CN104564019A - Method for monitoring friction drag and torque of large-displacement well - Google Patents
Method for monitoring friction drag and torque of large-displacement well Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000006073 displacement reaction Methods 0.000 title abstract 4
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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Abstract
The invention provides a method for monitoring the friction drag and the torque of a large-displacement well. The method comprises the steps of firstly, building a friction drag and torque mechanical analysis model of the large-displacement well, and compiling an analysis program or analysis software; secondly, carrying out friction drag and torque simulation analysis computing under a track section designing condition; compiling monitoring route maps of drilling tool feed-off hook load, drilling tool lift-up hook load and idling lift-off-well bottom hook load under different friction drag coefficient conditions and route maps of rotary drilling torque along with well depth; recording the drilling tool feed-off hook load, the drilling tool lift-up hook load, the idling lift-off-well bottom hook load and the rotary drilling torque of actual drilling during site operation; finally, describing data under actual drilling record on the route maps, and comparing the data with predicted values under different friction drag coefficients and analyzing. According to the method for monitoring the friction drag and the torque of the large-displacement well, provided by the invention, the reason that causes the friction drag and the torque is deeply analyzed through real-time monitoring on the friction drag and the torque, and meanwhile, response analysis is carried out on the borehole cleanliness degree, the borehole quality, the drilling parameters, a bottom drilling tool combination, the drilling fluid performance change, the use of an anti-friction and torque-reducing tool and the like.
Description
Technical field
The present invention relates to a kind of extended reach well drag and torque monitoring method of wellbore construction monitoring technical field.
Background technology
In recent years, along with the mankind are to the continuous expansion of gas and oil in sea exploitation scale, bore extended reach well quantity with marine drilling platform and man-made island to get more and more, and along with the continuous increase of extended reach well horizontal movement, drag and torque problem has become the restraining factors that extended reach well is given prominence to the most, and the monitor and forecast of drag and torque is the key being successfully drilled to a bite extended reach well.
The analysis of current drag and torque still rests on forecast period, and the comparative analysis of the feasibility analysis of the analysis on Necessity of drilling equipment upgrading and goals research before being mainly used in Oil/gas Well construction, Oil/gas Well construction, technical measures and scheme and preferred etc.Still immature for the drag and torque Real-Time Monitoring in drilling course.
Summary of the invention
The object of the invention is in view of analyzing Problems existing above, the extended reach well drag and torque monitoring method of the drag and torque Real-Time Monitoring in a kind of drilling course is provided.Utilize the method, response analysis can be carried out to the use etc. that the instrument of turning round falls in well clean-up performance, hole quality, drilling parameter, Bottom Hole Assembly (BHA), property of drilling fluid change, antifriction, and then the generation of prevention major accident, for the construction of well to be drilled and the construction of follow-up extended reach well provide guidance, ensure that the success of whole extended reach well drilling well is implemented smoothly.
Overall technological scheme of the present invention is:
First, set up extended reach well drag and torque and monitor comprehensive mechanical model, establishment extended reach well drag and torque routine analyzer or software;
Secondly, the drag and torque sunykatuib analysis carried out under designed path section condition calculates;
According to second step result of calculation, transfer under working out the different coefficient of friction resistance condition drilling tool hook load, on carry drilling tool hook load, the monitoring route map of idle running lift-off shaft bottom hook load and the rotary drilling moment of torsion route map with well depth;
In site operation process, by column record real bore transfer drilling tool hook load, on carry drilling tool hook load, idle running lift-off shaft bottom hook load and rotary drilling moment of torsion;
Finally, be depicted in boring the data recorded in fact on route map, and the predicted value under different frictional resistance system condition is analyzed.
Above-mentioned extended reach well drag and torque monitoring method specifically adopts following steps:
(1) extended reach well drag and torque mechanics collective model is set up, establishment extended reach well drag and torque routine analyzer or software;
(2) utilize calculation procedure, the drag and torque analog computation carried out under designed path section condition is analyzed;
(3) work out respectively in sleeve pipe under coefficient of friction resistance condition different from Open-Hole Section on carry drilling tool, transfer drilling tool, the hook load in lift-off shaft bottom of dallying monitors route map and rotary drilling moment of torsion with the route map of well depth;
(4) in site operation process, with each column for unit, recording occurring continuously connects at every turn and column carries drilling tool, transfer drilling tool, idle running lift-off shaft bottom time hook load and lift-off DTOR; Record rotary drilling torque value under different well depth condition;
(5) recorded value to be depicted in (3) hook load monitoring route map and rotary drilling moment of torsion with on the route map of well depth, real time contrast's actual monitoring curve and theoretical curves;
(6) check and revise the coefficient of friction resistance, rationally determining the coefficient of friction resistance between drill string and well; According to the curve that (5) obtain, the real position of boring in monitoring curve and theoretical monitoring curve of comparative analysis, corresponding to different well depth place, the coefficient of friction resistance under actual lower driller's condition all can go out by inversion reckoning; Meanwhile, trip-out operating mode and rotary drilling operating mode all can extrapolate the coefficient of friction resistance of full well with similar inversion method.
Above-mentioned steps also comprises:
(7) predict that the torque value of drilling well section, Value of Friction Loss and hook load change curve are treated in bottom, formulate related technical measures.
Extended reach well drag and torque mechanics collective model of setting up described in such scheme is that comprehensive following well section drill string analytical model basis is set up, and comprising:
straight well section drill pipe section, the soft rod model of extended reach well is set up in the impact ignoring drill string stiffness;
inclination section adopts rigid model;
steady tilted section adopts soft rod model;
heavy weight drill pipe section, extended reach well rigid model is set up in the impact ignoring drill string stiffness;
bottomhole assembly section sets up Continuous Beam Model.
Advantage of the present invention is:
Provide drag and torque method of real-time for boring extended reach well, compare with traditional drag and torque forecast analysis, the method has widened the range of application of drag and torque.In drilling process, carried and rotary drilling moment of torsion by Real-Time Monitoring record hook hook, be analyzed with predicted value, the response analysis of well clean-up performance, hole quality, drilling parameter, Bottom Hole Assembly (BHA), property of drilling fluid, antifriction being fallen to the use of the instrument of turning round etc. can be realized.For ensureing that extended reach well safe construction provides the most direct foundation, thus being filled with new engineering significance for the purposes of drag and torque, the experience coefficient of friction resistance can being provided for the subsequent construction of same district block well.
Accompanying drawing explanation
Fig. 1 extended reach well drag and torque analytical model figure
Fig. 2 extended reach well two opens frictional resistance route map, wherein:
The coefficient of friction resistance 0.10 in CSG0.10OPH0.10Trip in---sleeve pipe, the bore hole coefficient of friction resistance 0.10, lower brill hook load, kN;
The coefficient of friction resistance 0.15 in CSG0.15OPH0.20Trip in---sleeve pipe, the bore hole coefficient of friction resistance 0.20, lower brill hook load, kN;
The coefficient of friction resistance 0.25 in CSG0.25OPH0.30Trip in---sleeve pipe, the bore hole coefficient of friction resistance 0.30, lower brill hook load, kN;
The coefficient of friction resistance 0.30 in CSG0.30OPH0.35Trip in---sleeve pipe, the bore hole coefficient of friction resistance 0.35, lower brill hook load, kN;
The coefficient of friction resistance 0.10 in CSG0.10OPH0.10Trip Out---sleeve pipe, the bore hole coefficient of friction resistance 0.10, trip-out hook load, kN;
The coefficient of friction resistance 0.15 in CSG0.15OPH0.20Trip Out---sleeve pipe, the bore hole coefficient of friction resistance 0.20, trip-out hook load, kN;
The coefficient of friction resistance 0.25 in CSG0.25OPH0.30Trip Out---sleeve pipe, the bore hole coefficient of friction resistance 0.30, trip-out hook load, kN;
The coefficient of friction resistance 0.30 in CSG0.30OPH0.35Trip Out---sleeve pipe, the bore hole coefficient of friction resistance 0.35, trip-out hook load, kN;
Rotate Off Bottom Hook Load---lift-off shaft bottom hook load, kN.
Fig. 3 extended reach well two opens moment of torsion route map, wherein:
The coefficient of friction resistance 0.10 in CSG0.10OPH0.10---sleeve pipe, the bore hole coefficient of friction resistance 0.10, rotary drilling surface torque, N.m;
The coefficient of friction resistance 0.10 in CSG0.10OPH0.15---sleeve pipe, the bore hole coefficient of friction resistance 0.15, rotary drilling surface torque, N.m;
The coefficient of friction resistance 0.15 in CSG0.15OPH0.20---sleeve pipe, the bore hole coefficient of friction resistance 0.20, rotary drilling surface torque, N.m;
The coefficient of friction resistance 0.20 in CSG0.20OPH0.25---sleeve pipe, the bore hole coefficient of friction resistance 0.25, rotary drilling surface torque, N.m;
The coefficient of friction resistance 0.25 in CSG0.25OPH0.30---sleeve pipe, the bore hole coefficient of friction resistance 0.30, rotary drilling surface torque, N.m;
The coefficient of friction resistance 0.30 in CSG0.30OPH0.35---sleeve pipe, the bore hole coefficient of friction resistance 0.35, rotary drilling surface torque, N.m;
Fig. 4 extended reach well two opens frictional resistance Real-Time Monitoring figure, wherein:
Hook load is bored, kN under the real brill of Actual Tripping In Hook Load---;
Actual Tripping Out Hook Load---is real bores trip-out hook load, kN;
Actual Rotate Off Hook Load---is real bores lift-off shaft bottom hook load, kN.
Fig. 5 extended reach well two opens moment of torsion Real-Time Monitoring figure, wherein:
Actual Rotate On---is real bores rotary drilling surface torque, N.m;
Actual Rotate Off---actual lift-off shaft bottom surface torque, N.m.
Detailed description of the invention
Be described further below in conjunction with accompanying drawing 1 ~ 5 pair of the design's method.
(1) for the feature of extended reach well, the calculating of extended reach well string friction moment of torsion is divided into five parts, and sets up corresponding mechanical model:
straight well section drill pipe section, because hole curvature change is little, the soft rod model of extended reach well is set up in the impact ignoring drill string stiffness;
inclination section hole curvature is comparatively large, and drill string easily bends and causes larger flexural stress, in order to make calculating more accurate, adopts rigid model;
steady tilted section, hole curvature change is little, and drill string is generally the little drilling rod of bending rigidity, therefore adopts soft rod model;
heavy weight drill pipe section, extended reach well rigid model is set up in the impact ignoring drill string stiffness;
bottomhole assembly section, consider that Continuous Beam Model (as Fig. 1) is set up in the effect of stabilizer, after establishing above-mentioned drag and torque mechanics collective model, just can adopt different computation models to different drill column structure sections, carry out numerical computations programming, form ripe calculation procedure or software;
(2) utilize the calculation procedure write or select existing software for calculation, carrying out drag and torque analog computation analysis;
(3) calculate respectively in sleeve pipe under coefficient of friction resistance condition different from Open-Hole Section on carry drilling tool, the hook load of transferring drilling tool monitors route map and (as Fig. 2, calculates the coefficient of friction resistance 0.1 in sleeve pipe respectively, the coefficient of friction resistance 0.1 in bore hole; The coefficient of friction resistance 0.15 in sleeve pipe, the coefficient of friction resistance 0.2 in bore hole; The coefficient of friction resistance 0.25 in sleeve pipe, the coefficient of friction resistance 0.3 in bore hole; The coefficient of friction resistance 0.3 in sleeve pipe, in bore hole, the trip-out of the coefficient of friction resistance 0.35 correspondence and lower brill hook carry) and rotary drilling moment of torsion route map (as Fig. 3, calculate the coefficient of friction resistance 0.1 in sleeve pipe respectively, the coefficient of friction resistance 0.1 in bore hole; The coefficient of friction resistance 0.1 in sleeve pipe, the coefficient of friction resistance 0.15 in bore hole; The coefficient of friction resistance 0.15 in sleeve pipe, the coefficient of friction resistance 0.2 in bore hole; The coefficient of friction resistance 0.2 in sleeve pipe, the coefficient of friction resistance 0.25 in bore hole; The coefficient of friction resistance 0.25 in sleeve pipe, the coefficient of friction resistance 0.3 in bore hole; The coefficient of friction resistance 0.3 in sleeve pipe, the rotary drilling torque value of the coefficient of friction resistance 0.35 correspondence in bore hole);
(4) with each column for unit, carry drilling tool on when recording occurring continuously connects column at every turn, transfer drilling tool, hook load when rotating lift-off shaft bottom and lift-off DTOR; Record rotary drilling torque value under different well depth condition;
(5) by record and carry drilling tool hook hook and carry and transfer drilling tool hook hook and carry value and to mark in (3) on frictional resistance monitoring route map (as Fig. 4), moment of torsion during rotation lift-off shaft bottom and rotary drilling torque value are marked on the moment of torsion route map in (3) (as Fig. 5), real time contrast's actual monitoring curve and theoretical curves;
(6) check and revise the coefficient of friction resistance, rationally determining the coefficient of friction resistance between drill string and well; According to the curve that (5) obtain, the real position of boring in monitoring curve and theoretical monitoring curve of comparative analysis, as well depth 1800m place in Fig. 4, real bore lower bore hook load curve and theory under bore the hook load curve (coefficient of friction resistance 0.15 in sleeve pipe, the bore hole coefficient of friction resistance 0.20) curve close to overlap, can the coefficient of friction resistance that goes out under the actual lower driller's condition in well depth 1800m place of inversion reckoning be just: in sleeve pipe 0.15, in bore hole 0.20, corresponding to different well depth place, the coefficient of friction resistance under actual lower driller's condition all can go out by inversion reckoning; Meanwhile, trip-out operating mode and rotary drilling operating mode all can extrapolate the corresponding coefficient of friction resistance with similar inversion method;
(7) predict that the torque value of drilling well section, Value of Friction Loss and hook load change curve are treated in bottom, formulate related technical measures.
Claims (4)
1. an extended reach well drag and torque monitoring method, is characterized in that:
First, set up extended reach well drag and torque and monitor comprehensive mechanical model, establishment extended reach well drag and torque routine analyzer or software;
Secondly, the drag and torque sunykatuib analysis carried out under designed path section condition calculates;
According to second step result of calculation, transfer under working out the different coefficient of friction resistance condition drilling tool hook load, on carry drilling tool hook load, the monitoring route map of idle running lift-off shaft bottom hook load and the rotary drilling moment of torsion route map with well depth;
In site operation process, by column record real bore transfer drilling tool hook load, on carry drilling tool hook load, idle running lift-off shaft bottom hook load and rotary drilling moment of torsion;
Finally, be depicted in boring the data recorded in fact on route map, and the predicted value under different frictional resistance system condition is analyzed.
2. extended reach well drag and torque monitoring method according to claim 1, is characterized in that specifically adopting following steps:
(1) extended reach well drag and torque mechanics collective model is set up, establishment extended reach well drag and torque routine analyzer or software;
(2) utilize calculation procedure, the drag and torque analog computation carried out under designed path section condition is analyzed;
(3) work out respectively in sleeve pipe under coefficient of friction resistance condition different from Open-Hole Section on carry drilling tool, transfer drilling tool, the hook load in lift-off shaft bottom of dallying monitors route map and rotary drilling moment of torsion with the route map of well depth;
(4) in site operation process, with each column for unit, recording occurring continuously connects at every turn and column carries drilling tool, transfer drilling tool, idle running lift-off shaft bottom time hook load and lift-off DTOR; Record rotary drilling torque value under different well depth condition;
(5) recorded value to be depicted in (3) hook load monitoring route map and rotary drilling moment of torsion with on the route map of well depth, real time contrast's actual monitoring curve and theoretical curves;
(6) check and revise the coefficient of friction resistance, rationally determining the coefficient of friction resistance between drill string and well; According to the curve that (5) obtain, the real position of boring in monitoring curve and theoretical monitoring curve of comparative analysis, corresponding to different well depth place, the coefficient of friction resistance under actual lower driller's condition all can go out by inversion reckoning; Meanwhile, trip-out operating mode and rotary drilling operating mode all can extrapolate the coefficient of friction resistance of full well with similar inversion method.
3. extended reach well drag and torque monitoring method according to claim 2, it is characterized in that, described step also comprises:
(7) predict that the torque value of drilling well section, Value of Friction Loss and hook load change curve are treated in bottom, formulate related technical measures.
4. the extended reach well drag and torque monitoring method according to claim 1 or 2,3, is characterized in that described extended reach well drag and torque mechanics collective model of setting up is that comprehensive following well section drill string analytical model basis is set up, comprising:
straight well section drill pipe section, the soft rod model of extended reach well is set up in the impact ignoring drill string stiffness;
inclination section adopts rigid model;
steady tilted section adopts soft rod model;
heavy weight drill pipe section, extended reach well rigid model is set up in the impact ignoring drill string stiffness;
bottomhole assembly section sets up Continuous Beam Model.
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| CN109779607A (en) * | 2018-12-29 | 2019-05-21 | 长江大学 | A kind of Frictional Drag of Casing Running coefficient based on hole diameter degree of irregularity determines method and system |
| CN110457866A (en) * | 2019-08-31 | 2019-11-15 | 中国石油集团川庆钻探工程有限公司 | Friction resistance prediction method and friction resistance reduction method in whole sliding drilling process |
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| CN111948020A (en) * | 2020-06-12 | 2020-11-17 | 中国石油大学(北京) | Complex stratum directional well pipe column running capability evaluation method based on virtual contact point |
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