20 results about "Interbedding" patented technology

The invention relates to the technical field of mining, and discloses a method for determining pre-splitting blasting parameters for mining blasting, which comprises the following steps of: 1, acquiring rock mass structure information of a blasting area through three-dimensional geological radar, laser radar and shallow seismic reflection data, and constructing a structural plane distribution map containing a soft and hard interbed and joint combination mode; 2, initial presplitting blasting parameters are generated based on the structural plane distribution map, wherein the initial presplitting blasting parameters comprise the hole distance, the linear charge density and the charge structure; according to the method, the technical scheme that the structural plane distribution map is constructed through multi-source geological data fusion and digital twinborn simulation dynamic correction is adopted, so that the technical effects that the influence of a complex structure combination on blasting energy transfer is accurately quantified, and the presplitting path control precision is remarkably improved are achieved; compared with the technical scheme depending on a static rock mass model or an empirical formula in the prior art, the defects of presplitting path offset and serious parameter mismatch caused by the fact that modeling is not carried out due to the dynamic effect of the structural plane are overcome.

The invention relates to the technical field of geotechnical engineering disaster monitoring and early warning, and discloses a stratum rainfall seepage deformation coupling numerical simulation method and system and a storage medium, and the method comprises the steps: building a three-dimensional geologic model reflecting soft and hard rock interbed characteristics; converting the on-site rainfall data into hydraulic boundary conditions in real time; calculating a rock mass shear expansion volume change rate, determining a chemical damage acceleration factor, and updating a total damage variable; reconstructing a permeation tensor representing the dominant flow channel according to the space gradient of the damage variable; solving a fluid-solid coupling equation based on the permeability tensor, obtaining pore water pressure and calculating a displacement field; building a likelihood function by using field monitoring data to perform inversion correction on model parameters; and evaluating the stability based on the corrected calculation result and outputting an early warning signal. By constructing a mechanical coupling mechanism and a dominant flow channel model, precise simulation of a landslide evolution process in a complex geological environment is realized.

The invention discloses a method for determining anisotropic horizontal principal stress of a sand-mud interbed. The method comprises the steps that on the basis of logging data, under the assumption of a stratum transverse isotropic medium, longitudinal and transverse wave velocities perpendicular to and parallel to the stratum direction at the specified depth and longitudinal wave velocities in the direction forming a specified included angle with the stratum are determined; determining the rigidity modulus at the specified depth based on the first relation expression of the wave velocity and the rigidity modulus; determining the dynamic Poisson's ratio and the elastic modulus in the direction based on the second relation expression of the rigidity modulus and the dynamic Poisson's ratios and the elastic moduli in the direction parallel to and perpendicular to the stratum; converting the dynamic elastic modulus and the Poisson's ratio in the direction parallel to and perpendicular to the stratum into the static elastic modulus and the Poisson's ratio in the direction; and determining anisotropic horizontal principal stress at a specified depth by using a transverse isotropic stratum ground stress model based on the static elastic modulus and Poisson's ratio in parallel and vertical stratum directions. The calculation accuracy of the anisotropic rock mechanical parameters and the horizontal principal stress can be improved.

The application discloses a soft and hard interbedding type anti-inclined rock slope stability rapid analysis method based on a superimposed cantilever beam model and belongs to the technical field of rock slope stability analysis. The method comprises the following steps: soft and hard interbedding type anti-inclined rock slope calculation parameters are drafted; two adjacent soft and hard rock layers are regarded as a unit, and the characteristic height of the soft and hard interbedding type anti-inclined rock slope rock layer is determined; in combination with the characteristic height, a soft and hard rock layer superimposed cantilever beam model is established, stress analysis is respectively conducted on the soft and hard rock layers, the safety factor of the soft and hard rock layers is calculated; the stability of the soft and hard rock layers is compared, the rock layer damage sequence is considered, the influence of rock layer damage on the internal force and stability of the soft and hard rock layers is analyzed; the safety factor of the soft and hard interbedding type anti-inclined rock slope is obtained, and the overall stability of the slope is evaluated. The method can quickly evaluate the slope stability by establishing the soft and hard rock layer superimposed cantilever beam model, and the calculation method is simple.

The application discloses a method for finely depicting a shallow discontinuous channel based on seismic attributes, and relates to the technical field of oil and natural gas exploration and development. The method is based on amplitude attribute means and combined with a seismic section technology to open a time window in the time domain or the depth domain of a research object. On the basis of seismic horizon interpretation, the method controls two horizons of top and bottom surfaces, splits in the vertical direction along the horizon direction, splits a certain number of sections according to a certain proportion between the two horizons, and sequentially superimposes channel features recognized by amplitude attributes on a single section on a plane graph in sequence. Thus, the method achieves the technical method for identifying a delta front underwater channel with a mud-sand interbedding and mud-bundled sandstone combination in a shallow layer.

This invention establishes a method and system for three-dimensional facies-controlled sand body modeling and connectivity evaluation. The method is based on a dimensionality-reduction modeling architecture: a planar sedimentary facies distribution map is generated through probability-guided sequential indicator simulation; under the constraint of planar facies zones, a one-dimensional vertical sequence of interbedded sand and mud layers is independently generated point-by-point using probabilistic sampling; the planar facies map and the vertical sequence are stitched together in three-dimensional space; then, based on graph theory undirected graph algorithms, the connectivity of the three-dimensional sand body is identified using vertical depth interval overlap and non-interlayer occlusion as dual criteria; finally, connectivity uncertainty is quantified through Monte Carlo iteration. Compared with traditional full-3D grid sequential Gaussian simulation, this method is applicable to clastic reservoirs with gradual lateral variation and dominant vertical accretion (lateral variation coefficient of planar facies zones less than 0.3). It eliminates the computationally expensive three-dimensional spatial interpolation and complex structural modeling, forming a simplified engineering path of "trading computational power for uncertainty assessment," which can be used for reservoir connectivity evaluation and development scheme optimization.

The application discloses a numerical modeling method for single-pile penetration behavior in soft and hard interbedded carbonate rock strata, comprising the following steps: S1, collecting real CT data of the soft and hard interbedded carbonate rock strata, and reconstructing a multi-scale three-dimensional pore structure of a target layer based on the real CT data by using a generative adversarial network; S2, mapping the reconstructed multi-scale three-dimensional pore structure to a three-dimensional network model in a binary form, and identifying and material phase dividing pore phases and rock-soil matrix phases; S3, calibrating material parameters, establishing a soft and hard interbedded heterogeneous attribute system associated with layer sequences, hard layer thickness, porosity and interlayer combination modes, and constructing a single-pile model; S4, constructing a state parameter controlled finite element constitutive self-adaptive mechanism under a HFDEM framework; S5, constructing a pile-stratum coupling model, solving a whole process of single-pile penetration of the pile-stratum coupling model under the HFDEM framework, and outputting abnormal penetration behavior and response characteristics.

The application discloses a kind of prompting method and system for ensuring soft and hard interbedded core recovery rate, method includes:1) collecting drilling speed, drilling speed, main system pressure and mud pump pressure parameter;2) the interval value of each parameter is respectively calculated to obtain the interval mean of each parameter;3) compare the interval mean of each parameter itself adjacent respectively, if positive and negative percentage change is greater than control threshold, then it is recorded as positive mutation or negative mutation;4) combination is judged according to the mutation of each parameter, and corresponding prompt is given.The application collects relevant data and processes data, so as to scientifically and quickly identify the mutual change of soft and hard interbedded in the process of core drilling, timely remind staff of the change event and the category of change of soft and hard rock formation, so that staff can adjust drilling strategy in time, so as to ensure the core recovery rate when soft and hard interbedded core drilling is carried out.

The invention provides a shale oil reservoir high diversion fracture system construction method. The method comprises the steps that first-stage hydraulic fracturing is conducted on a target shale oil reservoir, and a hydraulic fracture comprising a main seam located in a middle shale layer, an interlayer seam extending out of the main seam and penetrating through an interlayer and a layer penetrating seam further extending out of the interlayer seam and located in the shale layer on the other side of the interlayer is formed; then, acid liquor is injected to conduct first-stage acid etching on the hydraulic fracture, and a fracture obtained after first-stage acid etching is formed; then fracturing fluid is injected to conduct second-stage fracturing on the target shale oil reservoir, crack expansion is achieved, and cracks obtained after second-stage fracturing are formed; injecting an acid solution to carry out second-stage acid etching on the second-stage fractured crack to form a second-stage acid-etched crack; and finally, a propping agent is injected, and supporting on the crack after second-stage acid etching in the target shale oil reservoir is achieved. By means of the method, the global high-flow-guiding hydraulic fracture can be formed in the shale oil reservoir of the sandstone, limestone and shale interbed.

The single-double fluid switching grouting system for the large longitudinal slope water-rich sand mudstone interbed shield tunnel is simple in structure and convenient to install, the grouting system and a sand improvement system are fused, and construction processes such as muck improvement, advanced grouting, shield tail synchronous grouting and segment grouting can be carried out in the excavation process of the shield tunnel. The designed grouting pipe and the mixer can achieve the effect of switching between single and double liquid grouting pipelines, the effects of advanced grouting for improving a soil body and shield tail synchronous grouting for rapidly fixing a pipe piece can be achieved, the pneumatic injection mode and the extrusion injection mode can be switched, and the purpose of fully supplementing grout is achieved. According to the system, the grouting system can be switched in real time according to the stratum adaptability, the engineering problems that under the large longitudinal slope water-rich sand shale interbed working condition, the soil body settlement amount is large, and water leakage is likely to happen can be solved, and the obvious effect on fixed duct piece floating resistance is achieved.

This invention discloses a method and system for evaluating the longitudinal penetration capability of fractures in sandstone-mudstone interbedded layers. The method includes: obtaining the thicknesses and minimum horizontal principal stresses of sandstone and mudstone at different layers within the interbedded layer based on the profile characteristics of the strata containing the interbedded rock formation and well logging data; establishing a longitudinal model of the sandstone-mudstone interbedded layer based on this data; conducting rock mechanics experiments on sandstone and mudstone cores from the strata containing the interbedded rock formation to obtain corresponding rock mechanics parameters; calculating the interfacial strength of the current sandstone-mudstone interbedded layer based on these parameters; and simulating the longitudinal penetration fractures of the interbedded rock formation based on the longitudinal model, rock mechanics parameters, interfacial strength, and relevant parameters affecting the longitudinal penetration characteristics of the fractures, thereby evaluating the longitudinal penetration capability of the sandstone-mudstone interbedded layer fractures. This invention can accurately evaluate the longitudinal penetration capability of fractures in sandstone-mudstone interbedded layers.

The invention relates to the technical field of oil and gas field development geology and geophysics, in particular to an ultra-deep clastic rock fractured phase characterization method based on multi-scale data fusion, which comprises the following steps: fusing field outcrop, logging and seismic data, and adopting a'trend constraint-variation function quantization-collaborative simulation 'three-step geostatistical model to characterize fractured phases of ultra-deep clastic rocks. The method comprises the following steps: firstly, establishing a clastic rock fracture facies classification scheme including a fault control sandstone type, a fault control sand-mud interbed type, a pleat control sandstone type and a pleat control sand-mud interbed type on the basis of a lithology combination, and finally, determining a control mechanism of different fracture facies spatial combinations (such as a seepage-shielding body) on a water invasion path and residual gas distribution. According to the ultra-deep clastic rock fracture phase characterization method based on multi-scale data fusion, the span of the fracture from static description to dynamic prediction is realized, and a precise geological basis is provided for efficient development and residual gas potential tapping of an ultra-deep fractured gas reservoir.

The present application relates to the technical field of mining engineering and rock mechanics, and discloses a method for analyzing the failure and earthquake-inducing mechanism of a thick interbedded sandstone roof, which comprises the following steps: first, obtaining real-time microseismic data, and quantitatively constructing a four-dimensional space-time damage field representing the internal damage evolution of the rock mass according to the real-time microseismic data; then, establishing an interlayer time-lag sliding model driven by the damage field, so as to realize the dynamic coupling of the damage state and the mechanical parameters; further, performing dynamic simulation by using the model, identifying potential failure and outputting graded early warning by using a multi-stage early warning mechanism based on a rate index and an energy dynamic instability criterion; finally, introducing a closed-loop feedback correction mechanism, and using the deviation between the actual seismic source inversion parameters and the prediction results to iteratively correct the model by using an optimization algorithm. The present application closely combines damage evolution and mechanical behavior, has self-adaptive correction capability, can reveal the earthquake-inducing physical mechanism, and improves the accuracy and reliability of analysis and prediction.

The invention discloses a sand shale interbed crack formation mechanism and evolution mode analysis method, which comprises the following steps of: setting a reasonable rock sample loading rate and shortening rate by using a particle flow numerical simulation technology according to a macroscopic structure style, and further implementing a rock mechanics experiment with a variable loading rate; the fracture strength and stress-strain evolution maps of sand / mudstone under different loading rate conditions are constructed, so that a sand / mudstone interbed fracture development mechanism under a strong stress rapid extrusion environment is disclosed, an interbed type artificial sample is prepared by using an underground sand / mudstone core sample from the similar perspective of three aspects of material composition, mechanical properties and an interbed structure, and the interbed type artificial sample is used for detecting the interbed fracture of the sand / mudstone. A loading type synchronous CT scanning experiment and a three-dimensional acoustic emission source positioning experiment are carried out, the rock fracture process is visualized, and the composite rock mass fracture evolution process is revealed. The method has important theoretical and practical values for improving the exploration success rate of the fractured gas reservoir, widening the exploration and development field and optimizing the reservoir transformation strategy.

This invention discloses a quantitative prediction method for water and sand production from natural gas hydrates, addressing the problem of the inability to quantitatively predict water and sand production in natural gas hydrate reservoirs during depressurization extraction. This invention employs multiple sets of experiments to simulate formation physical parameters, performing hydrate decomposition under different depressurization regimes and collecting water and sand production data. Finally, it establishes a cloud map of water and sand production data under different production regimes. Through this cloud map, quantitative indicators of water and sand production under a specific extraction regime can be quickly accessed, and by using certain conversion relationships, the actual water and sand production data in production wells can be obtained, thus providing reasonable guidance for the formulation of production parameters. The technical approach provided by this invention can be applied to the oil and gas field, such as sandstone and mudstone interbedded oil and gas fields, to establish quantitative prediction models and charts for water and sand production, enabling the widespread application of the invention.

The present application relates to geotechnical engineering disaster monitoring and early warning technical field, disclose stratum rainfall seepage deformation coupling numerical simulation method, system, storage medium, the method comprises: the three-dimensional geological model reflecting the characteristics of soft and hard rock interbed is established;Real-time conversion of field rainfall data into hydraulic boundary conditions;Calculate the shear dilatancy of rock mass and determine the chemical damage acceleration factor, update the total damage variable;According to the spatial gradient of damage variable, the permeability tensor representing the dominant flow channel is reconstructed;Based on the permeability tensor, the fluid-solid coupling equation is solved, and the pore water pressure and the calculated displacement field are obtained;Using the field monitoring data to construct the likelihood function to inverse modify the model parameters;Based on the corrected calculation results, the stability is evaluated and the early warning signal is output. The present application realizes the accurate simulation of the landslide evolution process under complex geological environment by constructing the force coupling mechanism and the dominant flow channel model.

The invention provides an experimental interbed core and a preparation method thereof, and relates to the technical field of petroleum and natural gas exploration and development. Comprising the following steps: acquiring a plurality of natural rock cores of interbed rocks in a research block and logging information of a stratum to be analyzed; numbering the plurality of natural cores, and respectively testing second physical properties of the numbered natural cores; calculating a second thickness corresponding to each layer in the interbed core for the experiment; a target rock core with the highest physical property similarity with each rock stratum in the underground interbed is determined from the multiple natural rock cores; cutting the target rock core according to the second thickness to obtain a rock core block with the corresponding thickness; sequentially bonding the core blocks into a whole according to the vertical sequence of the rock strata to obtain the interbed core for the experiment. The interbed core for experiment prepared by the method can truly reflect the interlayer mechanical difference of the stratum to be analyzed, the use amount of natural cores is reduced, mechanical property experiments can be carried out on any stratum, the use convenience is improved, and the experiment cost is reduced.

This invention discloses a method for displacement monitoring and instability determination in interbedded rock masses with varying thicknesses. The method includes: deploying constant-resistance, large-deformation anchor cables with multiple sensor units based on rock bedding and lithological parameters; constructing a segmented coupled interlayer constitutive model of the anchor cables to establish mechanical transmission relationships; processing sensor data using a thickness-corrected sensor fusion algorithm to eliminate interference from rock layer thickness and obtain accurate displacement fusion values; subsequently, using a statistical mechanics coupling threshold algorithm, combining rock mass mechanical parameters to calculate statistical characteristic values ​​of displacement and coupling threshold intervals; transmitting the data to an interbedded rock mass monitoring visualization platform for storage, display, and analysis; comparing the coupling threshold intervals to determine the rock mass instability trend and outputting relevant parameters. This method can comprehensively collect data, improve data accuracy and judgment reliability, effectively solve problems of data deviation, judgment lag, or misjudgment, and is applicable to rock mass monitoring and disaster early warning in mining, tunnel construction, and other engineering projects.

This invention discloses a method for assessing the stability of steeply dipping, bedding-parallel soft-hard interbedded and fault-coupled rock slopes, relating to the field of geotechnical engineering. The aim is to accurately evaluate slope stability based on the instability patterns following excavation and unloading. The technical solution employed in this invention is as follows: Before slope excavation and unloading, a geological survey is conducted to determine if the slope meets the applicable conditions. Then, for slopes meeting the applicable conditions, geological exploration is carried out to obtain quantitative parameters, including the crack penetration rate η and the rock mass integrity coefficient K. v Fault shear strength τ p The tangential component of the self-weight of the layered rock mass above the fault, σ τ Next, the deformation stage after slope excavation and unloading is determined, and the stability level is identified. Finally, after slope excavation and unloading, the slope is treated based on its stability level. This invention is used for slope stability assessment and treatment design.

This utility model discloses a dam foundation structure for a gravity dam in a sandstone-mudstone interbedded area, belonging to the field of hydraulic engineering technology. It solves the problem that existing dam foundation excavation methods in sandstone-mudstone interbedded areas cannot meet design requirements. The dam foundation structure includes: two dam foundation sections on both banks, comprising multiple sandstone slopes formed on sandstone strata and multiple mudstone slopes formed on mudstone strata, with the sandstone and mudstone slopes spaced apart and connected by walkways between adjacent slopes; the slope height of the sandstone slopes is greater than that of the mudstone slopes, and the excavation slope ratio of the sandstone slopes is less than that of the mudstone slopes; and a riverbed dam foundation section, comprising multiple exposed areas after the surface mudstone has been removed and multiple truncated areas formed on interlayered mudstone; the bottom surface of the truncated areas is sandstone strata. This utility model is used for the excavation of dam foundations for gravity dams in sandstone-mudstone interbedded areas.