33 results about "Invasion depth" patented technology

An endoscope system is provided in which blood vessels (pits) are extracted from an image captured by an endoscope to perform pattern matching with vascular patterns (pit patterns) associated with the cancer invasion depth and operations such as enhanced display of blood vessels, suggestion of preferred imaging conditions and display for diagnosis support are performed based on the matching result. The endoscope system enables even a less-experienced doctor to correctly diagnose the cancer invasion depth.

The invention provides a composite type leakage plugging agent for an oil-based drilling fluid. The composite type leakage plugging agent for the oil-based drilling fluid comprises the raw materials by the weight percentage: 20%-50% of a leakage plugging material, 0.5%-2% of a fiber material, 5%-20% of an oil swelling material, 20%-40% of a lipophilic superfine particle material, and 10%-20% of a lipophilic flaky material. The leakage plugging agent mainly aims at leakage prevention and plugging requirements of permeable formation and fractured leakage formation encountered by an oil-based drilling fluid system during drilling, and the compressive strength can reach 7 MPa for 5 mm cracks; in sand bed evaluation tests, the invasion depth reduction rate is more than 90%. The composite type leakage plugging agent can significantly improve the leakage plugging success rate of the oil-based drilling fluid and enhances the formation bearing ability.

The invention provides a tester for the bearing and plugging strength of a mud cake under high temperature and high pressure, which can simulate the static conditions in a well and test the invasion depth of slurry filter liquid, bearing strength of mud cake, plugging and bearing strength against cracks in drilling for oil (gas) wells. The tester essentially comprises a mud-cake performance evaluation and test vessel assembly, a pressure pipe system, a temperature control system, a displacement record system, an automatic cleaning system and a computer data processing system. The tester allows all-sided simulation of the temperature, pressure and stratum features (seepage) under a well, determination the plugging and bearing strength of mud cakes, optimization of drilling fluid, rapid and safe drilling, therefore the tester is of a very wide application prospect.

The invention discloses a method for identifying attitude of a stratum and an inversion method of stratum parameters. The methods include the steps of obtaining Well-logging curves on each counter electrode of an electrical imaging device; conducting pre-hierarchy on each composite log to obtain a pre-hierarchy interface location of each Well-logging curve; successively choosing depth segments containing pre-hierarchy interfaces as reference segments, conducting a correlation contrast on the Well-logging curves on other counter electrodes to obtain an effective layer interface of each Well-logging curve; ranking the effective layer interfaces of the Well-logging curves on all counter electrodes by depth, obtaining a stratum interface and calculating attitude information. Further more, based on the stratum hierarchy, a forward model is formed by combining the information of dual laterolog; by inversion, mud invasion depth and specific resistance of invaded zones and undisturbed zones are obtained. The stratum interface extracted by the methods matches with logging images pretty well, the attitude information is more precision, and the stratum parameters obtained by inversion can achieve quantitative description of invasion features of mud.

The invention discloses an electromagnetic propagation resistivity logging joint inversion method based on parallel computing technology. The method comprises following steps of A: loading electromagnetic propagation resistivity logging data; B: performing smooth filtering and automatic layering for logging curves; C: selecting stratum model invasion depth and invasion electrical resistivity according to curve separation degree; D: calculating electromagnetic propagation resistivity logging response of corresponding depth points of measured curved by use of the limited element method based on multinuclear parallel or GPU parallel computing technology; and E: calculating a relative error of the forward simulation response value and measured data, outputting the model value to be the inversion result if the relative error is smaller than a set threshold value, and if not, calculating variable quantity of the model, resetting stratum model parameter, and returning to the step D until outputting the reversion result according to the Marquette iterative algorithm. According to the invention, the method is quick inversion calculating speed, high in precision, suitable for server invasion of mud, and capable of providing technical support for storage layer evaluation and pollution level evaluation of the storage layer.

The invention relates to a method and a system for measuring the invasion depth of a drilling fluid filtrate in a reservoir. The method comprises the following steps: measuring discrete filtration loss in a plurality of time segments; determining relevance between the time and the filtration loss through regression analysis; determining actual invasion volume of the drilling fluid filtrate according to the relevance between the time and the filtration loss; determining theoretical invasion volume according to drilling information; determining the invasion depth according to the actual invasion volume and the theoretical invasion volume. The system comprises a module for determining relevance between filtration loss and time, a module for determining actual invasion volume, a module for determining theoretical invasion volume and a module for determining invasion depth. The method and the system for measuring the invasion depth of the drilling fluid filtrate in the reservoir are simple and practical, and high in operability; in addition, compared with a permeability recovery value method in the prior art, the method has the advantages of excellent reproducibility and high reliability of judging results.

The invention relates to a method for evaluating the invasion degree and influence of mud invading into an ultra-low-permeability oil layer. The method includes the steps that according to geologicallogging, experimental analysis, fracturing test mining and other data, on the basis of dynamic analysis, a seepage theory, a material balance principle and combination of dynamic analysis and static analysis, production dynamics of the ultra-low-permeability oil layer are divided into two stages including the initial production stage and the stability stage according to fracturing test mining curve features; the mud invasion degree of the ultra-low-permeability oil layer is determined according to differences of the initial fluid throughput amount of strata, and properties of the oil layer arejudged according to the fluid throughput amount of the strata and the mud invasion depth in combination with quantification of the fracturing curve features; a relationship chart between the resistivity and mud invasion depth of the oil layer is compiled to quantitatively evaluate the mud invasion influence. The invasion volume and invasion radius of a mud filtrate in the ultra-low-permeability oil layer can be determined simply, accurately and quantitatively, correspondingly the mud invasion influence and causes of the low-resistance oil layer are analyzed, the properties of the oil layer are identified and evaluated, and the causes of the low-resistance oil layer are determined.

An optical analyzer performing analysis excellent in spatial resolution and in invasion depth is provided. The analyzer includes a diagnostic light source section including a seed light source which outputs seed light, and a silica optical fiber to which seed light is input and which generates diagnostic light having a HE11 mode field pattern utilizing a nonlinear optical phenomenon, an irradiation optical system converging the diagnostic light and irradiating a measurement subject with the diagnostic light, an acquisition optical system acquiring object light generated at the measurement subject, a spectrum measurement section receiving the object light and measuring a frequency spectrum of the object light, a storage section storing information of a frequency spectrum of a known substance, and an arithmetic section calculating a correspondence between the frequency spectrum of the object light and the frequency spectrum of the known substance, and analyzing the measurement subject based on the calculation result.

The invention provides an anti-collapse plugging agent, and a preparation method and application thereof. According to the preparation method of the anti-collapse plugging agent, an inorganic hard monomer is added into a water phase of polymer microspheres synthesized by reversed-phase suspension polymerization, thereby preparing the polymer-microsphere-containing anti-collapse plugging agent. The anti-collapse plugging agent provided by the invention can be directly added into a water-base drilling fluid. The particle size of the polymer microspheres in the anti-collapse plugging agent is 2-300 mu m. The anti-collapse plugging agent provided by the invention has favorable temperature resistance and favorable anti-collapse effect, and can effectively inhibit the hydrous disintegration of clay. The anti-collapse plugging agent has favorable elasticity, can effectively lower the API filter loss and sand bed invasion depth of the drilling fluid, and has favorable plugging effects on pore throats with different shapes and sizes.

The invention discloses a method for determining the invasion depth of slurry filtrate. The method comprises the following steps: acquiring a time and conductivity curve graph in a sampling process ofa formation fluid pump; determining oil gas breakthrough time information and pure oil gas stabilization time information of the formation fluid based on the time and conductivity curve graph; establishing a formation fluid volume model according to the oil gas breakthrough time information, the pure oil gas stabilization time information and the known set pumping speed; and determining the invasion depth of the mud filtrate based on the formation fluid volume model.

The invention discloses a measuring device for determining the invasion depth of mud filtrate. The measuring device comprises a simulation wellbore, an invasion chamber and a data collection device, wherein a window is formed in the simulation wellbore; a stratum module is arranged in the invasion chamber; the invasion chamber is tightly connected with the window of the simulation wellbore; the invasion chamber is provided with an electrode; the outlet end of the invasion chamber is provided with a leak-off flow measuring device; the data collection device comprises a data collection controller and a computer; the electrode is connected with the data collection controller; and the data collection controller is connected with the computer. The measuring device has the characteristics of being vivid and visual in simulation degree, high in accuracy, simple to operate and the like; the device is suitable for measurement of mud invasion experiments of the stratum module under the conditions of fresh water mud and salt water mud and research of influences on an electric logging response of a reservoir caused by mud invasion, provides experimental data for building a mud invasion correction model of the logging response of the reservoir, and is of great significance on improvement of domestic mud invasion research capability.

The invention discloses application of EIF5A2 to preparation of an esophageal squamous cell carcinoma prognosis reagent. Real-time quantitative PCR (Polymerase Chain Reaction) detection data shows that expression of the EIF5A2 in esophageal squamous cell carcinoma tissues is obviously higher than that in corresponding non-tumor tissues. An immunohistochemical data analysis result shows that expression of the EIF5A2 is positively correlated to lymphatic metastasis, the tumor invasion depth and neoplasm staging. Kaplan-Meier analysis shows that a patient overexpressed by the EIF5A2 has poor overall survival (p is less than 0.001). Multivariate analysis also proves that the EIF5A2 is an independent prognostic factor. The EIF5A2 possibly takes important effects in invasion and metastasis of esophageal squamous cell carcinoma. Further experimental data proves that overexpression of the EIF5A2 can be caused by gene amplification and oxygen deprivation; the EIF5A2 can be combined into a promoter region of HIF1a to up-regulate expression of the HIF1a; and the EIF5A2 can induce epithelial-mesenchymal transition conversion and promote angiopoiesis of the esophageal squamous cell carcinoma so as to promote invasion and metastasis of the esophageal squamous cell carcinoma. Knockout of the EIF5A2 can obviously inhibit tumor metastasis and the silent EIF5A2 is expected to be a potential target of esophageal squamous cell carcinoma treatment.

The invention discloses a gas reservoir density calculation method based on density, neutron and nuclear magnetic resonance logging, comprising the specific steps of S1, acquiring three logging curves, to be specific, applying neutron logging-while-drilling, density logging and nuclear magnetic resonance logging to the same best measurement, and alternatively, applying cable neutron logging, density logging and nuclear magnetic resonance logging to the same measurement, thereby ensuring that an object reservoir under measurement gains time unification and invasion depth approximation; S2, applying an equation that is shown in the description to density logging measurement information; S3, applying an equation that is shown in the description to neutron logging measurement information; S4,applying an equation that is shown in the description to nuclear magnetic resonance logging measurement information; S5, through simultaneous equations of neutron, density and nuclear magnetic resonance, calculating three unknown numbers: true total porosity phi of the gas reservoir, gas saturation (1-S<xo>) and gas reservoir density rho h; S6, outputting calculation results. The method herein helps provide logging evaluation for gas reservoirs, provides precise reliable total porosity, flushed zone gas saturation and gas density, provides improved geological evaluation accuracy, has accuratemodel calculation results and is widely applicable.

The invention discloses a simulation experiment device for measuring a stratum invasion depth of a channeling sealing agent. The simulation experiment device comprises a hollow cylindrical sleeve, a kettle body which is arranged at the top of the sleeve and is fixedly connected with the sleeve, a base which is arranged at the bottom of the sleeve and is used for supporting and fixing the sleeve, a sand-filled pipe which is arranged in the sleeve along the axial direction of the sleeve, a perforation channel which is arranged between the kettle body and the sand-filled pipe and is used for communicating the kettle body with the sand-filled pipe, a compression module which is arranged in the sand-filled pipe and can slide up and down along the axial direction of the sand-filled pipe, and a jack which is arranged on the base and is used for driving the compression module to slide axially. According to the simulation experiment device, a booster pump is used for boosting inside the kettle body to simulate a process for injecting the channeling sealing agent on site under different pressure and displacement conditions so as to research the influence of the injection pressure and the displacement on the invasion depth of the channeling sealing agent; a test result is high in accuracy. The invention further discloses a measurement method of the simulation experiment device.

The invention relates to a method for predicting gate opening type density flow separation depth in a linear stratified water environment. The method includes the following steps that firstly, related topographic data and water density data of a target research area are obtained; secondly, parameters are determined, wherein the parameters include environment water buoyancy frequency, the relative stratification degree of density flow inflow portion environment water, inflow speed of density flow and inflow unit discharge flow of density flow; thirdly, the data obtained in the first step and the data obtained in the second step are substituted into a gate opening type density flow separation depth prediction model (please see the model in the description), and the prediction value of the gate opening type density flow separation depth in the linear stratified water environment is calculated. The method for predicting the gate opening type density flow separation depth in the linear stratified water environment is simple in mode, accurate, efficient and capable of being used for quickly judging the invasion depth of density flow.

A system for determining an invasion depth of an invaded zone surrounding a borehole while the borehole is being drilled includes a sensor configured to be disposed in a mud cake formed on a wall of the borehole and configured to measure a property of the mud cake and a computing device configured to receive a measurement from the sensor and determine the invasion depth based on the measurement.

The invention relates to a novel structural air fryer. The novel structural air fryer comprises a main body and a central controller which is arranged above the main body; the main body is provided with accommodating space; a grid-shaped rotational roasting cage is arranged inside the accommodating space; a heating device which can supply heat energy for the roasting cage is arranged on the main body. The novel structural air fryer is characterized in that an adjustable deep fryer is arranged under the roasting cage inside the accommodating space. According to the novel structural air fryer, various functions of dry frying, deep frying or less oil frying are achieved by adjusting deep fryer oil immersing depth of food in the roasting cage through the method of adjusting the height of the deep fryer due to the adjustable deep fryer. When the novel structural air fryer is used, moderate oil is injected into the deep fryer, relative height between the deep fryer and the baking cage is adjusted according to requirements such as frying time and taste to achieve adjustment of invasion depth of food in the deep fryer. Accordingly, the novel structural air fryer can be applied to multifunctional air fryer products.