CN110410062B - Implementation method of real-time production monitoring-downhole control of thickened oil SAGD horizontal well - Google Patents
Implementation method of real-time production monitoring-downhole control of thickened oil SAGD horizontal well Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 238000010796 Steam-assisted gravity drainage Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 48
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 19
- 238000013461 design Methods 0.000 claims abstract description 10
- 238000004088 simulation Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003921 oil Substances 0.000 claims description 27
- 239000010779 crude oil Substances 0.000 claims description 12
- 230000000704 physical effect Effects 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 239000000295 fuel oil Substances 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 230000003628 erosive effect Effects 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000013178 mathematical model Methods 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 3
- -1 reservoir thickness Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000011161 development Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000003027 oil sand Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000011158 quantitative evaluation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/2406—Steam assisted gravity drainage [SAGD]
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/11—Locating fluid leaks, intrusions or movements using tracers; using radioactivity
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
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Abstract
The invention discloses a method for monitoring yield of a thickened oil SAGD horizontal well and implementing well completion, which comprises the following steps: collecting and analyzing the data of the oil reservoir; determining the position and the number of the horizontal well subsection monitoring; building a well geological and numerical simulation model; selecting ICD/FCD type and determining parameters of inflow control completion equipment; determining the using amount of the tracer agent in each monitoring section; real-time downhole monitoring is carried out according to the segmented monitoring requirement; calculating an oil production/water production profile; analyzing the size of underground FCD regulation and control and related parameters; implementing downhole production profile control; the monitoring is repeated until the tracer monitoring design life time is over. The invention has the advantages that: the outstanding problems that the traditional liquid production profile monitoring operation cycle is long, the operation cost is high, the operation risk is large, the liquid production profile is not controlled timely and the like are effectively solved.
Description
Technical Field
The invention relates to the technical field of thickened oil development, in particular to a thickened oil SAGD horizontal well production monitoring interpretation and intelligent control integrated well completion implementation method.
Background
With the development of thick oil/oil sand, Steam Assisted Gravity Drainage (SAGD) technology has become one of the key technologies for the efficient development of thick oil/oil sand. In 1981, Bulter firstly proposed SAGD technology, which adopts double horizontal wells to recover thick oil/oil sand, and the basic principle is that steam of a heat conduction and heat convection source is used for heating formation crude oil, the steam expands vertically and laterally in a reservoir to heat the formation crude oil, and the heated crude oil and condensate flow to a production well below an oil layer under the action of gravity to be recovered. To evenly expand the SAGD steam cavity, the field is completed with a completion using either fixed or adjustable Inflow Control valves (ICD) or FCD).
The two traditional underground inflow profile monitoring and controlling processes are mutually independent, so that the problems that the interpretation and testing of the liquid production profile is long in action period, high in cost, high in operation risk, untimely in control of the liquid production profile and the like are caused, and the development effect of the thickened oil SAGD horizontal well is seriously influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for monitoring the yield of a thickened oil SAGD horizontal well and implementing well completion, which can effectively solve the problems in the prior art.
In order to realize the purpose, the technical scheme adopted by the invention is as follows:
a method for implementing real-time production monitoring-downhole control of a thickened oil SAGD horizontal well comprises the following steps:
s1, collecting and analyzing the data of the oil reservoir, wherein the data comprises: geology, well logging, core analysis, well drilling well track; realizing SAGD horizontal well near zone refinement characteristic description, the refinement characteristic includes: interlayer, reservoir thickness, gas cap, water cap, reservoir permeability;
s2, preliminarily determining the position and the number of horizontal well subsection monitoring according to the SAGD horizontal well refinement feature description result; the basic principle of horizontal well sectional optimization is that a high-quality reservoir body is preferred, and an interval layer with similar or consistent physical properties is adopted, namely a good interval layer and a good interval layer are adopted; preferably, the interval which shows physical property and crude oil as I and II reservoir beds and is relatively concentrated is divided into a unit, the interval which shows physical property and crude oil as III and IV reservoir beds is used as a unit, and the reservoir beds are segmented by using a separator; in addition, the subsection of the separator requires a well diameter regular section, the change rate of the well diameter is less than 5%, and a high permeability zone is not generated when the well logging interpretation is continuously 10 m;
s3, establishing a geological and numerical simulation model of the SAGD horizontal well by using geological modeling and oil reservoir numerical simulation software based on SAGD horizontal well refinement feature description results and the number and positions of the primary horizontal well monitoring segments;
s4, combining different types of FCD completion tool parameters and oil reservoir crude oil physical property parameters, optimizing the number of SAGD inflow control segments by adopting an oil reservoir numerical simulation means, selecting FCD types and determining related parameters of inflow control completion devices, wherein the related parameters comprise: the size of the pressure drop and the number of holes; the pressure drop design of the production well is in the range of the order of kPa;
s5, selecting tracer monitoring types and determining the tracer dosage of each monitoring section by considering the underground temperature and pressure conditions of the heavy oil SAGD and the underground monitoring time;
s6, designing a horizontal well output monitoring and intelligent control integrated well completion tool according to the segmented monitoring requirement;
s7, putting a horizontal well production monitoring and intelligent control integrated well completion tool into the SAGD well, and performing real-time underground monitoring;
s8, determining oil production/water production profiles of different positions of the horizontal well section through calculation and analysis by combining an erosion model and a flowback mathematical model according to the change conditions of concentration curves of different types of tracers monitored by the well mouth;
s9, simulating and analyzing the underground FCD regulation and control size and related parameters by combining a numerical simulation method according to the horizontal well subsection liquid production monitoring result, wherein the related parameters comprise: the pressure drop size, the number of holes and the design order range of the pressure drop of the production well;
s10, controlling the size of each FCD in the well by using ground wireless communication signals, and implementing the control of the production profile in the well;
s11, repeating S8 and S10 every 3 or 6 months as required by the production dynamics refinement description until the tracer monitoring design life time is over.
Compared with the prior art, the invention has the advantages that:
the underground output condition is determined according to different types of tracer flowback conditions at different positions, underground inflow control is realized by using a wellhead infinite communication means, monitoring-underground inflow control integration is realized, the outstanding problems that the traditional production profile monitoring operation period is long, the operation cost is high, the operation risk is high, the production profile control is not timely and the like are effectively solved, and the high-efficiency development of the heavy oil SAGD horizontal well is realized.
Drawings
FIG. 1 is a graph of the concentration of four different types of tracers in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by the following embodiments.
A method for monitoring production of a thickened oil SAGD horizontal well and implementing well completion comprises the following steps:
s1, collecting and analyzing related data such as geology, well logging, core analysis, well drilling well track and the like of an oil reservoir, and realizing the description of SAGD horizontal well near-wellbore zone fine characteristics (interlayer, reservoir thickness, gas cap, water jacking, reservoir permeability and the like);
s2, preliminarily determining the position and the number of horizontal well subsection monitoring according to the SAGD horizontal well refinement feature description result; the basic principle of horizontal well sectional optimization is that a high-quality reservoir body is preferred, and an interval layer with similar or consistent physical properties is adopted, namely a good interval layer and a good interval layer are adopted; preferably, the interval in which the physical property and crude oil are well displayed (i.e., well logging is interpreted as a type i and a type ii reservoir) and relatively concentrated is divided into one unit, while the interval in which the physical property and crude oil are poor displayed (i.e., well logging is interpreted as a type iii and a type iv reservoir) is divided into one unit, and the reservoir is divided by using a separator. In addition, the subsection of the separator requires a well diameter regular section (the well diameter change rate is generally less than 5%), and a logging interpretation is continuous for 10m without a high permeability zone;
s3, establishing a geological and numerical simulation model of the horizontal well by using geological modeling and oil reservoir numerical simulation software based on SAGD horizontal well refined description results and the number and positions of primary horizontal well monitoring subsections;
and S4, combining parameters of different types of ICD/FCD (orifice plate type, flow channel type and the like) well completion tools and oil reservoir crude oil physical parameters, optimizing the number of SAGD inflow control segments by adopting an oil reservoir numerical simulation means, preferably selecting the types of ICD/FCD and determining related parameters (pressure drop size, hole number and the like) of inflow control well completion devices. Production well pressure drop designs should be in the kPa order of magnitude range,
s5, considering the underground temperature and pressure conditions of the heavy oil SAGD and the underground monitoring time, preferably selecting the tracer monitoring type, and determining the tracer dosage of each monitoring section;
s6, designing a horizontal well output monitoring and intelligent control integrated completion tool according to the segmented monitoring requirements (the structure of the horizontal well output monitoring and intelligent control integrated completion tool is disclosed in the Chinese patent with the application number 201910445108.4 and is not elaborated herein);
s7, putting a horizontal well production monitoring and intelligent control integrated well completion tool into the SAGD well, and performing real-time underground monitoring; (the method for using the horizontal well production monitoring and intelligent control integrated well completion tool is disclosed in the Chinese patent of application No. 201910445108.4, and will not be elaborated here)
S8, determining oil production/water production profiles of different positions of the horizontal well section through calculation and analysis by combining an erosion model and a flowback mathematical model according to the change conditions of concentration curves of different types of tracers monitored by the well mouth;
s9, simulating and analyzing the underground FCD regulation and control size and related parameters by combining a numerical simulation method according to the horizontal well subsection liquid production monitoring result, wherein the related parameters comprise: the pressure drop size, the number of holes and the design order range of the pressure drop of the production well;
s10, controlling the size of each FCD in the well by using ground wireless communication signals, and implementing the control of the production profile in the well;
s11, repeating S8 and S10 every interval (3 months or 6 months, interval time adjustable) according to production dynamic refinement requirements until the end of tracer monitoring design life time.
As shown in figure 1, the relationship curve between the tracer and the production time monitored by four different tracer series (tracer series 1, tracer series 2, tracer series 3 and tracer series 4 concentration curves, and each tracer is installed at different positions of a horizontal well) shows that the time of different tracers is different and the peak value is also different, so that the quantitative analysis and evaluation of the flow at different positions of the horizontal well can be realized according to the occurrence time and the concentration peak of the different monitored tracers, and a theoretical basis is provided for real-time regulation and control of each FCD parameter in the well.
It will be appreciated by those of ordinary skill in the art that the examples described herein are intended to assist the reader in understanding the manner in which the invention is practiced, and it is to be understood that the scope of the invention is not limited to such specifically recited statements and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
Claims (1)
1. A method for implementing real-time production monitoring-downhole control of a thickened oil SAGD horizontal well is characterized by comprising the following steps:
s1, collecting and analyzing the data of the oil reservoir, wherein the data comprises: geology, well logging, core analysis, well drilling well track; realizing SAGD horizontal well near zone refinement characteristic description, the refinement characteristic includes: interlayer, reservoir thickness, gas cap, water cap, reservoir permeability;
s2, preliminarily determining the position and the number of horizontal well subsection monitoring according to the SAGD horizontal well refinement feature description result; the basic principle of horizontal well sectional optimization is that a high-quality reservoir body is preferred, and an interval layer with similar or consistent physical properties is adopted, namely a good interval layer and a good interval layer are adopted; preferably, the interval which shows physical property and crude oil as I and II reservoir beds and is relatively concentrated is divided into a unit, the interval which shows physical property and crude oil as III and IV reservoir beds is used as a unit, and the reservoir beds are segmented by using a separator; in addition, the subsection of the separator requires a well diameter regular section, the change rate of the well diameter is less than 5%, and a high permeability zone is not generated when the well logging interpretation is continuously 10 m;
s3, establishing a geological and numerical simulation model of the SAGD horizontal well by using geological modeling and oil reservoir numerical simulation software based on SAGD horizontal well refinement feature description results and the number and positions of the primary horizontal well monitoring segments;
s4, combining different types of FCD completion tool parameters and oil reservoir crude oil physical property parameters, optimizing the number of SAGD inflow control segments by adopting an oil reservoir numerical simulation means, selecting FCD types and determining related parameters of inflow control completion devices, wherein the related parameters comprise: the size of the pressure drop and the number of holes; the pressure drop design of the production well is in the range of the order of kPa;
s5, selecting tracer monitoring types and determining the tracer dosage of each monitoring section by considering the underground temperature and pressure conditions of the heavy oil SAGD and the underground monitoring time;
s6, designing a horizontal well output monitoring and intelligent control integrated well completion tool according to the segmented monitoring requirement;
s7, putting a horizontal well production monitoring and intelligent control integrated well completion tool into the SAGD well, and performing real-time underground monitoring;
s8, determining oil production/water production profiles of different positions of the horizontal well section through calculation and analysis by combining an erosion model and a flowback mathematical model according to the change conditions of concentration curves of different types of tracers monitored by the well mouth;
s9, simulating and analyzing the underground FCD regulation and control size and related parameters by combining a numerical simulation method according to the horizontal well subsection liquid production monitoring result, wherein the related parameters comprise: the pressure drop size, the number of holes and the design order range of the pressure drop of the production well;
s10, controlling the size of each FCD in the well by using ground wireless communication signals, and implementing the control of the production profile in the well;
s11, repeating S8 and S10 every 3 or 6 months as required by the production dynamics refinement description until the tracer monitoring design life time is over.
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| CN112593928B (en) * | 2020-05-29 | 2023-08-25 | 中国海洋石油集团有限公司 | Method for long-term monitoring of medium-high water content horizontal well production fluid profile by using tracer |
| CN111648764B (en) * | 2020-07-20 | 2021-03-19 | 西南石油大学 | Interpretation and evaluation method for underground distributed temperature monitoring output profile of multilayer gas reservoir |
| CN114607330B (en) * | 2020-12-04 | 2024-07-30 | 中国石油天然气股份有限公司 | Flow controller simulation test device and method based on long horizontal well |
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