reducing the risk of sticking due to wellbore instability and cuttings accumulation.

The invention belongs to the technical field of sandstone type uranium ore geological drilling, and particularly relates to a compact mudstone stratum coring bit suitable for sandstone type uranium ore geological drilling. According to the drill bit, the inner cutting teeth and the outer cutting teeth are arranged in a staggered mode, the top ends of the inner cutting teeth and the outer cutting teeth are located at different heights and are arranged in a stepped mode, so that in the rotating process of the drill bit, the high-position cutting teeth firstly make contact with a stratum for cutting to form a broken free face, and the low-position cutting teeth further cut to expand the formed cutting free face; a stratum cutting free surface is enlarged compared with a drill bit in the prior art, so that the effect of improving the drilling efficiency is achieved. In addition, the water gaps are evenly distributed close to the cutting teeth, and cut rock debris is removed in time.

Aspects of the present disclosure provide systems and methods for characterization of cuttings and cavings in drilling operations. A method for assessing wellbore conditions includes collecting a sample comprising rock fragments and mud from a drilling fluid, determining a rock fragment size distribution, determining a rock fragment shape distribution, determining a raw volume of the rock fragments, determining a volume correction factor using the rock fragment size distribution and the rock fragment shape distribution, determining an adjusted volume of the rock fragments from the raw volume using the volume correction factor, and assessing a wellbore condition based on the adjusted volume of the rock fragments and / or the rock fragment shape distribution.

The utility model relates to the technical field of rock debris sampling, especially to a bucket type rock debris sampling device. The bucket type rock debris sampling device is arranged on a slurry tank for receiving rock debris slurry, and a mounting frame group for fixing the sampling device is arranged on the slurry tank. The sampling device comprises a shell and a conveying mechanism arranged in the shell. A plurality of groups of material taking mechanisms are arranged on the conveying mechanism at equal intervals. A discharge hopper for receiving samples is arranged on the shell. The bucket type rock debris sampling device provided by the utility model realizes the automation and continuous sampling function of rock debris sampling. The samples taken are more representative. The conveying mechanism is driven by a motor to automatically complete the whole process of rock debris digging, lifting and pouring, greatly reducing the labor intensity and avoiding sample confusion caused by human factors, and providing more reliable analysis basis for geological personnel.

The invention discloses a high-pressure water jet drilling method and nozzle based on authigenic abrasives, and relates to the field of geological drilling equipment.The nozzle of a double-layer structure comprises a nozzle inner sleeve and a nozzle outer sleeve which are coaxially arranged together in a sleeved mode, at least one sand suction hole is formed in the side wall of the nozzle outer sleeve, and the front end of the nozzle inner sleeve is located in the nozzle outer sleeve; a confluence area is formed at the outlet of the nozzle jacket; the sand suction holes are communicated with the confluence area to generate a siphonic effect, external rock debris is sucked into the confluence area and mixed with a high-speed water column, and then the rock debris is accelerated to form high-speed abrasive water jet to impact the rock surface. Abrasive water jet is formed by self-generated rock debris of the drill bit, mechanical, hydraulic and abrasive triple rock breaking is achieved by combining rotation of the drill teeth, and the drilling speed and the rock breaking efficiency are greatly improved; the double-layer structure nozzle modular design is adopted, the structure is compact, assembling and maintaining are rapid and convenient, ground complex abrasive adding equipment is not needed, local materials are used, and zero-cost abrasive supply is achieved.

The invention provides a lithofacies paleogeography mapping method and system based on tectonic-sedimentary differentiation research. The method comprises the following steps: analyzing and determining key tectonic event occurrence and evolution processes of different key times based on a basin to be processed; geologic structure types and spatial distribution rules of different regions are analyzed, and a geologic structure partition map is comprehensively compiled; a stratum and a stratum internal structure are divided by combining logging, rock cores, rock debris and seismic data; further analyzing a structure-deposition differentiation type based on internal characteristics of the stratum, establishing a non-Wartt facies deposition-structure mode, determining a filling sequence interface division scheme, establishing a sequence stratigraphic well-connecting framework, and analyzing a stratum filling rule; main control factors are researched on the basis of the divided sedimentary facies law units, the spatial distribution law of the mapping units is analyzed, and a lithofacies paleogeography map is compiled and formed. By adopting the scheme, the problems of limited mapping mode and insufficient accuracy in the prior art can be solved, the structure development evolution condition of the sedimentary basin is reliably represented, and the map accuracy is improved.

The invention relates to the technical field of geological drilling, and discloses an intelligent geological drilling control system and method based on real-time rock debris analysis, and the system comprises a data collection module which is used for obtaining all feature data of screened rock debris and real-time drilling data, a preprocessing module which is used for preprocessing all the obtained feature data, and a data analysis module which is used for analyzing the real-time drilling data. Analysis is carried out according to the preprocessed feature data of the screened rock debris and real-time drilling data, and a drilling strategy is intelligently generated according to an analysis result; the drilling strategy generated by the data analysis module is transmitted to the execution module based on 5G communication; and the execution module is used for executing the drilling strategy generated by the data analysis module. Rock debris multi-dimensional characteristic data in the drilling process and real-time data such as ground stress and fluid activity around a drill hole are collected, interference is eliminated through a preprocessing module, the format is unified, and then a first drilling index and a second drilling index are obtained through a data analysis module.

The invention relates to a shale debris surface free water removal method applied to nuclear magnetic resonance detection. Water molecules in a water film on the surface of shale debris can interfere with accurate measurement of nuclear magnetic resonance signals of fluid in the debris and influence judgment of fluid properties in pores and reservoir characteristics. The shale debris is cooperatively treated through multiple steps of centrifugal dewatering, hot air drying, vacuum treatment and the like, free water on the surface of the shale reservoir debris can be efficiently removed, and the debris treatment efficiency is improved. In the treatment process, a mild cleaning agent is adopted, and parameters such as temperature and pressure are strictly controlled, so that damage to the structure and the property of the rock debris is avoided, and the quality of the rock debris and the accuracy of subsequent analysis and detection are guaranteed. The equipment and the process adopted by the invention are relatively simple, and the cost is low. The whole method is simple in operation process and easy to master and implement, and convenient conditions are provided for popularization and application of the method.

The invention provides a control method and device for a drilling and pole erecting all-in-one machine. The method comprises the steps that the target drilling depth and the pole erecting perpendicularity are set, and a mechanism is started; geological state data and mechanical operation data such as drill rod torque, rotating speed, feeding pressure and rock debris conveying rate are collected in real time; the drilling depth control stability is judged, and an unstable process is triggered when the drilling depth is unstable; in the process, the torque fluctuation frequency and the rock debris conveying abnormal fluctuation are cooperatively analyzed to obtain the geological suitability grade; analyzing the frequency spectrum evolution trend of the vibration signal based on the grade so as to evaluate the mechanical resonance stability; and in combination with the geological suitability grade and the resonance stability, the feeding rate and the lifting speed are dynamically adjusted by adopting fuzzy reasoning, a stable working condition parameter combination is formed, a parameter migration knowledge base is constructed, and a similar parameter template is subsequently matched to generate a cooperative control instruction. According to the technical scheme, self-adaptive parameter migration is realized, and the operation stability and safety are improved.

The application discloses a metamorphic rock surface porosity analysis and evaluation method and device, equipment and medium, relates to the technical field of oil logging reservoir evaluation, and comprises the following steps: pretreating a rock sample, scanning the pretreated rock sample, and obtaining a rock sample image; identifying and detecting the mineral and background color edge in the rock sample image and segmenting the rock gap image to obtain rock particles and determine the total particle area; adopting a threshold segmentation method to perform threshold truncation on the rock particles, calculate the pore area in the rock particles, adopt a maximum likelihood method to identify the cracks in the rock particles, calculate the crack area in the rock particles, and calculate the pore and crack areas by using the pore area and the crack area; calculating the surface porosity based on the total particle area and the pore and crack areas, analyzing and evaluating the imaging logging crack interpretation result and the surface porosity, and obtaining an analysis and evaluation result. The application can improve the accuracy and efficiency of metamorphic rock surface porosity analysis and evaluation and reduce the complexity of metamorphic rock surface porosity analysis and evaluation.

A method for characterizing natural fractures in a hot dry rock reservoir involves conducting natural fracture surveys in and around the hot dry rock mining area and performing geological statistical analysis; carrying out natural fracture analysis of drilling cores. Through the analysis of natural fractures in reservoir cores and in combination with paleomagnetism of the cores, the dip and dip angle attribute information of natural fractures in the reservoir is quantitatively determined; carrying out statistical analysis of altered minerals in cuttings. By continuously counting the amount of altered minerals in cuttings, the fracture-developed intervals are judged; carrying out logging fracture characterization based on the acoustic and electrical characteristics of fractures to identify the encountered fractures and statistically analyze the angles, properties, and density of fracture development; carrying out fine three-dimensional seismic fracture characterization, comparing the three-dimensional seismic attribute information of different fracture-developed intervals identified by logging and core logging, including ants, curvature, and maximum likelihood; comprehensively sorting out the analysis data obtained from the above steps, drawing a series of maps, and characterizing the deep hot dry rock reservoir.

The invention relates to the technical field of lithology identification, in particular to a lithology identification method and device based on fusion of a rock debris fluorescence image and a Raman spectrum, and electronic equipment. The lithology identification method comprises the following steps: dynamically segmenting a fluorescence region by applying a Gaussian weighting method according to a rock debris fluorescence image of which a corresponding rock debris sample is non-petroleum hydrocarbon fluorescence; obtaining high, medium and low fluorescence intensity area images and non-fluorescence area images, determining gray value ranges and fluorescence area proportions of the area images, and substituting the gray value ranges and the fluorescence area proportions into mineral type judgment rules for matching to obtain corresponding mineral types and mineral contents; and matching with the lithology identification rule to obtain a corresponding lithology identification result. According to the lithology identification method, the participation of any experimental apparatus is not needed during lithology identification, the mineral type and the mineral content are directly obtained by directly reflecting the gray value range of the fluorescence intensity and combining the established mapping relation between the fluorescence intensity and the mineral components, the drilling cost can be effectively saved, and the lithology can be rapidly and accurately identified.

The invention relates to the technical field of petroleum geological exploration, in particular to a real-time continuous rock debris sampling and intelligent geological logging method which comprises the following steps: S1, operating a drilling machine to perform oil and gas drilling operation, enabling mud carrying rock debris to flow to the ground along with a drill rod and a drill bit which rotate at a high speed, and separating the rock debris in drilling fluid by using a vibrating screen; s2, the separated rock debris is conveyed through a spiral conveying belt, a mechanical arm is regularly operated according to the sampling interval T to grab the rock debris to a high-speed centrifugal machine, and centrifugal drying operation of the rock debris is conducted; s3, the dried rock debris is put into a hydraulic machine, and a rock debris abrasive disc is obtained; s4, a mechanical arm is used for transferring the rock debris abrasive disc to a scanner, and a scanning image is obtained; and S5, performing feature fusion analysis on the scanned image to generate a three-dimensional geologic model. According to the real-time continuous rock debris sampling and intelligent geological logging method, through a dynamic sampling algorithm, the limitation of traditional fixed interval sampling is broken through, and the problem of rock debris leakage of rapid drilling and uncovering of a stratum is solved.