12 results about "Petrophysics" patented technology

The invention belongs to the field of rock physics, and discloses a natural gas hydrate artificial core and a preparation method and application thereof. The method comprises the following steps: uniformly mixing, stirring and rubbing dried kaolin mineral powder and a cementing agent, then putting the mixture into a mold, carrying out pressurization treatment to obtain a pressurized material, and crushing and screening the pressurized material to obtain pretreated kaolin particles; putting the pretreated kaolin particles into a rock core holder, pouring a solvent aqueous solution into the rock core holder until the solvent aqueous solution submerges the pretreated kaolin particles in the rock core holder, providing a low-temperature environment for the interior of the rock core holder, and preparing the natural gas hydrate artificial rock core. According to the present invention, the mineral matrix is improved based on the natural gas hydrate occurrence characteristics and the artificial rock core preparation technology, such that the artificial rock core conforming to the natural gas hydrate reservoir characteristics is prepared, and the similarity between the artificial rock core and the natural gas hydrate reservoir is improved.

The invention discloses a complex reservoir rock full-band sound wave velocity prediction and attenuation analysis method considering a pore structure and a multi-wave flow mechanism, and relates to the technical field of petrophysics and petroleum logging, the method comprises the following steps: constructing a multi-component digital rock based on X-ray CT and QEMSCAN, and extracting macropores; microcosmic pores are extracted through a high-resolution MAPS image, and a complex pore structure model is constructed; analyzing the static acoustic characteristics of the dry digital rock by adopting an elastic finite element method; on the basis, the influence of wave-induced flow in different scale spaces is considered, a new wave-induced flow mechanism of static flow-jet flow-Biot flow is provided, and a longitudinal wave and transverse wave speed prediction method of the rock with the complex pore structure is formed. According to the method, on the basis of digital rock, theoretical rock physics are fused, the rock sound wave velocity estimation method considering the pore structure and the microcosmic wave-induced flow mechanism is given, the frequency dispersion and attenuation characteristics of the rock sound wave velocity estimation method are determined, and a foundation is laid for subsequent reservoir logging evaluation.

This invention discloses a method for predicting the thickness of source rocks in the Yuertusu Formation of the Tarim Basin. The method involves: S1: Selecting typical wells to determine the lithology and physical properties of the source rocks and their surrounding rocks; S2: Establishing a geological model of source rocks with varying thickness; S3: Performing forward modeling to synthesize seismic profiles; S4: Constructing a quantitative relationship between forward modeling reflection amplitude and source rock thickness; S5: Extracting and normalizing the actual reflection amplitude; and S6: Calculating the source rock thickness. This invention, based on rock physics and combining well and seismic data, predicts the thickness of source rock layers based on the reflection amplitude at the bottom interface of the Yuertusu Formation, offering greater objectivity than conventional methods. This invention can provide thickness distribution information of the Yuertusu Formation source rocks for pre-salt oil and gas exploration in various target areas within the northern Tarim Platform, and also provides a methodological means to solve the problem of predicting thin source rocks in the Tarim Basin.

The invention relates to the technical field of tunnel engineering, geophysics, petrophysics and seismic exploration, and discloses a tunnel engineering expansive soil identification-based global indicator factor construction method, which comprises the following steps of: calculating a lithology indicator factor, a physical property indicator factor and a fluid indicator factor through a coordinate rotation formula; constructing a global indication factor based on the rock physical model; constructing a relationship used for constraining the global indication factor and the expansive soil content; initializing parameters of a multi-target mayfly naiad algorithm, and setting initial weights of a lithology indication factor, a physical property indication factor and a fluid indication factor; carrying out iteration by adopting a multi-target mayfly naiad algorithm, and dynamically updating the weights of the lithology indication factor, the physical property indication factor and the fluid indication factor; and extracting the mayfly naiad position of the middle part in the final Pareto set, and taking three weights in the mayfly naiad position as the optimal weights of the global indication factors. The method can provide support for accurate identification of tunnel engineering expansive soil, exploration and development of earth deep resources and the like.

The application relates to the field of oil and gas exploration and development and rock physics, and discloses a quantitative evaluation of the influence of dissolution on the elasticity of sedimentary rock. The method comprises the following steps: determining the mineral components of a carbonate rock sample of a target layer, the content of each mineral component, the first pore characteristics and the first elastic parameters; determining the dissolution environment parameters according to the sedimentary environment, the underground fluid condition and the burial history of the area where the carbonate rock sample is located, and performing dissolution simulation processing on the carbonate rock sample according to the dissolution environment parameters; re-determining the second pore characteristics and the second elastic parameters of the carbonate rock sample; establishing a quantitative evaluation model according to the mineral components, the content of each mineral component, the first pore characteristics, the first elastic parameters, the second pore characteristics and the second elastic parameters, and evaluating the influence of dissolution on the elasticity of the carbonate rock according to the quantitative evaluation model. The application helps to improve the accuracy of seismic reservoir prediction.

The present invention relates to the technical field of rock physics, and particularly to a method, device, storage medium and electronic device for constructing a rock physics model. The method includes: obtaining the density of a target rock; performing physical modeling on the target rock through an inclusion model to obtain a reference elastic modulus M0; performing physical modeling on the target rock through an uncemented sandstone model to obtain an elastic modulus M at a pressure of P0 P0 and an elastic modulus M at a pressure of P1 P1 ; based on the elastic modulus M P0 and the elastic modulus M P1 , obtaining a change in elastic modulus ΔM; based on the reference elastic modulus M0 and the change in elastic modulus ΔM, obtaining an elastic modulus M1 after a pressure change; based on the elastic modulus M1 and the density, obtaining a longitudinal wave velocity VP and a shear wave velocity VS. The influence of pressure change on the elastic modulus is considered when constructing the rock physics model, improving the accuracy and rationality of rock physics modeling.

The invention discloses a deep thermal storage geophysical exploration prediction method and system, and relates to the technical field of deep high-temperature geothermal reservoir exploration and development, and the method comprises the steps: building a deep thermal storage typical geology-geophysical model, carrying out the forward modeling of the deep thermal storage typical geology-geophysical model, and obtaining a deep thermal storage typical geology-geophysical model; establishing a deep heat storage medium rock physics and geophysical response incidence relation model; constructing a high-precision deep thermal storage geophysical exploration inversion geologic model, and performing inversion on the high-precision deep thermal storage geophysical exploration inversion geologic model; performing sensitivity analysis on the deep thermal storage geophysical response in the inversion result to obtain sensitive geophysical attribute data; and according to the sensitive geophysical attribute data, establishing a deep thermal storage geophysical exploration prediction identification index system. According to the method, the incidence relation between the geophysical response characteristics and the deep thermal reservoir distribution can be revealed, so that the deep thermal reservoir exploration risk is reduced.

The identification of prospective hydrocarbon deposits within a subterranean formation suitable for exploration and production activities may be achieved with methods and systems that analyze seismic amplitude anomalies and identify prospective hydrocarbon deposits based on said analysis. For example, the methods and systems may generate and / or use a collection of seismic forward models that relate to the geological factors and seismic imaging artifacts that impact (or otherwise generate) seismic amplitude anomalies. The seismic forward models may be derived based on rock physics and petrophysics principles while also considering seismic imaging artifacts.

The invention belongs to the field of petrophysics and geophysical exploration, and relates to a full-diameter bisection rock core nondestructive acoustic detection method and device based on laser ultrasound, electronic equipment and a computer readable storage medium. Comprising the following steps that 1, pulse laser is irradiated to a laser ultrasonic excitation point through a lens, an ultrasonic signal is excited, and the ultrasonic signal is transmitted to an ultrasonic receiving point; 2, receiving an ultrasonic signal of the ultrasonic receiving point position through an ultrasonic probe, and outputting an electric signal; 3, electric signals of different laser ultrasonic excitation point positions are collected and output to a processing module; and step 4, amplifying and filtering the electric signals of different laser ultrasonic excitation point positions to improve the signal-to-noise ratio, analyzing the signals after the signal-to-noise ratio is improved, and finally obtaining full-diameter bisection core information. According to the invention, core surface positioning ultrasonic excitation is realized by using laser, the problem of poor coupling of a core cambered surface and an ultrasonic probe is solved, and the detection efficiency and accuracy are improved.

The invention provides a coal sample temperature change resistivity testing device and a using method thereof, and relates to the technical field of petrophysics and experimental geophysics. The device comprises an insulation and heat preservation device used for providing an insulation environment and a heat preservation environment; the shaft type sample bin is arranged in the insulation heat preservation device and is used for containing a test coal sample column; the transmission mechanism is used for driving the shaft type sample bin to rotate; the resistivity tester is electrically coupled with the test coal sample column to measure the resistivity of the test coal sample column in real time; the temperature rising device is arranged in the insulation and heat preservation device and is thermally coupled with the test coal sample column to realize heating; the thermodetector is arranged in the insulation heat preservation device and is thermally coupled with the test coal sample column to measure the temperature in real time; and the chassis is used for fixing and supporting the resistivity tester, the heating device and the thermodetector. According to the method, the resistivity of the prepared standard coal sample can be accurately and continuously measured in a controllable temperature field, and key data is provided for researching the rule that the coal electrical property changes along with the temperature.

The present invention relates to a computer-implemented method for real-time resolution enhancement of image logs during oil well drilling. The method is an AI model that increases the resolution of image logs in real time, during drilling, which allows the identification of geological structures such as faults and fractures even before the drill bit is removed from the well. It allows a better choice of the ranges that will be isolated during well completion. The invention can be applied to all drilled wells, wherein it is chosen to acquire image logs during drilling and it was developed to increase the resolution of fractured ranges or those with the presence of faults, but can be used by petrophysicists to perform a rapid interpretation of all identifiable geological structures.

Drilling process methods and systems for drilling are described. The methods include performing a drilling operation through a downhole formation, the drilling operation generating drilling cuttings. A single drilling cuttings sample is obtained at a surface-based location. X-ray diffraction (XRD) and / or x-ray fluorescence (XRF) analysis are performed on the single drilling cuttings sample. Element information and mineral information of the single drilling cuttings sample is obtained from the XRF analysis regarding the downhole formation. From the obtained information, a determination of at least one rock petrophysics property of the downhole formation is made.