14 results about "Rift" patented technology

The invention discloses a quantitative prediction method and device for the quantity of oil and gas resources to be discovered in a rift valley basin, and the method comprises the steps: taking a rift valley basin oil and gas reservoir in a mature exploration stage as a sample oil and gas reservoir, and determining a target reservoir forming combination of the discovery workload and the main oil and gas contribution in the sample oil and gas reservoir; constructing a sample oil and gas reservoir reserve change model by taking the target reservoir-forming combination as an object unit; and predicting the to-be-discovered resource quantity of the to-be-predicted rift valley basin oil and gas reservoir based on the sample oil and gas reservoir reserve change model. According to the method, the rift valley basin in a mature exploration stage is taken as a data basis, the reserve prediction method which is suitable for the rift valley basin type and takes the reservoir forming combination as an object unit is provided, quantitative formula making and application operation flow refining are carried out, and the method provides a guidance basis for rift valley basin exploration workload deployment design and to-be-discovered resource potential prediction.

The invention provides a method and device for predicting the volume of hydrocarbon source rocks in a rift valley system low-exploration-degree basin, and relates to the technical field of oil and gas geology, and the method comprises the steps: selecting a basin with a high rift valley system exploration degree as a scale region according to the spatial-temporal evolution characteristics of the rift valley system and the exploration degree of the basin, and determining an optimal construction condition; analogy is carried out on the dynamic background, the extension mechanism, the fault activity normal form and the structure type of the to-be-predicted basin and the scale area depression to obtain a class ratio K1, and the analogy premise of the to-be-predicted basin and the scale area is determined; performing analogy on the maximum activity rate of the boundary fault of the to-be-predicted basin and the scale area and the maximum thickness of the hydrocarbon source rock stratum system to obtain class ratios K2 and K3; and obtaining an analogy value K according to a formula # imgabs0 #, and calculating the volume of the to-be-predicted basin hydrocarbon source rock through the analogy value K. According to the technical scheme, prediction of the volume of the hydrocarbon source rock in the low-exploration-degree basin of the rift valley system is achieved, and the exploration cost is reduced.

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 belongs to the technical field of petroleum exploration, and discloses a method for identifying a thrust anticline trap of a buried hill in a rift basin, comprising: obtaining a three-dimensional seismic data volume of the rift basin containing stratum horizon data; selecting a seismic profile in a direction substantially perpendicular to the extension direction of the rift basin to identify a thrust fault; selecting a seismic profile and a seismic isochronous slice of the upthrown side of the thrust fault to identify a thrust anticline structure of the buried hill; and judging whether the thrust anticline structure of the buried hill develops a weathering crust reservoir and an overlying layer simultaneously, and if so, identifying the thrust anticline trap of the buried hill in the rift basin as effective. In the present application, the selection of the seismic profile in the direction substantially perpendicular to the extension direction of the rift basin can improve the success rate of identifying the concealed thrust fault in the buried hill. The method of combining the seismic profile and the seismic isochronous slice to identify the thrust anticline structure can improve the identification accuracy of the thrust anticline of the buried hill.

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 present application relates to the technical field of geology physical simulation, and provides an experimental device and method for simulating the formation mechanism of the Deyang Anyue rift trough, the experimental device for simulating the formation mechanism of the Deyang Anyue rift trough comprising an experimental platform, a baffle assembly, a bearing, a lifting mechanism, a linear transmission mechanism and a controller, the first driving device being controlled by the controller to synchronously drive the first baffle and drive the two hard plastic plates connected to the two sides of the extensible plate to move reversely, so as to pull the extensible plate to make horizontal extension movement, simulating the tension process of the stratum; the bearing driving the extensible plate and the overlying quartz sand uplift by driving the lifting mechanism, simulating the stratum uplift caused by the uplift of the mantle plume, simulating the 'activation' effect of the pre-existing basement fracture by using the hard plastic plate, and then based on the development form of the Deyang Anyue rift trough, the distribution of the overlying stratum and the characteristics of the fracture system, using the first lateral extension and then longitudinal strike-slip mode, the formation of the Deyang Anyue rift trough is more scientifically and intuitively simulated.

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.

The application discloses a kind of prediction methods of continental rift basin source-sink system depositional system, comprising: based on regional tectonic background, restore the paleogeomorphic distribution form of source-sink system source area and sink area;On the basis of sequence stratigraphic framework establishment, the source-sink unit in study area is divided;Based on the paleogeomorphic distribution form of source area and drilling core test data, the effective supply volume of source area, lithology density and average height are obtained, and the supply potential of source area is calculated;Based on the elevation data of source area, the distribution range and characteristics of ancient drainage system are described;The river network density of ancient drainage system is calculated;The width-depth ratio and cross-sectional area of gully are obtained;The optimization index of different source-sink units is calculated;The volume of known depositional system sediments is obtained;The coupling relationship between the optimization index of different source-sink units and the volume of corresponding known depositional system sediments is established;According to the obtained coupling relationship, the unknown depositional system in the source-sink system of study area is predicted.