SU379904A1 - EQUIPMENT FOR SIDE ACCESSORIES SENSING - Google Patents

Description

one

This invention relates to the field of geophysics, in particular, to electrical methods for well testing using the side logging method.

Known equipment for processing data BKZ with the help of electronic digital computers.

However, this equipment contains complex readout and (conversion devices that add additional errors to the processing; processing of measurement results is carried out at the end of research, and considerable time is spent on preparatory operations for processing; a special output device is required to display processing results.

The purpose of the invention is to provide the possibility of automatic data processing in the logging process.

The goal is achieved by the fact that, due to the use of a multi-electrode zoid with a common measuring point, signals are simultaneously recorded that are proportional to the apparent resistances of all gradient probes belonging to the same BKZ points, which eliminates the need for delaying (memory) devices and makes it possible to proceed to the automation of data processing in the logging process. Processing is proposed to be carried out on special analog computing devices (functional converters), the transient characteristics of which are the dependence of apparent resistivity on the true for certain probes sizes, borehole diameter, penetration zone, etc. These dependencies are obtained as a result of the transformation of pallet curves BKZ. The use of transformed curves makes it possible to reduce the number of simultaneously measured parameters, determine the layeredness of the lateral section, apply the simplest analog computational

The device is a functional transducer.

The determination and delivery of the true resistivity of the plate is performed at the intersection point of the CS curves recorded with one-dimensional sequential and reversed gradient probes with a common measuring point. At this point, apparent resistance takes on a value close to optimal.

To eliminate the inertia effect of the galvanometer of the recording channel and gating circuits, the output of the true resistance values is performed by turning on the illuminator of the photoregulator R channel

intersection point of the curves of the COP.

In addition, the selection of reservoir-O) B is achieved by connecting a comparison circuit (division) and a relay element with pasipesa plowness indicator to functional data converters from probes different in length.

Due to the fact that signals proportional to apparent resistances are recorded by gradient probes included in the BKZ complex, at the same time against the same point of the formation during logging, chasing of facets of formations is possible. To do this, circuits for determining the minimum and maximum values of QS connected through pending multivibrators forming imiums to the coincidence circuit and a relay element connected to the horizontal recorder of the photo recorder are connected to the outputs of the channels of the telemetering system that replicate the sequential and inverted gradient probes.

Thus, in the well logging process, electrical logging data is processed by the BKZ technique using relatively simple analog computing facilities, which includes the definition of "outputting the true resistivity, beating of the boundaries of the formations.

The processing results can be converted to a digital code, recorded on a perfoil magnetic tape and transferred to the ino telephone (teletype) in an electronic computer for further processing.

The drawing shows a block diagram of one of the variants of the equipment for automatic processing of side logging sounding data in the logging process.

The apparatus comprises a generator of 1 rectangular pulses; modulators 2, 3; preamps 4, 5; output cascades 6, 7; straighteners 8, 9; subtraction circuit 10; DC amplifier 11; electronic key 12; schemes 13, 14 for determining the maximum value of the CS; schemes 15, 16 for determining the minimum value of the CS; the registrar 17; illuminator / 5 galvanometer; pending multivibrators 19, 20, 21, circuit 22 matches; preamplifier 23; output stage 24; piecewise linear approximator 25; straightener 26; the registrar 27; 28 bounds marker.

PKI, pk2, Pkz - signals proportional to the apparent b resistances measured by gradient probes with a common measuring point.

A device for distinguishing reservoir boundaries by extreme CS values measured by sequential and reversed one-dimensional gradient probes with a common measuring point consists of modulators 2 and 3, controlled by generator 1 of amplifiers 4, 5, 6, 7; schemes 13, 14, 15, 16 for determining extreme values of QS; forming circuits (standby multivibrators) 19, 20, 21; schemes of 22 matches and a marker of 28 graiits layers.

The modulators 2 and 5 are designed to convert the DC voltage at the output of the telemetering system into a continuous alternating voltage due to the fact that it is not possible to use the alternating voltage directly from the amplifying circuit because of its diahrethness.

In addition, in the case of any other telemetric systems with output

by DC, this would ensure the operation of both the device for boundary selection and the differential search circuit for equal values of the CS. Diagrams 13 and 14 determine the maximum

and circuits 5 and 16 are the minimum QS values for the serial and inverted probes with a common measuring point. For normal operation of the schemes for searching for extrema of the CS, it is necessary to prepare the latter (unload the memory capacitors). This is accomplished by applying signals from differential circuit 10 at the time when the CS values are equal in the diagrams of consecutive and inverted one-dimensional gradient probes with a common point.

metering.

The outputs of the maximum QS search values are connected to the waiting multivibrator 19, which determines the duration of the reservoir boundary signal, and the outputs of the minimum CS values search circuits with the waiting multivibrators 20 and 21 connected to one of the inputs of the coincidence circuit 22, the second input of which is connected to the waiting multivibrator 19. Output coincidence circuit

connected to the marker 28 boundaries of the layers.

The principle of operation of the boundary separation device is as follows.

Signals proportional to QS, measured by successive and inverted gradient probes of the same size, are fed to the input of modulators 2 and 5, controlled by a generator / square pulse, amplified by voltage preamplifiers 4 and 5 and by power;

amplifiers 5 and 7 and arrive at circuits 13–16 of searching for extreme values of QS, reset to the initial state by a pulse from differential circuit 10. The time of occurrence of extremes is indicated by a signal with

the output of the waiting multivibrators 19, 20, 21 in the form of a rectangular pulse of a certain duration, fed to the circuit 22. From the output of the coincidence circuit, a signal of a certain duration is recorded, marking the instant of multi-electrode probe passing through the boundary of the reservoir (roof or base) of the CS.

Subject invention

Equipment for lateral logging, containing a multi-electrode 65 probe, consisting of a complex of bipolar

consecutive and inverted gradient probes, a telemetering system, a computing device and a multichannel photo recorder, characterized in that, in order to carry out automatic data processing during the logging process, the outputs of the telemetric system’s channels are connected to functional fast transducers, the outputs of which are connected through a logic device to the input channel. photo recorder whose illuminator is connected to the equal value search circuit via an electronic key, seemingly resistive th, and the outputs of the channel telemetric system

attached to the serial and inverted probes, a circuit for determining the extreme values of apparent resistances is connected, the output of which is connected to the marker of the horizontal lines of the photoregulator through relay relay.