4results about How to "Reduce drilling risk" patented technology

The application discloses a method and device for adjusting a drilling trajectory of a horizontal well. First, a standard well used for stratum comparison with a well to be drilled is determined, and a horizontal well geosteering model is established in combination with geological data and drilling engineering data. A current well resistivity while drilling and a while drilling gamma curve are compared with a standard well logging curve, and a target point vertical depth is calculated. In combination with a real-time response of a while drilling azimuthal resistivity boundary detection curve, a landing point of a target layer is determined, and a suitable hole inclination angle is used to enter the layer. A drilling trajectory and a relative position relationship with a stratum interface are determined by fitting a while drilling simulation curve of the horizontal well geosteering model with a current well actual drilling curve. A stratum interface azimuth and a distance from the trajectory to the interface are determined in real time by developing a while drilling azimuthal resistivity boundary detection rapid inversion, and the horizontal section drilling trajectory is adjusted. In combination with logging data and directional actual drilling characteristics, a layer position where the trajectory is located is judged, and a sand body distribution and a stratum change trend are predicted in combination with a regional seismic profile, so that the drilling trajectory is pre-adjusted.

The invention belongs to the technical field of natural gas exploration and development, and discloses a fault control type karst residual hill weathering crust gas reservoir favorable area optimization method and related device.The method comprises the steps that well seismic data in a target area are obtained, marker beds are selected according to the well seismic data for layer position calibration, and the stratum thickness of each layer is counted; according to the horizon calibration and the stratum thickness, an impression method and a trend surface removing method are adopted to recover ancient landform and micro-ancient landform forms, and a target area weathering crust interface top surface structure and a fracture distribution diagram are compiled; and calculating an ancient landform evaluation index, a structure evaluation index and a fault evaluation index at the deployment well point according to the ancient landform, the micro-ancient landform, the weathering crust interface top surface structure and the fracture distribution diagram, solving a comprehensive evaluation index of a favorable region, and screening a favorable target region. According to the method, the relevance and interaction of different control factors are explored, a multi-factor fusion method is provided to solve the favorable area, and the method has better evaluation means and accuracy.

This invention relates to a method and apparatus for predicting the depth of the overpressure top surface before drilling in exploration wells. The method includes: collecting formation pressure test data from drilled wells in the study area, including multiple drilled formation pressure test points; obtaining the density curves of the exploration wells; and calculating the overlying strata pressure P of the exploration wells based on the density curves. O and the hydrostatic pressure P of the exploration well 静水 According to the overlying strata pressure P of the exploration well O The hydrostatic pressure P of the exploration well 静水 Based on the aforementioned multiple drilled formation pressure test points, the pre-drilling overpressure top surface depth H of the exploration well was determined. TOP This invention relates to a method for predicting the depth of the overpressure top surface before drilling in exploration wells. It utilizes the trend of density variation with burial depth and analysis of formation pressure test data from drilled wells to avoid the uncertainty caused by relying solely on formation velocity to predict the overpressure top surface, thereby improving the accuracy of overpressure top surface prediction before drilling in exploration wells.

The application provides a device and method for real-time processing of electrical imaging data while drilling, which comprises: a downhole imaging module for collecting resistivity imaging data of a required formation by using a downhole resistivity imaging instrument; an intelligent identification module for analyzing and identifying the collected resistivity imaging data by using a chip structure embedded with a set intelligent feature identification model, determining corresponding formation characteristics of well logging, and associating and fusing the corresponding formation characteristics with matching formation parameters into a feature identification result; and a real-time communication module for transmitting the fused feature identification result to a ground control system. The application establishes a formation feature identification model of resistivity imaging data while drilling based on an intelligent algorithm to perform real-time feature identification, overcomes the time limitation of ground data acquisition in the prior art, improves a data transmission mechanism, helps a ground engineer to obtain effective formation information in time, and thus makes a quick on-site decision, effectively reduces drilling risks, and optimizes the quality of drilling operations.