CN113062730A - Method and equipment for determining drilling safety density window - Google Patents
Method and equipment for determining drilling safety density window Download PDFInfo
- Publication number
- CN113062730A CN113062730A CN201911402878.7A CN201911402878A CN113062730A CN 113062730 A CN113062730 A CN 113062730A CN 201911402878 A CN201911402878 A CN 201911402878A CN 113062730 A CN113062730 A CN 113062730A
- Authority
- CN
- China
- Prior art keywords
- determining
- pressure
- target
- target depth
- density
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000012530 fluid Substances 0.000 claims abstract description 36
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 31
- 239000011435 rock Substances 0.000 claims abstract description 27
- 239000004215 Carbon black (E152) Substances 0.000 claims description 24
- 229930195733 hydrocarbon Natural products 0.000 claims description 24
- 150000002430 hydrocarbons Chemical class 0.000 claims description 24
- 230000000903 blocking effect Effects 0.000 claims description 13
- 230000001133 acceleration Effects 0.000 claims description 8
- 230000002706 hydrostatic effect Effects 0.000 claims description 6
- NFACJZMKEDPNKN-UHFFFAOYSA-N trichlorfon Chemical compound COP(=O)(OC)C(O)C(Cl)(Cl)Cl NFACJZMKEDPNKN-UHFFFAOYSA-N 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 10
- 238000002474 experimental method Methods 0.000 description 7
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 6
- 229910052753 mercury Inorganic materials 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000013528 artificial neural network Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- 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
-
- 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
- E21B47/06—Measuring temperature or pressure
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Soil Sciences (AREA)
- Earth Drilling (AREA)
Abstract
The embodiment of the invention provides a method and equipment for determining a drilling safety density window, wherein the method comprises the following steps: the method comprises the steps of obtaining the formation pressure of a target oil gas reservoir at a target depth, determining the pressure coefficient of the target oil gas reservoir at the target depth according to the formation pressure, obtaining the median capillary pressure of a rock sample, determining the first additional value of the density of a drilling fluid at the target depth according to the median capillary pressure, obtaining the maximum pressure-bearing value of a plugging layer, determining the second additional value of the density of the drilling fluid at the target depth according to the maximum pressure-bearing value, determining the range of a safe density window of the target oil gas reservoir at the target depth according to the pressure coefficient, the first additional value and the second additional value, and sending the range of the safe density window to a manager terminal.
Description
Technical Field
The invention belongs to the technical field of oil exploitation, and particularly relates to a method and equipment for determining a drilling safety density window.
Background
When dense clastic rock oil gas is hidden in drilling, the solid phase of drilling-out liquid enters an oil-gas layer to cause pore throat blockage, and the liquid phase of the drilling-out liquid enters the oil-gas layer to act with rocks and fluids in the oil-gas layer to easily induce damages such as water sensitivity, salt sensitivity, alkali sensitivity, wetting reversal, surface adsorption and the like, so that the original balance of the oil-gas layer is damaged, and the permeability of an oil-gas reservoir is reduced. Therefore, there is a need to protect hydrocarbon reservoirs while drilling.
Currently, the common reservoir protection technique is to use a temporary plugging agent to form a plugging layer in the reservoir, thereby preventing the solid or liquid phase of the drilling fluid from continuing to invade the reservoir.
However, when designing the existing drilling safe density window for the compact clastic rock oil and gas reservoir, only factors such as avoiding drilling accidents, maintaining stable bottom hole pressure and the like are considered, and the reservoir of the compact clastic rock oil and gas reservoir cannot be protected, so that the temporary plugging agent cannot form a plugging layer in the oil and gas reservoir, or the strength of the formed plugging layer is unstable.
Disclosure of Invention
The invention provides a method and equipment for determining a drilling safety density window, which can protect a compact clastic rock oil-gas reservoir.
In a first aspect, the present invention provides a method for determining a safe density window for drilling, comprising:
acquiring the formation pressure of a target oil gas reservoir at a target depth, and determining the pressure coefficient of the target oil gas reservoir at the target depth according to the formation pressure;
obtaining the median capillary pressure of the rock sample, and determining a first additional value of the density of the drilling fluid at the target depth according to the median capillary pressure;
obtaining the maximum pressure-bearing value of a plugging layer, and determining a second additional value of the density of the drilling fluid at the target depth according to the maximum pressure-bearing value;
and determining the range of the target oil and gas in a safe density window of the target depth according to the pressure coefficient, the first additional value and the second additional value, and sending the range of the safe density window to a manager terminal.
In one possible implementation, the determining a first additional value of the density of the drilling fluid at the target depth according to the median capillary pressure comprises:
according to the expression Δ P1＝ρ1gh determining a first additional value rho of the density of the drilling fluid at the target depth1；
Wherein, Δ P1The median capillary pressure, h the target depth, and g the acceleration of gravity.
In one possible implementation, the determining a second additional value of the density of the drilling fluid at the target depth according to the maximum bearing value includes:
according to the expression Δ P2＝ρ2gh determining a second additional value rho of the density of the drilling fluid at the target depth2；
Wherein, Δ P2H is the target depth, and g is the gravitational acceleration.
In one possible implementation, the determining the range of safe density windows for the target hydrocarbon reservoir at the target depth according to the pressure coefficient, the first additional value and the second additional value includes:
according to the expression rhoLower part＝ρ0+ρ1Determining a lower bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthLower partAccording to the expression ρOn the upper part＝ρ0+ρ2Determining an upper bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthOn the upper part；
Where ρ is0Is the pressure coefficient, p1Is a first added value, ρ2Is a second added value.
In a possible implementation manner, the sending the range of the security density window to a manager terminal includes:
and if the range of the safe density window is within a preset range, sending the safe density window to a manager terminal.
In one possible implementation, the determining a pressure coefficient of the target hydrocarbon reservoir at the target depth according to the formation pressure includes:
according to the expression rho0＝Ph/P0Determining the target hydrocarbon reservoir at the target depthCoefficient of pressure ρ0；
Wherein, PhIs the formation pressure, P0Is the hydrostatic column pressure at the target depth.
In a second aspect, the present invention provides an apparatus for determining a safe density window for drilling, comprising:
the first determination module is used for acquiring the formation pressure of a target oil gas reservoir at a target depth and determining a pressure coefficient of the target oil gas reservoir at the target depth according to the formation pressure;
the second determination module is used for obtaining the median capillary pressure of the rock sample and determining a first additional value of the density of the drilling fluid at the target depth according to the median capillary pressure;
the third determination module is used for obtaining the maximum pressure-bearing value of the blocking layer and determining a second additional value of the density of the drilling fluid at the target depth according to the maximum pressure-bearing value;
and the fourth determination module is used for determining the range of the safe density window of the target oil and gas at the target depth according to the pressure coefficient, the first additional value and the second additional value, and sending the range of the safe density window to a manager terminal.
In an implementation manner, the fourth determining module is specifically configured to perform the following operation according to an expression ρLower part＝ρ0+ρ1Determining a lower bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthLower partAccording to the expression ρOn the upper part＝ρ0+ρ2Determining an upper bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthOn the upper part；
Where ρ is0Is the pressure coefficient, p1Is a first added value, ρ2Is a second added value.
In a third aspect, the present invention provides an apparatus for determining a safe density window for drilling, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform a method of determining a safe density window for drilling as defined in any one of the first aspects of the invention.
In a fourth aspect, the present invention provides a computer readable storage medium having stored thereon computer executable instructions which, when executed by a processor, implement a method of determining a safe density window for drilling according to any one of the first aspect of the present invention.
The method comprises the steps of determining a first additional value of the density of the drilling fluid at a target depth according to the median capillary pressure of a rock sample, determining a second additional value of the density of the drilling fluid at the target depth according to the maximum pressure-bearing value of a blocking layer, and determining the range of a safety density window according to the pressure coefficient of the target oil gas at the target depth, the first additional value and the second additional value, wherein the range of the safety density window can ensure that a temporary plugging agent can form a blocking layer in an oil-gas layer and can prevent the blocking layer from being damaged in the drilling process, so that a reservoir of the oil-gas layer is protected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of a system for determining a safe density window for drilling according to an embodiment of the present invention;
FIG. 2 is a first flowchart of a method for determining a safe density window for drilling according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a capillary pressure curve provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of an evaluation result of a pressure-bearing test provided by an embodiment of the invention;
FIG. 5 is a second flowchart of a method for determining a safe density window for drilling according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a device for determining a safe density window for drilling according to an embodiment of the present invention;
fig. 7 is a schematic hardware structure diagram of a device for determining a safe density window for drilling according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic diagram of a determination system of a safe density window for drilling according to an embodiment of the present invention, as shown in fig. 1, the system includes: a server 101 and a terminal 102. The server 101 and the terminal 102 are connected via a network 103.
The server 101 includes, but is not limited to: the system comprises a platform server, a cloud server, a server cluster formed by a plurality of servers and the like.
The terminals 102 include, but are not limited to: desktop computer, notebook computer, panel computer, cell-phone, intelligent wearing equipment etc..
The server 101 determines the drilling safety density window range, and sends the safety density window range to the terminal 102 through the network 103, so that a manager can obtain the safety density window range through the terminal 102 and perform operation.
When an existing tight clastic rock oil and gas reservoir drilling safety density window is designed, factors such as avoiding drilling accidents, maintaining bottom hole pressure stability and the like are only considered, a tight clastic rock oil and gas reservoir cannot be protected, and therefore a temporary plugging agent cannot form a plugging layer in an oil and gas reservoir or the strength of the formed plugging layer is unstable. The method and the device for determining the drilling safety density window provided by the embodiment of the invention can protect a compact clastic rock oil-gas reservoir.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 2 is a first flowchart of a method for determining a drilling safety density window according to an embodiment of the present invention, where an execution subject of the embodiment is the server in fig. 1. As shown in fig. 2, the method of this embodiment may include:
step 201, acquiring the formation pressure of a target oil and gas reservoir at a target depth, and determining the pressure coefficient of the target oil and gas reservoir at the target depth according to the formation pressure.
In the embodiment of the invention, the formation pressure is obtained by predicting the formation pressure of the target oil and gas reservoir at the target depth. Formation pressure prediction methods include, but are not limited to, rate of penetration methods, geophysical methods, well logging methods, and the like. A combination of methods is often required to predict formation pressure. The concrete prediction method of the formation pressure belongs to the common technical means in the field, and the embodiment of the invention is not repeated.
After the formation pressure of the target oil gas reservoir at the target depth is obtained, the pressure coefficient of the target oil gas reservoir at the target depth is determined according to the formation pressure, and specifically, the pressure coefficient is determined according to the ratio of the formation pressure to the hydrostatic column pressure at the target depth.
Step 202, obtaining a median capillary pressure of the rock sample, and determining a first additional value of the density of the drilling fluid at the target depth according to the median capillary pressure.
In the embodiment of the invention, the median capillary pressure of the rock sample is determined through the capillary pressure curve. The capillary pressure curve can be obtained by mercury-pressing experiments by using a full-automatic mercury pressure instrument and can also be obtained by prediction of a neural network. The method for predicting the capillary pressure curve through the neural network can be as follows: acquiring mercury intrusion data of rock samples with different homogeneity characteristics, taking the mercury intrusion data of the rock samples with different homogeneity characteristics as training samples, taking rock sample pore permeability parameters, sorting coefficients, average pore throat radius and capillary pressure as input parameters, and accumulating mercury saturation as output parameters, and predicting a capillary pressure curve by adopting a BP (Back propagation) neural network algorithm.
Fig. 3 is a schematic diagram of a capillary pressure curve provided in an embodiment of the present invention, and as shown in fig. 3, the median capillary pressure of a rock sample is a capillary pressure value corresponding to a mercury saturation of 50%. For the capillary pressure curves measured by a plurality of groups of experiments, the median capillary pressure of the rock sample is the average value of capillary pressure values corresponding to 50% of mercury saturation in each capillary pressure curve.
The terminal sends the median capillary pressure of the rock sample to the server, and after the server obtains the median capillary pressure of the rock sample, the server determines a first additional value of the density of the drilling fluid at the target depth according to the median capillary pressure.
And 203, acquiring the maximum pressure-bearing value of the blocking layer, and determining a second additional value of the density of the drilling fluid at the target depth according to the maximum pressure-bearing value.
In the embodiment of the invention, the temporary plugging agent can form a plugging layer in an oil-gas layer, and the maximum pressure bearing value of the plugging layer is the maximum positive pressure difference when the strength of the plugging layer is damaged. And determining the maximum pressure-bearing value of the blocking layer through a pressure-bearing experiment of the blocking layer.
Fig. 4 is a schematic diagram of an evaluation result of a pressure-bearing experiment provided by an embodiment of the present invention, and a maximum pressure-bearing value of a blocking layer is obtained according to the pressure-bearing experiment result shown in fig. 4.
And the terminal sends the maximum pressure-bearing value of the blocking layer obtained by the experiment to the server, and after the server obtains the maximum pressure-bearing value of the blocking layer, the second additional value of the density of the drilling fluid at the target depth is determined according to the maximum pressure-bearing value.
And 204, determining the range of the target oil and gas hiding in the safe density window of the target depth according to the pressure coefficient, the first additional value and the second additional value, and sending the range of the safe density window to a manager terminal.
In the embodiment of the invention, the server determines the range of the safe density window where the target oil and gas is hidden at the target depth according to the pressure coefficient, the first additional value and the second additional value, and sends the range of the safe density window to the manager terminal, so that the manager can operate according to the range of the safe density window.
According to the embodiment of the invention, the first additional value of the density of the drilling fluid at the target depth is determined through the median capillary pressure of the rock sample, the second additional value of the density of the drilling fluid at the target depth is determined through the maximum pressure-bearing value of the blocking layer, and the range of a safety density window is determined according to the pressure coefficient of the target oil gas at the target depth, the first additional value and the second additional value.
Fig. 5 is a flowchart of a second method for determining a drilling safety density window according to an embodiment of the present invention, where an execution subject of the embodiment is the server in fig. 1. As shown in fig. 5, the method of this embodiment may include:
step S501, acquiring the formation pressure of a target oil gas reservoir at a target depth according to an expression rho0＝Ph/P0Determining a pressure coefficient ρ of the target hydrocarbon reservoir at the target depth0(ii) a Wherein, PhIs the formation pressure, P0Is the hydrostatic column pressure at the target depth.
Step S502, obtaining the median capillary pressure of the rock sample according to the expression delta P1＝ρ1gh determining a first additional value rho of the density of the drilling fluid at the target depth1(ii) a Wherein, Δ P1The median capillary pressure, h the target depth, and g the acceleration of gravity.
Step S503, acquiring the maximum pressure-bearing value of the plugging layer according to the expression delta P2＝ρ2gh determining a second additional value rho of the density of the drilling fluid at the target depth2(ii) a Wherein, Δ P2H is the target depth, and g is the gravitational acceleration.
Step S504, according to the expression rhoLower part＝ρ0+ρ1Determining a lower bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthLower partAccording to the expression ρOn the upper part＝ρ0+ρ2Determining an upper bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthOn the upper partSending the range of the security density window to a manager terminal; where ρ is0Is the pressure coefficient, p1Is a first added value, ρ2Is a second added value.
In the embodiment of the invention, the safe density window range of the target oil and gas hidden at the target depth is between rhoLower partAnd rhoOn the upper partIn the meantime.
For example, predicting formation pressure P of target hydrocarbon reservoir at depth hhAnd according to the formation pressure PhThe ratio of the pressure of the hydrostatic column to the depth h is used to obtain the pressure coefficient rho0＝1.80g/m3. Obtaining the median capillary pressure delta P of the rock sample by using the capillary pressure curve1Where the obtained median capillary pressure is a pressure range, the first additional value is calculated taking the lower limit of the pressure range. According to the expression Δ P1＝ρ1gh determining a first additional value rho of the density of the drilling fluid at the target depth1＝0.074g/m3. Obtaining the maximum pressure-bearing value delta P of the plugging layer according to the pressure-bearing experiment of the plugging layer27MPa, wherein when the maximum pressure-bearing value is obtained as a pressure range, the lower limit of the pressure range is takenAnd calculating a second additional value. According to the expression Δ P2＝ρ2gh determines a second additional value rho of the density of the drilling fluid at the target depth20.148, the lower limit of the safe density window of the target hydrocarbon reservoir at the target depth is ρLower part＝1.80+0.074＝1.874g/m3The upper limit of the safe density window of the target oil and gas reservoir at the target depth is rhoOn the upper part＝1.80+0.148＝1.948g/m3I.e. the safety density window is in the range of 1.874g/m3To 1.948g/m3。
As an embodiment of the present invention, on the basis of the embodiment shown in fig. 1, the sending the range of the security density window to the administrator terminal in step S204 includes:
and if the range of the safe density window is within a preset range, sending the safe density window to a manager terminal.
In the embodiment of the invention, the preset range is a density range for maintaining the bottom hole pressure stable in the drilling process and ensuring that accidents such as collapse, rupture and the like do not occur in the drilling process, namely, in the prior art, the range of an original safety density window is designed by considering the factors of avoiding drilling accidents, maintaining the bottom hole pressure stable and the like. The range of the safe density window is within the preset range, so that the reservoir of the oil-gas reservoir can be protected, and safety accidents can be avoided.
Fig. 6 is a schematic structural diagram of a device for determining a safe density window for drilling according to an embodiment of the present invention, and as shown in fig. 6, the device 600 for determining a safe density window for drilling according to the embodiment includes: the first determining module 601, the second determining module 602, the third determining module 603 and the fourth determining module 604 have the following specific functions:
the first determining module 601 is configured to obtain a formation pressure of a target hydrocarbon reservoir at a target depth, and determine a pressure coefficient of the target hydrocarbon reservoir at the target depth according to the formation pressure.
And the second determining module 602 is configured to obtain a median capillary pressure of the rock sample, and determine a first additional value of the density of the drilling fluid at the target depth according to the median capillary pressure.
And a third determining module 603, configured to obtain a maximum pressure-bearing value of the blocking layer, and determine, according to the maximum pressure-bearing value, a second additional value of the density of the drilling fluid at the target depth.
A fourth determining module 604, configured to determine, according to the pressure coefficient, the first additional value, and the second additional value, a range of a safe density window where the target oil and gas is hidden at the target depth, and send the range of the safe density window to a manager terminal.
A second determination module 602, in particular for determining the value of Δ P according to the expression1＝ρ1gh determining a first additional value rho of the density of the drilling fluid at the target depth1；
Wherein, Δ P1The median capillary pressure, h the target depth, and g the acceleration of gravity.
A third determining module 603, specifically configured to determine the value according to the expression Δ P2＝ρ2gh determining a second additional value rho of the density of the drilling fluid at the target depth2；
Wherein, Δ P2H is the target depth, and g is the gravitational acceleration.
A fourth determining module 604, specifically configured to determine the expression ρLower part＝ρ0+ρ1Determining a lower bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthLower partAccording to the expression ρOn the upper part＝ρ0+ρ2Determining an upper bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthOn the upper part；
Where ρ is0Is the pressure coefficient, p1Is a first added value, ρ2Is a second added value.
The fourth determining module 604 is specifically configured to send the security density window to the administrator terminal if the security density window range is within a preset range.
A first determining module 604, specifically configured to determine the expression ρ0＝Ph/P0Determining a pressure coefficient ρ of the target hydrocarbon reservoir at the target depth0；
Wherein, PhIs the formation pressure, P0Is the hydrostatic column pressure at the target depth.
The apparatus of this embodiment may be used to implement the method embodiments shown in fig. 2 or fig. 5, and the implementation principle and technical effect are similar, which are not described herein again.
Fig. 7 is a schematic hardware structure diagram of a device for determining a safe density window for drilling according to an embodiment of the present invention. As shown in fig. 7, the apparatus 700 for determining a safe density window for drilling provided by the present embodiment includes: at least one processor 701 and a memory 702. The apparatus 700 for determining a safe density window for drilling further comprises a communication component 703. The processor 701, the memory 702, and the communication section 703 are connected by a bus 704.
In a specific implementation process, the at least one processor 701 executes the computer-executable instructions stored in the memory 702, so that the at least one processor 701 performs the method for determining the safe drilling density window in any one of the method embodiments described above. The communication component 703 is used for communicating with the terminal device and/or the server.
For a specific implementation process of the processor 701, reference may be made to the above method embodiments, which implement principles and technical effects similar to each other, and details of this embodiment are not described herein again.
In the embodiment shown in fig. 7, it should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise high speed RAM memory and may also include non-volatile storage NVM, such as at least one disk memory.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer executing instruction is stored in the computer-readable storage medium, and when a processor executes the computer executing instruction, the method for determining a drilling safety density window in any of the above method embodiments is implemented.
The computer-readable storage medium described above may be implemented by any type of volatile or non-volatile memory device or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. Readable storage media can be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary readable storage medium is coupled to the processor such the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the readable storage medium may also reside as discrete components in the apparatus.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for determining a safe density window for drilling, comprising:
acquiring the formation pressure of a target oil gas reservoir at a target depth, and determining the pressure coefficient of the target oil gas reservoir at the target depth according to the formation pressure;
obtaining the median capillary pressure of the rock sample, and determining a first additional value of the density of the drilling fluid at the target depth according to the median capillary pressure;
obtaining the maximum pressure-bearing value of a plugging layer, and determining a second additional value of the density of the drilling fluid at the target depth according to the maximum pressure-bearing value;
and determining the range of the target oil and gas in a safe density window of the target depth according to the pressure coefficient, the first additional value and the second additional value, and sending the range of the safe density window to a manager terminal.
2. The method of claim 1, wherein said determining a first additional value of drilling fluid density at said target depth from said median capillary pressure comprises:
according to the expression Δ P1＝ρ1gh determining a first additional value rho of the density of the drilling fluid at the target depth1；
Wherein, Δ P1The median capillary pressure, h the target depth, and g the acceleration of gravity.
3. The method of claim 1, wherein said determining a second additional value of said density of drilling fluid at said target depth from said maximum bearing value comprises:
according to the expression Δ P2＝ρ2gh determining a second additional value rho of the density of the drilling fluid at the target depth2；
Wherein, Δ P2H is the target depth, and g is the gravitational acceleration.
4. The method of claim 1, wherein the determining a range of safe density windows for the target hydrocarbon at the target depth from the pressure coefficient, the first additional value, and the second additional value comprises:
according to the expression rhoLower part＝ρ0+ρ1Determining a lower bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthLower partAccording to the expression ρOn the upper part＝ρ0+ρ2Determining an upper bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthOn the upper part；
Where ρ is0Is the pressure coefficient, p1Is a first added value, ρ2Is a second added value.
5. The method of claim 1, wherein sending the range of security density windows to a manager terminal comprises:
and if the range of the safe density window is within a preset range, sending the safe density window to a manager terminal.
6. The method of claim 1, wherein the determining a pressure coefficient of the target hydrocarbon reservoir at the target depth from the formation pressure comprises:
according to the expression rho0＝Ph/P0Determining that the target oil and gas is hidden at the targetPressure coefficient of depth ρ0；
Wherein, PhIs the formation pressure, P0Is the hydrostatic column pressure at the target depth.
7. An apparatus for determining a safe density window for drilling, comprising:
the first determination module is used for acquiring the formation pressure of a target oil gas reservoir at a target depth and determining a pressure coefficient of the target oil gas reservoir at the target depth according to the formation pressure;
the second determination module is used for obtaining the median capillary pressure of the rock sample and determining a first additional value of the density of the drilling fluid at the target depth according to the median capillary pressure;
the third determination module is used for obtaining the maximum pressure-bearing value of the blocking layer and determining a second additional value of the density of the drilling fluid at the target depth according to the maximum pressure-bearing value;
and the fourth determination module is used for determining the range of the safe density window of the target oil and gas at the target depth according to the pressure coefficient, the first additional value and the second additional value, and sending the range of the safe density window to a manager terminal.
8. The apparatus of claim 7,
the fourth determining module is specifically configured to determine the expression ρLower part＝ρ0+ρ1Determining a lower bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthLower partAccording to the expression ρOn the upper part＝ρ0+ρ2Determining an upper bound ρ of a safe density window of the target hydrocarbon reservoir at the target depthOn the upper part；
Where ρ is0Is the pressure coefficient, p1Is a first added value, ρ2Is a second added value.
9. An apparatus for determining a safe density window for drilling, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method of determining a safe density window for drilling as recited in any one of claims 1 to 6.
10. A computer-readable storage medium having computer-executable instructions stored thereon, which when executed by a processor, implement the method of determining a safe density window for drilling as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911402878.7A CN113062730B (en) | 2019-12-31 | 2019-12-31 | Method and equipment for determining drilling safety density window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911402878.7A CN113062730B (en) | 2019-12-31 | 2019-12-31 | Method and equipment for determining drilling safety density window |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113062730A true CN113062730A (en) | 2021-07-02 |
| CN113062730B CN113062730B (en) | 2024-06-25 |
Family
ID=76558474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911402878.7A Active CN113062730B (en) | 2019-12-31 | 2019-12-31 | Method and equipment for determining drilling safety density window |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113062730B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140257702A1 (en) * | 2013-03-08 | 2014-09-11 | Saudi Arabian Oil Company | Determining continuous capillary pressure curves for subsurface earth formations using saturation and nmr log data |
| CN106351650A (en) * | 2015-07-16 | 2017-01-25 | 中国石油化工股份有限公司 | Calculation method of borehole sloughing pressure applicable to the bedding fractured stratum |
| CN107355206A (en) * | 2017-08-31 | 2017-11-17 | 西南石油大学 | A kind of shale gas horizontal well refracturing temporarily blocks up critical pressure method of testing |
| CN108252710A (en) * | 2018-02-26 | 2018-07-06 | 中国石油天然气股份有限公司 | Method and device for determining water saturation of oil reservoir |
| CN108825199A (en) * | 2018-07-02 | 2018-11-16 | 中国石油大学(北京) | Radial multiple-limb drilling well and completion method and device and application that temporarily stifled pressure break connection is made |
| CN108843313A (en) * | 2018-06-23 | 2018-11-20 | 东北石油大学 | Shale formation drilling safety drilling fluid density window design method |
| US20190368346A1 (en) * | 2018-05-31 | 2019-12-05 | Saudi Arabian Oil Company | Determining safe drilling mud weight |
-
2019
- 2019-12-31 CN CN201911402878.7A patent/CN113062730B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140257702A1 (en) * | 2013-03-08 | 2014-09-11 | Saudi Arabian Oil Company | Determining continuous capillary pressure curves for subsurface earth formations using saturation and nmr log data |
| CN106351650A (en) * | 2015-07-16 | 2017-01-25 | 中国石油化工股份有限公司 | Calculation method of borehole sloughing pressure applicable to the bedding fractured stratum |
| CN107355206A (en) * | 2017-08-31 | 2017-11-17 | 西南石油大学 | A kind of shale gas horizontal well refracturing temporarily blocks up critical pressure method of testing |
| CN108252710A (en) * | 2018-02-26 | 2018-07-06 | 中国石油天然气股份有限公司 | Method and device for determining water saturation of oil reservoir |
| US20190368346A1 (en) * | 2018-05-31 | 2019-12-05 | Saudi Arabian Oil Company | Determining safe drilling mud weight |
| CN108843313A (en) * | 2018-06-23 | 2018-11-20 | 东北石油大学 | Shale formation drilling safety drilling fluid density window design method |
| CN108825199A (en) * | 2018-07-02 | 2018-11-16 | 中国石油大学(北京) | Radial multiple-limb drilling well and completion method and device and application that temporarily stifled pressure break connection is made |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113062730B (en) | 2024-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107657365B (en) | Geological resource exploitation value evaluation method and device | |
| US11047228B2 (en) | Predicting carbonate porosity based on petrographic data | |
| CN107806916B (en) | Method and device for determining reservoir reconstruction volume | |
| CN110532707A (en) | The stewing well time determines method and apparatus | |
| Yin et al. | Initial velocity effect on acceleration fall of a spherical particle through still fluid | |
| CN113221347B (en) | Well wall stability drilling optimization method, device and equipment | |
| CN108681793B (en) | Deep reservoir oil extraction index prediction method and device | |
| Poulsen et al. | Effects of intraborehole flow on purging and sampling long‐screened or open wells | |
| CN113062730A (en) | Method and equipment for determining drilling safety density window | |
| CN110578503A (en) | Method and system for determining initial water saturation of oil reservoir in polymer flooding numerical well testing | |
| US11402315B2 (en) | Estimating relative permeability and capillary pressures of a geological formation based on multiphase upscaling | |
| CN110439546B (en) | Method, system, equipment and medium for determining fault closure | |
| CN113622904B (en) | Method for identifying type of logging fluid by using chlorine ion content of element capture spectrum logging | |
| CN115238533B (en) | Slope block stability evaluation method, system and equipment and readable storage medium | |
| CN116150996A (en) | Method and device for determining dynamic wetting angle | |
| CN106948812B (en) | Method and device for determining permeability lower limit value of hypertonic zone | |
| CN116973630A (en) | Multilayer filling cave resistivity inversion method and device and electronic equipment | |
| CN107975364A (en) | Method and device for determining gas well limit sand discharge time | |
| EP3861381B1 (en) | Data structure for fast invasion percolation modeling software | |
| SA122430479B1 (en) | Downhole water removal tool | |
| CN109100802B (en) | Reservoir determination method and device | |
| US12044121B2 (en) | In-situ wettability measurement using multiple partitioning tracers | |
| CN112649871A (en) | Longitudinal wave reflection coefficient determining method and device, electronic equipment and storage medium | |
| US11566503B1 (en) | Oil recovery of a reservoir based on residual oil saturation | |
| US11905807B2 (en) | Workflow to model and condition water distribution in a hydrocarbon reservoir |
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 |