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17 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.
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
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
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
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
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
A rotary steering device for zero blind area geological parameter measurement
This application provides a rotary steering device for zero-blind-zone geological parameter measurement, relating to the field of engineering drilling technology. It includes a connecting section, an upper spindle, a lower spindle, and a drill bit connected in sequence. The connecting section houses a power supply and communication module. The upper spindle has a bushing with a rotary steering module mounted on it, and the lower spindle houses an azimuth gamma geological steering module. It also includes two transmission mechanisms. The first transmission mechanism comprises a first part and a second part, which generate an excitation magnetic field to electrically connect the power supply and communication module to the rotary steering module. The second transmission mechanism comprises a third part and a fourth part, which abut against each other to electrically connect the power supply and communication module to the azimuth gamma geological steering module. By using the second transmission mechanism to power and communicate with the azimuth gamma geological steering module, and using the first transmission mechanism to power and communicate with the rotary steering module, near-drill bit measurement capabilities are integrated into the rotary steering system, achieving closed-loop steering control, improving drilling accuracy, and ensuring wellbore trajectory quality.
Owner:ORIENT ENERGY & TECH CO LTD
Real time interactive geosteering using virtual reality
Examples of a method, system, and control system are disclosed herein. In one embodiment, a method comprises obtaining real time measurement data of a subsurface formation while drilling one or more wellbores into the subsurface formation; performing inversions of the measurement data to transform the measurement data into physical geology representations surrounding the one or more wellbores; communicating the measurement data and physical geology representations with two or more users, the two or more users including at least one remote user equipped with virtual reality (VR) equipment configured for interactive viewing of the measurement data and geology representations in real time and interactive control of drilling operations at the one or more wellbores; receive inputs from the two or more users; and adjusting at least one drilling parameter in at least one wellbore during drilling operations in response to the inputs from at the at least one remote user.
Owner:HALLIBURTON ENERGY SERVICES INC
A logging while drilling and measurement integrated drill tool combination
This invention discloses an integrated logging-while-drilling (LOD) and measurement drill string assembly, relating to the field of oil and gas drilling engineering technology. It provides a series connection scheme for core protective drill string components, offering two switchable configurations: one with a mud motor and one without. Both configurations consist of an azimuth density neutron logging sub, a bidirectional communication power supply sub, an acoustic logging sub, a resistivity logging sub, an upper connecting sub, a flexible sub, a lower connecting sub, an azimuth gamma logging sub, and a steering actuator connected in series according to a fixed logic. The configuration with a mud motor only requires adding a mud motor at a designated location to complete the structural switch, without changing the series connection of the remaining subs. This assembly scheme is applicable to various drilling scenarios such as offshore exploration and development, deepwater drilling, complex directional wells, highly deviated wells, and horizontal wells. It enables integrated operations of geological steering, formation evaluation, and wellbore stability analysis during drilling, effectively improving drilling efficiency and reducing operational risks.
Owner:TIANJIN SHUZHI SPACE ENERGY EQUIPMENT CO LTD
Drilling systems for geosteering with historical data and associated methods and devices
PCT designated stageWO2026135969A1Directional drillingAutomatic control for drillingGeosteeringWell drilling
A method of drilling a wellbore includes collecting historical data from a formation. The method further includes defining a stratigraphic signature of a region of interest in the historical data. The method also includes identifying boundary conditions of the region of interest. The method further includes capturing a real-time measurement from a downhole tool. The method also includes comparing the real-time measurement to the historical data. The method further includes determining a probability of the real-time measurement from the downhole tool being vertically positioned in the region of interest.
Owner:BAKER HUGHES OILFIELD OPERATIONS LLC
Geosteering control framework
Owner:SCHLUMBERGER TECH CORP
Geosteering control framework
A method may include receiving resistivity data acquired by a downhole tool of a drillstring disposed at least in part in a borehole in a subsurface environment, where the borehole includes a downhole end, and where the borehole defines a borehole axis; receiving seismic data for the subsurface environment, where the seismic data include spatial locations; and generating a displacement field using the resistivity data and the seismic data, where the displacement field specifies displacement values with respect to the spatial locations of the seismic data.
Owner:SCHLUMBERGER TECH CORP
Geosteering control framework
Owner:SCHLUMBERGER TECH CORP
A seismic time-depth dual-domain calibration method and device based on VSP logging
The application discloses a seismic time-depth dual-domain calibration method and device based on VSP logging, and uses a VSP corridor stack profile with layer velocity accuracy, high resolution and accurate time-depth relationship as a bridge; an accurate wave group corresponding relationship is established by using a VSP corridor stack time domain profile and a pre-stack depth migration time domain seismic profile; and an accurate calibration relationship is established by using a VSP corridor stack depth domain profile and a pre-stack depth migration depth domain seismic profile. Meanwhile, the VSP corridor stack profile itself has depth information, and has good comparability with logging curves, logging interpretation results and lithology information of a real drilling well. Therefore, accurate matching among geology, logging and seismic can be realized, accurate well-seismic calibration of different depths, different lithologies and different thickness reservoirs can be completed, and the accuracy in the process of geology, seismic interpretation and drilling geosteering is improved, which has important significance for well-seismic calibration of blocks with large burial depth, complex structure and fast vertical and horizontal velocity changes.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Geosteering device for kilometer-level horizontal continuous coring
The application discloses a geological directional drilling device for kilometer-level horizontal continuous coring, and belongs to the technical field of geological exploration process equipment design and manufacturing. The geological directional drilling device for kilometer-level horizontal continuous coring has the advantages of high adaptability to complex environment, obvious increase of the ability of deflecting and drilling, and the like. The geological directional drilling device comprises a drill bit, a drilling support shell, a continuous coring channel, a composite power driving system and a continuous monitoring control system. The continuous coring channel is arranged in the drilling support shell. The drill bit is arranged on the drilling end of the drilling support shell through the composite power driving system under the cooperation of a groove. An underground control assembly is arranged in the drilling support shell outside the continuous coring channel. A continuous monitoring assembly is connected with a ground control assembly arranged on the ground. The drill bit drills and deflects under the cooperation of the underground control assembly and the ground control assembly. The drilling parameters of the drill bit are monitored through the continuous monitoring assembly.
Owner:CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
A multi-adaptation rotary steerable drilling-while-logging drill assembly
PendingCN122358948AGeosteeringDirectional well
This invention discloses a multi-adaptive rotary steerable logging-while-drilling (LSD) assembly, belonging to the field of oil drilling technology. This assembly uses a traditional steerable actuator as its core, forming multiple integrated solutions compatible with existing logging instruments, dual-master control architectures, Russian platforms, rotary steerable systems, and next-generation integrated systems. It is compatible with both drilling conditions with and without mud motors. Component cascading is achieved through flexible subs, conversion subs, upper and lower communication subs, and extension connection components of existing logging instruments. This effectively improves the problems of poor compatibility, low integration, measurement lag, insufficient communication stability under complex conditions, and weak compatibility of existing drilling assemblies. This invention has the advantages of multi-platform compatibility, near-bit synchronous measurement, bidirectional stable communication, and integrated geological guidance, and is suitable for drilling and formation evaluation operations in directional wells, horizontal wells, and extended reach wells.
Owner:TIANJIN SHUZHI SPACE ENERGY EQUIPMENT CO LTD