164 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 fracturing engineering dessert evaluation method based on a while-drilling rock debris indentation mechanical parameter test. The fracturing engineering dessert evaluation method comprises the following steps: S1, obtaining a while-drilling rock debris sample; s2, processing the rock debris sample while drilling into a casting body sheet; s3, acquiring micro-mechanical parameters of each test point; s4, obtaining macromechanical parameters of the rock debris sample; s5, core triaxial mechanical parameters of reservoir rock are obtained; s6, establishing relevance between micromechanical parameters of the while-drilling debris sample and triaxial mechanical parameters of the rock core, and correcting the micromechanical parameters obtained by a subsequent indentation method to obtain rock mechanical parameters of different well depths of the horizontal well section; S7, respectively carrying out weighted average treatment on the obtained rock mechanical parameters, and proposing a fracturing index; and S8, according to the fracturing indexes, a K-clustering analysis method is adopted, and the horizontal section stratums are classified and evaluated according to the three types of reservoir stratums. The horizontal well mechanical parameter testing and reservoir compressibility evaluation method is formed through the fracturing indexes, and a traditional reservoir evaluation method mainly based on geology is changed.

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 the technical field of geological rock type identification, and discloses a deep carbonate rock lithology identification method based on gamma-ray spectrum logging, and the method comprises the steps: S1, collecting a large number of rock cores, slices and the like as verification data; s2, performing statistics on slice identification results of 4, 6, 7 and 8 well carbonate rock coring layer sections of the ancient city in the research area, and dividing the carbonate rock in the research area into five types, namely grit limestone, mud crystal, bright crystal grit limestone, mud crystal limestone, cloud limestone and dolomite; and S3, calibrating on a single well histogram, and counting gamma-ray energy spectrum (U, K, TH, PE) values corresponding to the slice samples. According to the method provided by the invention, the lithology of the carbonate rocks in the fourth, sixth, seventh and eighth wells of the ancient city is identified with relatively high accuracy, fine lithology changes are further identified in the originally explained large set of limestone, the accuracy is far higher than that of logging and debris logging through rock core inspection, and the accuracy of identifying the lithology of the carbonate rocks is greatly improved.

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 a fractured reservoir productivity prediction method and device based on seepage capacity point-by-point integration, a medium and equipment. The method comprises the steps that logging data and rock debris logging data of a fractured reservoir are obtained; measuring to obtain mineral components of the full-diameter rock core sample, and analyzing porosity and permeability of the full-diameter rock core; the relative error between the logging porosity and the full-diameter core analysis porosity is smaller than 8%; the relative error between the logging permeability and the full-diameter core analysis permeability is smaller than half order of magnitude; dividing an oil layer, a gas layer, a water layer, a dry layer and a non-reservoir layer of the fractured reservoir; point-by-point integration is conducted on the logging permeability according to the depth of an oil layer or a gas layer, and the relation between the integration result and the oil and gas flow of a test layer section is established; obtaining a crack width lower limit value according to a developed crack, a non-developed pore and a crack width characteristic value of a layer section with the logging permeability of Stoneley wave inversion greater than 0.5 mD; carrying out back calculation to obtain a productivity index; and predicting the productivity of the fractured reservoir.

The invention relates to the technical field of horizontal well monitoring, in particular to a shale oil horizontal well trajectory judgment method based on rock debris mineral parameters, which comprises the following steps: taking to-be-analyzed rock debris of a newly drilled horizontal well for sample preparation to obtain a rock debris sample; obtaining mineral information of the rock debris sample by using an automatic mineral identification system; and screening the mineral information of the rock debris sample by using the mineral characteristic standard of each small layer to obtain the small layer to which the rock debris sample belongs. The rock debris of the horizontal well is used for manufacturing the rock debris sample, the automatic mineral recognition system is used for obtaining the mineral information of the rock debris sample, the small layer position corresponding to the mineral information of the rock debris sample is obtained in combination with the mineral characteristic standard of each small layer, and compared with rock core sampling, the mode for achieving small layer judgment is low in cost, the sample is easy to obtain, and the accuracy is high. The method is suitable for wide popularization.

The system extracts water from lunar regolith and includes a regolith intake having a digging bucket that collects lunar regolith soil and a gravel separator that separates and discharges gravel and passes a mixture of ice-regolith powder having ice grains that are about 10-100 microns along the conveyor. A pneumatic separator receives the ice-regolith powder and pneumatically splits the ice-regolith powder into streams of different sized lithic fragments and ice particles per the ratio of inertial force and aerodynamic drag force of the lithic fragments and ice particles. Each split stream may include a magnetic separator that separates further the magnetic and paramagnetic lithic fragments from ice particles to discharge up to 80 percent of lithic fragments to slag.

The invention discloses a method for judging crude oil density based on a three-dimensional quantitative fluorescence technology and a related device. The method comprises the steps of obtaining fluorescence data of a rock core and rock debris; performing mathematical statistics, parameter extraction, combined calculation and sensitivity screening on the fluorescence data to obtain oil index parameters; and establishing a two-dimensional evaluation chart according to the oil index parameters, and displaying different crude oil density distribution areas. According to the method, parameters such as fluorescence excitation, emission wavelength, oil concentration, crude oil fluorescence intensity, well completion oil testing crude oil density and the like of a rock core and rock debris three-dimensional quantitative fluorescence technology are obtained through mathematical statistics, parameter extraction, combined calculation and sensitivity screening, and the corresponding relation between the three-dimensional quantitative analysis wavelength and the fluorescence intensity parameter is fully excavated and utilized; the correlation is analyzed, the accuracy of the obtained result is higher, and the error range is smaller than 5%.

The invention belongs to the technical field of oil-gas field development fracturing, and provides a method for identifying propping agents in rock debris and mud and application. According to the identification method, sample image particles are analyzed by using sphericity, transparency TR and red-blue difference YCf to identify the proppant; firstly, sphericity analysis is carried out on a sample particle image through Hough circle transform CHT, and solid particles with substandard sphericity are eliminated; secondly, excluding solid particles with substandard transparency through the image transparency TR; then, mineral particles are further eliminated through the red and blue color difference YCf of the image, and finally particle size measurement is conducted to obtain a proppant distribution result. According to the method, proppant particles are identified from a mixture of rock debris and mud, the spatial position and distribution of the proppant in a whole well section are obtained, the migration and paving effects of the proppant are further evaluated, and a visual fact basis is provided for the paving rule of the proppant in a hydraulic fracture under the real stratum condition.

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.

The invention relates to the technical field of oil-gas exploration, in particular to a method and device for determining stratum rock mechanical parameters based on rock debris. Compared with a traditional rock mechanical parameter determination method, the method for determining the stratum rock mechanical parameters based on the rock debris is simpler, more effective and low in test cost, and the problems that an underground rock core is difficult to obtain and the economic cost is high in an existing method are solved. According to the method, a numerical simulation mode is adopted, based on adjacent well parameter correction, the formation lithology can be rapidly and accurately recognized, the formation rock mechanical parameters can be obtained, and technical support is provided for optimization of drilling parameters and prevention of underground complexity.

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 invention belongs to the technical field of oil and gas field exploration and development, and particularly relates to a thin-layer shale microstructure description method. The method comprises the specific steps that marker beds are divided in a horizontal well shale target window, the marker beds are judged in real time through while-drilling natural gamma and rock debris characteristics, on the basis of the change of the thickness of strata between the marker beds, the dip angle and tendency of the strata are calculated according to the intersection relation between the marker beds and well trajectories, and then micro-structure description is conducted on a target area. The method has the advantages of being lower in cost, sufficient in data source and high in accuracy, thin-layer shale microstructure depiction can be achieved, powerful basis can be provided for well trajectory adjustment in the drilling process of the horizontal well, and basis can be provided for optimization of well trajectories of adjacent horizontal wells to be drilled in a well factory mode.

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 invention discloses a method and a device for predicting microscopic rock mechanics characteristic parameters of a compact sandstone reservoir. The method comprises the following steps: acquiring Young modulus of rock debris; lithology and particle size parameters; porosity and pore throat parameters; and mineral composition; the Young modulus serves as a target parameter, the lithology, the particle size parameter, the porosity, the pore throat parameter and the mineral composition serve as input parameters, a rock debris microscopic rock mechanics model is established, and predicted rock mechanics characteristic parameters are output. And prediction of microscopic rock mechanics parameters of the rock debris is realized.

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.