66 results about "Directional well" patented technology

The invention relates to the field of gas production devices, aims to solve the problems that a gas lift drainage gas production device is large in stratum back pressure, small in production pressure difference and not easy to produce gas, and provides a stratum low-back-pressure drainage gas production device and a using method thereof.The stratum low-back-pressure drainage gas production device comprises a small oil pipe, a large oil pipe, a lifting device, a sitting hanging short circuit and a one-way valve; an annular flow channel is formed between the large oil pipe and the small oil pipe; the lifting device is arranged in the small oil pipe and provided with a main flow channel in the axial direction of the small oil pipe. The hanging pup joint is arranged on the small oil pipe and located below the lifting device, and the inner space of the hanging pup joint is communicated with the large oil pipe. The one-way valve is arranged below the large oil pipe; an outlet of the one-way valve faces a wellhead. A check valve tubular column structure is adopted, gas serves as power, underground liquid is sucked, and due to the fact that no rod column is arranged, the device is suitable for a vertical well, a directional well, a complex structure well, a horizontal well and the like; after the efficiency of the lifting device is reduced, back flushing of the lifting device is achieved through the sitting and hanging pup joint, and the lifting device is convenient to salvage.

The application provides a method for calculating the ground stress based on the whole process formation leak-off test of a directional well, comprising the following steps: performing the whole process formation leak-off test on the target directional well and recording the test data; calculating the horizontal minimum ground stress and the overburden pressure according to the test data of the whole process formation leak-off test and the rock mechanics characteristic parameters of the target directional well; calculating the fracture pressure value under all possible arrangement combinations of the horizontal maximum ground stress and the horizontal minimum ground stress at the well deviation azimuth of the target directional well according to the stress distribution around the well section of the formation leak-off test well and the tensile failure criterion; drawing the contour map of the fracture pressure to establish the ground stress query chart of the target directional well; and querying the horizontal maximum ground stress corresponding to the calculated horizontal minimum ground stress in the ground stress query chart. The application calculates the ground stress based on the test data of the whole process formation leak-off test of the target directional well, and effectively improves the accuracy of the calculation result of the ground stress size.

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.

The invention discloses a double-magnetic-source signal generating device and a drill bit orientation verification device and method, and relates to the technical field of drilling, and the double-magnetic-source signal generating device comprises a drill bit, a lower magnetic connector, a bent screw drill, an upper magnetic connector, a non-magnetic drill collar and a drill pipe column which are sequentially connected end to end; the driving device is arranged on the ground surface, is connected with the drill pipe column and is used for driving the drill pipe column to drive the upper magnetic connector and the non-magnetic drill collar to rotate at a first rotating speed, and the upper magnetic connector generates a low-speed magnetic line of force; the earth surface slurry pump circularly drives the rotor of the bent screw drill to rotate at a second rotating speed, the output shaft of the bent screw drill drives the lower magnetic connector and the drill bit to rotate at a third rotating speed, and the lower magnetic connector generates a rapid magnetic line of force; wherein the third rotating speed is the sum of the first rotating speed and the second rotating speed. The azimuth angle of the drill bit can be verified, and accurate butt joint of the drill bit of the directional well relative to the target position is ensured.

This invention discloses a quasi-horizontal well fracturing process for directional shale oil wells. It includes the following steps: S1: Based on the geological and engineering data of the fault-block shale oil reservoir, combined with the fracture parameters of previous fracturing wells in the block, determine the three-dimensional stratification and clustering of the directional well and the main parameters of the fracturing process; S2: Inject acid into the reservoir at a high flow rate for acid pretreatment; S3: Switch to low-viscosity fracturing fluid injection and rapidly increase the flow rate; S4: Inversely design with different construction pressure windows as the core, adopt a three-stage pressure control, flow rate adjustment, and pressure stabilization sand addition mode to complete single-layer fracturing and sand addition; S5: Referring to the above steps, complete the fracturing and sand addition of the remaining layers in the single well. The advantages are: significantly increasing the fracturing fracture length of directional shale oil wells, improving the fracture network support effect and fracture network-controlled reserves, high test production after fracturing, long stable production time, and achieving high-efficiency development of directional wells in structurally complex areas.

The invention discloses an ultra-low permeability reservoir development well type optimization method based on oil layer stacking modes. The method is specifically implemented according to the following steps that 1, the oil layer stacking modes are divided into a thick oil layer, a thin oil layer and a thin interbed according to ultra-low permeability reservoir sand body structure characteristics and reservoir physical property characteristics; 2, according to actual block reservoir parameters, oil reservoir mechanism models corresponding to three oil reservoir stacking modes of a thick oil reservoir, a thin interbed and a thin oil reservoir are established respectively; 3, a directional well, a highly-deviated well and a horizontal well are arranged in the thick oil layer oil reservoir mechanism model, the thin interbed oil reservoir mechanism model and the thin oil layer oil reservoir mechanism model respectively, and numerical simulation calculation is conducted through numerical simulation software; 4, well type optimization is conducted on the thick oil layer, the thin oil layer and the thin interbed according to calculation results of numerical simulation. The problems that in the prior art, the well type adaptability is poor, and the single well yield is low are solved.

The invention belongs to the field of petroleum drilling, and provides a directional well kick margin calculation method, which considers the influence of a hole drift angle when establishing a kick margin calculation model, increases the factors for solving the kick margin, and can obtain a more accurate kick margin calculation result. Comprising the following steps: calculating the maximum allowable shut-in casing pressure; according to the maximum allowable shut-in casing pressure, the maximum allowable overflow invasion height is calculated; considering the influence of the hole drift angle, and calculating the actual section length of the maximum allowable overflow invasion height; according to the actual section length of the maximum allowable overflow invasion height, the overflow volume of fluid invading the shaft at the shaft bottom and the overflow volume of fluid invading the shaft at the casing shoe are calculated; a maximum allowable kick margin is determined based on the overflow volume at the bottom hole of the fluid invading the wellbore and the overflow volume at the casing shoe.

The invention belongs to the technical field of petroleum engineering and fluid force, and particularly relates to a supercritical CO2 in-crack dynamic visual sand-carrying flow simulation experiment device which comprises a supercritical CO2 source pretreatment unit, a fluid-carrying flow simulation experiment unit, a fluid-carrying flow simulation experiment unit, a fluid-carrying flow simulation experiment unit, a fluid-carrying flow simulation experiment unit, a fluid-carrying flow simulation experiment unit, a fluid-carrying flow simulation experiment unit and a fluid-carrying flow simulation experiment unit, the supercritical generation unit is used for converting liquid CO2 into supercritical CO2; the sand mixing unit realizes uniform mixing of supercritical CO2 and a proppant, and monitors the mixing state in real time through a thermometer and a pressure gauge; the well type track simulation unit controls a movable bottom plate to advance and change a motion track through a first driving part and a second driving part, dynamically adjusts the shape of a crack flow channel, and accurately simulates complex tracks of a horizontal well, a directional well, a curved well hole and the like; the flow control unit accurately adjusts the flow and pressure of the system; and the CO2 recovery unit realizes purification and cyclic utilization of CO2 through a desanding circulation system and a sand collection tank.

The present invention relates to the technical field of MWD instruments in oil drilling systems, and is an MWD safety key anti-slip device, comprising a circulation sleeve, a docking guide shoe, a guide shoe barrel, a retaining spring, an anti-puncture ring and a directional key. The present invention has a reasonable and compact structure, and the guide surface increases the inner diameter of the upper end of the circulation sleeve. When deployed, various steps and slight tilts and misalignments at the lower end of the guide shoe barrel of the MWD instrument will be guided into the circulation sleeve under the action of the docking guide shoe guide surface. By setting the retaining spring, when the guide shoe barrel is installed in the circulation sleeve, the upper end of the retaining spring and the directional groove can constrain the directional key, so that the directional key cannot fall out of the directional groove, thereby achieving the effect of preventing the key from falling out. The setting of the positioning card table can avoid the misalignment of the opening of the retaining spring and the directional groove after the retaining spring rotates in the card slot, so that the directional key cannot enter the directional groove, thereby meeting the safety requirements of the MWD instrument in high-angle directional wells, especially horizontal wells, expanding the scope of use of the instrument, and ensuring the increase in drilling speed and efficiency.

This invention relates to a method for designing geologically constrained wellbore trajectories in directional wells, belonging to the field of drilling engineering design technology. The specific steps are as follows: For complex multi-target formations, 3D seismic technology is used to accurately locate each target body in space, precisely interpreting the target formation and fault spatial distribution, and then establishing a 3D model of the target formation and faults. For multi-target directional wells with immovable wellheads, a multi-target five-segment trajectories design is adopted. Based on the target point locations, constrained wellbore trajectory data is calculated using the five-segment wellbore trajectory model. 3D seismic data is fused with the drilling targets, spatially positioning the targets on the 3D seismic data volume. Multiple targets to be drilled are then designed using a top-down, multi-target, five-segment wellbore trajectory system. This method effectively avoids the precisely identified fault spatial morphology in 3D seismic data, setting wellbore trajectories for each target body and avoiding the influence of faults.

The present application relates to the field of oil and gas field development research, and provides a method for improving target radius in drilling, comprising the following steps: step 1, determining the main layer of the target block, and determining the production capacity of the main layer; step 2, determining the sweet spot distribution of the well site deployment area based on at least the production capacity of the main layer, and determining the main layer plane and the longitudinal distribution trend of the main layer of the well site deployment area; step 3, determining the well point position based on at least the main layer plane and the longitudinal distribution trend of the main layer of the well site deployment area, and determining the well pattern; step 4, determining the target area range based on at least the well pattern, designing the target point, and designing the target point with the depth of the main layer as the target area range; and step 5, determining the directional well trajectory. The present application takes the depth of the main layer as the design target point, and considers the regular well pattern, so that the directional error of the well trajectory can be effectively reduced, the target accuracy can be improved, the well trajectory can be optimized, the footage can be further reduced, the drilling cycle can be shortened, the field operation efficiency can be improved, and the investment can be saved.

The invention discloses a vertical well / directional well production pressure difference evaluation method suitable for casing perforation well completion. The method comprises the steps that firstly, the sum of formation pressure consumption, perforation pressure consumption and gravel pressure consumption is adopted as the theoretical production pressure difference; the difference value between the pump inlet pressure during pump stopping and the pump inlet pressure during production is used as the actual production pressure difference; and the permeability of the gravel layer in the perforation hole is repeatedly adjusted, so that the change rule and numerical value of the theoretical production pressure difference and the actual production pressure difference at the initial stage of production are consistent, the permeability of the gravel layer in the equivalent perforation hole is obtained, and finally the long-term production pressure difference of the production well is calculated by utilizing the permeability of the gravel layer in the effective perforation hole. According to the perforation parameters, the geological parameters and the actual production parameters of the vertical well and the directional well, the production pressure difference of the vertical well and the directional well in a casing perforation well completion mode is accurately evaluated, a mainstream theory multi-skin factor production pressure difference algorithm is simplified, the calculation process is simple, and the calculation result is more accurate.

The application discloses a kind of drilling directional well wellbore trajectory mapping equipment, comprising: frame body, four corners are provided with the roller assembly for facilitating its movement;Moving piece, slidingly disposed on the horizontal beam of the upper end of the frame body;Wellbore positioning member, slidingly connected to the moving piece by pulley assembly;Telescopic member, rotationally disposed at the lower end of the wellbore positioning member;Sand breaking member, connected to the telescopic member;And mapping member, disposed at the lower end of the sand breaking member.

The utility model relates to an inclined shaft type oil well pump, which belongs to the technical field of oil extraction equipment for oil fields and comprises a pump cylinder, a plunger is arranged in the pump cylinder, an elastic reset traveling valve is arranged at the upper end of the plunger, a mechanical forced reset traveling valve is arranged at the lower end of the plunger, and an upper oil outlet connector is arranged above the elastic reset traveling valve. The plunger pump is used in a highly-deviated well and a directional well and can be installed in the mode that a common tubing pump descends into the well, an oil pipe does not need to be pulled out when the plunger piston is replaced through regular pump inspection, the workload of pump inspection is greatly reduced, and the oil production efficiency is improved; and each valve pair eliminates the influence of well deviation on the resetting of the valve ball in two modes of elastic resetting and forced resetting, and can be normally used in a gas-containing highly-deviated well.

The invention relates to a directional drilling track profile map drawing method and device, electronic equipment and a storage medium, in particular to the field of geophysical exploration technology and coal mine water control, and the method comprises the steps that firstly, drilling monitoring data of an actual drilling track in an Ordovician aquifer are obtained based on a drilling orientation instrument, and a drilling orientation instrument is established based on the drilling monitoring data; directional well design analysis software is utilized to obtain drilling control parameters corresponding to any measuring point in the actual drilling track; determining a section line corresponding to the actual drilling track according to the drilling design starting point and the drilling design end point corresponding to the actual drilling track; determining the projection length of any measuring point on the section line in the actual drilling track by using a vector projection method; and finally, drawing a profile map corresponding to the actual drilling track based on the projection length of any measuring point on the profile line and the vertical depth of any measuring point. Profile projection analysis of the actual drilling track of directional drilling can be achieved, the drawing efficiency is effectively improved, and it is guaranteed that the actual drilling position is at the designed target layer.

The invention relates to the technical field of marine natural gas hydrate exploitation, in particular to an ultra-long gravity heat pipe assisted natural gas hydrate exploitation system and method. The horizontal mining well extends to the NGH reservoir and is used for collecting natural gas; the horizontal injection well extends to the NGH reservoir and is used for injecting CO2; the directional well penetrates through the NGH reservoir and extends to the geothermal reservoir, and the section, located in the NGH reservoir, of the directional well is obliquely arranged; according to the flexible gravity assisted heat pipe, a heat-pressure-replacement three-in-one mining system is formed through the mining mode that heat exchange of the flexible gravity assisted heat pipe is combined with horizontal well pressure reduction and CO2 replacement, and the problems of reservoir cooling and secondary hydrate generation of a pressure reduction method, heat loss and interlayer pollution of a traditional heat injection method and slow dynamics and icing risks of a CO2 replacement method are solved in a targeted mode.

The invention discloses a rotary guiding short section and a well drilling control method, and solves the technical problems that an existing rotary guiding system is single in function, and vertical well drilling and vertical well deflecting need multiple times of drilling. The rotary guiding short section comprises a short section main body used for being connected with drilling equipment; the pushing assembly is arranged on the nipple main body and is used for controlling the drilling direction; the acceleration sensing and measuring assembly is arranged on the nipple main body and is used for measuring well deviation and a gravity tool surface of the drilling equipment; the fluxgate sensing measurement assembly is arranged on the nipple main body and is used for measuring well deviation and a magnetic tool surface of drilling equipment; and the transmission control assembly is arranged on the nipple main body. According to the drilling equipment, the functions of vertical drilling, vertical well deflecting and directional drilling can be achieved at the same time, function switching can be conducted automatically, the functions of vertical drilling, vertical well deflecting and one-time drilling of a three-dimensional directional well are achieved, the number of times of tripping of the drilling equipment is reduced, and therefore the drilling time efficiency is improved.

An ultrahigh-temperature multi-pipe real-time regulation and control layered and segmented injection-production and long-acting monitoring device is characterized in that a heat insulation oil pipe is arranged at the lower end of a large oil pipe hanger, and a high-temperature production packer is arranged on the heat insulation oil pipe; the heat insulation oil pipe is sequentially connected with the high-temperature jet pump outer working barrel, the high-temperature deep well safety valve, the oil pipe inside and outside penetrating short section, the open type telescopic short section and the steam injection and liquid production channel switching valve, and the steam injection and liquid production channel switching valve is concentrically connected with the first-stage independent injection and liquid production pipe column, the second-stage independent injection and liquid production pipe column and the inserted sealing inner working pipe column. The method has the beneficial effects that an ultrahigh-temperature multi-pipe injection and production switching mode is combined with a high-temperature injection and production integrated process, and the method is not limited to combination of injection and production processes such as high-temperature jet pump injection and production integration, high-temperature Y-pipe electric pump injection and production integration and high-temperature casting and fishing electric pump / screw pump injection and production integration; fine regulation, control, steam injection and liquid production and long-acting monitoring of a large-well-spacing long-well-section horizontal well and a multi-layer high-inclination directional well can be achieved, and the injection and production effect and efficient development of heavy oil thermal production are guaranteed.

The invention discloses a well drilling trajectory intelligent prediction method and system, and belongs to the technical field of oil and gas well drilling. Firstly, multi-source heterogeneous well drilling data are collected and preprocessed; then, by means of a dynamic scale self-adaption mechanism, local detail features from instantaneous anomalies to macroscopic trends are captured in parallel from multi-source heterogeneous data such as while-drilling parameters and stratum information, and local track features of different space-time scales are extracted; through an improved iTransform model, the features are regarded as an overall sequence, and well section global correlation features are learned; and finally, dynamically mining and fusing deep and global dependency relationships among different source features by utilizing a powerful self-attention mechanism, realizing weighted fusion of local and global features through a gating attention fusion layer, and finally realizing accurate prediction of a drilling trajectory under a complex stratum. And technical support is provided for safe and efficient drilling of complex well types of directional wells and horizontal wells.

The invention relates to the technical field of petroleum and natural gas engineering drilling, and discloses a track profile dynamic optimization method and system for drilling, and the system comprises a track model library, an initial value generation unit, an optimization solving unit, a constraint evaluation unit and a result output unit. The orbit model library constructs three-section and five-section orbit section models based on a constant tool face angle, and the optimization solving unit fuses a quasi-Newton method and an artificial bee colony algorithm to realize orbit parameter optimization under multiple variables and multiple constraints. According to the method, an adaptive track profile type is selected through real-time drilling data, and optimized parameters are output after initial value solving, algorithm optimization and constraint evaluation. According to the method, the feedback of the drilling process can be dynamically responded, the target window drilling rate is remarkably improved, the track complexity and the dragging pressure risk of a long horizontal section are reduced, the drilling requirements of directional wells and horizontal wells under complex stratums are met, and technical support is provided for efficient and safe development of drilling operation.

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.

The present application relates to the technical field of oil reservoir engineering, and is a method for calculating oil saturation of a horizontal section of a pilot hole converted into a horizontal well, which comprises: obtaining equivalent oil contents of light oil, medium oil and heavy oil in a horizontal section of a pilot hole converted into a horizontal well; determining an oiliness index of the horizontal section; and calculating the oil saturation of the horizontal section according to the equivalent oil contents of the light oil, the medium oil and the heavy oil and the oiliness index. The present application obtains the equivalent oil contents of the light oil, the medium oil and the heavy oil and the oiliness index of the horizontal section based on quantitative fluorescence logging technology, determines the oil saturation of the horizontal section, realizes fast and accurate acquisition of the oil saturation distribution of the horizontal section of the horizontal well, and provides a scientific basis for oilfield exploration and development and selection of fractured well sections.

The embodiment of the present application relates to the technical field of oil and gas exploration and development, and particularly relates to a wellbore trajectory prediction method and system and a storage medium, comprising: obtaining logging data and directional well construction record data of a target well to be predicted; establishing a well inclination prediction model and an azimuth angle prediction model based on the logging data and the directional well construction record data; and solving the well inclination prediction model and the azimuth angle prediction model by using a Bayesian inference method to obtain wellbore trajectory parameters and a wellbore trajectory parameter confidence interval of a current well section to be predicted in the target well to be predicted. The present application is applicable to complex geological environments and wellbore conditions, can adaptively adjust the model according to newly obtained small amounts of data, can predict unknown parameters in a well inclination / azimuth angle observation equation in real time, and finally realizes uncertainty description of the predicted well inclination / azimuth angle.

The invention belongs to the technical field of petroleum and natural gas drilling engineering, particularly relates to automatic adjusting directional drilling equipment and method for a directional well, and aims to solve the problem that a traditional bent shell motor cannot automatically adjust the angle of a drill bit. A rotary connecting bin is connected into an opening of the fixed sleeve through a bearing. According to the automatic adjusting directional drilling equipment and method for the directional well, the drilling angle of the drill bit body is automatically adjusted through the angle adjusting assembly, and the angle adjusting accuracy is guaranteed by combining the effects of a trigger pointer and an angle induction disc; and meanwhile, the angle induction disc is in data connection with the control panel through a wire, so that when the angle deviates in the drilling process, the deviation can be immediately detected and rapidly adjusted and returned through the control panel, it is guaranteed that the well deviation track meets the design requirement, and the technical effects of improving the finished product quality are achieved.

The application discloses a directional drilling effect evaluation and prediction method and system and electronic equipment, and relates to the technical field of directional drilling. The method comprises the following steps: collecting and preprocessing historical data associated with directional drilling; after the historical data is preprocessed, the preprocessed historical data is subjected to redundant data stripping, data dimension reduction and deep feature fusion in sequence, a plurality of samples are obtained, each sample comprises a feature vector for representing all drilling target parameters and a plurality of parameters associated with a wellbore trajectory; a preset network model is trained based on all the samples, and a directional wellbore trajectory prediction model is obtained; and the wellbore trajectory of directional drilling is predicted according to current data associated with directional drilling and by using the directional wellbore trajectory prediction model. The application trains the preset network model by analyzing and utilizing the historical data associated with directional drilling, and improves the scientificity and accuracy of determining the directional drilling scheme.

The invention belongs to the field of oil field oil extraction technology, oil reservoir monitoring and oil testing and production testing, and discloses an infinite layering oil testing and production testing method for testing a directional well in a dragging mode through a non-metal coiled tubing, and the method comprises the steps that a tool string and a non-metal tubing are put into the well to the designed position through a wellhead sealing and fixing device; the wellhead sealing and fixing device locks and seals the wellhead; after various parameters of the underground oil reservoir are collected and recorded, the electro-hydraulic sealer is reused for setting, and the lower layer of the oil reservoir is plugged; after combined parameters of a reuse electro-hydraulic sealer and an oil testing and production testing oil-submerged pump production pipe column are set, an oil-submerged motor is started for production, flow pressure is controlled to a designed set point, and oil, water and gas yields and related oil reservoir data are recorded through an incoming liquid separation treatment metering device; and according to the flow pressure control set point, the combined working parameters of the reuse electro-hydraulic sealer and the oil testing and production testing oil-submerged pump production pipe column are adjusted. The technical method is wide in application range, high in safety and high in implementation reliability, and plays an important role and significance in the aspect of propelling directional well infinite layering oil testing and production testing.

The application discloses a drilling trajectory intelligent prediction method and system, and belongs to the technical field of oil and gas drilling. First, multi-source heterogeneous drilling data is collected and preprocessed. Then, a dynamic scale adaptive mechanism is used to capture local detail features from transient anomalies to macro trends in parallel from multi-source heterogeneous data such as while-drilling parameters and formation information, and to extract local trajectory features of different space-time scales. Then, an improved iTransformer model is used to regard the above features as a whole sequence, learn global correlation features of the well section, and finally use a powerful self-attention mechanism to dynamically mine and fuse deep and global dependency relationships between different source features. Through a gated attention fusion layer, weighted fusion of local and global features is realized, and finally, accurate prediction of the drilling trajectory under complex formations is realized, thereby providing technical support for safe and efficient drilling of directional wells and horizontal wells.

The invention belongs to the technical field of oil exploitation, and discloses a low-permeability fracture type water breakthrough reservoir water injection well profile control dynamic regulation and control method which comprises the steps that the water breakthrough direction and the corresponding water injection well are judged according to dynamic monitoring data or the well group production dynamic change condition; carrying out profile control treatment on the water injection well by adopting a granular plugging agent; after profile control treatment, the daily water injection rate of a water injection well is adjusted according to the formation energy maintaining condition, meanwhile, main well liquid control production and lateral well parameters are increased, and the subsequent daily water injection rate is adjusted according to the well group liquid amount changing condition; and dynamically monitoring the regulation and control result, and regulating well group production parameters based on the crack plugging effect. According to the method, main cracks can be directionally blocked, lateral oil layer pollution is reduced, deep migration of the profile control agent is promoted, plane liquid production is effectively balanced, and the method has great significance in treating low-permeability crack type water breakthrough and improving uneven plane water drive.

The application provides a method for construction and production of a salt cavern gas storage, comprising the following steps: S1, constructing a single cavity dissolution well type and well pattern combined with a straight well and a directional well; wherein, a cavity construction and halogen discharge point is located at the bottom of the cavity; S2, dividing a cavity construction and operation stage into a slot construction period, a cavity construction period, a capacity expansion period and a gas storage period; S3, optimizing and combining the slot construction period, the cavity construction period, the capacity expansion period and the gas storage period with a static period, a gas injection period, a static period and a gas production period. By adjusting and deploying the cavity dissolution and gas storage linkage coupling of different construction stages in different injection and production cycle stages, the time for the cavity to play a gas storage capacity is advanced, the idle waste of effective gas storage space is avoided, the inefficient conditions such as re-injection or external discharge of low-concentration brine are avoided, the brine receiving capacity and production adjustment capacity of a salt enterprise are fully utilized, and the cavity formed is timely converted into effective gas storage space.

The invention relates to the technical field of safe mud density window prediction methods, in particular to a directional well safe mud density window prediction method which comprises the steps that a pore pressure profile is established; establishing a rock mechanical parameter profile; establishing a crustal stress profile according to overlying rock pressure, formation pore pressure, hole drift angle and azimuth angle; and according to the formation fracture pressure, the formation collapse pressure and the formation pore pressure, a directional well safe slurry density window is established. Segmented prediction of the pore pressure is performed according to the characteristics of stratums with different depths, so that the obtained pore pressure of the stratums is more accurate; when the ground stress is solved, the hole drift angle and the azimuth angle of the directional well are considered; meanwhile, the stratum pore pressure predicted in a segmented manner is also used for solving the ground stress, so that the ground stress calculation is more accurate; and the formation pore pressure and the ground stress which are predicted in a segmented manner also influence the prediction of the directional well safe mud window, so that the prediction precision of the directional well safe mud window is improved.