CN110485992B - Method for calculating oil gas channeling speed for well drilling and completion - Google Patents
Method for calculating oil gas channeling speed for well drilling and completion Download PDFInfo
- Publication number
- CN110485992B CN110485992B CN201810454111.8A CN201810454111A CN110485992B CN 110485992 B CN110485992 B CN 110485992B CN 201810454111 A CN201810454111 A CN 201810454111A CN 110485992 B CN110485992 B CN 110485992B
- Authority
- CN
- China
- Prior art keywords
- gas
- oil
- drilling
- well
- calculating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 65
- 230000005465 channeling Effects 0.000 title claims abstract description 38
- 238000004364 calculation method Methods 0.000 claims abstract description 45
- 238000006073 displacement reaction Methods 0.000 claims abstract description 21
- 230000000694 effects Effects 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 claims abstract description 5
- 239000004215 Carbon black (E152) Substances 0.000 claims description 42
- 229930195733 hydrocarbon Natural products 0.000 claims description 37
- 150000002430 hydrocarbons Chemical class 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 12
- 235000001287 Guettarda speciosa Nutrition 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 230000007774 longterm Effects 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 244000061520 Angelica archangelica Species 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 13
- 239000003208 petroleum Substances 0.000 abstract description 3
- 238000007796 conventional method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 106
- 230000007775 late Effects 0.000 description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 230000003068 static effect Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 241000125175 Angelica Species 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000009472 formulation Methods 0.000 description 2
- 230000009545 invasion Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/02—Agriculture; Fishing; Forestry; Mining
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Business, Economics & Management (AREA)
- Marine Sciences & Fisheries (AREA)
- Economics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Agronomy & Crop Science (AREA)
- Animal Husbandry (AREA)
- Environmental & Geological Engineering (AREA)
- Geophysics (AREA)
- Health & Medical Sciences (AREA)
- Fluid Mechanics (AREA)
- General Health & Medical Sciences (AREA)
- Human Resources & Organizations (AREA)
- Marketing (AREA)
- Primary Health Care (AREA)
- Strategic Management (AREA)
- Tourism & Hospitality (AREA)
- General Business, Economics & Management (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a method for calculating the upward channeling speed of oil gas for well drilling and completion, and belongs to the technical field of petroleum drilling and logging. According to the method, according to the displacement effect of a drilling tool, the volume of annular drilling fluid below a gas cap after closed displacement and drilling is subjected to volume reduction from bottom to top in an empty shaft, the position of an oil-gas top boundary before displacement is obtained, and then the oil-gas upward-flowing speed is calculated by utilizing the position of the oil-gas top boundary. Compared with the conventional method, the calculation result of the method is closer to the actual value, particularly the calculation precision of the oil-gas upward-fleeing speed under the working condition of the short rise of the deep well is greatly improved, a more scientific and accurate reference basis is provided for the next construction on site, and the underground safety of the subsequent construction is ensured.
Description
Technical Field
The invention belongs to the technical field of petroleum drilling and logging, and particularly relates to a method for calculating the upward channeling speed of oil gas for well drilling and completion.
Background
In the process of oil and gas exploration and development, the oil and gas channeling speed is not only a reaction of the activity degree of an oil and gas reservoir, but also one of key indexes of well control of the well drilling and completion, and the scientific selection of the field gas channeling speed calculation method has important significance on the well drilling and completion construction efficiency and the well control safety. The existing method for calculating the oil and gas channeling speed mainly comprises a late arrival time method and a volume method, and in addition, a calculation method for optimizing and improving the two methods is also provided, wherein the late arrival time method and the volume method have certain guidance in a shallow well with a simple well body structure, but in a deep well with a complex structure, the calculation result is often greatly different from the actual situation under the influences of factors such as unstable pump displacement, drilling tool displacement action, selection of an all-hydrocarbon starting point, a logging pipeline and the like.
Specifically, in the prior art, patent CN106339549A uses the length of gas-invaded drilling fluid in the wellbore to reverse the gas channeling speed, and since the gas in the reservoir at the bottom of the well is continuously invaded into the wellbore in the process of after-effect removal, the method is not very easy to operate in the field; the CN107066768A patent considers the influence of factors of an all-hydrocarbon starting point, a returning well depth, a static time and drill tool displacement, but the method is still based on a late arrival time method, the specific selection of the starting point, the influence of displacement instability on the late arrival time, well logging pipeline delay and the like are not considered, and a certain error still exists between a calculation result and an actual value; the document 'deep well gas channeling speed calculation by a discrete slippage lag time method' considers the oil phase and gas phase slippage effects, and calculates the oil gas channeling speed by adopting the discrete slippage lag time method, but the method does not consider the influences of drilling tool displacement, late arrival time, full hydrocarbon starting point selection and the like, and finally influences the calculation result; the literature, namely the practical calculation method for the upward oil and gas fleeing speed, considers the influence of the water feeding efficiency of a pump and the displacement of a drilling tool on the gas fleeing speed, corrects the current late time method, and the calculation result is more reasonable. However, the technology does not consider the influences of selection of an all-hydrocarbon starting point, delay of a logging pipeline, effective discharge time, homing well depth and the like, and a certain error still exists in a calculation result; the document "practical method for calculating the upward gas-oil channeling speed" is a relative time method, which is used for comparing polluted well sections with uncontaminated well sections in drilling fluid circulation to reversely deduce the gas channeling speed, and is suitable for being used under the condition of less gas invasion. However, the method does not consider the influences of selection of an all-hydrocarbon starting point, delay of a logging pipeline, standing time, homing well depth and the like, and particularly has certain problems in judgment of polluted well sections in a stratum with serious gas invasion, and the field operability is not strong; the literature 'discussion of calculating the oil and gas channeling speed by using an actual measurement late time method' is the actual measurement late time method, calcium carbide is adopted to accurately measure late time, meanwhile, the selection of a late effect starting point is regulated, and the calculation of the application display of the Tuhai multi-hole well is more accurate than that of a theoretical late time method. However, the method does not consider the influence of factors such as drilling tool replacement, logging pipeline delay, returning well depth, late arrival time and the like, and a calculated value still has certain error; the literature, namely the accurate calculation method of the oil and gas channeling speed, considers the influence of the displacement and the rest time of the drilling tool on the gas channeling speed, and has a good field application effect. However, the influence of factors such as water feeding efficiency of a pump, delay of a logging pipeline, well returning depth and the like is not considered in the technology, and a certain error still exists in a calculation result; the literature 'modification of an oil-gas upward-flowing speed calculation method' corrects the dead time in a late time method, eliminates the slippage effect influence of part of gas relative to drilling fluid, and has a more reasonable calculation result. However, the method does not consider the influence of factors such as drilling tool replacement and drainage, pump water feeding efficiency, logging pipeline delay, after-effect initial point selection, well homing depth and the like, and a final calculation result still has a certain error.
In conclusion, although individual influence factors are considered in the prior art, the prior art is still incomplete, and a calculated result still has certain errors and cannot well guide field drilling construction. Therefore, all the gas channeling speed influence factors need to be comprehensively considered, a set of reasonable gas channeling speed calculation method needs to be established, and site construction and well control work can be scientifically and reasonably guided.
Natural gas is used as an important green clean energy source, and the future demand prospect is very wide. With the continuous development of oil and gas development technology, deep oil and gas and shale gas resources become new development hotspots, however, in the drilling and completion construction process, after a reservoir containing natural gas is drilled, oil and gas upward-channeling speed testing must be carried out according to well control management regulations before tripping, if the oil and gas upward-channeling speed is not accurately calculated, on one hand, serious well control accidents such as well kick and blowout can be caused, on the other hand, reservoir pollution caused by leakage due to blind improvement of drilling fluid density can be caused, and on the other hand, measures such as cyclic drainage aftereffect and long-term static testing of oil and gas upward-channeling speed can be adopted for verification due to the fact that the requirement of well control oil and gas upward-channeling speed is not met, so that a great amount of precious time is wasted. Therefore, the selection of a proper gas channeling speed calculation method has important significance for improving the safety and the efficiency of drilling construction.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a method for calculating the oil-gas upward-flowing speed for well drilling and completion, which can accurately and reasonably calculate the oil-gas upward-flowing speed in a shaft, provide scientific basis for the formulation of well drilling construction measures and strengthen the well control safety.
The invention is realized by the following technical scheme:
according to the displacement effect of a drilling tool, the volume of annular drilling fluid below a gas cap after closed displacement and drilling is reduced from bottom to top in an empty shaft to obtain the position of an oil-gas top boundary before displacement, and then the oil-gas top boundary position is used for calculating to obtain the oil-gas upward displacement speed.
The method comprises the following steps:
(1) collecting well body structure and drilling tool structure parameters;
(2) acquiring the water feeding efficiency of each mud pump; testing the aftereffect delay time of the logging instrument;
(3) determining an after-effect total hydrocarbon starting point in the after-effect elimination process;
(4) determining the gas channeling time;
(5) determining the homing well depth;
(6) carrying out volume reduction on the volume of annular drilling fluid below the gas cap after the drilling of the closed row in the hollow shaft from bottom to top to obtain the oil-gas top boundary position before the displacement;
(7) and calculating the oil-gas upward channeling speed by using the oil-gas top boundary position.
The parameters acquired in the step (1) comprise: the inner diameter of the casing pipe and the outer diameter of the drill pipe.
The operation of the step (3) comprises:
selecting 2 times of the reference value as a post-effect total hydrocarbon starting point in the post-effect discharging process;
the reference value is the total hydrocarbon value displayed by the logging instrument.
The operation of the step (4) comprises the following steps:
counting the stationary time t after stopping the pumpQuietTime t from starting pump to coming back to effectRow boardAnd adding the two to obtain the gas upward-fleeing time.
The operation of the step (5) comprises the following steps:
in the field drilling process, if the first hydrocarbon reservoir has obvious single peak display or the first hydrocarbon reservoir finds multi-peak display in other hydrocarbon reservoirs, the top position of the first hydrocarbon reservoir is taken as the homing well depth HChinese angelica root-bark(ii) a If the first hydrocarbon reservoir has no single peak display after drilling through or no obvious single peak display after cyclic drainage after long-term rest, the top positions of other more active hydrocarbon reservoirs are taken as the homing well depth HChinese angelica root-bark。
The operation of the step (6) comprises the following steps:
the volume of the annular drilling fluid below the gas cap after the closed-row drilling is reduced from bottom to top in the hollow shaft by using the formula (1)Originally, the oil-gas top boundary position before displacement is obtained, wherein the oil-gas top boundary position is the height H of a gas top from the well bottomg：
Wherein i represents that the gas cap is positioned in the ith section of the casing before drilling, and i is more than or equal to 1;
n represents the number of times of calculating the volume of the annular space in a segmented manner in the calculation process, and n is more than or equal to 1;
H1、H2to HiThe length of each section of the same type in the well before drilling is expressed in m;
S1、S2to SiThe annular cross-sectional area of each section of the same type in the well before drilling is in the unit of m2；
VRing (C)The annular volume of the drilling fluid after drilling is in m3；
S1、S2To Si、VRing (C)The method is obtained by calculating the inner diameter of the casing and the outer diameter of the drill rod collected in the step (1);
n is the total pump stroke number when the circulation has aftereffect, and the unit is stroke; subtracting the aftereffect delay time of the logging instrument obtained in the step (2) from the time corresponding to the aftereffect total hydrocarbon starting point determined in the step (3) to obtain the time after the reversing, wherein the sum of the stroke number of the pump corresponding to the time after the reversing is N;
q is the volume per stroke in m3Punching; and (3) multiplying the water feeding theoretical value of each mud pump by the water feeding efficiency of the mud pump obtained in the step (2) to obtain Q.
The operation of the step (7) comprises the following steps:
calculating the upward oil-gas fleeing speed V by using the formula (2)Gas channeling：
HBIn units of m, the depth of the bottom hole.
Compared with the prior art, the invention has the beneficial effects that:
compared with the conventional method, the method disclosed by the invention has the advantages that the calculation result is closer to the actual value, particularly, the calculation precision of the oil-gas upward-channeling speed under the short-rise working condition of the deep well is greatly improved, a more scientific and accurate reference basis is provided for the next construction on site, and the underground safety of subsequent construction is ensured.
Drawings
FIG. 1 shows the bit above the gas cap before the drill is run
FIG. 2 the bit is below the gas cap before the drill is run
Fig. 3 shows a state in which the drilling gas is discharged.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
the invention firstly determines the factors influencing the calculation of the gas channeling speed: the main factors influencing the calculation of the oil and gas channeling speed on site comprise: the method comprises the following steps of pump water feeding efficiency, selection of a post-effect starting point, returning well depth, oil and gas channeling time, logging instrument pipeline delay and drilling tool replacement and discharge factors.
After all the influence factors are considered, the method for calculating the replacement liquid level reset gas channeling speed is established, the field operability is strong, and the calculation result is closer to the actual value.
The liquid replacement surface resetting gas channeling speed calculation method comprises the following steps of:
(1) the specific parameters of the well structure and the drilling tool structure are collected, and the specific collected parameters comprise the following parameters such as inner diameter, outer diameter, length and the like: the inner diameter of the casing and the outer diameter of the drill rod are used for calculating the annular volume when a drilling tool is arranged and not arranged in the following formula, such as V in the formulaRing (C)And Si。
(2) The method is a general method in the field of petroleum drilling, wherein the water feeding efficiency is represented in Q discharge capacity, and the Q value is obtained by multiplying the theoretical water feeding efficiency of the slurry pump by the water feeding efficiency;
testing the aftereffect delay time of the logging instrument: a methane sample is added at the detection device by a field logging technician and the scope detects when the output indicates methane is detected, this time being referred to as the logging tool pipeline delay time.
(3) The starting point of the after-effect total hydrocarbon in the after-effect discharging process is selected to be about 2 times of the reference value.
The reference value refers to the total hydrocarbon value displayed by the logging instrument, the value is well known in the field of well drilling and logging, and the starting point is mainly used for determining the selection time and t of the accumulated pump impulse number N in a formulaRow boardDetermining time, i.e. after determining the starting point, subtracting the pipeline delay time from the corresponding time, and accumulating the pump charges N and t corresponding to the time after the backward movementQuietThe time parameter is substituted into a formula for calculation.
(4) The gas up-flow time is the sum of the rest time after stopping the pump and the time from starting the pump to the effective period after the pump is started, namely't' in the following formulaQuiet+tRow board”。
(5) And determining the homing well depth, and for the condition that the multi-hydrocarbon layer aftereffect multi-peak display is not obvious, determining whether the top position of the first hydrocarbon layer is used as the homing well depth according to the actual condition.
For the condition that multiple peaks are obviously displayed, the definition of the phenomenon that the gas logging value is obviously increased on the basis of the background of the basic value is defined according to the 3.4 gas logging abnormity explained in the SY/T5788.2-2008 oil gas exploration gas logging specification in the current Chinese oil and gas industry standard, and if other horizons are selected as the homing well depth, the caused error is large, the calculation result of the gas channeling speed is influenced, and the field construction cannot be guided.
If a first hydrocarbon reservoir has obvious single peak display in the field drilling process or can also find the multi-peak display of the first hydrocarbon reservoir when drilling into other hydrocarbon reservoirs, even if the peak value of the first hydrocarbon reservoir is smaller than the display of other hydrocarbon reservoirs, the measured total hydrocarbon value is easily more than 2 times of the reference value of the circulating total hydrocarbon when the oil and gas of the first hydrocarbon reservoir returns out of a wellhead after long-term static aggregation, so the first hydrocarbon reservoir is treated as the homing well depth in the situation. If the first hydrocarbon reservoir has no single peak after drilling through, or the cyclic drainage aftereffect is not obviously displayed after long-term rest, other more active hydrocarbon reservoirs can be selected as the homing well depth.
(6) And determining the positions of the drill bit before the drill is drilled and the gas cap after the drill is drilled, comparing the volume of the drilling fluid in the lower annulus of the gas cap after the drill is drilled with the volume of the well bore in the lower annulus of the drill bit before the drill is drilled except that the drill bit is positioned above the gas cap during long tripping, and if the volume of the drilling fluid in the lower annulus of the gas cap is smaller than that of the well bore in the lower annulus of the drill bit before the drill is drilled, judging that the drill bit before the drill is drilled is positioned above the gas cap, otherwise, judging that the drill bit is positioned below the gas cap. Fig. 1, 2 and 3 show a state in which a drill bit before drilling is located above a gas cap, a drill bit before drilling is located below the gas cap, and drilling gas is displaced, respectively, and Hg in fig. 1, 2 and 3 represents a height of the gas cap from a bottom hole before drilling, and is expressed in m; hChinese angelica root-barkRepresenting the homing well depth in m; hBRepresents the bottom hole depth in m; h1、H2…HiThe lengths of the sections of the same type in the well before drilling are respectively in the unit of m.
Regardless of the location of the bit and the gas cap, H is determined using equation (1)g. The positions of the drill bit and the gas cap after upward channeling are determined before the drill is drilled, so that the position of gas is determined during calculation, parameters required for calculation are pre-determined, calculation of a real formula is not influenced, only if the drill bit is determined to be above the gas cap, the annular volume of the drill rod and the casing pipe cannot be used during calculation, and if the drill bit is below the gas cap, the annular volume of the drill rod and the casing pipe needs to be used.
(7) According to the drill replacing and discharging function, the state reduction before drilling is carried out on the gas-containing liquid level after replacing and discharging (the purpose of the state reduction is to make the calculation simpler and the principle is easier to understand): when the drill bit is positioned above the gas cap, the volume of the annulus under the gas cap position after the drilling tool enters the gas cap to the bottom of the drill hole after being displaced is equal to the volume of the well hole under the gas cap before being displaced, namely, the volume of the drilling fluid of the annulus under the gas cap after being closed and the drill hole is reduced from bottom to top in the hollow well shaft (the volume reduction is realized by using the formula (1)) so as to calculate the boundary position of the oil gas cap before being displaced, and meanwhile, the calculation is carried out by using the method for calculating the displacement face reset gas channeling speed by combining other calculation parameters, wherein the formula is shown in (2).
Before drilling, the gas cap is positioned in the ith section of the casing pipe, and the distance between the gas cap and the bottom of the well is as follows:
the gas blow-by speed is calculated using equation (2):
in the formula: i is more than or equal to 1, n represents the number of times that the volume of the annulus needs to be calculated in a segmented mode in the calculation process, for example, in the figure 2, the volume of 4 different annuluses needs to be calculated; vGas channeling: average upward gas channeling speed, m/h; hgThe height of the gas cap from the bottom of the well before drilling down is m; hChinese angelica root-bark: homing to well depth, m; hB: bottom hole depth, m; h1、H2…HiThe lengths of the sections of the same type in the well before drilling are m; s1、S2…SiIs the annular sectional area m of each section of the same type in a well before drilling2；VRing (C): drilling fluid annular volume m after drilling3(ii) a N: the total pump stroke number when the cycle has the aftereffect (removing the pipeline delay time (namely subtracting the pipeline delay time from the corresponding time after determining the starting point, and setting the accumulated pump stroke number corresponding to the time after the backward movement as the required parameter N)), and flushing; q: volume per stroke, m3Punching; t is tQuiet: stopping the pump, starting the drill and taking the drill down to the total time of the effect, namely the rest time h after stopping the pump; t is tRow board: the time from circulation to the effect, namely the time from starting the pump to the effect, h.
The present invention will be further described with reference to the following specific examples.
Example 1: (the drill bit is above the gas layer before drilling):
and (3) a certain well grows up after four-straight-hole core-taking operation, then is drilled down to 7752.50m, the pump is started up and discharged, the well depth is 7765m, the pump starting time is 04:58, the pump is stopped for 34min midway, the aftereffect starting time is 08:16, the well is static for 49.05h, the initial value of the total hydrocarbon is 1.324, and the maximum value is 99%. The parameters are shown in table 1:
TABLE 1
The late time method calculates the parameters: the position of the drill bit is delayed to 225min, the rest time is 49.05h, the homing well depth is 7661m (the last layer of oil gas is displayed), the pump is started and the display time is 164min, and the calculation result is 41.05 m/h.
The parameters are calculated by using the liquid discharge surface resetting gas channeling speed calculation method of the invention: the standing time is 52.35h (wherein 3.3h is the time from starting to seeing effect), the well depth is 7376m (shown in the first layer of oil gas), the total pumping number from starting to getting out after removing the pipeline delay time is 5732 strokes (19.72L per stroke volume calculated by 95% of the upper water efficiency), and the calculation result is 25.65 m/h.
Example 2: (the drill bit is located below the gas layer before drilling):
a well is short in a four-opening well bore to 7353m in a sleeve for static measurement of after effect, then is drilled to 7753m for circular discharge of after effect, the static time is 7.78h, the pump starting time is 10:53, the after effect starting time is 13:31, the initial value of total hydrocarbon is 2.112%, and the maximum value is 99%. The parameters are shown in table 2:
TABLE 2
The late time method calculates the parameters: the delay time of the drill bit is 189min, the rest time is 7.78h, the homing well depth is 7661m (the last layer of oil gas is displayed), the pump is started, the display time is 158min, and the calculation result is 153.28 m/h.
The parameters are calculated by using the liquid discharge surface resetting gas channeling speed calculation method of the invention: the standing time is 10.41h (wherein 2.63h is the time from starting the pump to the later effect), the well depth is 7376m (the first layer of oil gas is displayed), the total pumping time from starting the pump to the later effect after the pipeline delay time is removed is 6737 strokes (19.72L per stroke volume calculated according to the upper water efficiency of 95%), and the calculation result is 89.24 m/h.
Compared with the method, the method has the advantages that the calculated gas channeling speed is larger by the late time method commonly used in the field at present, particularly, the calculation is obvious after the deep well is stood for a short time, great troubles are brought to the judgment of well control safety and the formulation of the next construction scheme, and any underground safety problem does not occur in the subsequent construction by adopting the method.
The above-described embodiment is only one embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be easily made based on the application and principle of the present invention disclosed in the present application, and the present invention is not limited to the method described in the above-described embodiment of the present invention, so that the above-described embodiment is only preferred, and not restrictive.
Claims (7)
1. A method for calculating the oil gas channeling speed for well drilling and completion is characterized by comprising the following steps: according to the method, according to the displacement effect of a drilling tool, the volume of annular drilling fluid below a gas cap after closed displacement and drilling is subjected to volume reduction from bottom to top in an empty shaft to obtain an oil-gas top boundary position before displacement, and then the oil-gas top boundary position is used for calculating to obtain the oil-gas upward-flowing speed;
the method comprises the following steps:
(1) collecting well body structure and drilling tool structure parameters;
(2) acquiring the water feeding efficiency of each mud pump; testing the aftereffect delay time of the logging instrument;
(3) determining an after-effect total hydrocarbon starting point in the after-effect elimination process;
(4) determining the gas channeling time;
(5) determining the homing well depth;
(6) carrying out volume reduction on the volume of annular drilling fluid below the gas cap after the drilling of the closed row in the hollow shaft from bottom to top to obtain the oil-gas top boundary position before the displacement;
(7) calculating the oil-gas upward channeling speed by using the oil-gas top boundary position;
the oil and gas top boundary position is obtained by calculation according to the following formula:
wherein HgThe position of the oil gas top boundary is shown;
i represents that the gas cap is positioned in the ith section of the casing before drilling, and i is more than or equal to 1;
n represents the number of times of calculating the volume of the annular space in a segmented manner in the calculation process, and n is more than or equal to 1;
H1、H2to HiThe length of each section of the same type in the well before drilling is expressed in m;
S1、S2to SiThe annular cross-sectional area of each section of the same type in the well before drilling is in the unit of m2；
VRing (C)The annular volume of the drilling fluid after drilling is in m3；
N is the total pump stroke number when the circulation has aftereffect, and the unit is stroke; subtracting the aftereffect delay time of the logging instrument obtained in the step (2) from the time corresponding to the aftereffect total hydrocarbon starting point determined in the step (3) to obtain the time after the reversing, wherein the sum of the stroke number of the pump corresponding to the time after the reversing is N;
q is the volume per stroke in m3And punching.
2. The method of calculating the rate of oil and gas upgoing for well drilling and completion according to claim 1, wherein: the parameters acquired in the step (1) comprise: the inner diameter of the casing pipe and the outer diameter of the drill pipe.
3. The method of calculating the rate of oil and gas upgoing for well drilling and completion according to claim 1, wherein: the operation of the step (3) comprises:
selecting 2 times of the reference value as a post-effect total hydrocarbon starting point in the post-effect discharging process;
the reference value is the total hydrocarbon value displayed by the logging instrument.
4. The method of calculating the rate of oil and gas upgoing for well drilling and completion according to claim 3, wherein: the operation of the step (4) comprises the following steps:
counting the stationary time t after stopping the pumpQuietTime t from starting pump to coming back to effectRow boardAnd adding the two to obtain the gas upward-fleeing time.
5. The method of calculating the rate of oil and gas upgoing for well drilling and completion according to claim 4, wherein: the operation of the step (5) comprises the following steps:
in the field drilling process, if the first hydrocarbon reservoir has obvious single peak display or the first hydrocarbon reservoir finds multi-peak display in other hydrocarbon reservoirs, the top position of the first hydrocarbon reservoir is taken as the homing well depth HChinese angelica root-bark(ii) a If the first hydrocarbon reservoir has no single peak display after drilling through or no obvious single peak display after cyclic drainage after long-term rest, the top positions of other more active hydrocarbon reservoirs are taken as the homing well depth HChinese angelica root-bark。
6. The method of calculating the rate of oil and gas upgoing for well drilling and completion according to claim 5, wherein: the operation of the step (6) comprises the following steps:
S1、S2to Si、VRing (C)The method is obtained by calculating the inner diameter of the casing and the outer diameter of the drill rod collected in the step (1);
and (3) multiplying the water feeding theoretical value of each mud pump by the water feeding efficiency of the mud pump obtained in the step (2) to obtain Q.
7. The method of calculating the rate of oil and gas upgoing for well drilling and completion according to claim 6, wherein: the operation of the step (7) comprises the following steps:
calculating the upward oil-gas fleeing speed V by using the formula (2)Gas channeling：
HBIn units of m, the depth of the bottom hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810454111.8A CN110485992B (en) | 2018-05-14 | 2018-05-14 | Method for calculating oil gas channeling speed for well drilling and completion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810454111.8A CN110485992B (en) | 2018-05-14 | 2018-05-14 | Method for calculating oil gas channeling speed for well drilling and completion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110485992A CN110485992A (en) | 2019-11-22 |
| CN110485992B true CN110485992B (en) | 2021-11-26 |
Family
ID=68580771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810454111.8A Active CN110485992B (en) | 2018-05-14 | 2018-05-14 | Method for calculating oil gas channeling speed for well drilling and completion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110485992B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0466229A1 (en) * | 1990-06-29 | 1992-01-15 | Anadrill International SA | Method of and apparatus for detecting an influx into a well while drilling |
| CN101139925A (en) * | 2006-09-08 | 2008-03-12 | 西南石油大学 | Method for while-drilling testing reservoir parameter property and adjusting well drilling action in real time |
| CN104251135A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Highly-deviated well space in-place method |
| CN105332671A (en) * | 2015-10-27 | 2016-02-17 | 中国石油天然气股份有限公司 | Technique for cementation of high-pressure well |
| CN106339549A (en) * | 2016-08-29 | 2017-01-18 | 中国地质大学（北京） | Measuring and calculating method of upwelling speed of oil gas |
| US9612187B1 (en) * | 2016-09-08 | 2017-04-04 | China University Of Petroleum (East China) | Experimental apparatus for studying gas invasion and migration mechanism in oil and gas wellbores |
| CN106948803A (en) * | 2016-01-06 | 2017-07-14 | 中石化石油工程技术服务有限公司 | The kill-job processing method of trip-out process well kick |
| CN107066768A (en) * | 2017-06-06 | 2017-08-18 | 长江大学 | Ascending Velocity For Oil ＆ Gas computational methods |
| CN107356966A (en) * | 2017-07-20 | 2017-11-17 | 中国石油化工股份有限公司 | Based on removing compaction deep layer river channel sand gas-oil detecting method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6059040A (en) * | 1997-09-19 | 2000-05-09 | Levitan; Leonid L. | Method and apparatus for withdrawal of liquid phase from wellbores |
| US8794350B2 (en) * | 2007-12-19 | 2014-08-05 | Bp Corporation North America Inc. | Method for detecting formation pore pressure by detecting pumps-off gas downhole |
-
2018
- 2018-05-14 CN CN201810454111.8A patent/CN110485992B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0466229A1 (en) * | 1990-06-29 | 1992-01-15 | Anadrill International SA | Method of and apparatus for detecting an influx into a well while drilling |
| CN101139925A (en) * | 2006-09-08 | 2008-03-12 | 西南石油大学 | Method for while-drilling testing reservoir parameter property and adjusting well drilling action in real time |
| CN104251135A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Highly-deviated well space in-place method |
| CN105332671A (en) * | 2015-10-27 | 2016-02-17 | 中国石油天然气股份有限公司 | Technique for cementation of high-pressure well |
| CN106948803A (en) * | 2016-01-06 | 2017-07-14 | 中石化石油工程技术服务有限公司 | The kill-job processing method of trip-out process well kick |
| CN106339549A (en) * | 2016-08-29 | 2017-01-18 | 中国地质大学（北京） | Measuring and calculating method of upwelling speed of oil gas |
| US9612187B1 (en) * | 2016-09-08 | 2017-04-04 | China University Of Petroleum (East China) | Experimental apparatus for studying gas invasion and migration mechanism in oil and gas wellbores |
| CN107066768A (en) * | 2017-06-06 | 2017-08-18 | 长江大学 | Ascending Velocity For Oil ＆ Gas computational methods |
| CN107356966A (en) * | 2017-07-20 | 2017-11-17 | 中国石油化工股份有限公司 | Based on removing compaction deep layer river channel sand gas-oil detecting method |
Non-Patent Citations (18)
| Title |
|---|
| "Modeling of Cuttings Lag Distribution in Directional Drilling to Evaluate Depth Resolution of Mud Logging";Shigemi Naganawa;《society of petroleum engineers》;20180308;全文 * |
| "后效气录井油气上窜速度的准确计算";张瑞强;《录井工程》;20101231;第21卷(第4期);全文 * |
| "后效资料在德惠断陷气层解释中的应用研究";龚一顺;《石油天然气学报》;20171015;全文 * |
| "基于泥浆体积排代法计算油气上窜速度研究";孙士平，等;《长江大学学报（自然科学版）》;20100930;第7卷(第3期);第499-502页 * |
| "实测迟到时间在岩屑 、气测录井中的重要性";乔艳艳;《西部探矿工程》;20100730;第22卷(第7期);全文 * |
| "实测迟到时间法计算油气上窜速度的探讨";张世明，等;《录井工程》;20160930;第27卷(第3期);第18-22页 * |
| "油气上窜速度实用计算方法";孙晓波;《探矿工程（岩土钻掘工程）》;20160930;第43卷(第9期);全文 * |
| "油气上窜速度实用计算方法";张桂林;《石油钻探技术》;20061130(第6期);全文 * |
| "油气上窜速度的精确计算方法";李基伟，等;《科学技术与工程》;20140831;第14卷(第22期);第180-184页 * |
| "油气上窜速度计算方法的修改";李振海，等;《录井工程》;20110630;第22卷(第2期);全文 * |
| "油气上窜速度计算方法的改进与应用 ";宋广健，等;《石油钻采工艺》;20100930;第32卷(第5期);第17-19页 * |
| "油气上窜速度计算方法的改进与现场应用";郇志鹏，等;《录井工程》;20180331;第29卷(第1期);全文 * |
| "浅谈气测录井双单根峰的识别";宋义民，等;《录井技术》;20030815(第3期);全文 * |
| "离散滑脱滞后时间法深井气窜速度计算";黄志强，等;《西南石油大学学报（自热科学版）》;20170430;第39卷(第2期);全文 * |
| "钻井液顶替法计算油气上窜速度";赵勇，等;《中国科技信息》;20100831(第16期);第40-41页 * |
| "钻柱下入对后效录井的影响分析";宋双双;《内蒙古石油化工》;20140731;第40卷(第14期);全文 * |
| "顺南区块目的层安全钻井技术";刘仕银，等;《西部探矿工程》;20180131;第30卷(第1期);全文 * |
| 孙士平，等."基于泥浆体积排代法计算油气上窜速度研究".《长江大学学报（自然科学版）》.2010,第7卷(第3期),第499-502页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110485992A (en) | 2019-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9243494B2 (en) | Apparatus and method for fluid property measurements | |
| CN100402797C (en) | Method for in-situ analysis of formation parameters | |
| WO2018160927A1 (en) | Conductivity probe fluid property measurement systems and related methods | |
| CN106014387A (en) | Bottom hole pressure real-time prediction and control method | |
| US9115567B2 (en) | Method and apparatus for determining efficiency of a sampling tool | |
| RU2474682C2 (en) | Method and system for interpretation of swabbing tests using non-linear regression | |
| CN109190854B (en) | Method for predicting water inflow of working surface by multi-factor comparison of water filling of bottom plate | |
| EP3181809A1 (en) | A method for detecting gain or loss of drilling fluid in a drilling installation associated calculation system and associated drilling installation | |
| CN110847897B (en) | Method for actively detecting lost circulation by using radioactive indicator | |
| CN109162707A (en) | Drop ply position judgment method in a kind of drilling process | |
| CN106837303B (en) | Method for determining drilling depth in real time according to operation parameters of hydraulic drilling machine | |
| CN106401557B (en) | A kind of method of joint test coal seam gas-bearing capacity and the determining effective extraction radius that drills of gas pressure | |
| CN110485992B (en) | Method for calculating oil gas channeling speed for well drilling and completion | |
| RU2318993C1 (en) | Method for watered oil pool development | |
| CN107355200B (en) | Method for improving water drive well selection by nano-micron particle dispersion system | |
| CN108999608A (en) | A kind of low permeable glutenite rock reservoir predominant pathway recognition methods and system | |
| CN107339096A (en) | A kind of quick groundwater prospecting method of horizontal well | |
| RU2014153434A (en) | SYSTEMS AND METHODS FOR VERTICAL DEPTH CONTROL DURING WELLING OF A WELL WITH A LARGE WAY FROM VERTICAL | |
| CN111350488B (en) | Method and device for monitoring drilling depth and drilling speed of mine down-the-hole drilling machine | |
| CN1055033A (en) | Drag analysis method | |
| CN111963161B (en) | Method and device for determining hidden abnormal oil well | |
| CN114427444A (en) | Bottom hole pressure prediction method for oil production well in flowing period | |
| CN110826016B (en) | Saturation and free water surface calculation and prediction method based on microscopic heterogeneity representation | |
| CN106339549A (en) | Measuring and calculating method of upwelling speed of oil gas | |
| US20210270124A1 (en) | Method for distinguishing authenticity of high-pressure physical property parameters of oil reservoirs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |