14results about How to "Improve heterogeneity" patented technology

The invention relates to the technical field of petroleum and natural gas exploration, in particular to an identification and division method for shale deposition cycles of different scales. Different-scale deposition cycles of shale may be controlled by different climate-driven mechanisms, and based on deposition rate evolution analysis, a depth domain is converted into a time domain by establishing a time scale; the method can compare the correspondence of dominant spectrum peaks in actual data with an eccentricity rate period, a slope period, an age difference period, a solar activity period and an El Nino-Southern oscillation period, breaks through the limitation that only single-scale shale deposition cycle analysis is focused in the prior art, and is based on multiple analysis and test means. The shale deposition cycle identification and division method from the ten-meter level to the meter level to the centimeter level to the millimeter level to the micron level is established, the precision of shale reservoir transverse comparison and small layer division is improved, and guidance can be provided for positioning of shale rich in organic matter.

The invention belongs to the technical field of oil development, and particularly relates to a fracture-vuggy carbonate reservoir gas-driven reserve calculation method, which comprises the following specific steps of: obtaining an influence factor correction coefficient of a gravitational differentiation influence factor through a numerical simulation experiment; calculating the obtained gas drive reserve before correction of the actual oil reservoir; and correcting the pre-correction gas-driven reserves of the actual oil reservoir by using the gravitational differentiation influence factor correction coefficient to obtain the corrected gas-driven reserves and the corrected gas-driven degree of the actual oil reservoir. According to actual parameters of the reservoir and injection-production dynamic data simulation, a fine conceptual model is constructed to accurately represent reservoir and fluid characteristics, the influence of gravitational differentiation influence factors on reserve calculation is considered, and by introducing a correction coefficient, a gas-driven reserve calculation result better fits the actual condition of the fractured-vuggy carbonate reservoir, and the reservoir and fluid characteristics are accurately represented. And reliable basis is provided for oil reservoir development.

The invention provides a seabed fan description method and system based on general spectral decomposition and multi-attribute fusion, and belongs to the field of petroleum and natural gas exploration and development. Comprising the steps that firstly, a target horizon and seabed fan development top and bottom interfaces are determined, a three-dimensional age stratigraphic framework is established with the top and bottom interfaces as constraints, and three-dimensional automatic tracking is conducted on an internal stratum of the three-dimensional age stratigraphic framework; performing correlation calculation on the seismic original data to obtain a main frequency value, and performing frequency division processing on the main frequency value by adopting a wavelet frequency division technology to obtain a series of single-frequency-band frequency division data volumes; and utilizing the stratum subjected to three-dimensional automatic tracking and identification to extract a horizon stratum slice of a sensitive attribute body from the frequency division data body, and finally fusing and displaying results to describe a seabed sector boundary. According to the method, the precision of boundary description is improved through spectral decomposition and multi-attribute fusion, and meanwhile, when the stratum interface is tracked, a method of combining automatic tracking and manual intervention is adopted, so that the interpretation workload is reduced, and the interface tracking accuracy is ensured.

The invention discloses a method for improving the fracturing crossing effect and the far-well end seam height, which comprises the following steps: determining a crossing position index according to a horizontal well track index, a reservoir minimum horizontal ground stress size index, a reservoir fracture toughness value index and a reservoir filtration coefficient index, selecting a crossing fracturing position, and segmenting to obtain a segmentation result; perforation, radial well guide reaming, fracturing and crossing of a reservoir where a horizontal well hole track is located and fracturing of a penetrated reservoir are carried out on the first crossing fracturing section; a multi-particle-size temporary plugging agent is added, the temporary plugging agent is pumped with medium-high displacement and high-viscosity fracturing fluid, normal-viscosity fracturing fluid is continuously injected in a high-displacement and step mode, and a propping agent is added in a step mode till a preset fracture height is reached; and a packing bridge plug is pumped to the position of the previous cross-layer fracturing section for the remaining cross-layer fracturing sections, setting is conducted, and cross-layer fracturing and pumping operation is repeated till cross-layer fracturing of all the sections is completed. The fracturing volume scale and the far-end crack height of the thin interbed horizontal well can be greatly improved.

This invention discloses a road safety analysis method and system for eliminating heterogeneity in traffic accident samples, relating to the field of road safety technology. Specifically, firstly, accidents are clustered according to their occurrence characteristics, forming groups with different attribute characteristics. Then, based on the safety influencing factors of the accidents, traffic safety models are performed on different groups. A safety analysis model is applied to obtain the influencing factors of traffic road safety in the affected area, and a safety evaluation of the area is conducted. Through the technical solution of this invention, a precise, comprehensive, objective, and truthful road safety evaluation method that reflects the impact data is provided, with a wider range of applications. In particular, clustering based on accident characteristics can amplify the heterogeneity between accident samples, better characterizing the impact of the same influencing factors on different accident groups.

The invention relates to a diene gel chemical blocking and channeling sealing agent. The problems that the plugging effect is poor and well cementation accidents are easily caused after an existing superfine cement system is solidified in large pore channel or crack plugging are mainly solved. The adhesive is characterized by comprising the following components in parts by mass: 8-10 parts of acrylamide; 1 to 3 parts of N, N-dimethylacrylamide; 5-6 parts of superfine silicate; 0.1 to 0.5 part of a dissolution promoter; 0.5 to 2.0 parts of a cross-linking agent; 0.1 to 0.3 part of an initiator; 0.1 to 0.2 part of a reinforcing agent and 78 to 85.2 parts of water; the preparation method comprises the following steps: sequentially adding the acrylamide, the N, N-dimethylacrylamide and the dissolution promoter into quantitative clear water according to the formula proportion of the agent, stirring, adding the cross-linking agent and the initiator, continuously stirring, adding the superfine silicate and the enhancer, and stirring and dissolving to obtain uniform liquid. The blocking and channeling sealing agent can improve the field working efficiency, the blocking effect is good after solidification, and well cementation accidents are not prone to being caused.

The invention relates to the technical field of oil and gas field development, in particular to a fracture-vuggy carbonate reservoir well trajectory design method based on seismic response characteristics, which comprises the following steps: selecting a target area; judging the morphological characteristics of the seismic response and the combination mode of various seismic responses; establishing different well spacing modes according to the seismic response morphological characteristics and the combination mode; and according to different well spacing modes, corresponding well trajectory design methods are established. By means of the well trajectory design method, the problem that the drilling success rate of the fracture-vug type carbonate reservoir is low can be effectively solved.

The embodiment of the invention provides a method, device and equipment for determining surface wettability of a single mineral and a storage medium. The method comprises the following steps: respectively establishing a water molecule model, a crude oil component model and a pore-containing mineral model; respectively loading water molecules formed by the water molecule model and crude oil components formed by the crude oil component model into pores of the mineral model; optimizing the system model; performing molecular dynamics simulation on the optimized system model to obtain a mineral model with pores containing water molecules and crude oil components; respectively calculating the interaction energy of the mineral and water and the interaction energy of the mineral and crude oil components; and determining the oil-water wettability of the surface of the mineral according to the interaction energy of the mineral and the water and the interaction energy of the mineral and the crude oil component. In the embodiment of the invention, a measurement environment close to geological conditions can be created, corresponding experimental models are established for crude oil components and mineral components, and the characterization of the heterogeneity of the wettability of the reservoir is facilitated.

The invention discloses a logging curve standardization method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring a well logging curve and data of a target layer section drilling well in a research area; according to the data and the logging curve, the carbonate rock compact layer of the target layer section is identified, and the compact layer is determined; taking multiple sets of compact layers of the single well as standard layers, determining a frequency distribution histogram of the standard layers, and determining curve characteristic values of the standard layers based on the frequency distribution histogram; averaging the curve characteristic values to obtain a standard value of the standard layer; and according to the standard value, standardizing the logging curves of all wells by adopting a translation method to obtain a target logging curve. According to the technical scheme, fine standardization processing can be carried out on stratums which are high in heterogeneity and free of stable and continuous distribution standard stratums, the high-quality logging curve meeting the reservoir inversion requirement is obtained, the precision of multi-well logging curve reservoir prediction is improved, and great significance is achieved on reservoir evaluation of heterogeneity stratums.

The invention discloses a carbonate rock two-phase acidification numerical simulation method based on a discrete fracture model. The method comprises the following steps: S1, constructing a carbonate rock two-phase acidification numerical simulation physical model based on an embedded discrete fracture model; s2, dividing a matrix grid and a fracture grid, giving physical parameters of a matrix, a natural fracture and an acid solution, and loading the physical parameters into a computational domain grid; s3, constructing a two-phase seepage model, an acid liquid chemical model and a saturation model in a reservoir matrix and a crack based on the EDFM; s4, solving a saturation model by adopting a Newton-Raphson iterative algorithm, solving an acid liquid chemical model by adopting an operator splitting method, and updating physical property parameters such as porosity and permeability according to a calculation result; s5, judging whether the wormhole of the current time step breaks through or not: if not, repeating the steps S3-S5, and judging whether the wormhole of the next time step breaks through or not; if yes, a carbonate rock two-phase acidification numerical simulation result based on the embedded discrete fracture model is obtained.

The invention provides a natural gas hydrate depressurization exploitation sand control screen pipe which sequentially comprises an unobstructed protective sleeve, a buffer layer, a control layer, a first supporting layer, a second supporting layer and a base pipe from outside to inside, and the unobstructed protective sleeve, the buffer layer, the control layer, the first supporting layer, the second supporting layer and the base pipe are all tubular. The buffer layer, the control layer, the first supporting layer and the second supporting layer are filled with annular low-density microspheres to form a filtering assembly of the sand control screen pipe for depressurization exploitation of the natural gas hydrate, the particle sizes are configured according to the sequence of medium-small-large-large-large, and fluid sequentially penetrates through the filtering assembly in a seepage mode in the radial direction. According to the sand control screen pipe for depressurization exploitation of the natural gas hydrate, the problems that the continuous pilot production period is short, the daily average gas production rate is small and a pilot production process scheme of'small-step jogging 'is not adopted for the sand control problem in the current pilot production of the natural gas hydrate are solved, and an implementation scheme of'thick and thin prevention', long-period stable pilot production and great improvement of the daily average gas production rate is provided.

The present invention provides a mix design method suitable for mixed recycled coarse aggregate concrete, belonging to the field of recycled concrete. The main components of coarse aggregate used in mixed recycled coarse aggregate concrete are natural coarse aggregate, recycled concrete coarse aggregate, and recycled broken brick coarse aggregate. Ordinary concrete mix design methods are no longer applicable to mixed recycled coarse aggregate concrete. The design method first adjusts the mortar density to minimize the density difference between the mortar density and the density of each component of the coarse aggregate, thereby reducing the heterogeneity of the coarse aggregate distribution in the hardened concrete; then, the equal volume mortar replacement method and the minimum slurry theory are combined to calculate the amount of water, cement, coarse and fine aggregates. The equal volume mortar replacement method ensures that the total content of new and old mortars in the mixed recycled coarse aggregate concrete is equal to the mortar content in ordinary concrete. Combined with the minimum slurry theory, it ensures that the cement slurry content in the mixed recycled coarse aggregate concrete can reach the minimum slurry content required to meet the concrete performance.

Provided are an anti-human B7-H3 monoclonal antibody and an application thereof. By using a recombinant human B7-H3 extracellular region as an immunogen, a murine anti-human B7-H3 monoclonal antibody can be prepared by means of a hybridoma technology, and a murine anti-human B7-H3 antibody can bind to various domains of the B7-H3 extracellular region. A human-mouse chimeric antibody constructed on the basis of a murine antibody can specifically bind to B7-H3 of a cell surface. A humanized antibody prepared by means of CDRs transplantation and CDRs region mutation retains the ability to specifically bind to the human B7-H3 extracellular region and cell membrane surface B7-H3, and can be mediated for internalization by the cell membrane surface B7-H3.

The invention relates to the technical field of induced polarization detection, and discloses a multi-channel induced polarization system for geological exploration, which comprises a multi-channel acquisition module and an intelligent detection module. According to the multichannel induced polarization system for geological exploration, power supply data and current data at all time points are acquired through the multichannel acquisition module and are classified to form a data set, the intelligent detection module analyzes apparent resistivity and polarizability between an electric field and current, conductivity and charge accumulation capability of an underground medium are visually reflected, and the accuracy and the reliability of the system are improved. A monitoring period with a fixed time length is set, the change trend of apparent resistivity and polarizability is analyzed, a fluctuation index and a stability coefficient are generated, the electrical fluctuation degree and stability of the underground rock stratum are quantitatively evaluated, the multi-channel parallel detection precision is high, the intelligent detection module sets a resistance threshold value, a polarization threshold value, a fluctuation threshold value and a stability threshold value in a fixed range, and the detection accuracy is high. The method is used for judging the water saturation, mineralization components and heterogeneity of underground rock strata and outputting corresponding judgment results, and intelligent evaluation and exploration efficiency is high.