CN111335877A - Calculation processing equipment for determining logging depth - Google Patents
Calculation processing equipment for determining logging depth Download PDFInfo
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- CN111335877A CN111335877A CN201811452636.4A CN201811452636A CN111335877A CN 111335877 A CN111335877 A CN 111335877A CN 201811452636 A CN201811452636 A CN 201811452636A CN 111335877 A CN111335877 A CN 111335877A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
Abstract
The invention discloses a calculation processing device for determining logging depth, which comprises: the system comprises a suspension weight data acquisition and processing device, a data processing device and a data processing device, wherein the suspension weight data acquisition and processing device is used for acquiring suspension weight pressure signals and determining effective suspension weight data from the suspension weight pressure signals; the well depth calibration device is used for acquiring the lifting/lowering height of the hook on each layer and the pulse count of each layer changing point when the hook is lifted/lowered in advance, and determining the calibration coefficient of each layer corresponding to the layer number of the roller; the well depth tracking device receives the coded disc pulse signal, the direction signal and the hanging weight data, and obtains the variation of the height of the hook according to the relationship between the height of the hook and the pulse counting and the calibration coefficient corresponding to the number of layers of the roller during well depth calibration; and the well depth calculating device is used for acquiring the variable quantity of the height of the hook and calculating to obtain the actual well depth by combining the initial hook height, the initial well depth and the initial drill bit position. According to the equipment disclosed by the invention, the drilling depth data can be acquired in real time in the drilling process, the change of a depth curve is tracked and calculated in real time, the actual well depth is determined, and the drilling operation is guided.
Description
Technical Field
The invention relates to the technical field of well logging, in particular to the technical field of measurement while drilling in the drilling industry, and specifically relates to a computing and processing device for determining a well logging depth in a drilling process.
Background
In the oil exploration drilling and production industries of oil field drilling, well logging and the like, the position and the vertical speed of a downhole instrument need to be accurately known, the accurate well depth is an important index of economic development of oil and gas resources, the real-time calculation, correction and monitoring of the well depth are required to be carried out on almost all downhole operations, such as instrument design and manufacture, rock physical measurement, data acquisition and processing, transmission to the ground and the like, and the well depth calculation and processing are indispensable to be completed by adopting a proper method and sensor equipment.
The existing well depth calculation method, such as a logging-while-drilling depth tracking device (CN101100939A), discloses a depth tracking system which is invented on a digital marine drilling platform because a special totally-enclosed drilling winch system cannot acquire depth signals due to the fact that a depth sensor is not installed at a position, and voltage and current transmitted to each module of a drilling platform driller display system are led out and processed through a signal interface.
Disclosure of Invention
One of the technical problems to be solved by the present invention is to provide a more accurate calculation of the well depth, and to make a complete calculation processing device for determining the well depth.
To solve the above technical problem, an embodiment of the present application first provides a calculation processing apparatus for determining a logging depth, the apparatus including: the system comprises a suspension weight data acquisition and processing device, a data processing device and a data processing device, wherein the suspension weight data acquisition and processing device is used for acquiring suspension weight pressure signals and determining effective suspension weight data from the suspension weight pressure signals; the well depth calibration device is used for acquiring the lifting/lowering height of the hook on each layer and the pulse count of each layer changing point when the hook is lifted/lowered in advance, and determining the calibration coefficient of each layer according to the pulse count; the well depth tracking device is connected with the hanging weight data acquisition and processing device and the well depth calibration device, receives coded disc pulse signals, direction signals and hanging weight data, and obtains the variation of the height of the hook according to the relationship between the height of the hook and pulse counting and calibration coefficients corresponding to the number of layers of the rollers during well depth calibration; and the well depth calculating device is connected with the well depth tracking device, acquires the variable quantity of the height of the hook calculated by the well depth tracking device, and calculates and obtains the actual height of the hook, the actual position of the drill bit and the actual well depth by combining the initial height of the hook, the initial well depth and the initial position of the drill bit.
In one embodiment of the present invention, the suspension weight data collecting and processing device includes: a hook load calculation unit that calculates a hook load value from a suspended load pressure signal acquired within a set time period; a suspending threshold setting part which selects a threshold setting mode and sets a card sitting/leaving threshold according to the calculated hook load value; and the drilling tool seating judging part is connected with the hook load calculating part and the suspended weight threshold setting part, compares the suspended weight value received in real time with the set suspended weight threshold, determines the seating/leaving state of the drilling tool, and further judges the validity of the suspended weight value.
In an embodiment of the present invention, the suspension weight data collecting and processing apparatus further includes: and the threshold mode configuration part is connected with the suspended weight threshold setting part and comprises a single threshold mode, a double threshold mode and a mode for forcibly setting the suspended weight to be effective when the dragging pressure is serious.
In one embodiment of the invention, the well depth tracking device comprises: a hook movement direction judging part which receives the direction signal and determines the current movement direction of the hook; the coded disc signal processing part is connected with the hook movement direction judging part, receives coded disc pulse signals and acquires the current pulse total count value by combining the corresponding movement direction; and the hook height and pulse counting relation determining part is connected with the hook motion direction judging part and the coded disc signal processing part, and calculates the variable quantity of the current hook height corresponding to the current pulse total counting value on the basis of the hook height and pulse counting relation and a calibration coefficient corresponding to the current roller layer number.
In one embodiment of the present invention, the well depth calibration apparatus comprises: a coded disc counting value recording part for recording coded disc pulse counting values when each layer of steel wire rope on the roller is fully wound and the drilling tool is kept still; a hook height and moving distance calculating part which calculates the hook height and the moving distance of each layer of steel wire rope on the roller when the drilling tool is kept still; and the calibration coefficient calculation part is connected with the code disc counting value recording part and the hook height and moving distance calculation part, calculates the layer coefficient of each layer according to the moving distance of the hook of each layer and the pulse counting value of each layer changing point, and acquires the calibration coefficient of each layer according to the layer coefficient of each layer obtained by multiple calculations.
In one embodiment of the invention, the well depth calculation means comprises: a drilling depth setting part which sets an initial well depth, an initial drill bit position and an initial hook height; and the drilling depth calculating part is connected with the drilling depth setting part, obtains pulse counting and layer coefficient corresponding to the initial hook height by utilizing the hook height and pulse counting relation, calculates the maximum bit position according to the variation of the hook height, and compares the maximum bit position with the initial well depth to determine the current actual well depth.
In one embodiment of the invention, the well depth calculation device further comprises: and the well depth control part is connected with the well drilling depth calculation part, updates the well drilling operation state, the current hook position, the current drill bit position and the current well depth, and controls the seating and clamping state of the drilling tool.
In one embodiment of the invention, the well depth calculation device further comprises: and an initial value setting unit that resets, clears, or sets an initial value for the drill position, the drilling depth, and the hook height.
In one embodiment of the present invention, the well depth calculating section calculates the current hook height using the following equation: the current hook height is H + (N-Ni) × k, wherein the current pulse count value N is between the ith layer and the i +1 layer, k is the calibration coefficient of the ith +1 layer, H is the height of the ith layer hook when the calibration is carried out, and Ni is the pulse number of the ith layer.
Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:
according to the well depth calculation processing equipment, the well depth data can be collected in real time in the well drilling process, the change of a depth curve is tracked and calculated in real time, the actual well depth is determined, and the well drilling operation is guided. The system can effectively overcome the defects of the traditional well depth tracking equipment, realizes the accurate depth tracking in the drilling process, has simple system design, simple and convenient operation, accurate well depth correction and strong universality. The method not only can measure the drilling depth in real time, but also has the capabilities of real-time well depth tracking, well depth calibration and well depth calculation.
While the invention will be described in connection with certain exemplary implementations and methods of use, it will be understood by those skilled in the art that it is not intended to limit the invention to these embodiments. On the contrary, the intent is to cover all alternatives, modifications and equivalents as included within the spirit and scope of the invention as defined by the appended claims.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the technology or prior art of the present application and are incorporated in and constitute a part of this specification. The drawings expressing the embodiments of the present application are used for explaining the technical solutions of the present application, and should not be construed as limiting the technical solutions of the present application.
Fig. 1 is a schematic diagram of an overall configuration of a calculation processing apparatus 100 for determining a logging depth according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of the suspended load data acquisition and processing device 10 according to the embodiment of the present application.
Fig. 3 is a schematic configuration diagram of a well depth tracking device 20 according to an embodiment of the present application.
Fig. 4 is a schematic configuration diagram of a well depth calibration device 30 according to an embodiment of the present application.
Fig. 5 is a schematic configuration diagram of a well depth calculation device 40 according to an embodiment of the present application.
Fig. 6 is a functional overview diagram of each component of the computing processing device 100 according to the embodiment of the present application.
Fig. 7 is a schematic flowchart of the work flow of the suspension weight data acquisition and processing device 10 according to the embodiment of the present application.
Fig. 8 is a signal processing flow chart of the well depth tracking device 20 according to the embodiment of the present application.
Fig. 9 is a signal processing flowchart of the well depth calibration device 30 according to the embodiment of the present application.
Fig. 10 is a signal processing flowchart of the well depth calculating device 40 according to the embodiment of the present application.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the accompanying drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the corresponding technical effects can be fully understood and implemented. The embodiments and the features of the embodiments can be combined without conflict, and the technical solutions formed are all within the scope of the present invention.
In this example, a hook sensor and a hanging weight sensor are selected for well depth measurement and calculation during logging while drilling, wherein the hook sensor is also called as a well depth sensor and is arranged on a shaft of a drilling platform winch, and the hanging weight sensor is arranged on a drilling machine dead line fixer. When the drill floor winch rotates and the measuring instrument is lowered, the rotary displacement of the winch is transmitted to the well depth sensor in the form of electric pulses, the well depth sensor records the total number of the pulses by a counter, the moving distance of the big rope is calculated by the total number of the pulses, and the number of the pulses recorded by the counter judges the effectiveness of the number of the pulses by the hanging weight sensor so as to track the well depth. Pulse signals of the well depth sensor and pressure signals of the suspended weight sensor are collected by a collection card, repeated counting caused by jitter interference is eliminated through signal de-jitter processing, an ideal square wave pulse signal is obtained, resolution and depth metering precision of depth counting are improved through frequency doubling pulse technology processing, and finally real-time tracking, calculation and determination of actual well depth are achieved, and drilling operation is guided.
Fig. 1 is a schematic configuration diagram of a calculation processing apparatus 100 for determining a logging depth according to an embodiment of the present application. As shown in fig. 1, the calculation processing apparatus 100 includes a hanging weight data acquisition processing device 10, a well depth tracking device 20, a well depth calibration device 30, and a well depth calculation device 40. The suspension weight data acquisition and processing device 10 is used for acquiring suspension weight pressure signals and determining effective suspension weight data from the suspension weight pressure signals; the well depth calibration device 30 is used for acquiring the lifting/lowering height of the hook on each layer and the pulse count of each layer changing point when the hook is lifted/lowered in advance, and determining the calibration coefficient of each layer according to the pulse count; the well depth tracking device 20 is connected with the hanging weight data acquisition and processing device 10 and the well depth calibration device 30, receives coded disc pulse signals, direction signals and hanging weight data, and obtains the variation of the height of the hook according to the relationship between the height of the hook and pulse counting and calibration coefficients corresponding to the number of layers of the roller during well depth calibration; and the well depth calculating device 40 is connected with the well depth tracking device 20, acquires the variation of the hook height calculated by the well depth tracking device 20, and calculates and obtains the actual hook height, the actual drill bit position and the actual well depth by combining the initial hook height, the initial well depth and the initial drill bit position.
Fig. 6 is a functional overview diagram of each component of the computing processing device 100 according to the embodiment of the present application. The functional flow of each device constituting the computing processing apparatus 100 will now be described in general. As shown in fig. 6, the suspension weight data acquisition and processing device 10 calculates the suspension weight signal acquired in a set time period to obtain a hook load value, sets a suspension weight threshold according to the hook load value, and determines the seating and clamping state of the drilling tool by comparing the suspension weight value acquired in real time with the suspension weight threshold. When the well depth calibration device 30 is used for calibration, the coded disc pulse signals are received, the motion direction of the hook is judged, the moving distance of the hook and the counting value corresponding to each layer of drum of the winch are obtained, and the calibration coefficient is calculated. The well depth tracking device 20 receives the code disc signal and the direction signal to obtain the current pulse count, and calculates the variation of the hook height by using the relationship between the hook height and the pulse count and the calibration coefficient. The well depth calculating device 40 sets an initial hook position, an initial well depth and an initial drill bit position, and obtains a pulse count and a layer coefficient corresponding to the initial hook height position by using the hook height and the pulse count relationship. The well depth calculating device 40 adjusts the initial hook position, the initial well depth and the initial drill bit position, and finally determines the current well depth by combining the variation of the hook height. The well depth calculating device 40 also has a function of controlling the well depth of the drilling well, and can set the drilling operation state, the current hook position, the current drill bit position and the current well depth.
Fig. 2 is a schematic structural diagram of the suspended load data acquisition and processing device 10 according to the embodiment of the present application. The suspended load data acquisition processing device 10 is explained below with reference to fig. 2.
And the hanging weight data acquisition and processing device 10 is used for selecting and judging that the selected data is effective hanging weight data acquired by the hook hanging weight pressure sensor. As shown in fig. 2, the suspension weight data collecting and processing device 10 mainly includes a suspension weight threshold setting unit 110, a drilling tool seating card determining unit 120, and a hook load calculating unit 130. A hook load calculation unit 130 for calculating a hook load value from a signal of the measured weight pressure obtained in a predetermined time period; a hanging weight threshold setting part 110 connected to the hook load calculation part 130, which selects a threshold setting mode and sets a sitting/leaving card threshold (in one example, the value may be an empirical value) according to the magnitude of the calculated hook load value; and a drilling tool seating and clamping judging part 120 connected to the hook load calculating part 130 and the hanging weight threshold setting part 110, for comparing the hanging weight value received in real time with the set hanging weight threshold, determining a seating and clamping/releasing state of the drilling tool, and further judging the validity of the hanging weight value. It should be noted that the threshold for the landing/leaving of the drilling tool may change along with the change of the received hanging weight value, so that the landing/leaving state of the drilling tool can be determined more accurately. The state of the drilling tool is judged through the suspension weight value, and the suspension weight value is mainly used for determining the relative position of the well depth and the drill bit.
In addition, in other examples, the apparatus 10 further includes a threshold mode configuration unit 140 (see the dashed box in fig. 2), and the threshold mode configuration unit 140 includes a single threshold mode, a double threshold mode, and a forced setting of the suspended load valid mode when the dragging pressure is severe. The single threshold mode is that only one card sitting threshold and one card leaving threshold are set; the dual threshold mode is to set a low threshold value and a high threshold value. Considering that the problem of 'dragging pressure' is formed due to the fact that the drilling pressure of a horizontal section is difficult to apply due to the particularity of the well track of the horizontal well, under the condition of serious dragging pressure, the hanging weight value is low in the drilling process and even lower than a set sitting and clamping threshold, at the moment, if the hanging weight value is judged to be effective according to a normal threshold, the well depth tracking is inaccurate, at the moment, the hanging weight value needs to be forcibly set to be effective, and therefore the hanging weight effective mode is forcibly set when the dragging pressure is serious besides a single threshold mode and a double threshold mode.
Generally speaking, when the hanging weight sensor is installed in place, the collected hanging weight pressure signal is valid data, but due to the state of the drilling tool during the drilling process, the collected hanging weight pressure signal is invalid, so the main work of the hanging weight data acquisition and processing device 10 is to judge the validity of the hanging weight signal and determine the relative position of the well depth and the drill bit.
Fig. 7 is a schematic diagram of a work flow of the device 10 for acquiring and processing the hanging weight data according to the embodiment of the present application, and the work flow of the device 10 is described below.
As shown in fig. 7, first, the hook load calculation section 130 processes the suspending weight pressure signal acquired in a set time period, calculates a hook load value, then selects an appropriate threshold mode from the threshold mode configuration section 140, and sets the suspending weight threshold according to the magnitude of the hook load value by the suspending weight threshold setting section 110. Then, the drilling tool seating determining section 120 determines whether the drilling tool is in the seating state or the releasing state, and further determines the validity of the hanging weight pressure signal, that is, the well depth and the drill position.
When the sitting card is in the card leaving state, firstly, whether the suspended weight is set forcibly is judged to be effective, namely whether a 'suspended weight effective mode is set forcibly when dragging and pressing are serious' is judged to be set, if yes, the suspended weight data is directly judged to be effective, and if not, the suspended weight value is compared with the set sitting card threshold and the card leaving threshold. When the hanging weight value is lower than the clamping threshold, the drilling tool is considered to be in the clamping state, and the hanging weight data is invalid; when the hanging weight value is higher than the out-of-clamp threshold, the drilling tool is considered to be in the out-of-clamp state, and the hanging weight data are effective; when the hanging weight value is between the sitting threshold and the leaving threshold, the direction signal of the code wheel is judged: if the direction signal shows that the drilling tool is in the clamping state, the hanging weight data is invalid; if the direction signal shows that the drilling tool is in the downward direction, the drilling tool is considered to be in the off-clamping state, and the hanging weight data are valid.
Fig. 3 is a schematic configuration diagram of a well depth tracking device 20 according to an embodiment of the present application. The well depth tracking device 20 is described next with reference to fig. 3. As shown in fig. 3, the well depth tracking device 20 includes a hook movement direction determination section 210, a code wheel signal processing section 220, and a hook height-to-pulse count relationship determination section 230.
A hook movement direction determination part 210 which receives the direction signal and determines the current movement direction of the hook; a code wheel signal processing part 220 which is connected with the hook movement direction judging part 210, receives the code wheel pulse signal and acquires the current pulse total count value by combining the corresponding movement direction; and a hook height and pulse count relation determining part 230, connected to the hook movement direction determining part 210 and the code wheel signal processing part 220, for calculating a current hook height variation corresponding to the current pulse total count value based on the hook height and pulse count relation and a calibration coefficient corresponding to the current drum layer number. The amount of change in the hook height can be expressed by the following expression: (N-Ni) k, wherein the current pulse count value N is between the ith layer and the i +1 th layer, k is the calibration coefficient of the i +1 th layer, and Ni is the pulse number of the ith layer.
In addition, the hook height/pulse count relationship determination unit 230 can also determine in real time the drilling state, whether to drill to the bottom, whether to start well depth tracking, and the like.
It should be noted that, in the well depth tracking process, actually, the pulse count value is always associated with the height of the hook, and the height of the hook is always changed within a range, so that the pulse count value is also changed (increased or decreased) within a certain range and is not always beyond the range. The input hook height at the set well depth also determines the current pulse count, based on which the pulse is increased or decreased to determine the increase or decrease in depth. Thus, the well depth tracking device 20 of the present example operates based on the principles described above.
Fig. 8 is a signal processing flow chart of the well depth tracking device 20 according to the embodiment of the present application.
As shown in fig. 8, a code wheel pulse signal and a direction signal are obtained, the signals are processed, a total pulse count is obtained by calculating the height of a hook obtained by calibrating the well depth and the pulse count relation, whether the total pulse count exceeds a tracking range is judged, whether a hanging weight signal is effective is judged if the total pulse count does not exceed the tracking range, and drilling well depth setting and control are performed if the hanging weight signal is effective. The current hook height is set, the current corresponding pulse count value is inversely calculated according to the calibration coefficient, well depth tracking is started, and the variation of the hook height is calculated.
The consideration of the operation is that after the well depth calibration is completed, the initial drill bit position, the well depth and the hook height are input, the pulse count value of the current pulse code disc is obtained through inverse calculation, the drilling state (whether the drilling is completed or not) is judged, and the well depth tracking is started. If the back-calculated pulse count value is not within the calibration time range, the initial hook height needs to be readjusted to enable the initial parameters to be valid (generally, an upper limit and a lower limit are set, the maximum value is Max when the pulse count value is higher than the well depth calibration time, and the minimum value is 0 when the pulse count value is lower than the minimum pulse count (negative number)).
Next, the well depth calibration device 30 is explained with reference to fig. 4. And the well depth calibration device 30 is used for acquiring the calibration coefficient of each layer through calibration to help determine the height of the hook when being lifted up when the current rope is wound on the second layer of the roller when well depth tracking is carried out later, and determines the pulse count of each layer and the corresponding height, layer coefficient and calibration coefficient of the hook.
As shown in fig. 4, the well depth calibration device 30 includes a code wheel count value recording section 310, a hook height and movement distance calculating section 320, and a calibration coefficient calculating section 330. A code wheel counting value recording part 310 for recording the code wheel pulse counting value when each layer of steel wire rope on the roller is fully wound and the drilling tool is kept still; a hook height and movement distance calculating part 320 for calculating the height and movement distance of the hook when each layer of steel wire rope on the drum is fully wound and the drilling tool is kept still; and a calibration coefficient calculation unit 330 connected to the code wheel count value recording unit 310 and the hook height and movement distance calculation unit 320, for calculating a layer coefficient for each layer based on the movement distance of the hook for each layer and the pulse count value of each layer change point, and for obtaining the calibration coefficient for each layer based on the layer coefficients for each layer obtained by multiple calculations. The disc count value recording unit 310 may also store the count value. The calibration coefficient calculation section 330 may obtain the calibration coefficient for each layer by averaging the coefficients of the plurality of layers obtained a plurality of times. It should be noted that, in addition to the determination of the calibration coefficient by the above arithmetic mean, a geometric mean, a root mean square mean, a weighted mean, or the like may be used. The average value can also be calculated after performing filtering methods such as smoothing, mean value and median value or performing some methods such as global polynomial interpolation, cubic spline interpolation and Akima interpolation. The invention is not limited in this regard.
In another example, the device 30 may further include a hook movement state detection unit 340 that detects a hook movement state and determines whether the hook movement state is a stationary state or a moving state.
The purpose of the well depth calibration is to determine that the height of the hook when lifted is the current layer of the big rope wound on the roller when the well depth is calculated later, and the well depth can be calculated according to the information. In addition, the calibration here is to determine the pulse count for each layer and the corresponding hook height, from which the layer series is known.
Fig. 9 is a signal processing flowchart of the well depth calibration device 30 according to the embodiment of the present application. The operation of the well depth calibration device 30 will be described below.
And (3) lowering the kelly bar to the bottom (the lowest position of the hook at the moment), resetting the total pulse count, starting counting by taking the kelly bar as a starting point, starting lifting the drilling tool, increasing the pulse count continuously, winding the rolling rope continuously, keeping the drilling tool static when the steel wire rope of the current layer of the roller is fully wound (the rope is on the rolling side), measuring and recording the lifting height of the drilling tool, recording the pulse count value, lifting the drilling tool again, keeping the drilling tool static at the position of a layer changing point, recording the lifting height of the drilling tool, recording the pulse count value, continuously lifting until the hook is lifted to the uppermost position, recording the lifting height of the hook of each layer and the corresponding pulse count value, and calculating. The depth correction can be carried out for multiple times according to the operations, and the precision of the depth correction coefficient is improved and the error is reduced by calculating the average value of the height lifted by each layer and the average value of the pulse number of each layer changing point.
And after the depth correction work is finished, the correction parameters are stored, and if the large rope is not replaced or the large rope is not rolled again by a general drilling team, the correction file is effective all the time and is not required to be corrected again every time of drilling. When the well depth needs to be tracked, the height of the hook is input, and the calibration parameters can be used for reversely deducing which layer of the big rope the current hook is positioned on, and the current counting value can be obtained.
Next, the well depth calculation device 40 is explained with reference to fig. 5.
And the well depth calculating device 40 is used for calculating and determining the height of the hook, the actual well depth and the position of the drill bit according to the number of layers of the roller, the pulse count value or the corresponding calibration coefficient during well depth calibration. As shown in fig. 5, the well depth calculating device 40 includes a drilling depth setting section 410, a drilling depth calculating section 420, and a well depth control section 430. A drilling depth setting part 410 that sets an initial well depth, an initial bit position, and an initial hook height; and a drilling depth calculating part 420 connected to the drilling depth setting part 410, for obtaining a pulse count and a layer coefficient corresponding to the initial hook height by using the hook height and the pulse count relationship, calculating a maximum bit position according to the variation of the hook height, and comparing the maximum bit position with the initial well depth to determine the current actual well depth. The purpose of obtaining the pulse count and the layer series number corresponding to the initial hook height is as follows: the current hook height can be obtained by combining the hook height variable quantity on the basis, so that the current drill bit position and the well depth are obtained, and the currently obtained hook height, the current drill bit position and the current well depth are used for calculating the next well depth tracking.
The well depth may be calculated by the expression: if the total current pulse count value N obtained by the well depth tracking device 20 is between the i-th layer and the i + 1-th layer, the correction coefficient of the i + 1-th layer is k, the height of the i-th layer hook is H (this is the initial hook height), and the pulse number of the i-th layer is Ni (this is the pulse count corresponding to the initial hook height), the drilling depth calculating unit 420 calculates the current hook height using the following formula:
the current hook height ═ H + (N-Ni) × k.
And a well depth control part 430 which is connected with the drilling depth calculation part 420, and updates the drilling operation state, the current hook position, the current drill bit position and the current well depth, and controls the seating and clamping state of the drilling tool.
Additionally, in one embodiment, the well depth calculation device 40 further includes an initial value setting section 440 for initially resetting, zeroing, or initializing the bit position, drilling depth, and hook height.
The well depth calculating means 40 may further include a depth editing section including functions of editing a new well depth, a new hook height, a new weight threshold, and calculating a sag depth using the calculated well depth (depth measurement).
The well depth can be tracked when the well is drilled to the bottom or can be tracked when the well is drilled to the bottom: tracking well depth for fast bottoming down: when the kelly bar is driven to the bottom, the drilling tool keeps static, the current well depth and the drill bit position (the well depth is not equal to the drill bit position) are input, the height of the input hook is 0, and the setting clamp and the departure clamp threshold are input, so that the well depth control is realized; tracking well depth for bottom-out: the drilling tool keeps still, inputs the current well depth and drill bit position (well depth is the drill bit position), inputs the hook height (not 0) at this moment, inputs the seat card and the departure card threshold, and realizes the well depth control.
Fig. 10 is a signal processing flowchart of the well depth calculating device 40 according to the embodiment of the present application.
The well depth calculating device 40 sets an initial well depth, an initial drill bit position and an initial hook height, calculates the current maximum drill bit position by using the hook height obtained by calibrating the well depth and a pulse counting relation according to the change of the hook position, judges whether the maximum drill bit position is greater than the initial well depth, and if so, determines that the current well depth is the maximum drill bit position; the initial well depth is the current well depth.
According to the well depth calculation processing equipment, the well depth data can be collected in real time in the well drilling process, the change of a depth curve is tracked and calculated in real time, the actual well depth is determined, and the well drilling operation is guided. The system can effectively overcome the defects of the traditional well depth tracking equipment, realizes the accurate depth tracking in the drilling process, has simple system design, simple and convenient operation, accurate well depth correction and strong universality. The method not only can measure the drilling depth in real time, but also has the capabilities of real-time well depth tracking, well depth calibration and well depth calculation.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A computing processing device for determining a well log depth, comprising:
the system comprises a suspension weight data acquisition and processing device, a data processing device and a data processing device, wherein the suspension weight data acquisition and processing device is used for acquiring suspension weight pressure signals and determining effective suspension weight data from the suspension weight pressure signals;
the well depth calibration device is used for acquiring the lifting/lowering height of the hook on each layer and the pulse count of each layer changing point when the hook is lifted/lowered in advance, and determining the calibration coefficient of each layer according to the pulse count;
the well depth tracking device is connected with the hanging weight data acquisition and processing device and the well depth calibration device, receives coded disc pulse signals, direction signals and hanging weight data, and obtains the variation of the height of the hook according to the relationship between the height of the hook and pulse counting and calibration coefficients corresponding to the number of layers of the rollers during well depth calibration;
and the well depth calculating device is connected with the well depth tracking device, acquires the variable quantity of the height of the hook calculated by the well depth tracking device, and calculates and obtains the actual height of the hook, the actual position of the drill bit and the actual well depth by combining the initial height of the hook, the initial well depth and the initial position of the drill bit.
2. The computing processing device of claim 1, wherein the hanging weight data collection processing apparatus comprises:
a hook load calculation unit that calculates a hook load value from a suspended load pressure signal acquired within a set time period;
a suspending threshold setting part which selects a threshold setting mode and sets a card sitting/leaving threshold according to the calculated hook load value;
and the drilling tool seating judging part is connected with the hook load calculating part and the suspended weight threshold setting part, compares the suspended weight value received in real time with the set suspended weight threshold, determines the seating/leaving state of the drilling tool, and further judges the validity of the suspended weight value.
3. The computing processing device of claim 1 or 2, wherein the hanging weight data acquisition processing arrangement further comprises:
and the threshold mode configuration part is connected with the suspended weight threshold setting part and comprises a single threshold mode, a double threshold mode and a mode for forcibly setting the suspended weight to be effective when the dragging pressure is serious.
4. The computing processing device of claim 1, wherein the well depth tracking means comprises:
a hook movement direction judging part which receives the direction signal and determines the current movement direction of the hook;
the coded disc signal processing part is connected with the hook movement direction judging part, receives coded disc pulse signals and acquires the current pulse total count value by combining the corresponding movement direction;
and the hook height and pulse counting relation determining part is connected with the hook motion direction judging part and the coded disc signal processing part, and calculates the variable quantity of the current hook height corresponding to the current pulse total counting value on the basis of the hook height and pulse counting relation and a calibration coefficient corresponding to the current roller layer number.
5. A computing processing device according to any of claims 1 to 4, wherein the well depth calibration means comprises:
a coded disc counting value recording part for recording coded disc pulse counting values when each layer of steel wire rope on the roller is fully wound and the drilling tool is kept still;
a hook height and moving distance calculating part which calculates the hook height and the moving distance of each layer of steel wire rope on the roller when the drilling tool is kept still;
and the calibration coefficient calculation part is connected with the code disc counting value recording part and the hook height and moving distance calculation part, calculates the layer coefficient of each layer according to the moving distance of the hook of each layer and the pulse counting value of each layer changing point, and acquires the calibration coefficient of each layer according to the layer coefficient of each layer obtained by multiple calculations.
6. The computing processing apparatus of any of claims 1 to 5, wherein the well depth calculating device comprises:
a drilling depth setting part which sets an initial well depth, an initial drill bit position and an initial hook height;
and the drilling depth calculating part is connected with the drilling depth setting part, obtains pulse counting and layer coefficient corresponding to the initial hook height by utilizing the hook height and pulse counting relation, calculates the maximum bit position according to the variation of the hook height, and compares the maximum bit position with the initial well depth to determine the current actual well depth.
7. The computing processing apparatus of claim 6, wherein the well depth calculating means further comprises:
and the well depth control part is connected with the well drilling depth calculation part, updates the well drilling operation state, the current hook position, the current drill bit position and the current well depth, and controls the seating and clamping state of the drilling tool.
8. The computing processing apparatus of claim 1 or 7, wherein the well depth calculating means further comprises:
and an initial value setting unit that resets, clears, or sets an initial value for the drill position, the drilling depth, and the hook height.
9. The computing processing device of claim 6, wherein the well depth calculation section calculates a current hook height using the following equation:
current hook height ═ H + (N-Ni) × k
The current pulse count value N is between the ith layer and the i +1 th layer, k is the calibration coefficient of the ith +1 th layer, H is the height of the ith layer hook during calibration, and Ni is the pulse number of the ith layer.
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