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118 results about "Geosteering" patented technology
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Geosteering is the optimal placement of a wellbore based on the results of realtime downhole geological and geophysical logging measurements rather than three-dimensional targets in space. The objective is usually to keep a directional wellbore within a hydrocarbon pay zone defined in terms of its resistivity, density or even biostratigraphy. In mature areas, geosteering may be used to keep a wellbore in a particular section of a reservoir to minimize gas or water breakthrough and maximize economic production from the well. In the process of drilling a borehole, geosteering is the act of adjusting the borehole position (inclination and azimuth angles) on the fly to reach one or more geological targets. These changes are based on geological information gathered while drilling. Originally only a projected target would be aimed for with crude directional tools. Now the advent of rotary steerable tools and an ever-increasing arsenal of geophysical tools enables well placement with ever-increasing accuracy. Typically a basic tool configuration will have directional and inclination sensors, along with a gamma ray tool. Other options are neutron density, look ahead seismic, downhole pressure readings et al. Due to the vast volume of data generated, especially by imaging tools, the data transmitted to surface is a carefully selected fraction of what is available. Data is collected in memory for a data dump when back on surface with the tool.
Multi-sensor dynamic calibration method in rotary geosteering drilling
The invention provides a multi-sensor dynamic calibration method in rotary geosteering drilling, and relates to the technical field of petroleum engineering and drilling, and the method comprises the following steps: collecting original sensing data in real time through a multi-source sensor array deployed on a rotary geosteering drilling tool, wavelet packet decomposition is combined with an improved sliding window algorithm to carry out online denoising processing on original data, and a three-dimensional feature matrix containing environmental interference factors is established; and based on the three-dimensional feature matrix, constructing a dynamic calibration model based on depth time sequence association, respectively processing sensor body feature flow and environment interference feature flow by using a dual-channel LSTM network, performing dynamic weight distribution and fusion on dual-channel features by means of a gating attention mechanism, and outputting a dynamic deviation compensation coefficient of each sensor. The parameter set is generated and reconstructed through the three-dimensional feature matrix, the two-channel network and cooperative calibration, the drilling efficiency and precision are improved, errors are reduced, and intelligent development is promoted.
Owner:HEILONGJIANG GETAI TECH DEV CO LTD
Well-seismic integrated horizontal well geosteering risk evaluation method
The invention relates to the technical field of unconventional oil-gas exploration, and discloses a well-seismic integrated horizontal well geosteering risk evaluation method, which comprises the following steps: S1, acquiring three-dimensional seismic data, measurement while drilling data and geological logging data through a well-seismic integrated data acquisition platform; s2, constructing a horizontal well geosteering dynamic model based on multi-source heterogeneous data, and integrating a seismic inversion result and real-time drilling parameters; by establishing a well-seismic data dynamic fusion mechanism and a multi-source risk quantification model, the problem of space-time dislocation of seismic inversion and measurement-while-drilling data is solved, the recognition precision of a fault boundary, a lithologic interface and a pressure abnormal zone is ensured to be matched with drilling position changes in real time, risk misjudgment caused by model updating lag in a traditional method is eliminated, and the accuracy of the method is improved. The accuracy and timeliness of geosteering decision making of the complex structure area are improved; by monitoring well track deviation and geological model prediction deviation in real time, the risks of well wall instability and target deviation are avoided, and the operation safety of the horizontal well in the full life cycle is guaranteed.
Owner:ZHANJIANG RUIFAN PETROLEUM TECHNOLOGY CO LTD
Resistivity inversion interpretation by ai assistant during geosteering job
Some implementations include a system configured for real-time well path optimization of a wellbore being drilled into a subsurface formation, the system comprising: a downhole tool including a resistivity sensor; a drilling assembly coupled to a drill bit, the drilling assembly including the downhole tool; and a learning machine configured to, compare an input image of a resistivity inversion against an archive of historical data; generate, based on the comparison, a real-time well path suggestion; and output the real-time well path suggestion to a user interface.
Owner:HALLIBURTON ENERGY SERVICES INC
Geosteering control framework
A method can include rendering a graphical user interface to a display; receiving data; responsive to determining boundary locations for formations in the subsurface environment using the data, automatically rendering the boundary locations in the graphical user interface; responsive to determining extended boundary locations in the subsurface environment for a region beyond an end of the borehole using the boundary locations, automatically rendering the extended boundary locations in the graphical user interface; responsive to determining a target location in the region using the extended boundary locations, automatically rendering the target location in the graphical user interface; and, responsive to generation of a trajectory from an end of the borehole location to the target location, automatically rendering the trajectory in the graphical user interface.
Owner:SCHLUMBERGER TECH CORP
Geosteering control framework
A method can include acquiring resistivity measurements using a downhole tool of a drillstring disposed in a borehole in a subsurface environment; performing a resistivity measurement-based inversion to generate a structural representation of a portion of the subsurface environment that includes an end of the borehole; generating a control instruction using an artificial intelligence framework and the structural representation, where the control instruction is for lengthening the borehole along a current borehole trajectory or a different borehole trajectory; and controlling the drillstring to lengthen the borehole based on the control instruction.
Owner:SCHLUMBERGER TECH CORP
Target trajectory for geosteering drilling of a wellbore
A method comprises retrieving geoscience data of a subsurface formation into which a wellbore is being drilled and retrieving drilling operation data for drilling the wellbore. The method includes determining at least one of an optimized target trajectory of a path of the wellbore to be drilled or a series of control operations for the drilling in order to follow the path of the wellbore to be drilled, independent of using waypoints as input and based the geoscience data and the drilling operation data. The method includes modifying geosteering of the drilling of the wellbore based on the at least one of the optimized target trajectory or the series of the control operations.
Owner:HALLIBURTON ENERGY SERVICES INC
Multi-dimensional geosteering method for middle-deep layer coal bed gas horizontal well
The invention discloses a multi-dimensional geosteering method for a middle-deep layer coal bed gas horizontal well. The method comprises the following steps that S1, three-dimensional earthquake-geologic models of a marker bed and a target coal bed are established; s2, the hole drift angle of each marker bed during drilling is determined; s3, predicting the depth, thickness, stratigraphic dip and spatial distribution characteristics of the target coal seam; s4, ensuring accurate target entering of the horizontal well by adopting a layer-by-layer approaching method; s5, comprehensively analyzing horizontal section data to ensure high drilling rate; the method is suitable for the technical field of coal bed gas development, the marker bed hole drift angle layer-by-layer approaching control target entering technology is adopted, the optimal hole drift angle of each marker bed is quantitatively determined, in the actual drilling process, geosteering personnel only need to judge whether the hole drift angle meets the design or not when drilling is carried out on each marker bed, the analysis content and steps are simplified, and the efficiency is improved. And the analysis time when the depth deviation with the designed marker bed is large is saved, and the drilling time efficiency is improved.
Owner:SHANXI JINXIANG COAL-TO-GAS CO LTD +4
Intelligent underbalanced coiled tubing drilling (UBCTD) geosteering operations advisory system and method of use
A method that may include obtaining well path data describing a first well path through one or more formations. The method may include obtaining first acquired drilling parameter data in real-time during a drilling operation for a predetermined well, wherein the drilling operation corresponds to the first well path. The method may include determining, by a computer processor, first predicted drilling data using a machine-learning model, the well path data, and the first acquired drilling parameter data, wherein the first predicted drilling data may include a predicted well path. The method may include determining whether the first predicted drilling data satisfies a predetermined criterion. The method may include determining, in response to determining that the first predicted drilling data fails to satisfy the predetermined criterion, an adjusted well path. The method may include transmitting a first command to update the drilling operation to implement the adjusted well path.
Owner:SAUDI ARABIAN OIL CO
Geosteering control framework
A system and method may include receiving data acquired by a downhole tool of a tool string disposed at least in part in a borehole in a subsurface region. The system and method may also include inverting the data using a trained machine learning model to generate a structural feature of the subsurface region. The system and method may further include controlling operation of the tool string based at least in part on the structural feature of the subsurface region.
Owner:SCHLUMBERGER TECH CORP
Geosteering Copilot Assistant
A method and a system comprising: disposing a bottom hole assembly (BHA) into a wellbore, wherein the BHA comprises a measurement assembly; acquiring one or more measurements with the measurement assembly; acquiring historical data from the wellbore; extracting relevant information from the historical data; training a machine learning (ML) model with the relevant information to form a trained ML model; and providing an answer to a question utilizing the trained ML model.
Owner:HALLIBURTON ENERGY SERVICES INC
Geosteering control framework
A method can include receiving data acquired via a drillstring in a borehole in a subsurface environment; determining boundary locations for formations in the subsurface environment using at least a portion of the data, where an end of the borehole is disposed in one of the formations; determining extended boundary locations in the subsurface environment for a region beyond the end of the borehole using the boundary locations; determining a target location in the region; generating a trajectory from an end of the borehole location to the target location; and executing a directional drilling system to control directional drilling of the drillstring that extends the borehole beyond the end of the borehole towards the target location.
Owner:SCHLUMBERGER TECH CORP
Coal bed gas horizontal well geosteering device
The utility model discloses a coal bed gas horizontal well geosteering device, which relates to the technical field of geosteering equipment, and comprises a base, a sliding seat is arranged on the base in a sliding manner, a positioning plate is mounted on the sliding seat, the top end of the positioning plate is connected with a drill rod through a bearing, a driven gear is mounted at the tail end of the drill rod, and the driven gear is meshed with the sliding seat. The driven gear is meshed with a transmission gear, the transmission gear is driven by a motor, and a sliding groove is formed in the drill rod. According to the coal bed gas horizontal well geosteering device, the arranged pushing structure drives the linkage rod to slide in the sliding groove, the adjusting plate can be driven to deviate with the positioning shaft as the axis through cooperation of the mounting groove, the swing groove, the pushing rod and the positioning shaft, and the adjusting plate drives the drill bit to conduct deviation adjustment relative to the drill rod; the structure is integrally arranged on the inner side of the drill rod and can be protected, the driving source is arranged at the tail end of the drill rod through linkage of the linkage rod, and power supply is not affected.
Owner:SHAANXI HUACHEN GASOLINEEUM TECH
A method for predicting fractured carbonate buried hill reservoirs based on geological guidance and multi-scale fusion.
This invention relates to the field of geophysical exploration and oil and gas geological analysis technology, and discloses a method for predicting fractured reservoirs in carbonate buried hills based on geological guidance and multi-scale fusion. The method includes: constructing a three-dimensional geological guidance constraint body using paleogeography and fault systems as geological priors; characterizing the fracture response mechanism using Gabor wavelet frequency division and structural tensor; constructing sensitive attributes and predicting the fracture body using a multi-branch convolutional neural network that fuses multi-source seismic attributes; and calculating the fracture complexity index based on the predicted fracture body to classify and zone the buried hill fractures. This invention introduces geological guidance constraints to improve the geological consistency of the prediction results; utilizes multi-scale Gabor frequency division and structural tensor analysis to achieve multi-scale fracture characterization; enhances model interpretability and prediction accuracy by fusing multi-source attributes through a multi-branch convolutional neural network; and achieves quantitative reservoir classification through the fracture complexity index, effectively guiding well location deployment and drilling decisions.
Owner:CHINA NAT OFFSHORE OIL CORP +1
Thin reservoir horizontal well geosteering method based on three-dimensional model real-time adjustment
The invention discloses a thin reservoir horizontal well geosteering method based on real-time adjustment of a three-dimensional model, which is used for predicting lithology of sand bodies between wells and geosteering the horizontal well by normalizing gamma curves of logging and logging, and comprises the following steps of: 1, normalizing natural gamma curve data of the horizontal well while drilling obtained from logging; the strain is named as GRL; 2, normalizing a logging natural gamma curve according to the mudstone baseline value of the natural gamma curve, and naming the logging natural gamma curve as GRC; 3, performing data inspection on the GRL curve and the GRC curve of the same horizontal well, and splicing the two inspected curves of the horizontal well into GRU; according to the method, in the aspect of mismatching of the data obtained by the logging measurement method and the logging measurement method, the accuracy of the logging measurement data is improved through normalization processing; the matching of the logging data increases the transverse information of the continuous drilling sand body of the horizontal section, and greatly improves the accuracy of the inter-well sand body prediction.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Geosteering methods and systems for improved drilling performance
A method and system for geosteering may generate a misfit function using a spline function. The misfit function may be used to accurately map errors or differences between TVD-based measurement data for one or more reference wells and MD-based measurement data collected during drilling of a subject well, in order to accurately determine a stratigraphic location of the subject well.
Owner:MAGNETIC VARIATION SERVICES LLC
Method and device for measuring radial detection depth of near-bit azimuth gamma while-drilling tool
The invention discloses a measuring method and device for the radial detection depth of a near-bit azimuth gamma tool while drilling. The measuring method comprises the steps that an azimuth gamma receiving short section is arranged around an azimuth gamma transmitting short section; according to the outer diameter of the azimuth gamma emission nipple, a gamma source rock core with the radiation intensity matched with the inner diameter is selected; the gamma source core is arranged outside the azimuth gamma emission short section in a sleeving mode; testing the gamma counting rate of the near-bit azimuth gamma while-drilling tool; increasing the radial width of the gamma source rock core, and testing the gamma counting rate; when the gamma source core is increased from a target radial width and the gamma counting rate cannot be increased, the target radial width is the radial detection depth of the near-bit azimuth gamma while-drilling tool under a radiation intensity; the gamma source cores with different radiation intensities are replaced, and radial detection depths under different radiation intensities are measured. According to the method, the intuition and the reliability of a measurement result are improved, so that field geosteering and well track adjustment can be guided and supported more accurately.
Owner:CHINA NAT PETROLEUM CORP +1
Complex structure stratum while-drilling azimuth electromagnetic wave logging parameterization inversion method
The invention discloses a complex structure stratum while-drilling azimuth electromagnetic wave logging parameterization inversion method, and belongs to the field of oil exploration and development. The method comprises the following steps: s1, modeling a complex geologic structure, constructing a 2D complex geologic model, and parameterizing the 2D complex geologic model; s2, analyzing response characteristics of the 2D complex geological model according to the 2D complex geological model established in the s1, and carrying out influence factor and sensitivity analysis; s3, obtaining observation data according to response characteristics of s2, and constructing an objective function; and s4, in combination with s2 and s3, performing inversion on the parameterized 2D complex geological model by using a PT-MCMC inversion method to realize fine reconstruction of the complex stratum. According to the method, fine reconstruction of the complex stratum is achieved, good inversion precision is achieved, and the characterization capacity and the calculation efficiency are both considered. The method provides support for real-time geosteering, reservoir evaluation, layer interface prediction and the like of oil and gas fields.
Owner:SOUTHWEST PETROLEUM UNIV
A method for geosteering a horizontal well
The application discloses a horizontal well geosteering method, comprising the following steps: acquiring basic data of adjacent wells around a to-be-drilled horizontal well; comparing target reservoirs to obtain the numerical values of the top depth and the bottom depth of the target reservoirs of the adjacent wells and the predicted values of the top depth and the bottom depth of the to-be-drilled horizontal well; comparing X-ray element data to predict the sandstone types of the target reservoirs and the reaction characteristics of the X-ray element data; obtaining the reservoir thicknesses of each adjacent well and the to-be-drilled horizontal well, and establishing a target reservoir thickness model; when the to-be-drilled horizontal well is under construction, drilling to a target point, analyzing and judging whether the actual sandstone type of a drilled formation is the predicted sandstone type, analyzing whether the actual sandstone type is consistent with the predicted value, and when the results are all yes, determining that the model is correct, and continuing to perform horizontal well geosteering. The method can timely correct the prediction result of a seismic inversion reservoir, provide a basis for trajectory adjustment of horizontal well construction, improve the drilling rate of the reservoir, and improve the success rate of trajectory adjustment.
Owner:CHINA PETROCHEMICAL CORP +3
A method of optimizing a geological model by scanning the hole angle
This invention discloses a method for optimizing a geological model by scanning the well inclination angle. It aims to solve the problem of low efficiency and poor accuracy in directional drilling where the geological model inclination angle is constantly fitted to the actual drilling curve to correct the geological model. The core steps are as follows: Step 1: Establish a geological steering model for the current drilling based on the logging and structure of the completed well. Step 2: Set the actual logging curve of the drilling trajectory AB segment as the target curve, and extract the simulated curve from the geological steering model along this segment of the well trajectory. Step 3: Set the inclination scanning range 'a' and the scanning step size 'dlt', read the well inclination angle ∠A at point A, and perform an inclination scanning of the well inclination of segment AB with a step size of 'd1t' within the range of ∠A-a to ∠A+a, extracting the simulated curve from the model at each inclination angle. Step 4: Calculate the similarity between the simulated curve and the target curve using the similarity calculation formula within the range of ∠A-a to ∠A+a, and record the inclination angle difference when the similarity is the maximum. Step 5: Use the angle difference recorded in Step 4 to make the geological model angle after point A equal to the original angle plus the angle difference. Step 6: To ensure continuous model updates, calculate the inclination point forward from point A, thereby guiding directional drilling.
Owner:SINO-OIL SUNSHINE (BEIJING) SCI & TECH CO LTD
Continuous light hydrocarbon analysis system
The utility model belongs to the technical field of oil gas type identification equipment, and discloses a continuous light hydrocarbon analysis system which comprises a detection control device, a sampling device and a continuous light hydrocarbon analysis device, and the sampling device and the continuous light hydrocarbon analysis device are in communication connection with the detection control device. The continuous light hydrocarbon analysis device comprises a sample injector, a switching component, a light hydrocarbon rapid analysis component and a light hydrocarbon fine analysis component which are in communication connection with the detection control device; and the detection control device is used for controlling the switching component to communicate the light hydrocarbon rapid analysis component with the sample injector or communicate the light hydrocarbon fine analysis component with the sample injector according to the category of the received light hydrocarbon analysis instruction. According to the continuous light hydrocarbon analysis system, the requirements of rapid analysis and fine analysis can be met, and effective information is provided for oil-gas exploration and development, geosteering and difficult layer evaluation.
Owner:SINOPEC OILFIELD SERVICE CORPORATION +2
Horizontal well type structure for thin oil layer and guiding method
The invention relates to a horizontal well type structure for a thin oil layer and a guiding method. Acquiring a thin oil layer top boundary line, a thin oil layer bottom boundary line, geologic survey features above the thin oil layer, geologic survey features below the thin oil layer, geologic survey features of the thin oil layer and remote exploration data within a normal distance from a central axis of a well track of the detection section by using data acquired during drilling of the detection section; a production section is drilled, a window entering point of the production section is determined according to the thin oil layer top boundary line, the thin oil layer bottom boundary line and the thin oil layer geological survey characteristics, geological logging data of the production section in front of the window entering point are compared with remote exploration data, and then the while-drilling geosteering tool is calibrated; and according to the geologic survey features above the thin oil layer and the geologic survey features below the thin oil layer, the drilling well is guided and adjusted, so that the horizontal section behind the window entering point extends in the thin oil layer. The detection section is used for detecting the position of the thin oil layer and the geological information of the reservoir and calibrating the while-drilling instrument, so that the borehole is prevented from penetrating through the upper and lower boundaries of the hydrocarbon reservoir.
Owner:SHAANXI YANCHANG PETROLEUM GRP
A non-contact rotary electric and signal transmission device for rotary geological guidance
This utility model relates to the field of geological exploration equipment and power generation technology, and in particular to a non-contact rotary power and signal transmission device for rotary geological steering. The device includes a main body with connecting components fixedly connected to its side. By integrating the power generation mechanism coaxially with the geological steering sub, this utility model avoids the need for additional power generation devices installed outside the drill string or in other locations downhole. This simplifies the overall drilling system structure, reduces space constraints caused by additional components, facilitates operation in confined wellbore environments, does not disrupt the normal drilling process, and eliminates the need for large-scale modifications to existing drilling techniques and equipment. The device can seamlessly integrate with existing rotary geological steering systems, ensuring uninterrupted geological steering functionality. Precise control of the air gap between the stator coil and the permanent magnet rotor is required to ensure high magnetic coupling efficiency while avoiding excessive mechanical vibration and damage.
Owner:BEIJING JIAHE HUITUO PETROLEUM TECH
Methods and systems for logging while drilling and optimized telemetry using artifical intelligence
A method includes obtaining, with an edge computing device disposed in a bottom hole assembly of a drilling system, logging while drilling data. The method further includes determining, with the edge computing device, at least one interpreted quantity of a subsurface using one or more artificial intelligence (AI) models processing the logging while drilling (LWD) data. The method further includes determining, with the edge computing device, an optimal set of data transfer parameters for a telemetry system governed by a set of data transfer parameters, to telemeter the at least one interpreted quantity, where the set of data transfer parameters are continually updated to the optimal set of data transfer parameters while the logging while drilling data is being acquired. The method further includes transmitting, with the edge computing device, one or more guidance control parameters to a geosteering system based on the at least one interpreted quantity.
Owner:SAUDI ARABIAN OIL CO
A multi-element information fusion based deep shale gas horizontal well geosteering method
The present application belongs to the technical field of horizontal well geosteering, and discloses a multi-element information fusion based deep shale gas horizontal well geosteering method, which comprises box optimization, pilot plan modeling, accurate landing and target entering, and horizontal section accurate adjustment. The present application is used for multi-element information fusion based deep shale gas horizontal well geosteering, and rich techniques and methods are accumulated for deep shale gas horizontal well geosteering technology. Through rapid identification of box characteristics, real-time tracking and research, accurate landing and target entering, and fine geosteering tracking, the horizontal section box drilling rate is continuously improved.
Owner:PETROCHINA CO LTD
Stratigraphic dip angle calculation method based on horizontal well geosteering while drilling
The invention discloses a stratigraphic dip angle calculation method based on horizontal well geosteering while drilling, which belongs to the technical field of drilling engineering, and specifically comprises the following steps: determining the reservoir thickness of a horizontal well according to drilling information of a vertical well of an adjacent framework of the horizontal well; determining the distance from a window entering point of the horizontal well to the top of a reservoir, the current hole drift angle of the horizontal well and the length of a horizontal section when the horizontal well penetrates out of a target stratum according to actual drilling information of the horizontal well; the stratum tendency is determined according to the field seismic section condition, and whether the horizontal well drills through the stratum belongs to top penetration or bottom penetration is judged; and calculating a stratigraphic dip by combining the thickness of the horizontal well reservoir, the distance from the window entering point of the horizontal well to the top of the reservoir, the current hole drift angle of the horizontal well, the length of the horizontal section when the horizontal well penetrates out of the target layer, the stratigraphic tendency and the condition that the horizontal well penetrates out of the reservoir. The technical problem that in the prior art, the stratigraphic dip angle cannot be calculated under the condition that no geophysical analysis condition exists or geophysical accurate testing cannot be carried out is solved.
Owner:PETROCHINA CO LTD
Geosteering control framework
PCT designated stageWO2025170578A1Electric/magnetic detection for well-loggingSurveyGeosteeringEngineering
A system and method may include receiving data acquired by a downhole tool of a tool string disposed at least in part in a borehole in a subsurface region. The system and method may also include inverting the data using a trained machine learning model to generate a structural feature of the subsurface region. The system and method may further include controlling operation of the tool string based at least in part on the structural feature of the subsurface region.
Owner:SCHLUMBERGER TECH CORP +3
Horizontal well while-drilling geological early warning method and device
The embodiment of the invention discloses a horizontal well while-drilling geological early warning method and device. The method comprises the following steps: acquiring adjacent well data and designed horizontal well trajectory data, and establishing a first geosteering model of a designed well according to the adjacent well data and the designed horizontal well trajectory data; acquiring actual drilling data of the first drilling, and loading the actual drilling data of the first drilling to the first geosteering model to obtain a second geosteering model of the actual drilling; real drilling data in the drilling process are obtained in real time, the second geosteering model is updated according to the real drilling data obtained in real time, a geosteering stage is determined based on the first geosteering model and the second geosteering model, and an early warning mechanism and an early warning threshold value corresponding to the geosteering stage are determined; a first early warning parameter and a second early warning parameter are obtained, and horizontal well while-drilling geological early warning is conducted according to the first early warning parameter, the second early warning parameter, the early warning mechanism and the early warning threshold value. Therefore, the non-production time and the windowing failure rate are reduced, and the drilling rate of the reservoir is improved.
Owner:CHINA OILFIELD SERVICES LTD
Geosteering difficulty index
Systems and methods for determining a geosteering difficulty index are disclosed. The methods may include obtaining, using a well logging tool, a typelog recorded in a first borehole penetrating a subterranean region of interest and, using a well log interpretation system, identifying at least one geological layer of interest from the typelog, determining a plurality of typelog indices based on typelog values within and adjacent to the at least one geological layer and determining a geosteering difficulty index (“GDI”) based on the plurality of typelog indices. The methods further include determining, using a borehole planning system, a borehole plan for a second borehole based, at least in part, on the GDI.
Owner:SAUDI ARABIAN OIL CO
Deep shale gas horizontal well geosteering method
The invention discloses a deep shale gas horizontal well geosteering method, which belongs to the technical field of geosteering, and comprises the following steps: S1, multi-modal data acquisition, S2, quantum encryption and edge calculation, S3, dual-scale dynamic modeling, S4, cross-scale dynamic fusion, and S5, intelligent decision and error control. Through collaborative innovation of high-temperature-resistant multi-mode sensing, cross-scale dynamic modeling and intelligent decision making, the reliability, real-time performance and accuracy of ultra-deep shale gas horizontal well geosteering are remarkably improved, and comprehensive breakthrough of core indexes such as the reservoir penetration rate, the trajectory control accuracy and the development efficiency is achieved; key technical support is provided for efficient development of ultra-deep shale gas, the double-layer structure optical fiber probe design is adopted, high-precision monitoring of stratum strain is achieved through the inner-layer distributed Brillouin optical fiber, the outer-layer Raman optical fiber is combined with the sulfur-resistant alloy sheath and the high-temperature-resistant buffer layer, and the stability of the sensor in a severe environment is remarkably improved.
Owner:CHENGDU HAOSHENGYU PETROLEUM TECHNOLOGY CO LTD
A Multi-Dimensional Geological Steering Method for Horizontal Wells in Medium-Deep Coalbed Methane Formations
This invention discloses a multi-dimensional geological steering method for horizontal wells in medium-deep coalbed methane formations, comprising the following steps: S1 establishing a three-dimensional seismic-geological model of the marker layer and the target coal seam; S2 determining the well inclination angle of each marker layer encountered; S3 predicting the depth, thickness, dip angle, and spatial distribution characteristics of the target coal seam; S4 using a layer-by-layer approximation method to ensure accurate target entry of the horizontal well; S5 comprehensively analyzing horizontal section data to ensure a high drilling success rate; S6 adjusting and optimizing the model. This invention is applicable to the field of coalbed methane development technology. It adopts a layer-by-layer approximation control technique for the well inclination angle of the marker layer to quantitatively determine the optimal well inclination angle for each marker layer. During actual drilling, geological steering personnel only need to determine whether the well inclination angle meets the design when each marker layer is encountered, simplifying the analysis content and steps, saving analysis time when there is a large deviation from the designed marker layer depth, and improving drilling efficiency.
Owner:SHANXI JINXIANG COAL-TO-GAS CO LTD +4