9 results about "Rift" patented technology

The invention relates to the technical field of oil and gas exploration, in particular to a method for quantitatively evaluating the vertical oil and gas transmission capacity of fractured basin fractures, and aims to calculate channel source fracture transmission capacity quantitative evaluation parameters by identifying the distribution condition of effective channel source fractures in a fractured basin containing oil and gas. And performing quantitative evaluation on the vertical conduction capability of the trench source fracture by combining the fracture activity rate, the inclination angle, the fracture zone area, the effective fracture-hydrocarbon contact area, the section positive pressure, the effective hydrocarbon supply amount of the hydrocarbon source rock and the oil gas discovery condition. According to the method, multi-factor comprehensive geological evaluation is considered, data acquisition is convenient, the applicability is wide, the reliability is high, and reliable theoretical support can be provided for favorable zone optimization in fractured basin oil-gas exploration.

The invention relates to an evaluation method of a broken basin volcanic rock reservoir, and belongs to the technical field of physical exploration. Determining the parameter value of the lower limit of the reservoir through the relationship between the pore throat radius distribution and the mercury injection displacement pressure; constructing a geologic function related to the porosity, the gas saturation and the permeability; and integrating the reservoir average pore throat radius, the comprehensive evaluation parameters, the porosity and the permeability, and establishing a reservoir comprehensive grading evaluation standard. Based on well drilling logging data and seismic data, a geological basis is provided for work such as evaluation, exploration and development deployment of a favorable area of the volcanic gas reservoir.

The present application relates to a method, device, medium and equipment for high-precision sequence division of a continental rift lake basin, comprising: determining a target well; obtaining a GR curve of the target well and preprocessing the GR curve to obtain a shale volume curve; performing multi-stage filtering on the shale volume curve; performing cross-point analysis and picking up sand-shale boundary based on trend data of the shale volume curve; discriminating sandstone cycle types based on sand-shale layering results; dividing cycle basic units for discrimination of mudstone segments, sandstone segments and sand body cycle types; calculating an A / S ratio according to cycle basic units; the A / S ratio is a ratio of a basic unit thickness to a sandstone thickness; and identifying key interfaces and system domain positions according to the A / S ratio. The present application can realize high-precision division of sand-shale layers, and quantitatively reflect stratigraphic stacking patterns according to A / S ratio variation characteristics, thereby completing high-precision sequence and system domain division.

The invention provides a fault basin sand body distribution prediction method and device based on fault activity quantitative characterization, equipment, a storage medium and a product, and relates to the technical field of sand body prediction, and the method comprises the steps: obtaining three-dimensional seismic data and logging data of a target region, and carrying out the structural interpretation of the three-dimensional seismic data, and obtaining the structural interpretation data; calculating a thickness difference grid between a fault hanging wall and a fault footwall of the target fault in the target interval based on the structural interpretation data; calculating a fault activity index of the target fault in a target interval deposition period based on the structural interpretation data; based on the structural interpretation data and the logging data, determining a containing space and a supply ratio of the target interval; and generating a sand body thickness distribution diagram of the target interval based on the thickness difference grid, the fault activity index and the containable space and supply ratio. According to the invention, a more accurate sand body distribution prediction result can be obtained.

The present disclosure provides a method and device for identifying gravity flow type of continental rift lake basin, and relates to the technical field of geological exploration. The method for identifying gravity flow type of continental rift lake basin comprises: obtaining three-dimensional seismic data, core data and logging data of a target area; the three-dimensional seismic data comprises seismic reflection structure and seismic slope; the core data comprises lithofacies characteristics, sedimentary structure, sedimentary sequence and particle size distribution characteristics; based on the three-dimensional seismic data, the core data and the logging data, as well as the characteristics of flood-type gravity flow and the characteristics of slumping-type gravity flow, the gravity flow type of the target area is determined; the gravity flow type is verified based on sedimentary process simulation, seismic inversion verification and reservoir microscopic verification; and in response to the verification passing, the gravity flow type is determined as the target gravity flow type of the target area. Thus, the defects of single parameter and insufficient verification in the traditional identification method are overcome, and the identification efficiency and accuracy of the gravity flow type are significantly improved.

The present application relates to a kind of rift basin present geothermal field prediction method.The method first obtains the mean of well point stable section geothermal gradient in study area, and according to stratigraphic compaction coefficient and other parameters, the study area is divided into multiple sub-regions;Subsequently, the preliminary prediction model between geothermal gradient and Moho depth, basement depth, stratigraphic thermal conductivity weighted average value is established in each sub-region;By identifying the residual of preliminary prediction model, the geothermal gradient high well site is systematically screened out, and then the quantitative analysis of the enhancement effect of deep fault on geothermal field is carried out: that is, based on three-dimensional seismic data, the temperature control influence range of each fault is determined, the distance of well site from fault is calculated, and the enhancement efficiency coefficient of fault is obtained by linear regression, and the preliminary model is corrected, to obtain the final prediction model;Finally, based on regional base map and the final model, high-precision geothermal gradient distribution map is generated by gridding calculation.

The present application relates to a kind of large-scale water guide fault heat accumulation effect evaluation method and system of fault basin, belong to geothermal resource development technical field, the large-scale water guide fault heat accumulation effect evaluation method of fault basin obtains the thermal physical data of rock sample of different rock strata units in fault basin karst geothermal region, constructs the geothermal geological model of fault basin karst geothermal region, constructs the heat conduction geothermal geological mathematical model and heat convection geothermal geological mathematical model considering large-scale water guide fault, based on the boundary condition and thermal physical parameter of set geothermal geological model, respectively to heat conduction geothermal geological mathematical model and heat convection geothermal geological mathematical model are simulated and solved, obtain the first geothermal gradient and second geothermal gradient of geothermal geological model;First heat flux value and second heat flux value of geothermal geological model are calculated, to evaluate large-scale water guide fault heat accumulation effect, improve the accuracy of heat accumulation effect intensity and spatial distribution law.

The invention relates to the field of petroleum geology in the petroleum exploration industry, in particular to a method and device for determining the form and stability of a rift valley basin substrate, computer equipment and a storage medium. Parameters influencing the form and stability of the rift valley basin substrate to be determined are obtained; performing a numerical simulation experiment on control variables of parameters through the established multi-layer mainland rift valley numerical model to obtain numerical simulation results of different time nodes; according to a quantitative relation between a numerical simulation result and a rift valley form, determining an effective parameter interval causing rift valley migration; and performing transverse comparison on the effective parameter intervals to obtain a control mode of the parameters for the substrate form and stability of the rift valley basin to be determined. According to the method, quantitative evaluation of the morphology and stability of the rift valley basin base and the main control factors of the rift valley basin base is achieved, rift valley basin structure zone division and oil and gas zone prediction are guided, and a foundation is laid for oil and gas distribution rule control.

The invention relates to a method for predicting a current ground temperature field of a broken basin. The method comprises the following steps: firstly, acquiring a ground temperature gradient mean value of a well point stable section in a research area, and dividing the research area into a plurality of sub-areas according to parameters such as a stratum compaction coefficient; then, establishing a preliminary prediction model between the ground temperature gradient and the weighted average value of the mourphy surface depth, the substrate depth and the stratum thermal conductivity in each sub-region; and systematically screening out a well location with a relatively high ground temperature gradient by identifying the residual error of the preliminary prediction model, and further quantitatively analyzing the enhancement effect of deep and large fractures on a ground temperature field, namely determining the temperature control influence range of each fracture based on three-dimensional seismic data, calculating the distance between the well location and the fracture, and obtaining the enhancement efficiency coefficient of the fracture through linear regression. Correcting the preliminary model to obtain a final prediction model; and finally, based on the regional basic map and the final model, performing gridding calculation and generating a high-precision ground temperature gradient distribution map.