96results about How to "Improve drilling success rate" patented technology

The invention relates to a drilling engineering technology in petroleum engineering, in particular to a method for monitoring the track of an actually drilled wellbore. The method comprises the following steps: acquisition of inclination survey data and naturalization treatment; determination of characteristic parameters of a wellbore track model; determination of a hole inclination equation and an azimuth equation; calculation of coordinate increment; calculation of surveying point coordinates; and so on. As for large-displacement wells containing catenary or parabola tracks and various directional wells and horizontal wells, the method can accurately monitor the coordinates of various surveying points, so as to make the monitoring result accord with the practice of the drilling engineering, thereby effectively improving the construction precision and the reliability of catenary drilling and parabola drilling.

The invention discloses a small sand body boundary identification method and a small sand body space quantitative description method. The small sand body boundary identification method comprises the following steps: summarizing the development rules and scale of a sand body according to the geological situation of a region; summarizing the seismic response characteristics of a reservoir and carrying out seismic profile identification and interpretation through seismic forward modeling; processing earthquake in a frequency division way, extracting seismic attributes of different frequency bands, and adopting known well data analysis to preferably select seismic attributes better corresponding to the reservoir and the sand body; and finely describing the sand body by comprehensively adopting the geological rules, sand body seismic response characteristics and frequency-division seismic attribute analysis. The small sand body space quantitative description method comprises the steps of drawing the boundary of a sand body and determining a favorable area of a reservoir by the above method, and quantitatively describing the spatial shape of the sand body through well logging constrained inversion. The boundary of a described small sand body is accurate and quick to describe, and the accuracy of reservoir predication can be improved.

The invention relates to a fault precise homing method in the oil physical exploration seismic data interpretation for improving the precision of a structural map. The course is as follows: the re-sampling of an original fault is carried out at equal intervals along the fault line, and break points of a demarcation point of the upper and the lower disks of the fault are retained; the temporal gradients of the near layer location data points of the positions of all the break points of the fault on the X and the Y directions are calculated, the temporal gradients of the near layer location data points on the X and the Y directions are similarly equal to the temporal gradients of the break points; then the smoothing treatment is carried out, and the usual method is further adopted to carry out the homing calculation of the break points to obtain the positions of the break points after the homing. The fault precise homing method can improve the accuracy of the homing of the layer location data and overcome the deviation of a finished image caused by using a stack migration profile to be similarly equal to the position of the underground structural real fault during the original imaging process, thereby allowing the correction result of the whole space to be more accurate and more reasonable, and truly reflecting the shape of the underground structure.

The invention relates to an evaluation method for reservoir distribution of a supergene karst of a carbonatite. The method comprises the following steps that features of the supergene karst are identified, a logging response standard for the supergene karst structure is established, the cyclicity of the supergene karst structure is divided, growth differences of different karst cyclicity are compared, and distribution benefit for the karst reservoir is evaluated. On the basis of analysis on geological and logging data, the karst cyclicity caused by change of the reference surface of karst in the supergene karst generating process is considered, and the multi-cyclicity of the supergene karst is divided and compared according to the geology observation and logging discrimination; and the cyclicity of the supergene karst and the discovered karst reservoir are analyzed in a combined manner to determine the karst cyclicity and vertical growth segments benefit for growth of the karst reservoir, the planar distribution of the corresponding karst cyclicity is used to determine planar distribution benefit for the karst reservoir, the disadvantages in evaluating the karst reservoir via the supergene karst structure are overcome, evaluation for the karst reservoir satisfies the practical geological evolution history more, the evaluation result is more accurate, and the success rate of exploration is effectively improved.

The invention discloses a wheeler domain section sand body carving method based on a three-dimensional earthquake.The method comprises the following steps of determining a sequence top-bottom interface in combination with well shaking, calculating a seismic event inclination angle guiding body, tracking chronological strata according to the result whether inclination angle guiding mutates or not, and arranging chronological strata according to the sedimentation sequence to representing relative geological time, wherein parameters for tracking the chronological strata are of data drive, all the strata are continuous, and the maximum iteration is twice; breaking mutational sites, conducting iteration ten times, and establishing a three dimensional chronological stratum layer body; leveling all single layers of the layer body, and converting all the single layers into a Wheeler domain.Through Wheeler domain sections, the horizontal distribution scope of a sand body can be reflected, space carving is conducted on the sand body, through Wheeler domain seismic sections, horizontal distribution of the seismic attribute inside the sand body can be further reflected, and distribution characteristics of the sand body are researched.By means of the method, accuracy for identifying an alluvial fan sand body ad a fan-delta sand body can be improved, and the well drilling success rate is raised.

The invention relates to an analytic technique of seismic data quality. The invention has the following steps: firstly, selecting control point common shot gathers data, determining the maximum analytical frequency, selecting and analyzing frequency band according to the range of the effective reflected signal frequency in a target block, carrying out frequency wave filtering to each seismic channel of the data each cannon to obtain the frequency demultiplication result of each channel; adopting a formula (1) to make time domain median filter to all seismic channels of each frequency band in each cannon to obtain the statistical energy curve results of each frequency band, drawing the statistical energy curve results of each frequency band in the same cannon on an identical chart to obtain a time-frequency analysis chart. The invention can quantitatively reflect the data quality of data control point rapidly and correctly, avoid errors in human analysis and obtain reliable results.

The invention discloses a construction technique for preventing hole collapse of a bored cast-in-place pile. The construction technique for preventing the hole collapse of the bored cast-in-place pile is characterized in that the construction technique comprises the steps that (1) a pile casing is buried in a soil layer according to a pile position control line, and a drilling machine is started to drill after a mud circulating system and the drilling machine are well prepared; (2) normal drilling is carried out in the soil layer, and drilling is stopped and a drill bit is lifted when the drill bit is located in a soft soil layer and it is difficult to continue to drill downwards for the drilling machine; (3) the drilling machine is moved after drilling is stopped, concrete is poured into a drill hole rapidly till the surface of the concrete is higher than the set upper surface of the soft soil layer, and a rigid protective wall is formed after the concrete is solidified; (4) the drill bit is replaced with a rock drill bit; (5) the rock drill bit is replaced with the original excavating drill bit after the rock drill bit penetrates through the concrete located in the soft soil layer to enable rapid drilling to be carried out continuously till a hole is formed. The construction technique for preventing the hole collapse of the bored cast-in-place pile has the advantages that the problem that the lateral supporting force, in the soft soil layer, of a protective wall which is formed only by slurry is insufficient is solved, the hole collapse of soil layers with strong flow plasticity is prevented, and drilling success rate is improved.

Disclosed are an automatic focus identification method and a system for a Karst cave reservoir. According to the method, velocity replacement is performed based on a pre-stack time migration velocity model to obtain a plurality of replacement migration velocity volumes; pre-stack time migration is performed based on the plurality of replacement migration velocity volumes to obtain a plurality of post-stack seismic data volumes; a three dimensional cube window is selected based on a seismic response characteristic of the Karst cave reservoir; sparse statistical data of a seismic trace or sparse statistical data of a seismic trace attribute of each of the post-stack seismic data volumes in the three dimensional cube window are obtained respectively; and an optimized migration velocity and an optimized seismic trace are obtained through optimization determination.

The present invention provides a foreland basin alluvial fan fine description and prediction method. The method comprises a step of establishing a foreland basin alluvial fan geological model, a step of establishing the stratigraphic framework of an alluvial fan, a step of carrying out seismic facies and attribute inversion to delineate the plane distribution range of an alluvial fan, a step of carrying out three-dimensional electrical inversion to divide the phase band boundary of the alluvial fan of each period, carry out the fine identification of internal lithology and lithofacies, and determine the spatial distribution characteristics of the lithology and lithofacies, and a step of applying OpenDtect software to analyze the alluvial fan vertical evolution and establishing the deposition model of a study area alluvial fan. The method provided by the invention is mainly based on the sedimentology theory and the geological model foundation established by alluvial fan exposure investigation, logging, seismic, electrical method and other materials are fully utilized, the means of logging geological interpretation, seismic sequence analysis, seismic facies interpretation, attribute analysis and electrical method interpretation are integrated, and each phase band of the alluvial fan and the internal lithology and lithofacies spatial distribution characteristic are effectively identified.

The invention relates to a three-dimensional horizontal well borehole track design method in borehole track design in petroleum drilling. The three-dimensional horizontal well borehole track design method comprises the steps of pre-drilling design and while-drilling design of a drilling borehole track. According to the main technical method, the borehole track section composition is changed into six-section track composition namely the straight-increasing-stabilizing-torque-increasing (torque-increasing)-leveling, the direction is adjusted to the direction of a designed target point connectingline in advance by a certain well section or vertical depth, and the last whipstock section is designed to be a well section with a small build-up rate. And theincreasing and increasing (twisting) well sections in the six sections of tracks are calculated through an inclined plane arc method. Through the six-section well track design of straight-augmentation-stability-augmentation (torsion)-augmentation-leveling , the three-dimensional horizontal well track can be designed, and the well track designed through the method is beneficial to overcoming the uncertainty of the oil deposit vertical depth and the target-front build-up rate, the field well track control capacity is improved, and the smooth implementation of three-dimensional horizontal well construction is ensured.

The invention relates to a wavelet decomposition-based earthquake spectrum decomposition method, and includes the steps of: 1) inputting seismic data, and performing Hilbert conversion and spectral analysis on the seismic data; 2) presetting a Ricker wavelet function; 3) building a Ricker wavelet set according to a spectrum of the seismic data obtained by the Step 1) and the Ricker wavelet function in the Step 2); and 4) using the Ricker wavelet set to perform time-frequency decomposition on a seismic trace. The wavelet decomposition-based earthquake spectrum decomposition method has the beneficial effects that time-frequency resolution of earthquake spectrum decomposition can be greatly improved, and high-precision time-frequency domain seismic data can be obtained, thereby laying a solid foundation for improvement of seismic reservoir prediction; and the time-frequency resolution is improved by more than one time, playing an important role in using seismic frequency division information to perform reservoir prediction, and providing an important guarantee for oil companies and service companies to improve the success rate of exploration and development drilling.

The invention relates to a flat spot mapping method by using complex two dimensional seismic data which is processed by petroleum exploration. The process is that the data which requires the spatial correction is collected; the correction value of the initial space is obtained according to the level data; if the place with a complex structure before spatial correction is not located at the same wing part with the place after the spatial correction, a new spatial correction value is obtained. The speed variation parameter S of seismic migration is determined according to the inclination degree of the strata; the slope product of the projection points of the two points before and after spatial correction on the time level variation map along the migration direction is a positive number; When S is selected, the correction coefficient R parameter value of seismic migration speed of a certain underground point is determined. The invention greatly solves the excessive migration problem of the calculation result by using the original method; the whole spatial correction result is more accurate and reasonable, which can really reflect the shape of underground structure; the invention is favorable to comprehensive geological evaluation and oil and gas prediction.

The invention provides an oil-gas zone effective evaluation method and device. The oil-gas zone effective evaluation method comprises control factor parameter distribution of an interval of interest,wherein control factor parameters comprise stratigraphic dip, fault, effective unconformity with effective hydrocarbon generation range of hydrocarbon source rocks, reservoir thickness, cover thickness, oil generation abundance and gas generation abundance; obtaining evaluation parameter lower limit of an industrial value oil and gas reservoir, wherein evaluation parameters comprise reservoir thickness, porosity, cover thickness, oil generation abundance and gas generation abundance; obtaining a reservoir formation parameter value of each grid coordinate point according to the control factor parameter distribution; obtaining an evaluate parameter processing value of each grid coordinate point according to the evaluation parameters of the grid coordinate point, the evaluation parameter lower limit and the reservoir formation parameter value; and obtaining a zone evaluation value of the interval of interest according to the evaluation parameter processing value of each grid coordinate point. The invention provides the oil-gas zone effective evaluation method and device capable of improving evaluation coincidence rate.

An improved multi-target particle swarm optimization-based complicated well track optimization method comprises the steps of (1) setting a parameter of a multi-target particle swarm optimization MOPSO; (2) initializing population; (3) calculating a target function value; (4) updating a position and a speed of each generation of particle; (5) performing mutation operation on the particle; (6) calculating a target function value of each particle in the population; (7) updating the process of individual optimal algorithm from iteration beginning to a current optimal position; (8) sorting a non-domination set nd; (9) sequencing non-inferior solutions in external document of the MOPOS according to a target function value in a descending order; (11) deleting subsequent remaining individuals by an intercept method; (11) performing global optimization; and (12) obtaining an optimal solution set with algorithm optimization, wherein the actual measurement length of the well track and actual control torque reach optimization relatively. By the improved multi-target particle swarm optimization-based complicated well track optimization method, multi-target well track parameter optimization under an actual well drilling condition is achieved, the drilling success rate is improved, and a theoretical decision foundation is laid for reduction of drilling cost.

The invention discloses a prediction method for a glutenite oil reservoir, and the method comprises the steps: S1, analyzing the broken line activity of a glutenite research region and the longitudinal distribution sequence characteristics of a reservoir stratum of the research region through rock core observation and logging information, and recognizing a reservoir stratum on a tested oil or coring well; S2, determining the relationship among the reservoir lithology, the physical property, the electrical property and the oiliness of the reservoir and the electrical property identification standard of the reservoir, and identifying the drilled effective reservoir according to the electrical property identification standard of the reservoir; S3, defining lithology sensitivity, reservoir sensitivity and reservoir physical property sensitivity elastic parameters of the drilled glutenite body; S4, according to the elastic parameters, reversely deducing the distribution of the rock physicalparameters at the unknown position of the underground space through the pre-stack seismic reflection characteristics; and S5, predicting the distribution of the pore permeability parameters in spaceaccording to the distribution of the rock physical parameters so as to predict the effective reservoir distribution range. The effectiveness of glutenite oil reservoir prediction is achieved, and thereliability of the method is verified.

The invention discloses a lacustrine thin-layer dolostone reservoir stratum earthquake prediction method, which relates to the engineering field of petroleum industry and geology. The method comprises: obtaining the seismic data body of a target reservoir stratum and the rock slices of a single-well reservoir stratum; making a micro analysis of the rock slices; obtaining the distribution of the dolostone reservoir strata of the single-well reservoir stratum; through the well logging method, obtaining the well logging curves of the single-well reservoir stratum; obtaining the well logging curve of the single-well reservoir stratum sensitive to the dolostone reservoir stratum; based on the well logging curve of the single-well reservoir stratum sensitive to the dolostone reservoir strata, creating a well logging identification template; loading the well logging identification template into the seismic data body; and predicting the distribution of the dolostone reservoir strata of the target reservoir stratum. According to the method proposed by the embodiments of the invention, it is possible to predict the lacustrine thin-layer dolostone reservoir strata with its single stratum thickness ranging from 0.5 to 1.5 meters. This overcomes the restrictions of the dolostone earthquake resolution, is able to accurately perform the predictions on the earthquakes of the lacustrine thin-layer dolostone reservoir stratum and increases the success rate of drilling wells.

The invention provides a correcting method for a structure distortion phenomenon of seismic offset time profiles. The correcting method comprises the steps of building a construction model according to the geological information, establishing a layer speed model according to the speed information; building a construction + layer speed model, picking up a speed trap curve along a preset target layer; establishing a speed trap curve mode; analyzing the structure distortion phenomenon of the seismic offset time profiles; and using variable speed time depth conversion and /or pre-stack depth offset to correct the seismic offset time profiles with the structure distortion phenomenon. According to the method, the reasonability and accuracy of the structure morphology and the high point of seismic depth profiles can be effectively judged, the risk of drilling error can be reduced, and positive effects can be played in earthquake production and scientific research.

An oil and gas drilling machine remote interaction optimization control virtual simulation research practical training platform framework comprises a data layer, a supporting layer, a general servicelayer, a general service layer and a simulation layer. The simulation layer development content mainly comprises virtual simulation research practical training projects based on VR drilling environment equipment cognition and drilling machine operation, drilling machine control self-adaptive PID control and drilling machine advanced intelligent control simulation experiments, while-drilling complex well track multi-target optimization, VR proximity type well track display deviation rectification and the like. The virtual simulation network sharing platform integrates practical training and research and has good autonomy, interactivity and expandability.

The invention provides a well site deployment region determining method and device and a storage medium. The method comprises the steps that firstly, the oil source fracture condition of a to-be-developed oil reservoir is obtained; and then a well site deployment region of the to-be-developed oil reservoir is determined according to the oil source fracture condition of the to-be-developed oil reservoir and a preset well site deployment strategy, wherein the determined well site deployment region is a well site deployment high-production region of the to-be-developed oil reservoir. A well sitedeployment is accurately guided by adopting the preset well site deployment strategy, the well site deployment is carried out on the determined well site deployment region, the well drilling success rate can be increased, the single well benefit is guaranteed, the well site deployment accuracy is effectively improved, and the well site deployment risk is reduced.

The invention relates to the field of construction of nuclear power plants, in particular to a drilling positioning device for drilling medium and large equipment of a nuclear power plant. In order to improve the success rate of drilling with an electric pistol drill and lower the construction risk, the drilling positioning device is provided. A supporting structure comprises a supporting plate, a connecting plate and two clamping plates, wherein the clamping plates are connected with the supporting plate at the ends of the supporting plate to form a U-shaped structure, and the connecting ends of the clamping plates are connected with the connecting plate. A drill bit positioning hole is formed in a positioning template. A drill bit reserved hole is formed in a drilling positioning plate. When the drilling positioning device is used, the positioning template is fixed to the connecting plate, the drilling positioning plate is parallel to the positioning template and fixed to the positioning template, the central axis of the drill bit reserved hole and the central axis of the drill bit positioning hole are overlapped, and the drill bit positioning hole and the drilling position of a surface to be drilled are aligned. According to the drilling positioning device, the drilling position and the drilling direction of a drill bit are limited through the drill bit reserved hole and the drill bit positioning hole, the drilling quality is improved, and the drilling construction risk is lowered.