SU144299A1 - A device for determining the angle of incidence of layers and elements of the occurrence of cracks in field and cameral conditions - Google Patents

Description

The proposed device for determining the angle of incidence of the layers and elements of the occurrence of cracks in field and cameral conditions has, in comparison with the known, simpler design, less iBecoM, greater control convenience and greater measurement accuracy and, in addition, allows to increase productivity.

This is achieved by the fact that it is hinged with a cartridge, interacting through a core with an inclined frame to the vertical circle and with a rotating frame covering it from the outside to a horizontal circle.

The instrument makes it possible to accurately measure the angle of incidence of rocks by core (usually it is measured approximately), as well as to determine the azimuths and angles of incidence of cracks that cut the core. The device can be used to accurately determine the angle of incidence of sedimentary rocks from the core of inclined core drilling wells, to lower the azimuth and angle of incidence of the veins and fractures intersecting such rocks.

Determining the azimuth and angle of incidence of cracks is necessary for the construction of maps and profiles of fractures, for the study of fractured oil reservoirs, for the construction of tectonic maps from drilling data (especially for lower structural floors not emerging to the surface), to study the structure of ore fields.

The drawing shows schematically the device described device.

The device has a base plate 1 with a vertical stand 2 installed on it, carrying a horizontal bracket 5, which is movable in height. The bracket 3 is fixed on the stand by means of a collar 4 and a screw thumb 5.

The device contains a hinged cartridge 6 for inserting into it a core 7, a horizontal circle 8 located under the patent No. 144299-2 ron, with a degree division to determine the azimuth of the dip of the formations; horizontal frame 9, designed to be set to azimuth, taking into account the inclination of the borehole; an inclined frame 10 for measuring the angle of incidence of the layers on the surface of the core and a vertical semicircle 11 with a degree division, provided for counting the angular values of the magnitude of the dip and fractures.

A hinged core cartridge 6, a sloped 10 and a horizontal 9 frame interact via a core, respectively, each with a vertical semicircle 11 and a horizontal circle 8, equipped with degree divisions similar to those used in the limob and vertical circle of theodolites, as well as other angular instruments.

Measurements are made as follows.

The core 7 is clamped in the cartridge 6, the horizontal frame 9 is set at the azimuth of the curvature of the well, and the inclined frame 10 is given a position corresponding to the curvature (according to the inclinogram). Lowering the clamping screw 12, install the cartridge 6 so that the core 7 is located parallel to the inclined frame 10. Then set the horizontal frame 9 to the azimuth of the dip of layers (on the geological or structural map) and, letting go of one of the screws 13 holding the core, turn it around the axis so that the location of the layers on the core surface is directed along the set azimuth, and the angle of incidence of the layers on the core surface is measured using an inclined frame. Then the plane of the inclined frame is set parallel to the plane of the cracks and the azimuths are counted along the horizontal circle 8, and the angles of incidence of the cracks are measured along the vertical semicircle //.

The prototype of the described device was manufactured, tested and showed good results under operating conditions.

Subject invention

A device for determining the angle of incidence of layers and elements of the occurrence of cracks in field and cameral conditions, containing a stand, a stand and a horizontal arm carrying horizontal and vertical circles with divisions into degrees, characterized in that, in order to increase labor productivity and accuracy of measurements, it is hinged with a cartridge, which interacts through the core with an inclined frame to the vertical circle and with a pivoting frame to the horizontal circle on the Outside side.