1638 results about "Shale gas" patented technology

The invention relates to the technical field of data acquisition and data analysis, in particular to a hydraulic fracturing test crack propagation monitoring system which comprises a monitoring system and is used for monitoring crack propagation behaviors in the hydraulic fracturing process in real time. Constant or dynamically changing confining pressure and axial pressure are provided; the pore pressure dynamic regulation and control unit is used for accurately controlling the injection pressure, flow and saturation of fracturing fluid and simulating fracture propagation behaviors under different seepage conditions; the multi-physics field sensing monitoring network unit is used for collecting strain, sound wave signals and a surface displacement field in the crack expansion process in real time; full-scale monitoring of rock fracture propagation is realized, an influence mechanism of pore pressure and time effect on fracture evolution is disclosed, an accurate prediction means is provided for shale gas development and deep engineering, and the fracturing effect and engineering safety are remarkably improved.

The invention relates to the technical field of fracture network fracture water channel identification, and discloses an identification method for analyzing a dominant flow channel in a three-dimensional fracture network based on a topological network. According to the method, probability distribution parameters such as geometric occurrence, gap width and density of a rock mass multi-scale fracture system in a target area are obtained through field surveying and mapping and three-dimensional scanning, and a spatial topological structure of the three-dimensional fracture system is reconstructed by adopting Monte Carlo method simulation and discrete fracture network modeling technology; secondly, abstracting the fracture network into a three-dimensional topological graph model based on a graph theory principle, defining fracture center points and cross points as graph nodes, and converting fracture sections into weighted edges; the method breaks through the continuous medium hypothesis limitation of traditional seepage analysis, and has important engineering application value in the fields of deep geological energy storage reservoir seepage risk assessment, shale gas fracture network optimization design, rock slope stability analysis and the like; compared with a traditional numerical simulation method, the method has the technical advantages of being high in calculation efficiency, good in prediction precision, high in multi-scale applicability and the like.

The invention discloses a geological modeling, crack propagation and fluid-solid coupling production prediction integrated evaluation method, and relates to the field of multiple technologies, and the method comprises the steps: constructing a three-dimensional geological model of a deep shale gas reservoir; according to the construction model, the attribute model, the three-dimensional ground stress model and the rock mechanical parameter model, a hydraulic fracture model is constructed; based on the hydraulic fracture model and the three-dimensional geological model of the deep shale gas reservoir, establishing a fluid-solid coupling productivity simulation mathematical model of the deep shale gas reservoir; according to the fluid-solid coupling productivity simulation mathematical model of the deep shale gas reservoir, the fractured horizontal well yield of the shale gas reservoir is predicted, and a prediction result is comprehensively evaluated and optimized. According to the method, multiple links of geological modeling, fracture propagation simulation, fluid-solid coupling production prediction and the like are integrated, and the geological characteristics of the gas reservoir, the fracture propagation rule and the interaction between fluid flow and solid deformation are comprehensively considered, so that comprehensive evaluation and optimal development of the deep shale gas reservoir are realized.

The invention provides a shale supercritical carbon dioxide and carbon dioxide storage coupling simulation method. The method comprises the following steps: acquiring simulation information of a target research area; on the basis of the simulation information, physical scenes and chemical reaction scenes related to recovery ratio improvement of SCCO2-CO2 displacement shale gas and CO2 sequestration are simulated, and a physical simulation result and a chemical simulation result are obtained; performing data exchange on the physical simulation result and the chemical simulation result at the same time step length under the coupling effect; updating parameter information corresponding to physical scene simulation of the next time step based on a data exchange result, and returning to re-simulation until numerical simulation of a specified number of time steps is completed; after numerical simulation of the specified number of time steps is completed, a target simulation result is obtained; and calculating a carbon dioxide sequestration value based on the target simulation result. According to the method, the SCCO2-CO2 displacement shale gas can be finely and comprehensively described under the multi-dimensional condition, and the recovery efficiency and the subsequent CO2 storage process are improved.

The invention relates to the technical field of shale gas storage development and yield increase, in particular to a shale gas refracturing potential prediction method and system based on multi-modal data fusion. A data set is established according to the obtained shale gas well data, the data set comprises a multi-dimensional sequence data set and a single-valued data set, the multi-dimensional sequence data set comprises logging curve data and fracturing construction curve data, and the single-valued data set comprises geological data, reservoir physical property data, initial fracturing parameter data, production dynamic data and rock mechanics data; marking the refracturing potential of the well section through the production dynamic data; performing data cleaning and standardization processing, and dividing a data set into a training set, a test set and a verification set; and constructing a shale gas refracturing potential prediction model which meets a preset requirement and takes the multi-dimensional sequence data set and the single-valued data set as input and the refracturing effect type as output. According to the method, efficient prediction of the overall refracturing potential of the shale gas well can be realized.

The invention discloses a shale gas well middle and later period effusion intelligent diagnosis method based on LSTM and TCN models. The method comprises the following steps: S1, collecting and preprocessing multi-source time sequence data, performing sliding window segmentation, and generating a standardized data set; s2, manually marking an effusion starting point, a critical point and a process intervention point, and generating a training sample set with a label; s3, performing multi-layer expansion causal convolution on the time sequence convolutional network, and extracting multi-scale local features; s4, the modeling of the long-short-term memory network is globally dependent, and output diagnosis and early warning are discriminated; and S5, regularly collecting newly added data and diagnosis results, dynamically updating the sample set, and retraining and optimizing the model. According to the method, intelligent, efficient and real-time diagnosis and early warning of the liquid accumulation state in the middle and later periods of the shale gas well are achieved.

The invention relates to a shale gas multi-layer stacked reservoir dessert evaluation and separate layer fracturing decision-making method, and belongs to the technical field of oil-gas field development, and the method comprises the following steps: calculating porosity, adsorbed gas content, organic carbon content and vitrinite reflectance geological parameters; calculating brittleness index and fracture toughness engineering parameters; carrying out normalization processing and weight distribution by adopting a CRITIC weight method, constructing a geological-engineering comprehensive evaluation model, and dividing four types of sweet spot areas; through a mixed method of main parameter priority and abnormal value verification, preferentially analyzing interlayer gradients of high-weight parameters, and performing local fine verification on abnormal abrupt change of low-weight parameters based on a 3 sigma principle; and in combination with a rigid-flexible layering model, a fracturing layering strategy is dynamically decided, and the complexity of the fracture network is optimized. According to the method, the reservoir identification precision is improved through multi-parameter fusion evaluation, the fracturing efficiency is enhanced through dynamic hierarchical decision, the development cost is finally reduced, and technical support is provided for efficient development of shale gas.

The invention discloses a construction parameter optimization method and device based on dessert prediction, a medium and equipment, and the method comprises the steps: obtaining a data set of a shale gas well production process, and determining a dessert indication factor; training a network model by taking the data set as input and the dessert indication factor as output to obtain a dessert indication factor prediction model; optimizing the dessert indicator factor prediction model by using a Bayesian hyper-parameter optimization algorithm, and inputting a data set obtained in real time into the optimized dessert indicator factor prediction model to obtain a prediction result; inverting a prediction result into three-dimensional space distribution characteristics of desserts in the shale reservoir; and determining contribution values and partial dependency relationships of the plurality of geological parameters and the plurality of engineering parameters to a prediction result based on the three-dimensional space distribution characteristics, deploying construction parameters according to the contribution values and the partial dependency relationships, and synchronously updating a sweet spot indication factor prediction result to realize spatial dynamic optimization and adjustment of the construction scheme. Through the scheme, the construction parameters can be scientifically optimized.

The invention discloses a water injection induced earthquake monitoring and fault activation detection system, and belongs to the field of earthquake monitoring and fault activation detection. The earthquake observation module is used for obtaining earthquake monitoring data; the seismic phase data extraction module is used for carrying out micro-seismic identification according to the seismic monitoring data to obtain seismic phase data; the earthquake initial positioning module is used for obtaining an earthquake directory of initial positioning; the earthquake fine positioning module is used for carrying out secondary positioning to obtain an earthquake directory of fine positioning; the fault and structure modeling module is used for integrating the finely positioned seismic catalog into a three-dimensional geologic structure model and carrying out spatial positioning and visualization of seismic activities; and the fault activation and earthquake risk analysis module is used for analyzing the earthquake activity time change trend, b value change, fault activation and earthquake risk according to the three-dimensional geologic structure model. The method solves the problem that an existing method lacks monitoring of fault activation and weakening of the shale gas development area and water injection induced earthquakes.

The invention provides a deep sampling device for shale gas exploration, and relates to the technical field of sampling devices. A stabilizing part is arranged at the top of the fixing part; a manual control part is arranged in the stabilizing part; a sampling part is arranged below the manual control part; the conveying port is formed in the sampling rod, so that water can be conveniently conveyed, stone chips can be conveniently washed under the flowing of water, the stone chips between the sampling rod and the rock rod can be conveniently cleaned, a gap is formed between the sampling rod and the rock rod, the rock rod can conveniently slide out, and the integrity of a sample is kept; the problems that in the sampling process, as rock scraps exist between a drill rod and a rock sample rod, the rock sample rod is retained in the drill rod, the drill rod needs to be knocked when the rock sample rod is taken, the scraps flow out to assist the rock sample rod to be discharged, and the sampling efficiency is high are solved. And the problem of fracture of the rock drill rod during taking is avoided.

The invention provides a high and low temperature true triaxial fracturing, seepage and microscopic monitoring experiment system and method. The system comprises a three-dimensional model and a reaction kettle module, the triaxial stress loading module is arranged at the bottom and the periphery of the cavity of the three-dimensional model and reaction kettle module; a fracturing module; a temperature control module; and a crack monitoring module. Through internal and external integral temperature control, large-range temperature adjustment and stable control of-15 DEG C to 130 DEG C are realized; monitoring points such as acoustic emission, resistivity and the like are carried to explain and analyze the dynamic change rule of the crack in real time; through the innovative structural design of the device, the functions of kettle body sealing, high-stress-difference triaxial synchronous loading, radial uniform seepage and the like are achieved, the experimental requirements of hydrate in-situ generation and decomposition, large-size rock sample saturation, high-stress-difference fracturing experiments and the like are met, the true-triaxial large-physical-model experimental application scene is expanded, and the experimental efficiency is improved. And technical support is provided for fracturing transformation process optimization, scheme design and the like of unconventional oil and gas resources such as deep shale gas and hydrates.

The invention belongs to the technical field of petroleum engineering, and discloses a shale gas reservoir apparent permeability prediction method and a related device, and the method comprises the steps: obtaining data; judging a gas flow state; establishing a shale gas mass migration model; establishing apparent permeability models of capillary tubes with different sizes; obtaining a shale reservoir apparent permeability model; carrying out transfer learning; according to the method, the influence of the reservoir effective stress and the shale water saturation on the permeability is comprehensively considered, the neural network model is adopted to obtain the effective flow radius, and the prediction accuracy is improved; by introducing the permeability correction coefficient, dynamic correction of the original permeability value is realized, so that the actual permeability can be reflected more accurately; according to the method, by adopting transfer learning, a specific type of shale reservoir apparent permeability model is transferred to other conditions, so that the model can be used for predicting the permeability of different types of shale reservoirs, and the universality is effectively improved.

The invention relates to the technical field of oil and gas field development, in particular to a method for realizing CO2 storage and H2 injection and production by utilizing a shale gas well, which comprises the following steps: acquiring geological and development data of a target shale gas well reservoir, and selecting the shale gas well suitable for CO2 storage and H2 storage as a pre-selected well; cO2 is injected into the pre-selected well to conduct fracturing transformation in the mode that the pressure is higher than the reservoir fracture pressure, and the shale gas well is soaked; shale gas production is conducted, and after shale gas production is stopped, CO2 is injected again for geological storage; h2 is injected into the pre-selected well in the mode that the pressure is not higher than the reservoir fracture pressure, and when the hydrogen storage amount reaches the preset hydrogen storage amount or the internal pressure value of the gas reservoir reaches the safety upper limit, H2 injection is stopped; and when H2 needs to be used, hydrogen is extracted for the same shale gas well, and high-purity hydrogen is obtained. According to the method, the shale gas recovery efficiency is improved by injecting CO2 into the shale gas well, and CO2 storage is achieved to the maximum extent while conversion from the shale gas reservoir to the hydrogen reservoir is achieved.

The invention relates to the technical field of logging evaluation of a shale gas reservoir geologic model, and discloses a logging evaluation method suitable for the shale gas reservoir geologic model, which comprises the following steps: collecting and arranging logging data, including natural gamma, resistivity, interval transit time, density and neutron logging curves, based on geological data and logging data of adjacent wells, an initial geological model of the shale gas reservoir is established, a logging curve is preprocessed, including depth correction, environment correction, data smoothing, utilization of response characteristics of the logging curve, identification of cracks and stratification in the shale gas reservoir, and utilization of the logging data to calculate physical property parameters of the shale gas reservoir. According to the logging evaluation method, a plurality of reservoir parameters including the organic carbon content, the thermal maturity, the porosity, the permeability, the water saturation, the fracture development degree and the like can be obtained, and the comprehensive analysis of the parameters can more comprehensively reflect the reservoir characteristics, so that the accuracy of a geologic model is improved.

The invention discloses a shale hydrocarbon expulsion efficiency evaluation method, device, equipment and medium, and relates to the technical field of shale gas exploration and developing.The shale hydrocarbon expulsion efficiency evaluation method includes the steps that hydrocarbon generation quantity charts of shale under different total organic carbon TOC grades are constructed; testing the water saturation of the core sample of the shale to obtain the water saturation rate of the core sample; carrying out oil washing treatment on the rock core sample, and carrying out porosity test to obtain rock porosity and rock apparent density; obtaining a crude oil sample of a production layer where the core sample is located, and performing a crude oil physical property experiment to obtain crude oil density; when key parameters such as water saturation rate, rock porosity, rock apparent density, crude oil density and shale hydrocarbon generation quantity charts under different total organic carbon TOC grades of a core sample and key parameters of hydrocarbon release and migration in a hydrocarbon expulsion process are measured, a dynamic measurement process is adopted, and the dynamic measurement process can realize dynamic simulation of a hydrocarbon migration path; and finally, accurate evaluation of the shale hydrocarbon expulsion efficiency is realized.

The invention relates to the technical field of carbon dioxide sequestration and shale gas development, and particularly discloses a shale micro-nano pore multiphase multicomponent competitive adsorption data determination method and device, and the method comprises the steps: obtaining a shale core sample of a target area, and determining the type and relative content change characteristics of surface functional groups of the shale core sample; key structures and force field parameters of shale clay minerals in a target block are collected, and a shale clay mineral molecular model is established; establishing a plurality of fluid molecular models; establishing slit models, and establishing a multiphase fluid system model between the slit models to obtain a stable configuration; applying an external electric field to the stable configuration, and performing molecular dynamics calculation to obtain molecular trajectory coordinates and dynamics information of the multi-phase multi-component fluid; and calculating competitive adsorption data of the shale micro-nano pore multi-phase multi-component fluid under the action of the electric field. According to the scheme, the occurrence state and the competitive adsorption behavior of the shale micro-nano pore multi-phase multi-component fluid under the action of the electric field can be disclosed from the molecular scale.

Embodiments of the present invention relate to the technical field of shale gas development, and provide a method and system for predicting the maximum horizontal principal stress of shale gas reservoirs. The method comprises: performing cross-arranged gather extraction on acquired original shot gathers to obtain corresponding OVT gathers, and preprocessing the OVT gathers; acquiring well logging data, performing well-to-seismic calibration and seismic horizon interpretation on the basis of the well logging data, and obtaining an interpreted horizon of the current reservoir that meets in-situ stress prediction as a target horizon; constructing a low-frequency model on the basis of the well logging data and the target horizon, and calculating a Poisson's ratio and a fracture density on the basis of the low-frequency model; calculating a vertical principal stress of the target horizon on the basis of a velocity field, a formation density and a density inversion body; and calculating the maximum horizontal principal stress of the current reservoir on the basis of the Poisson's ratio, the fracture density, the vertical principal stress and a preset principal stress solving model. The solution of the present invention solves the problem of low accuracy in existing solutions for predicting the maximum horizontal principal stress of shale gas reservoirs.

The utility model discloses an integrated skid-mounted device of double vertical sand removers, which relates to the technical field of shale gas sand removal and comprises a skid-mounted base, a sand remover body and a process pipeline connected with the sand remover body, a gas inlet is arranged at the upper end of the sand remover, a gas outlet is arranged at the lower end of the sand remover, and a drain outlet is arranged at the bottom of the sand remover. The two vertical sand removers are parallelly suspended on the prying base, the sand removers are provided with maintenance platforms, and the maintenance platforms are provided with ladders and guardrails; the process pipeline comprises a gas inlet pipeline and a gas outlet pipeline; one end of the gas inlet pipeline is connected with a gas inlet of a high-layer desander; the other end of the gas inlet pipeline is connected with a low prying base in parallel; one end of the gas outlet pipeline is connected with a gas outlet of the high-layer desander and the other end of the gas outlet pipeline is connected with the low prying base in parallel; one end of the blow-off pipeline is connected with a blow-off port of the high-layer desander, and the other end of the blow-off pipeline is connected with the low prying base in parallel. The desander can be used for desanding efficiently, and is high in integration level, simple to mount and easy to carry.

The invention discloses a shale gas well dessert prediction method and device based on integrated learning. The method comprises the steps of obtaining main control factors and feature data of a shale gas well to be predicted, and inputting the main control factors and the feature data into a trained dessert prediction model to obtain dessert prediction data; the model training process comprises the following steps: determining main control factors influencing the dessert according to the correlation between each parameter in the prediction data of the sampled shale gas well in the target area and the dessert; the prediction data comprises first data and second data, the first data comprises geological data, perforation data and oil and gas production data, and the second data comprises logging data and fracturing construction data; performing feature extraction on each parameter in the second data to obtain feature data; constructing a training data set according to the main control factors and the characteristic data of the shale gas well; and training the dessert prediction model based on the training data set. The accuracy of a prediction result can be improved, and fracturing design is effectively guided.

The invention relates to a low-permeability shale gas-water two-phase relative permeability determination method and system, T2 spectrum curves corresponding to different pretreatment modes are obtained based on nuclear magnetic resonance, the moisture occurrence state in sample pores is determined, the pore types of low-permeability shale are divided, and corresponding critical pore sizes are obtained; according to a Hagen-poiseuille equation and gas-water distribution characteristics of different pore types, determining the flow velocity of a gas phase and a water phase in a single shale pore, and determining the corresponding fluid flow in the single pore according to the flow velocity; the total flow of gas-water two-phase fluid in the low-permeability shale pore network is obtained based on the fractal theory, the critical pore diameter and the flow; based on the total flow velocity, the phase permeability of the gas phase and the water phase and the absolute permeability of the low-permeability shale are obtained through the Darcy law, and the relative permeability is determined; and according to the distribution characteristics of the gas-water two-phase fluid in the pores, determining the water saturation of the low-permeability shale, and determining the gas-water relative permeability of the low-permeability shale under different water saturation.

The invention discloses a deep shale dessert evaluation method based on a high-temperature and high-pressure rheological experiment, and relates to the technical field of petroleum and natural gas exploration and development. The invention provides a new thought about deep dessert evaluation: under the condition of simulating high temperature and high pressure of a deep stratum, macro and micro scales before and after shale rheology are compared and analyzed, and pore size distribution, adsorption and desorption characteristics and microstructure characteristics before and after a shale high-temperature and high-pressure rheology experiment are analyzed. The evolution characteristics of the pore structure in the deformation process are analyzed approximately dynamically, so that a deep shale dessert evaluation model is established preliminarily. According to the method, desserts of deep shale characteristics are developed, the source and storage of rich gas of shale gas and flow of a fracturing transformation and permeation enhancement mechanism under high temperature and high pressure are evaluated, and in other words, reservoir comprehensive evaluation before development is paid attention to in shale gas dessert evaluation or whether complex cracks are formed or not after shale fracturing is paid attention to more attention to shale gas dessert evaluation.

The invention relates to the technical field of oil development, in particular to a shale oil and gas fracturing sliding sleeve capable of being opened and closed repeatedly and a using method. According to the technical scheme, a central pipe fracturing liquid inlet is formed in the upper side of a central pipe, and a reversing rail is arranged on the surface of the outer wall of the middle; a sealing cylinder sleeve and a one-way circulating valve carrier are sleeved outside the central pipe, a fracturing piston, a swivel pressing cap and a reset spring are installed in an annulus, a constant-pressure opening cavity is formed in the inner wall of the fracturing piston, a swivel is installed in the swivel pressing cap, a track pin is installed in the swivel, and the position is moved along a reversing track on the surface of the outer wall of the central pipe through the track pin. The fracturing piston moves downwards to the position of the cylinder sleeve fracturing liquid outlet under the action of pressure, the fracturing function is started, fracturing liquid is sprayed out along the cylinder sleeve fracturing liquid outlet to enter a target fracturing layer, fracturing construction of a plurality of fracturing layers can be achieved through multiple times of fracturing liquid injection and injection stopping, the fracturing sliding sleeve can be repeatedly opened and closed, and the fracturing construction efficiency is improved. And fracturing construction requirements of shale oil and gas with different layers can be met.

The invention relates to an infinite intelligent regulation and control fracturing sliding sleeve which is particularly suitable for development of unconventional oil and gas resources such as shale gas and tight oil. The concrete structure of the infinite intelligent regulation and control fracturing sliding sleeve dart part comprises an outer shell, a lower baffle disc, an upper baffle disc, a bolt, a spring, a clamping ring, a blocking ball, a thrust block, a thrust bearing, a flow dividing block, a motor, a flow divider, a capacitive sensor, a silicon rubber sealing piece, a control module and a flow divider end cover. When the infinite intelligent control fracturing sliding sleeve dart part passes through a designated position, the infinite intelligent control fracturing sliding sleeve dart part judges and counts each part needing to be fractured through the three capacitive sensors, when a preset value is reached, the tool is switched to an activated state, the blocking ball is impacted under the pressure of drilling fluid, and the part needing to be fractured is fractured. The thrust block is pushed, the thrust block opens the piston on the casing pipe under the pressure building effect, and fracturing operation is achieved. And the limitation of the size of a steel ball in the traditional ball throwing type sliding sleeve technology is avoided, the operation complexity is reduced, the construction efficiency is improved, and a new technical means is provided for efficient development of unconventional oil gas.

The invention provides a shale gas reservoir pressure fracture network expansion numerical simulation method, which comprises the following steps of: performing multi-layer coring scanning on a shale gas reservoir, and constructing a three-dimensional digital core model; constructing digital core flow numerical simulation by adopting a lattice Boltzmann method to obtain flow physical parameters; constructing digital rock core strain simulation by adopting a finite element method to obtain rock mechanical parameters; establishing a shale gas reservoir complex fracture network expansion mathematical model by considering a fluid-solid coupling effect, and constructing a numerical solution algorithm by combining a finite element method and a finite volume method; constructing a quantitative characterization method for the shape of the fracture network after pressing, and evaluating the size and complexity of the transformed fracture network; the method fills the gap of fracturing simulation technology research, and has the characteristics of high calculation precision, short calculation period and low cost.

The invention discloses a shale gas well flowback system optimization method based on distributed optical fiber data mining, which combines with the current advanced distributed optical fiber (DTA / DAS) monitoring technology to'sense 'underground temperature and'listen' underground sound, and the optical fiber monitoring result can quantitatively evaluate the shale gas well fracturing modification effect, so that the shale gas well flowback system optimization method has the advantages that the shale gas well flowback system optimization method is high in practicability. And judging the gas production and liquid production profile distribution effect of the whole well section of the gas well. By mining optical fiber data in a gas well flowback stage, the gas well fracturing cluster efficiency and the artificial fracture flow conductivity are comprehensively considered, the maximum flowback oil nozzle of the gas well is optimized, and gas well flowback system optimization work is achieved.

The invention provides a method for preferably selecting a shale gas structure storage favorable area not based on formation pressure. The method comprises the steps that a target research area is selected, and a core exploration target layer series is determined; on the basis of a target stratum shale gas preservation mechanism, core parameters independent of stratum pressure data are screened, and a comprehensive evaluation index system containing target stratum self-sealing performance, regional cover stratum conditions and structural transformation action parameters is constructed; spatial distribution analysis is carried out on each parameter, grading is carried out according to geological laws and adjacent region experience, and weight coefficients are distributed according to the influence degree of the parameters on storage conditions; obtaining a comprehensive score of the structure storage condition of each evaluation unit through grade assignment and weighted stacking calculation; and delineating a shale gas structure storage favorable area according to the comprehensive score. The method is suitable for low-exploration-degree areas with complex structures, sparse drilling wells or lack of formation pressure data, and has the advantages of objective evaluation, high operability and high practical value.

The present invention belongs to the field of shale gas technology, and in particular to a shale gas rapid desorption test device and method. Aiming at the problem that shale gas molecules have strong adsorption force and are difficult to desorb, and the shale itself has low permeability, resulting in a long experimental time for shale gas desorption test, the following scheme is proposed, including a main box, wherein a crushing and screening module is arranged inside the main box, and the crushing and screening module includes a base and a fixed cylinder, the base and the fixed cylinder are fixedly connected to the bottom inner wall of the main box, the inner wall of the fixed cylinder is slidably connected to a mounting cylinder, an acceleration module is arranged on the mounting cylinder, and a tray is fixedly connected to the bottom inner wall of the mounting cylinder. A shale gas rapid desorption test device and method disclosed by the present invention can make shale sample particles vibrate in the vertical direction during desorption, and at the same time, stirring with a stirring paddle can make the gas inside the shale sample more fully contact the desorption environment, thereby accelerating the desorption process.

The utility model provides a cable tensile strength testing device, and relates to the technical field of deep shale gas horizontal well fracturing. The first clamping and fixing mechanism is used for clamping and fixing a ferrule structure of the tested cable, and the ferrule structure is formed by bending one end of the cable into an arc-shaped closed loop; the rope sleeving column is transversely connected to the base in a sliding mode, and the loop structure can be connected to the rope sleeving column in a sleeving mode; the tension detection mechanism comprises a tension detector, one end of the tension detector is connected with the rope sleeving column, and the other end of the tension detector is connected with the base; the winding mechanism comprises a winding roller and a driving motor which are in transmission connection, the winding roller is installed on the base, and a containing groove is formed in the side wall of the winding roller; and the second clamping mechanism is arranged in the accommodating groove and is used for clamping and fixing the other end of the cable. And through the arrangement of the winding roller, the cable can be pulled, and the device can adapt to cables with different lengths.

The invention relates to a shale gas well oil pipe size optimization method considering liquid accumulation influence. The problems of serious liquid accumulation influence, difficulty in optimizing the size of an oil pipe and the like in the whole production period of the shale gas well are solved; according to the technical scheme, according to a wellbore pressure drop calculation method considering the liquid accumulation influence, the daily wellbore pressure drop and the liquid accumulation amount of oil pipes of different sizes in the whole production cycle of a gas well are predicted, the influence of the wellbore pressure drop and the liquid accumulation amount in the whole production cycle is comprehensively considered, and the comprehensive utility value of the oil pipes of different sizes is obtained through calculation. By comparing the comprehensive utility values of the oil pipes with different sizes, the optimal oil pipe size is optimized; according to the shale gas well oil pipe size optimization method considering the liquid accumulation influence, the influence of the change of the liquid production capacity of the shale gas well in the whole production period on the oil pipe liquid accumulation is considered, and efficient and stable production of the shale gas well in the whole production period is promoted.

The invention belongs to the technical field of oil and gas well development, and particularly relates to a shale gas well gas lift dredging method. According to the method, the gas lift pressure is obviously reduced to 40-60% through comprehensive means such as foam drainage liquid filling for reducing the gas well accumulated liquid density, short-time annular gas lift, wellhead return pressure reduction for the gas lift, oil jacket pressure balancing for reducing the hydrostatic liquid column height and alternate positive and negative lift, and multiple cooperation is conducted, so that the gas lift pressure is obviously reduced to 40-60%, the gas well recovery production progress can be accelerated, the gas lift effect is improved, and the gas well recovery efficiency is improved. The production recovery cost is reduced. In the process of lifting the deep shale gas well, gas well lifting can be achieved by optimizing gas lifting operation steps on the basis of existing gas lifting equipment, effective gas lifting can be achieved by means of the technical method under the influence of factors such as high temperature and high pressure, shaft corrosion and sand production of the deep shale gas well under different conditions, and the success rate reaches up to 80%.