CN116263099A

CN116263099A - Intelligent monitoring method and system for overflow and lost circulation for logging operation

Info

Publication number: CN116263099A
Application number: CN202111533300.2A
Authority: CN
Inventors: 张雷; 罗谋兵; 杨廷红; 余彬
Original assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Current assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2023-06-16

Abstract

The invention provides an intelligent monitoring method and system for overflow and lost circulation for logging operation, wherein the intelligent monitoring method comprises the steps of identifying the motion state of a drilling tool and obtaining overflow and lost circulation monitoring parameters; when the drilling tool is drilled down, comparing whether the static observation time of the drilling tool is larger than the upper time limit or not, and if so, generating alarm information; judging whether the difference between the primary drilling/tripping judging index and the normal loss of drilling fluid is greater than 0 and whether the sum of the drilling/tripping judging index and the normal loss of drilling fluid is less than 0 or not by each interval X-column drilling tool, and if so, generating alarm information; meanwhile, every interval Y-column drilling tool descends/ascends, whether the change speed of the primary drilling fluid volume is larger than the upper limit value of the change speed is judged, and if yes, alarm information is generated. The invention has the characteristics of remote monitoring, timely accuracy and intellectualization, and realizes remote monitoring, timely and accurate monitoring and unattended intelligent monitoring of overflow and lost circulation in the logging tripping process.

Description

Intelligent monitoring method and system for overflow and lost circulation for logging operation

Technical Field

The invention relates to the technical field of drilling monitoring, in particular to an intelligent monitoring method for overflow and lost circulation for logging operation and an intelligent monitoring system for overflow and lost circulation for logging operation.

Background

In the process of tripping a well in a logging operation site, abnormal conditions such as well leakage, overflow, well kick and the like caused by out-of-control formation void pressure are avoided by monitoring the overflow and leakage of drilling fluid and judging the outlet flow, so that the method is a commonly used and timely effective one-time well control safety monitoring method.

At present, two well control safety monitoring modes are divided into manual monitoring and intelligent monitoring. Wherein, manual monitoring means that staff sits on the guard on the circulation tank, observes pond volume scale change and buffer tank flow change, and makes the record. The mode of monitoring the overflow amount by manual sitting on the post can accurately judge, but is relatively lagged, so that some intelligent monitoring methods, such as an analysis method for carrying out overflow leakage early warning trend during the drilling operation, and the like, appear, the volume of a drilling fluid pool is automatically read, and 1.0m is set ³ And (4) threshold early warning, and carrying out trend calculation according to the change of the number of drilling tool strings. However, this approach requires high physical handling of the instrument accuracy.

In the prior art, main problems of the monitoring method of the logging operation site about overflow and lost circulation include:

(1) The abnormal states such as the overflow and leakage of the drilling fluid are monitored in a conventional manual tracking mode, and the threshold value is adopted in an auxiliary mode, so that the manual fatigue is very easy to cause, and manual measurement errors are easy to generate. For example, the liquid level of the drilling fluid tank is greatly fluctuated due to the stirring of the drilling fluid pump, so that the liquid level of the drilling fluid tank is inconvenient to measure, and different people can also have great difference in measurement, so that a more accurate measurement result cannot be obtained;

(2) The tripping process has obvious dependence on manual verification, and lacks intelligent auxiliary judgment means;

(3) The simple single parameter automatic abnormal early warning mode is adopted, false alarm is easy to generate, the early warning mode is mainly single well early warning, and the established early warning model cannot be widely applied to other single wells;

(4) The target type outlet flowmeter or the ultrasonic sensor is generally adopted for monitoring the outlet flow, wherein the target type outlet flowmeter is a percentage obtained according to the gradient formed by the target body caused by the impact of the outlet drilling fluid, and in actual use, the reliability of the target type outlet flowmeter is reduced due to the maintenance frequency of staff and the difference of the states of the flowmeter; the ultrasonic sensor also can cause frequent large fluctuation due to the adjustment of the subsea valve, and the reliability of the measured value is reduced.

A great deal of students have made a great deal of research work on the problems, and have obtained some stage results, but a very complex algorithm is formed for obtaining monitoring parameters for selected monitoring objects and monitoring devices, so as to help identify lost circulation and overflow, and no new supplementary identification means is formed.

For example, an intelligent monitoring method for well overflow and well leakage is disclosed in 29 th year of 2010 and a patent document with publication number of CN 101725327A, and the intelligent monitoring method for well overflow and well leakage is disclosed. The name disclosed in 05/03 2019 is a method for analyzing overflow leakage early warning trend during well drilling operation and during drilling operation, and patent document with publication number of CN 109707368A describes a new method for analyzing overflow leakage trend according to slurry variation, namely, on one hand, by comprehensively examining relevant influencing factors in the well drilling construction process, on the other hand, an advanced computer technology and an intelligent algorithm are applied, and an original fuzzy mathematical processing method and a trend analysis algorithm are applied, so that the slurry leakage trend of the drilling during the well drilling operation can be rapidly identified after the grouting amount or the drainage amount of each column of drill rod is newly acquired, the original cognitive limitation is broken, and the problems of complex calculation, slow operation, untimely operation and the like existing in the current overflow monitoring early warning are solved.

Disclosure of Invention

The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, it is an object of the present invention to provide a method and system that enables intelligent monitoring of drilling fluid spillage and lost circulation during tripping.

In order to achieve the above purpose, the present invention provides an intelligent monitoring method for overflow and lost circulation for logging operation, which comprises the following steps:

identifying the motion state of a drilling tool, and acquiring overflow and lost circulation monitoring parameters, wherein the overflow and lost circulation monitoring parameters comprise the volume change of the drilling tool entering a well, the volume change of the drilling tool exiting the well, the actual volume change of drilling fluid, the volume change speed of the drilling fluid, the normal loss of the drilling fluid and the outlet flow;

in the process of tripping, when the motion state of the drilling tool is static, comparing the static observation time T of the drilling tool _o And an upper time limit T _c If T is the size of _o >T _c If the outlet flow is not 0, generating a tripping overflow alarm message;

when the drilling tool motion state is drill-down, if no grouting action exists, comparing the difference between the drill-down judging index and the normal loss of drilling fluid and the sum of the drill-down judging index and the normal loss of drilling fluid with 0 for one time, if the difference between the drill-down judging index and the normal loss of drilling fluid is greater than 0, generating drill-down overflow alarm information, and if the sum of the drill-down judging index and the normal loss of drilling fluid is less than 0, generating drill-down leakage alarm information;

When the drilling tool motion state is the drilling, if continuous grouting action exists, the difference between the drilling judgment index and the normal loss of drilling fluid and the sum of the drilling judgment index and the normal loss of drilling fluid are respectively compared with 0 once, if the difference between the drilling judgment index and the normal loss of drilling fluid is larger than 0, the drilling overflow alarm information is generated, and if the sum of the drilling judgment index and the normal loss of drilling fluid is smaller than 0, the drilling leakage alarm information is generated;

meanwhile, in the tripping process, judging whether the volume change speed of the primary drilling fluid is larger than the upper limit value of the change speed or not at every interval of the distance of the Y-column drilling tools, and if so, generating tripping/tripping overflow alarm information;

the drill-down judgment index is obtained through calculation of a formula (1), the drill-up judgment index is obtained through calculation of a formula (2), and the formulas (1) and (2) are as follows:

RIHI＝ΔV _p -ΔV _d1 (1)

ROHI＝ΔV _p +ΔV _d2 (2)

wherein RIHI is a trip judgment index, m ³ The method comprises the steps of carrying out a first treatment on the surface of the ROHI is the trip-out judgment index, m ³ ；ΔV _p For the actual volume change of the drilling fluid in the process of tripping or tripping, m ³ ；ΔV _d1 For the volume change of the drilling tool into the well, m ³ ；ΔV _d2 For the volume change of the drilling tool out of the well, m ³ 。

In an exemplary embodiment of the intelligent monitoring method for overflow and lost circulation for logging operation, the X may be 1-100, and the Y may be 1-100.

In an exemplary embodiment of the method for intelligent monitoring of flooding and lost circulation for logging operations of the present invention, the upper time limit T _c Can be 100s to 180s.

In an exemplary embodiment of the logging overflow and lost circulation intelligent monitoring method of the present invention, the step of identifying the motion state of the drilling tool may include:

acquiring the real-time bit position and time of a drill string;

obtaining the movement speed of the drill bit according to the real-time drill bit position and time;

comparing the movement speed of the drill bit with 0, if the movement speed of the drill bit is greater than 0, judging the drilling movement state as drill-down, if the movement speed of the drill bit is equal to 0, judging the drilling movement state as stationary, and if the movement speed of the drill bit is less than 0, judging the drilling movement state as drill-up.

In an exemplary embodiment of the method for intelligent monitoring of overflow and lost circulation for logging operation of the present invention, the step of obtaining a volume change of a drilling tool entering a well or a volume change of a drilling tool exiting the well may include:

acquiring the cross-sectional area and time of the drilling tool entering/exiting the well;

and obtaining the volume change of the drilling tool entering or the volume change of the drilling tool exiting according to the movement speed of the drilling bit, the cross section area and the time of the drilling tool entering or exiting.

In one exemplary embodiment of the intelligent monitoring method for overflow and lost circulation for logging operation, the cross-sectional area of the drilling tool entering the well can be obtained through calculation in the whole process of drilling by the formula (3); in the whole process of tripping, the cross-sectional area of the drilling tool in the well can be obtained through calculation in the formula (4);

the formula (3) and the formula (4) are:

wherein S is ₁ (t) is the cross-sectional area of the drilling tool entering the well at the moment t, m ² ；S ₂ (t) is the cross-sectional area of the well outlet of the drilling tool at the moment t, m ² ；d ₀ (t) is the outer diameter of the drill rod at the moment t, m; d, d _i And (t) is the inner diameter of the drill rod at the moment t, and m.

In an exemplary embodiment of the method for intelligent monitoring of overflow and lost circulation for logging operations of the present invention, the step of obtaining the actual volume change of the drilling fluid may include:

acquiring the volume of a circulating total pool at different moments;

and obtaining the actual volume change of the drilling fluid according to the volumes of the corresponding circulating total tanks at two different moments.

In an exemplary embodiment of the logging overflow and lost circulation intelligent monitoring method of the present invention, the step of determining the upper limit value of the change speed may include:

for the volume change speed of drilling fluid

Tracking the values of (2) to obtain a probability distribution density curve;

determining the maximum value of the corresponding drilling fluid volume change speed when the probability distribution density value on the probability distribution density curve is equal to alpha as the change speed upper limit value v _max Wherein 0 is<α<0.5。

In an exemplary embodiment of the logging overflow and lost circulation intelligent monitoring method of the present invention, the step of determining the normal loss of drilling fluid may comprise:

acquiring at least three groups of reference data, wherein the parameter data comprise the number of drilling well entering/exiting change columns and the normal loss of drilling fluid;

constructing a drilling fluid normal loss function according to the at least three sets of parameter data;

and obtaining the normal loss quantity of the drilling fluid corresponding to the number of the drilling strings to be calculated according to the normal loss function of the drilling fluid.

In an exemplary embodiment of the intelligent monitoring method for overflow and lost circulation for logging operation of the present invention, the intelligent monitoring method may further include:

in the drilling process, grouting action exists, overflow and lost circulation monitoring parameters between the last monitoring point before grouting are obtained, and judgment calculation of the distance overflow and lost circulation of the drilling tool without grouting is carried out to judge whether overflow and/or lost circulation occur or not;

re-acquiring overflow and lost circulation monitoring parameters in the grouting process, and judging whether overflow and/or lost circulation occur or not;

and taking the position of the drill bit after grouting as a new monitoring point, continuing to measure the distance of the drilling tool at X columns at intervals, and performing one-time judgment calculation of the overflow and the lost circulation of the drilling tool distance without grouting so as to judge whether overflow and/or lost circulation occur.

when intermittent grouting actions exist in the process of drilling, judging whether the difference between a one-time drilling judgment index and the normal loss of drilling fluid is greater than 0 or not at intervals of X-column drilling tool distances, if so, generating drilling overflow alarm information, and if not, generating drilling leakage alarm information;

and meanwhile, monitoring whether the outlet flow before grouting is not 0 in the process of tripping, and if so, generating tripping overflow alarm information.

when the depth of the drilling tool does not reach the depth of the X column, the current position of the drilling bit can be manually used for replacing the position of the drilling bit of the X column, and the judgment calculation of the distance overflow and lost circulation of the drilling tool without grouting is carried out so as to judge whether overflow and/or lost circulation occur.

The invention also provides an intelligent monitoring system for overflow and lost circulation for logging operation, which can comprise a drilling tool motion state identification module, an overflow and lost circulation monitoring parameter acquisition module, a drilling tool static monitoring module, an X-column distance overflow monitoring module, an X-column distance lost circulation monitoring module, a total pool volume change trend determination module and an alarm module,

The drilling tool motion state identification module is configured to be capable of acquiring the motion speed of a drill bit in real time and outputting the drilling tool motion state at the current moment;

the overflow and lost circulation monitoring parameter acquisition module is connected with the drilling tool motion state identification module and is configured to acquire overflow and lost circulation monitoring parameters in real time, wherein the overflow and lost circulation monitoring parameters comprise the volume change of a drilling tool entering a well, the volume change of a drilling tool exiting the well, the actual volume change of drilling fluid, the volume change speed of the drilling fluid, the normal loss of drilling fluid and the outlet flow;

the drilling tool static monitoring module is connected with the drilling tool motion state module and the overflow and lost circulation monitoring parameter acquisition module, and is configured to monitor the drilling tool static state and the outlet flow in the tripping process, and if the drilling tool static observation time T is _o Greater than the upper time limit T _c If the outlet flow is not 0, outputting overflow and lost circulation alarm signals;

the X-column distance overflow monitoring module is connected with the drilling tool motion state module and the overflow and lost circulation monitoring parameter acquisition module, and is configured to monitor and judge whether the difference between the one-time drilling judgment index and the normal loss of drilling fluid is greater than 0 or not every interval X-column drilling tool distance when the drilling tool motion state is drilling and no grouting action exists, if yes, a drilling overflow alarm signal is output,

The X-column distance overflow monitoring module is further configured to monitor and judge whether the difference between the one-time drilling start judging index and the normal loss of drilling fluid is greater than 0 or not every interval X-column drilling tool distance when the drilling tool motion state is drilling start and continuous grouting action exists, and if so, a drilling start overflow alarm signal is output;

the X-column distance well leakage monitoring module is connected with the drilling tool motion state module and the overflow and well leakage monitoring parameter acquisition module, and is configured to monitor and judge whether the sum of a one-time drilling judgment index and the normal loss of drilling fluid is less than 0 or not every interval X-column drilling tool distance when the drilling tool motion state is drilling and no grouting action exists, if so, a drilling leakage warning signal is output,

the X-column distance lost circulation monitoring module is further configured to monitor and judge whether the sum of a once lost circulation judgment index and the normal loss of drilling fluid is smaller than 0 or not every interval X-column drilling tool distance when the drilling tool motion state is the lost circulation state and continuous grouting action exists, and if so, a lost circulation alarm signal is output;

the total pool volume change trend determining module is connected with the overflow and lost circulation monitoring parameter obtaining module and is configured to monitor and judge whether the volume change speed of the primary drilling fluid is greater than the upper limit value of the change speed or not every interval Y-column drilling tool distance in the tripping process, and if so, a tripping/tripping overflow warning signal is output;

The alarm module is respectively connected with the drilling tool static monitoring module, the X-column distance overflow monitoring module, the X-column distance well leakage monitoring module and the total pool volume change trend determining module, and is configured to generate corresponding overflow and/or well leakage alarm information after overflow and/or well leakage alarm signals are acquired.

In an exemplary embodiment of the intelligent monitoring system for well logging operation, the intelligent monitoring system may further include a grouting trigger monitoring module, where the grouting trigger monitoring module is connected to the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module, and configured to control the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module to perform acquisition of overflow and lost circulation monitoring parameters and calculation of drilling tool distance overflow and lost circulation judgment respectively before and after grouting to determine whether overflow and lost circulation occur when grouting occurs in a tripping process;

the grouting trigger monitoring module is further configured to control the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module to judge whether the difference between the primary drilling judgment index and the normal loss of drilling fluid is greater than 0 or not when intermittent grouting action occurs in the drilling process, if so, a drilling overflow alarm signal is generated, and if not, a drilling lost circulation alarm signal is generated.

In an exemplary embodiment of the intelligent monitoring system for logging operations of the present invention, the intelligent monitoring system may further include a manual monitoring module, where the manual monitoring module is connected to the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module, and configured to control the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module to acquire and calculate overflow and lost circulation monitoring parameters between a current drilling tool depth and a previous monitoring point, so as to determine whether overflow and lost circulation occur.

In an exemplary embodiment of the intelligent monitoring system for logging operations of the present invention, the intelligent monitoring system may further include an outlet flow monitoring module, where the outlet flow monitoring module is connected to the drilling tool motion state identification module and the overflow and lost circulation monitoring parameter acquisition module, respectively, and configured to monitor and determine whether the outlet flow is not 0 when no grouting is performed when the drilling tool motion state is a drilling tool, and if yes, output a drilling tool overflow alarm signal.

Compared with the prior art, the invention has the beneficial effects that at least one of the following contents is included:

(1) The invention carries out auxiliary supplementary identification on critical working condition operation by adopting drilling tool motion state calculation, determines tripping judgment indexes by establishing normal loss amount formula deduction, time balance relation among volumes and the like, comprehensively uses the change of drilling fluid volume change speed and distribution density thereof, and the relation between drilling fluid actual loss amount and tripping judgment indexes to identify and predict overflow and lost circulation, and improves the accuracy of the whole overflow and lost circulation prediction scheme;

(2) The invention has the characteristics of remote monitoring, timely accuracy and intellectualization, and realizes remote monitoring, timely and accurate monitoring and unattended intelligent monitoring of overflow and lost circulation in the logging tripping process;

(3) The invention has stronger auxiliary judging capability even in high risk areas, has lower cost, and can save manpower, improve working environment and improve working efficiency.

Drawings

The foregoing and other objects and/or features of the invention will become more apparent from the following description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a flow chart of an overflow and lost circulation monitoring method during tripping of an exemplary embodiment of the intelligent monitoring method for logging operations of the present invention.

FIG. 2 is a flow chart of a method for monitoring overflow and lost circulation during tripping of an exemplary embodiment of the intelligent monitoring method for logging operations of the present invention.

FIG. 3 is a graph illustrating normal loss of drilling fluid as a function of one exemplary embodiment of the intelligent monitoring method of overflow and lost circulation for logging operations of the present invention.

FIG. 4 is a probability distribution density map of drilling fluid volume change rate for an exemplary embodiment of the intelligent monitoring method of overflow and lost circulation for logging operations of the present invention.

Detailed Description

Hereinafter, the intelligent monitoring method and system for overflow and lost circulation for logging operations of the present invention will be described in detail with reference to exemplary embodiments.

In order to change the existing logging operation site and completely depend on manual tripping overflow and lost circulation monitoring, the invention provides an intelligent overflow and lost circulation monitoring method for logging operation.

In an exemplary embodiment of the invention, an intelligent monitoring method for overflow and lost circulation for logging operation comprises the following steps: and (3) a method for monitoring overflow and lost circulation in the process of tripping and/or a method for monitoring overflow and lost circulation in the process of tripping.

Specifically, as shown in fig. 1, the method for monitoring overflow and lost circulation during the tripping process may include the following steps:

s11, in the whole process of tripping, the motion state of the drilling tool is identified, and overflow and lost circulation monitoring parameters are obtained. Wherein the overflow and lost circulation monitoring parameters to be obtained during the tripping process can comprise the volume change DeltaV of the drilling tool entering the well _d1 Actual volume change DeltaV of drilling fluid _p Rate of change of drilling fluid volume

The normal loss E of drilling fluid and the outlet flow Q.

S12, monitoring the duration of the drilling tool standstill and the outlet flow by adopting a drilling tool standstill monitoring mode when the drilling tool movement state is standstill in the drilling process, and comparing the observation time T of the drilling tool standstill _o And an upper time limit T _c Is of a size of (a) and (b). If the result of the static monitoring of the drilling tool shows that: t (T) _o >T _c And if the outlet flow is not 0, generating the tripping overflow alarm information.

It should be noted that, during the whole drilling process, if the drill bit does not move, the theoretical outlet flow rate should be 0. Thus if the observation bit is not moved and the observation time T _o Exceeding the upper time limit T _c However, if the outlet flow is available, an alarm is given, and the alarm content can be 'suspected overflow', and the outlet is not cut off when the card is sat. For example, upper time limit T _c Can be 100s to 180s.

And S13, when the drilling tool is in a drilling state, if grouting action does not exist, an X-column distance monitoring mode can be adopted to monitor overflow and lost circulation abnormality possibly occurring in the descending process of the drilling tool. The specific monitoring content of the X column distance monitoring mode is as follows: comparing the difference between the drilling judgment index RIHI (Run in hole Index) and the drilling fluid normal loss E with 0 for one time, and generating drilling overflow alarm information if the difference between the drilling judgment index RIHI and the drilling fluid normal loss E is greater than 0; and if the sum of the drilling judgment index RIHI and the drilling fluid normal loss E is smaller than 0, generating a drilling leakage warning message.

Wherein X is a positive integer and X ε [1,2, … …, len ], len is the maximum number of columns in the drill string. For example, X may be 1 to 100.

The drill-down judgment index RIHI is calculated by the formula (1), and the formula (1) is:

RIHI＝ΔV _p -ΔV _d1 (1)

wherein RIHI is a trip judgment index, m ³ ；ΔV _p For the actual volume change of the drilling fluid in the tripping process, m ³ ；ΔV _d1 For the volume change of the drilling tool into the well, m ³ 。

The tripping overflow alarm information can be 'suspected tripping overflow', the drilling tool changes from xxx column to xxx column, the bit position changes from xxx meter to xxx meter, the xxx side should be returned, the xxx side is returned, and the xxx side is returned; the downhole leakage warning information can be 'suspected downhole leakage', a drilling tool is changed from an xxx column to an xxx column, the bit position is changed from the xxx meter to the xxx meter, the xxx party is returned in practice, and the xxx party is returned in a small amount.

It should be noted that, in theory, the balance relation between the volume change of the drilling tool entering the well and the actual volume change of the drilling fluid is as follows.

Let the volume of drilling fluid in the well bore be V _w (t) auxiliary in-line drilling fluid volume V _l (t) the drilling fluid volume in the circulating total pool is V _p (t). Assuming that the drilling fluid is an incompressible stream, the total amount of drilling fluid remains unchanged during the cycle.

Then there are: v (V) _w (t)+V _p (t)+V _l (t)＝C _m (constant).

In addition, it is assumed that the capacity of the wellbore remains unchanged during tripping.

Then there are: v (V) _w (t)+V _d1 (t)＝C _w (constant).

Wherein V is _d And (t) is the well logging volume of the drilling tool.

In summary, and assuming that the drilling fluid remains unchanged in the auxiliary line at different times, it is possible to obtain at time t ₁ And time t ₂ A simultaneous set of equations is shown below.

After simplification, there are: v (V) _d1 (t ₂ )-V _d1 (t ₁ )＝V _p (t ₂ )-V _p (t ₁ )＝-(V _w (t ₂ )-V _w (t ₁ ))。

Recording device

Then there is DeltaV _d ＝ΔV _p ＝-ΔV _w If the two types of data are not equal, whether an abnormality occurs or not is judged.

In practice, however, the drilling fluid will have to be lost to the wellbore circulation, if at allDue to this loss amount, deltaV occurs _d ≠ΔV _p And if not, it is not an overflow or lost circulation anomaly.

That is, when DeltaV _d1 ≠ΔV _p And judging whether overflow and lost circulation abnormality occur according to the relation between the tripping judgment index RIHI and the drilling fluid loss. For example, if DeltaV occurs after the X-string tool is lowered _p -ΔV _d1 -E(X)>0 (i.e. RIHI>E (X)), which means that after the drilling tool descends the X column, the volume of the drilling fluid actually returned in the circulating total pool is larger than the volume of the drilling fluid theoretically returned, and the situation of overflow during the tripping can be considered to happen; if DeltaV occurs _p -ΔV _d1 +E(X)<0 (i.e. RIHI<E (X)) which indicates that after the drilling tool descends the X column, the actual volume of drilling fluid returned in the circulating total pool is smaller than the theoretical volume of drilling fluid returned, and the situation of tripping leakage can be considered to happen.

And S14, monitoring the change speed of the drilling fluid volume in the tripping process, and judging that overflow abnormality occurs when the change speed of the drilling fluid volume exceeds the upper limit value of the change speed.

For example, the Y-column drilling tool can be moved downwards every interval, and it can be judged whether the change speed of the primary drilling fluid volume is greater than the upper limit value v of the change speed _max If yes, generating the tripping overflow alarm information. For another example, Y may be 1 to 100.

As shown in fig. 2, the method for monitoring overflow and lost circulation during the tripping process may include the following steps:

s21, in the whole process of pulling out the drill, the motion state of the drilling tool is identified, and overflow and lost circulation monitoring parameters are obtained. Wherein the overflow and lost circulation monitoring parameters to be obtained in the tripping process can comprise the volume change DeltaV of the drilling tool in the well _d2 Actual volume change DeltaV of drilling fluid _p Rate of change of drilling fluid volume

The normal loss E of drilling fluid and the outlet flow Q.

S22, when the drilling tool motion state is the drilling, if continuous grouting action exists, an X-column distance monitoring mode is adopted to monitor overflow and abnormal well leakage which possibly occur in the ascending process of the drilling tool. The specific monitoring content of the X column distance monitoring mode is as follows: comparing the difference between the drill taking-up judging index ROHI (Run out of hole Index) and the normal loss E of drilling fluid with 0 for one time, and generating drill taking-up overflow alarm information if the difference between the drill taking-up judging index ROHI and the normal loss E of drilling fluid is larger than 0; and if the sum of the drill-up judging index ROHI and the normal loss E of the drilling fluid is smaller than 0, generating drill-up leakage alarm information. Wherein X is a positive integer and X ε [1,2, … …, len ], len is the maximum number of columns in the drill string. For example, X may be 1 to 100.

For example, the tripping overflow alarm information may be "suspected tripping overflow, drilling tool from xxx column to xxx column, bit position changing from xxx meter to xxx meter, grouting tank volume changing from xxx to xxx, raising (or lowering) xxx, drilling tool volume out of the well volume xxx"; the drilling leakage alarm information can be 'suspected drilling leakage', a drilling tool is changed from an xxx column to an xxx column, the depth of the drilling bit is changed from xxx meters to xxx meters, the volume of a grouting tank is changed from xxx to xxx, and the volume of the drilling tool is discharged from the xxx.

It should be noted that, because of the action of the circulation tank to supplement the grouting tank with drilling fluid, this is an interference factor to the calculation of the pool volume of the grouting tank. Therefore, all data from the supplementing of drilling fluid is removed during the following calculations. When the continuous grouting mode is adopted, the drill-out judgment index ROHI is obtained through calculation of a formula (2), wherein the formula (2) is as follows:

ROHI＝ΔV _p +ΔV _d2 (2)

wherein ROHI is a drill-out judgment index, m ³ ；ΔV _p For the actual volume change of the drilling fluid in the tripping process, m ³ ；ΔV _d2 For the volume change of the drilling tool out of the well, m ³ 。

It should be noted that, in theory, the balance relation between the volume change of the drilling tool in the well and the actual volume change of the drilling fluid may be: deltaV _d ＝ΔV _p ＝-ΔV _w If not, thenJudging whether an abnormality occurs.

In practice, however, the drilling fluid will tend to have a certain loss in the wellbore circulation, if Δv occurs due to the loss _d ≠ΔV _p And if not, it is not an overflow or lost circulation anomaly.

That is, when DeltaV _d2 ≠ΔV _p And judging whether overflow and lost circulation abnormality occur according to the relation between the drill taking judgment index ROHI and the loss of drilling fluid. For example, if DeltaV occurs after the X-string tool is up _p +ΔV _d2 -E(X)>0 (i.e. ROHI>E (X)), which indicates that the actual variable drilling fluid volume in the grouting tank pool is larger than the theoretical variable drilling fluid volume after the drilling tool ascends the X column, and that the situation of overflow during the drilling can be considered to occur; if DeltaV occurs _p +ΔV _d2 +E(X)<0 (i.e. ROHI<E (X)) which indicates that the actual volume of drilling fluid in the grouting tank is smaller than the theoretical volume of drilling fluid after the drilling tool descends the X column, and the situation of well leakage can be considered to happen.

S23, monitoring the change speed of the drilling fluid volume in the process of tripping, and judging that overflow abnormality occurs when the change speed of the drilling fluid volume exceeds the upper limit value of the change speed.

For example, the Y-column drilling tool can be moved upwards every interval, and it can be judged whether the change speed of the primary drilling fluid volume is greater than the upper limit value v of the change speed _max If yes, generating overflow and lost circulation alarm information. For another example, Y may be 1 to 100.

In this embodiment, the method for monitoring overflow and lost circulation during tripping may include: tracking the motion characteristics of the drilling tool and supplementing the automatic identification of critical control actions.

The key action recognition rule of the drill-down is as follows:

drilling into the drilling tool (limited to having back pressure valve): there is a continuous pump stroke.

And identifying a start-stop pump, and summarizing the previous drill-down. The reference volume, column number were recorded. Delay time T after identifying pump stop _c The reference volume is recorded. The actual filling is compared with the theoretical volume,and outputting information. The monitoring is re-established, and the number and the volume of the columns are recorded. Identify the pump on mode, duration T _c Has a pump. In addition, whether the grouting is true or not is identified by the vertical pressure, and if the vertical pressure does not rise obviously, the grouting is not performed in the drilling tool. The grouting process has no vertical pressure, and when the vertical pressure exists, the grouting process indicates that the grouting process is fast full, and if the grouting process is continuously performed, the grouting process has outlet flow.

The key action recognition rules for the drill-out are as follows:

supplementing drilling fluid: with duration T ₁ Pumping for more than seconds, and increasing the volume of the grouting tank pool.

Grouting into the wellbore (limited to intermittent grouting): the grouting tank continuously descends, intermittent grouting is performed, and the grouting tank does not continuously descend.

Make-up drilling fluid (whether intermittent or continuous grouting, pump on need to be identified): identification pump (continuous T) ₂ Pump punched in seconds), summarizing the front drill-out, recording T ₃ Front grouting volume, delay time T after identifying pump stopping ₄ Second, record and submit as the benchmark, reestablish monitoring. T (T) ₁ ,T ₂ ,T ₃ ,T ₄ The value of (2) can be set according to the time situation.

In this embodiment, the step of identifying the drill movement state may include:

(a) Acquiring the real-time bit position and time of a drill string;

(b) According to the real-time bit position and time, obtaining the movement speed of the bit at the current moment;

(c) Comparing the movement speed of the drill bit with 0, and judging the drilling movement state as tripping if the movement speed of the drill bit is greater than 0; if the movement speed of the drill bit is equal to 0, judging that the drilling movement state is static; and if the movement speed of the drill bit is less than 0, judging the drilling movement state as the tripping.

That is, the calculation mode of the drilling tool motion state may be: let the bit position be u (in meters), u being a function of time t, i.e. u=u (t), then the derivative of u with respect to time

Namely the movement speed of the drill bit according to +.>

The value condition can obtain the following characteristics of the motion state of the drilling tool:

in this embodiment, the step of obtaining the volume change of the drilling tool into the well may include:

(a) Acquiring the cross-sectional area and the time of drilling tool logging in a well;

(b) And obtaining the volume change of the drilling tool entering the well according to the movement speed of the drill bit, the cross section area and the time of the drilling tool entering the well.

The step of obtaining the volume change of the drill string out of the well may comprise:

(a) Acquiring the cross-sectional area and the time of the drilling tool in the well outlet;

(b) And obtaining the volume change of the drilling tool in the well according to the movement speed of the drill bit, the cross section area and the time of the drilling tool in the well.

For example, during the whole process of drilling, the cross section area of the drilling tool at the wellhead is set to be S ₁ (t)，S ₁ The value of (t) is calculated based on two factors depending on the current drill string configuration. First, the outer diameter d of the current drill rod ₀ (t) and inner diameter d _i (t); and whether a back pressure valve exists in the drilling combination. Thus, the cross-sectional area of the tool entering the well can be calculated by equation (3), the expression of equation (3) being as follows:

Wherein S is ₁ (t) is the cross-sectional area of the drilling tool entering the well at the moment t, m ² ；d ₀ (t) is the outer diameter of the drill rod at the moment t, m; d, d _i And (t) is the inner diameter of the drill rod at the moment t, and m.

In the whole process of taking off the drill, the cross section area of the drilling tool at the wellhead is set to be S ₂ (t)，S ₂ The value of (t) is to obtain the outer diameter d of the current drill rod according to the configuration condition of the drilling tool table at the time ₀ (t) and inner diameter d _i And (t) calculating the cross-sectional area of the well of the drilling tool by the formula (4), wherein the expression of the formula (4) is as follows:

wherein S is ₂ (t) is the cross-sectional area of the well outlet of the drilling tool at the moment t, m ² ；d ₀ (t) is the outer diameter of the drill rod at the moment t, m; d, d _i And (t) is the inner diameter of the drill rod at the moment t, and m.

According to the cross-sectional area S of the drilling tool at the wellhead ₁ (t), the slave time t can be obtained ₁ By time t ₂ Volume change DeltaV of drilling tool entering well _d1 The method comprises the following steps:

wherein DeltaV _d1 For the volume change of the drilling tool into the well, m ³ ；V _d1 (t ₁ ) For time t ₁ Drilling tool into the volume of the shaft, m ³ ；V _d1 (t ₂ ) For time t ₂ Drilling tool into the volume of the shaft, m ³ ；S ₁ (t) is the cross-sectional area of the drilling tool entering the well at the moment t, m ² ；

Is the movement speed of the drill bit, m/s.

Similarly, according to the cross-sectional area S of the drilling tool at the wellhead ₂ (t), the slave time t can be obtained ₁ By time t ₂ Volume change DeltaV of drilling tool out of well _d2 The method comprises the following steps:

wherein DeltaV _d2 For the volume change of the drilling tool out of the well, m ³ ；V _d2 (t ₁ ) For time t ₁ The volume of the lower drilling tool leaving the shaft, m ³ ；V _d2 (t ₂ ) For time t ₂ The volume of the lower drilling tool leaving the shaft, m ³ ；S ₂ (t) is the cross-sectional area of the well outlet of the drilling tool at the moment t, m ² ；

Is the movement speed of the drill bit, m/s.

In this embodiment, the step of obtaining the actual volume change of the drilling fluid may include:

(a) Acquiring the volume of a circulating total pool at different moments;

(b) And obtaining the actual volume change of the drilling fluid according to the volumes of the corresponding circulating total tanks at two different moments.

From time t, for example, from pool volume data acquired by the survey logging instrument ₁ By time t ₂ Is a drilling fluid variable DeltaV _p The method comprises the following steps:

ΔV _p ＝V _p (t ₂ )-V _p (t ₁ )

in the formula DeltaV _p For the actual volume change of the drilling fluid in the tripping process, m ³ ；V _p (t ₁ ) For time t ₁ Volume of the lower circulation total tank, m ³ ；V _p (t ₂ ) For time t ₂ Volume of the lower circulation total tank, m ³ 。

In the case of continuous grouting, t is ₁ Is the time at which the X column starts, t ₂ Is the time at which the X column ends.

In the case of intermittent grouting, where t ₁ Is the time of grouting start, t ₂ Is the time when the grouting is finished.

In this embodiment, the step of determining the normal loss E of drilling fluid may include:

(a) Acquiring at least three groups of reference data, wherein the parameter data comprise the number of drilling well entering/exiting change columns and the normal loss of drilling fluid;

(b) Constructing a drilling fluid normal loss function according to the at least three sets of parameter data;

(c) And obtaining the normal loss quantity of the drilling fluid corresponding to the number of the drilling strings to be calculated according to the normal loss function of the drilling fluid.

Since the drilling fluid has normal losses during the circulation of the drilling fluid, the normal loss E of the drilling fluid needs to be calculated. At least three groups of data points (n, E (n)) can be selected according to specific conditions, a quadratic function is constructed by using an interpolation method as a drilling fluid normal loss function, the normal loss function is recorded as E (n), and n represents the number of columns of drilling tool well entering changes. In practical application, a plurality of n values can be set according to the situation, wherein n is used as n _s ，n _l Representing a smaller number of columns and a larger number of columns, respectively. For example, three reference data points may be selected: data point 1 (0, 0), i.e., 0 column drill down, 0 square of drilling fluid loss; data point 2 (n) _s ，α _s ) I.e. drill down n _s Column, drilling fluid loss alpha _s A square; data point 3 (n) _l ，α _l ) I.e. drill down n _l Column, drilling fluid loss alpha _l And (3) a prescription. According to the three reference data points, a relation curve of the normal loss amount of the drilling fluid and the number of well logging columns can be drawn, and a finally obtained function curve diagram of the normal loss of the drilling fluid is shown in fig. 3. After interpolation calculation, the normal loss function of the drilling fluid is shown in the following formula.

Wherein E (n) is the normal loss of drilling fluid, m ³ The method comprises the steps of carrying out a first treatment on the surface of the n is the number of columns of drilling tool well entering change.

In the present embodiment, the change speed upper limit v is determined _max The steps of (a) may include:

(a) For the volume change speed of drilling fluid

Tracking the values of (2) to obtain a probability distribution density curve;

(b) Will probably beThe maximum value of the corresponding drilling fluid volume change speed when the probability distribution density value on the rate distribution density curve is equal to alpha is determined as the change speed upper limit value v _max Wherein 0 is<α<0.5。

It should be noted that the actual rate of change of the drilling fluid volume is a derivative with respect to time, i.e.

Can be according to

And (5) judging the change trend of the total pool volume. For example, pair->

Tracking statistics of the values of (2) can be approximated to +.>

Is set to v _max Is->

Upper bound of acceptable probability->

Alpha is more than 0 and less than 0.05. When->

In this case, it can be determined that overflow abnormality occurs. For example, as shown in FIG. 4, when the probability distribution density value on the ordinate is equal to α, the corresponding drilling fluid volume change rate on the abscissa +.>

Can be regarded as the upper limit value v of the change speed _max 。

In this embodiment, the intelligent monitoring method for overflow and lost circulation during the tripping process may further include: in the process of drilling down, when grouting action exists, the monitoring process is divided into two stages, namely treatment before grouting action and treatment after grouting action.

(a) Treatment before grouting

And capturing the grouting starting time, taking the total pool volume at the time as a total pool ending value, and judging whether overflow occurs according to the grouting-free mode for the total pool change condition of the previous stage.

(b) Treatment after grouting action

After the grouting process is finished, calculating related parameter changes caused by the total pool volume before and after grouting and the drill bit depth change, and outputting information of changing the total pool volume before and after grouting from the xxx to the xxx and descending the xxx. Then taking the bit position when the pump is stopped as the bit depth of the new tracking point; the total circulating pool volume at the time of stopping the pump is taken as the total circulating pool volume of the new tracking point.

For example, a grouting trigger monitoring mode may be used to monitor the grouting action distance during the drilling process, where the grouting trigger monitoring mode may include:

It should be noted that the grouting triggering monitoring mode is only limited to use under the condition of having a back pressure valve.

In addition, in this embodiment, the intelligent monitoring method for overflow and lost circulation during the tripping process may further include: and (3) performing grouting action distance monitoring on intermittent grouting actions in the tripping process by adopting a grouting triggering monitoring mode.

The grouting triggering monitoring mode under the grouting breaking action can comprise the following steps:

In the process of lifting the drill, the drilling tool ascends to cause the drilling fluid to descend. But with grouting, the drilling fluid in the wellbore contents can be restored. Grouting is accomplished by a dedicated grouting tank, the volume of which can be obtained for use. The grouting modes are divided into continuous grouting and discontinuous grouting, and the two grouting modes are different, and the judging methods are also different. When continuous grouting action exists in the process of tripping, an X-column distance monitoring mode can be adopted to monitor overflow and abnormal well leakage according to the change of the pool volume of the grouting tank. However, when intermittent grouting action occurs in the process of drilling, the drilling tool is lifted up in the process of no grouting, and no liquid in the well returns to the grouting tank under the condition of no overflow, so that the tank volume of the grouting tank is unchanged, and whether overflow or well leakage occurs cannot be judged by using the tank volume of the grouting tank. The reduction of drilling fluid in the well can be judged only by the grouting amount of each time.

In addition, in the process of drilling, if intermittent grouting occurs, no outlet flow is needed when grouting is not performed, and if so, the situation of drilling overflow is predicted.

In this embodiment, the intelligent monitoring method for overflow and lost circulation during the tripping and tripping processes may further include: and monitoring overflow and lost circulation by adopting a manual monitoring mode. The manual monitoring mode comprises the following specific contents: when the depth of the drilling tool does not reach the depth of the X column, the current position of the drilling bit can be manually used for replacing the position of the drilling bit of the X column, and the judgment calculation of the distance overflow and lost circulation of the drilling tool without grouting is carried out so as to judge whether overflow and/or lost circulation occur.

The invention further provides an intelligent overflow and lost circulation monitoring system for logging operation.

In another exemplary embodiment of the present invention, an intelligent monitoring system for overflow and lost circulation for logging operations may include a tool motion status identification module, an overflow and lost circulation monitoring parameter acquisition module, a tool rest monitoring module, an X-column distance overflow monitoring module, an X-column distance lost circulation monitoring module, a total pool volume change trend determination module, and an alarm module.

The drilling tool motion state identification module is configured to be capable of acquiring the motion speed of the drill bit in real time and outputting the drilling tool motion state at the current moment.

The overflow and lost circulation monitoring parameter acquisition module is connected with the drilling tool motion state identification module and is configured to acquire overflow and lost circulation monitoring parameters in real time, wherein the overflow and lost circulation monitoring parameters comprise the volume change of a drilling tool entering a well, the volume change of a drilling tool exiting the well, the actual volume change of drilling fluid, the volume change speed of the drilling fluid, the normal loss of the drilling fluid and the outlet flow.

The drilling tool static monitoring module is connected with the drilling tool motion state module and the overflow and lost circulation monitoring parameter acquisition module and is configured to monitor the drilling tool static state and the outlet flow in the tripping process, and if the drilling tool is static, the observation time T is the time _o Greater than the upper time limit T _c And if the outlet flow is not 0, outputting a drill-down overflow alarm signal.

The X-column distance overflow monitoring module is connected with the drilling tool motion state module and the overflow and lost circulation monitoring parameter acquisition module, and is configured to monitor and judge whether the difference between the once-drilling judgment index and the normal loss of drilling fluid is greater than 0 or not every interval X-column drilling tool distance when the drilling tool motion state is drilling and no grouting action exists, and if so, a drilling overflow alarm signal is output. The X-column distance overflow monitoring module is further configured to monitor and judge whether the difference between the one-time drilling start judging index and the normal loss of drilling fluid is greater than 0 or not every interval X-column drilling tool distance when the drilling tool motion state is drilling start and continuous grouting action exists, and if so, a drilling start overflow alarm signal is output.

The X-column distance well leakage monitoring module is connected with the drilling tool motion state module and the overflow and well leakage monitoring parameter acquisition module, and is configured to monitor and judge whether the sum of a once drilling judgment index and the normal loss of drilling fluid is smaller than 0 or not every interval X-column drilling tool distance when the drilling tool motion state is drilling and no grouting action exists, and if yes, a drilling leakage warning signal is output. The X-column distance lost circulation monitoring module is further configured to monitor and judge whether the sum of the once lost circulation judgment index and the normal loss of drilling fluid is smaller than 0 or not every interval X-column drilling tool distance when the drilling tool motion state is the drilling, and continuous grouting actions exist, and if yes, a lost circulation alarm signal is output.

The total pool volume change trend determining module is connected with the overflow and lost circulation monitoring parameter obtaining module and is configured to monitor and judge whether the volume change speed of the primary drilling fluid is greater than the upper limit value of the change speed or not every interval Y-column drilling tool distance in the tripping process, and if so, a tripping/tripping overflow alarm signal is output.

The alarm module is respectively connected with the drilling tool static monitoring module, the X-column distance overflow monitoring module, the X-column distance lost circulation monitoring module and the total pool volume change trend determining module and is configured to generate corresponding overflow and/or lost circulation alarm information after obtaining overflow and/or lost circulation alarm signals.

In this embodiment, the intelligent monitoring system may further include a grouting trigger monitoring module, where the grouting trigger monitoring module is connected to the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module, respectively, and configured to control the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module to perform overflow and lost circulation monitoring parameter acquisition and drilling tool distance overflow and lost circulation judgment calculation before and after grouting, respectively, so as to judge whether overflow and lost circulation occur.

In this embodiment of the present invention, the intelligent monitoring system may further include a manual monitoring module, where the manual monitoring module is connected to the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module, and configured to control the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module to acquire and calculate overflow and lost circulation monitoring parameters from the current drilling tool depth to a previous monitoring point, so as to determine whether overflow and lost circulation occur.

In this embodiment, the intelligent monitoring system may further include an outlet flow monitoring module, where the outlet flow monitoring module is connected to the drilling tool motion state identification module and the overflow and lost circulation monitoring parameter acquisition module, and configured to monitor and determine whether the outlet flow is not 0 when there is intermittent grouting action in the drilling tool motion state, and if so, output a drilling-out overflow alarm signal.

By adopting the intelligent monitoring system to read data, actions such as drilling, grouting and the like are identified, and the calculated indexes are used for comprehensively judging that 18:21 is suspected to find overflow, and an alarm is sent. The alarm time is 6 minutes earlier than manual work, so that time is striven for effectively controlling the bottom hole pressure, and well control risks which can occur are successfully avoided.

In addition, compared with the existing logging tripping monitoring which completely depends on manpower, the invention can realize remote intelligent monitoring, has stronger auxiliary judging capability even in high-risk areas, has lower cost, saves manpower, improves working environment and improves working efficiency.

Taking Chongyu regional risk well as an example, assume a well with a design depth of 6000 meters, the whole well is drilled for 30 times, and the average time for each drilling is 1.5 days. By adopting the method as an auxiliary discrimination means, the artificial fatigue can be effectively reduced, the working efficiency is improved, the man-hour of manual rotation is saved, and one well can save the man-hour of manual work for 45 days.

In summary, the beneficial effects of the present invention include at least one of the following:

Although the present invention has been described above with reference to the exemplary embodiments and the accompanying drawings, it should be apparent to those of ordinary skill in the art that various modifications can be made to the above-described embodiments without departing from the spirit and scope of the claims.

Claims

1. An intelligent monitoring method for overflow and lost circulation for logging operation is characterized by comprising the following steps:

RIHI＝ΔV _p -ΔV _d1 (1)

ROHI＝ΔV _p +ΔV _d2 (2)

2. The intelligent monitoring method for overflow and lost circulation for logging operations according to claim 1, wherein X is 1-100 and Y is 1-100.

3. The intelligent monitoring method for overflow and lost circulation for logging operations according to claim 1, wherein the upper time limit T _c 100 s-180 s.

4. The intelligent monitoring method for overflow and lost circulation for logging operations of claim 1, wherein the step of identifying the state of motion of the drilling tool comprises:

acquiring the real-time bit position and time of a drill string;

5. The intelligent monitoring method for overflow and lost circulation for logging as defined in claim 4, wherein the step of obtaining the volume change of the drilling tool in the well or the volume change of the drilling tool out of the well comprises the following steps:

6. The intelligent monitoring method for overflow and lost circulation for logging operations according to claim 5, wherein the cross-sectional area of the drilling tool in the well is obtained by calculation according to formula (3) in the whole process of drilling; in the whole process of tripping, calculating to obtain the cross-sectional area of the drilling tool in the well through a drill (4);

the formula (3) and the formula (4) are:

7. The intelligent monitoring method for overflow and lost circulation for logging operations of claim 5, wherein the step of obtaining the actual volume change of the drilling fluid comprises:

acquiring the volume of a circulating total pool at different moments;

8. The intelligent monitoring method of flooding and lost circulation for well logging operations of claim 7, wherein the step of determining said upper limit of rate of change comprises:

for the volume change speed of drilling fluid

Tracking the values of (2) to obtain a probability distribution density curve;

9. The intelligent monitoring method of flooding and lost circulation for well logging operations of claim 7, wherein the step of determining the normal loss of drilling fluid comprises:

10. The intelligent monitoring method of overflow and lost circulation for logging operations of claim 1, further comprising:

11. The intelligent monitoring method of flooding and lost circulation for logging operations of claim 10, further comprising:

12. The intelligent monitoring method of overflow and lost circulation for logging operations of claim 1, further comprising:

13. An intelligent monitoring system for overflow and lost circulation for logging operation is characterized in that the intelligent monitoring system comprises a drilling tool motion state identification module, an overflow and lost circulation monitoring parameter acquisition module, a drilling tool static monitoring module, an X-column distance overflow monitoring module, an X-column distance lost circulation monitoring module, a total pool volume change trend determination module and an alarm module,

the drilling tool static monitoring module is connected with the drilling tool motion state module and the overflow and lost circulation monitoring parameter acquisition module, and is configured to monitor the drilling tool static state and the outlet flow in the tripping process, and if the drilling tool static observation time T is _o Greater than the upper time limit T _c Outputting a drill-down overflow alarm signal if the outlet flow is not 0;

14. The intelligent monitoring system for overflow and lost circulation for logging operations of claim 13, further comprising a grouting trigger monitoring module, wherein the grouting trigger monitoring module is respectively connected with the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module, and is configured to control the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module to respectively acquire overflow and lost circulation monitoring parameters and calculate drilling tool distance overflow and lost circulation judgment before and after grouting to judge whether overflow and lost circulation occur or not when grouting actions occur in a tripping process;

15. The intelligent monitoring system for well logging operations of claim 13, further comprising a manual monitoring module connected to the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module and configured to control the X-column distance overflow monitoring module and the X-column distance lost circulation monitoring module to acquire and calculate overflow and lost circulation monitoring parameters between a current drilling tool depth and a previous monitoring point to determine whether overflow and lost circulation occurs.

16. The intelligent monitoring system for overflow and lost circulation for logging operations of claim 13, further comprising an outlet flow monitoring module, wherein the outlet flow monitoring module is respectively connected with the drilling tool motion state identification module and the overflow and lost circulation monitoring parameter acquisition module, and is configured to monitor and judge whether the outlet flow is not 0 when the drilling tool motion state is drilling and intermittent grouting action exists, and if so, output a drilling overflow alarm signal.