CN102999650A - Method for designing sleeve failure expert system - Google Patents
Method for designing sleeve failure expert system Download PDFInfo
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- CN102999650A CN102999650A CN 201110290349 CN201110290349A CN102999650A CN 102999650 A CN102999650 A CN 102999650A CN 201110290349 CN201110290349 CN 201110290349 CN 201110290349 A CN201110290349 A CN 201110290349A CN 102999650 A CN102999650 A CN 102999650A
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Abstract
The invention discloses a method for designing a sleeve failure expert system. The method comprises the steps: (a) at first, designing an initial knowledge base; (b) then, developing and testing a prototype vehicle; and (c) finally, improving and summarizing the knowledge base, carrying out modifying experiments on the knowledge base and inference rules repeatedly, and summarizing a better complete result. The method can quickly complete the design of the sleeve failure expert system, is simple in operation steps and has an accurate operation result, and the analytical operation cost is greatly lowered.
Description
Technical field
The present invention relates to a kind of method of casing failure Expert System Design.
Background technology
The casing failure in oil field in the petroleum engineering field, is commonly called casing failure and casing deformation, is called for short " cover decreases cover and becomes ".Casing failure refers in oilfield process since the load that the factors such as engineering, geology, production dynamic change produce sleeve pipe cause when surpassing bearing capacity of casing sleeve pipe distortion, break, the general name of the damage type such as bad break.In the oilfield exploitation procedure, particularly the casing failure problem of oil-gas field development middle and later periods be perplex at present China and even All Around The World development of oil industry a chronic illness.It also is one of crucial difficult problem that affects the petroleum industry exploitation, increases the benefit.
In decades, the research of relevant oil gas field casing failure never is interrupted, huge manpower and materials have all been dropped into to the research of casing failure in the oil field of various countries, people are from oil geology, reservoir engineering, Materials Science and Engineering, rock mechanics, the mechanics of materials, geomechanics, permeation fluid mechanics, the multidisciplinary different angle such as corrosion electrochemistry is to the form of casing failure, the reason that casing failure produces, the numerical simulation of casing failure, the metering system of casing failure, the mechanism of casing failure and the control of casing failure, a large amount of research has been carried out in the aspects such as reparation, and has obtained certain achievement.But because casing failure the complex nature of the problem, above-mentioned study general all is for a certain oil field, block, specific hole condition carries out, the finite element analysis that numerical simulation is also carried out according to the very little regional area scope around the individual well often, shortage is considered the multidisciplinary overall on a large scale of the problems referred to above, and because as if a lot of problems in the casing failure be more suitable for adopting the mode of numerical simulation to analyze, therefore up to the present, yet nobody carries out the experience that casing failure is analyzed with people in decades, knowledge is concluded, carrying out expert system processes, so the improvement of casing failure problem is produced effects still very little at present, the sleeve in oil field Problem of Failure still occurs again and again, has become a great problem of restriction oil field development.
Add up to, the reason that causes sleeve in oil field to lose efficacy is a lot.People ascribe the reason of casing failure to geologic agent traditionally: such as mud stone imbibition, rock stratum creep, fault movements, formation sand production etc.; Engineering factor; Improper such as engineering design, the various construction operations such as the long-term high pressure water injection exploitation in the production run, fracture acidizing are improper etc.; Other factors: such as perforation problem, etching problem etc.And this inefficacy often is not a kind of result of factor effect, but because the interactional common result of multiple different factor.This has brought very large difficulty for the research work of casing failure.
From the angle of science, the casing failure in the oilfield development process, be actually buried Casing Failure in stratal configuration under the effect of rock stratum terrestrial stress and other physical chemical factor distortion and the result of damage.Be actually the result of sleeve structure thing and rock stratum terrestrial stress and other the factor interactions such as physical chemistry.Except damage such as picture corrosion etc. is to be subjected to chemical action or the electrochemical action factor affecting, the casing failure problem in oil field is nearly all relevant with the peripherally variation of stress of oil well.So in a sense, in fact the casing failure problem is exactly the sleeve structure thing and the problem that intercouples of the rock mass with pore fluid, has not only comprised the collapse resistance problem of shell material but also comprised the in process of production variation issue of oil-water well surrouding rock stress on every side here.
Existing a large amount of research work is verified, solve the casing failure problem in what a oil field, and the key issue of its core is to make the casing failure mechanism in this oil field clear, and this problem plays conclusive effect in the casing failure control.Just because of this reason, in decades, a large amount of casing failures and the research worker of control respectively for different oil field concrete conditions, have proposed many different casing failure mechanism theory.But because casing failure the complex nature of the problem, and the casing failure problem relates to nearly all production technical field in oil field, from oil field geologic, Drilling Design to completion technique; Adopting of the enforcement of the adjustment from the oil-water well producting rule to development plan, production measure and engineering measure makes the casing failure mechanism problem of inquiring into the oil field become very complicated.Particularly in recent years, development along with modern science and technology, petroleum industry has entered a brand-new developing stage, a large amount of uses of the appearance of the exploitation of viscous crude, deep-well, ultra deep well and orientation well, horizontal well, multiple wells and Multilateral Wells technology, so that in drilling process may increase the damage of sleeve pipe, more increase the probability of casing failure, increased the difficulty of definite casing failure mechanism.
Therefore, how can be from the great mass of data and process of complicated oil field geologic, engineering, design, construction, production development, well workover, as soon as possible, correct finding out causes sleeve in oil field inefficacy main cause, correct judgement sleeve in oil field failure mechanism is to solving and preventing that the sleeve in oil field Problem of Failure from being very important.
The Analysis on Mechanism of casing failure is a performing creative labour complexity, arduous.Be one and relate to oil field geologic, drilling engineering, whole development the establishment of the project and adjustment, the systems engineering of the every aspects such as employing of production measure; It is the core of preventing and treating targetedly, delay, solve the sleeve in oil field Problem of Failure.This work, equally to the oil field carry out new well construction geology, engineering design, and the adjustment of oilfield development program, the formulation of production measure all has very strong directive significance.
But sleeve in oil field failure cause and research on mechanism are judged, early stage all is to be finished by the brainstrust in this field, in recent years, along with the development of computer technology and the widespread use of Finite Element Method, and the deepening continuously of human understanding to rock mechanics, permeation fluid mechanics and plasto-elasticity, people have more and more used the method for numerical simulation to analyze the casing failure problem in the analysis of causes of a part of casing deformation, have formed the mode that adopts knowledge analysis and numerical analysis to lay equal stress on to the casing failure problem.Attaching undue importance to one thing to the neglect of the other all of any mode can not all solve the casing failure problem in oil field.And the employing knowledge analysis is main or namely allows to adopt numerical analysis, is the world that expert system is put ability to good use just but numerical analysis can not solve again the field of whole issue.Up to the present, the research that sleeve in oil field lost efficacy rests in the knowledge analysis or numerical analysis for single casing failure form basically, also nobody is engaged in and sets up a casing failure problem to all generations that can cover whole oil field, unify analyzing and processing efficiently, Expert System Study efficiently.Setting up one contains expert system that whole sleeve in oil field lost efficacy China and even global oil field is all had important theory significance and current meaning to the improvement of casing failure.
Axiomatic Design is divided into 4 territories with design problem.Design is " what is expected " and " How to choose is to satisfy the demands " interactional process.For this interactional procedures system has been introduced the concept in " territory ", " territory " is the separatrix of 4 different design activities, is an important foundation of Design In Axiomatic Design.Axiomatic Design thinks that design problem can be divided into 4 design domain: client territory (Consumer Domain), functional domain (Function Domain), domain (Physical Domain) and technique territory (Process Domain).Corresponding design element separately in each territory, be customer demand (CustomerNeeds), functional requirement (Function Requirements), design parameter (Design Parameters) and state-variable (Process Variables).
Different with general traditional design is that the design of expert system is a process that constantly repeats.The key of the system that sets up of success is the system that sets up as far as possible early, since a smaller system, progressively is extended for an experimental system that becomes better and approaching perfection day by day with considerable scale.
Summary of the invention
Purpose of the present invention is in order to overcome the deficiencies in the prior art and defective, a kind of method of casing failure Expert System Design is provided, and the method can be finished the casing failure Expert System Design fast, and operation steps is simple, operating result is accurate, greatly reduces the analysis operation cost.
Purpose of the present invention is achieved through the following technical solutions: a kind of method of casing failure Expert System Design may further comprise the steps:
(a) at first, design initial knowledge storehouse;
(b) then, carry out exploitation and the test of prototype;
(c) last, the improvement of carrying out knowledge base with conclude repeatedly the experiment of making amendment of knowledge base and inference rule, summarize more perfect result.
Described step (a) may further comprise the steps:
(a1) problem is more educated: and distinguish the name of the game of studying, what is such as the task that will solve, how he defines, and it could be decomposed into subproblem or subtask, and which typical data it comprises;
(a2) generalities of knowledge: namely summarize the needed key of the representation of knowledge and relation thereof, such as the data type, known conditions, and hypothesis and the control strategy of target, proposition;
(a3) formalization of concept: the data structure form of namely determining organization knowledge, the method for expressing handle of various knowledge key, subproblem and the information flow characteristic etc. relevant with generalities are transformed to more formal expression in the using artificial intelligence, and it comprises hypothesis space process model and data characteristic;
(a4) formal rule: namely establishment rules formalization computing machine perform statement and the program of knowledge transformation for being represented by programming language;
(a5) rule legalizes: namely confirm regularization the rationality of knowledge, the validity of inspection rule.
In the described step (b), after the expression way of selected knowledge, can embark the needed experiment subset of whole system, it comprises the typical knowledge of whole model, and only relates to enough simple task and the reasoning process relevant with experiment.
In the described step (c), the effort of 3 years several months to two of process makes system reach human expert's level in certain scope.
In sum, the invention has the beneficial effects as follows: can finish fast the casing failure Expert System Design, and operation steps is simple, operating result is accurate, greatly reduces the analysis operation cost.
Embodiment
Below in conjunction with embodiment, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited to this.
Embodiment:
The present invention relates to a kind of method of casing failure Expert System Design, may further comprise the steps:
(a) at first, design initial knowledge storehouse;
(b) then, carry out exploitation and the test of prototype;
(c) last, the improvement of carrying out knowledge base with conclude repeatedly the experiment of making amendment of knowledge base and inference rule, summarize more perfect result.
Described step (a) may further comprise the steps:
(a1) problem is more educated: and distinguish the name of the game of studying, what is such as the task that will solve, how he defines, and it could be decomposed into subproblem or subtask, and which typical data it comprises;
(a2) generalities of knowledge: namely summarize the needed key of the representation of knowledge and relation thereof, such as the data type, known conditions, and hypothesis and the control strategy of target, proposition;
(a3) formalization of concept: the data structure form of namely determining organization knowledge, the method for expressing handle of various knowledge key, subproblem and the information flow characteristic etc. relevant with generalities are transformed to more formal expression in the using artificial intelligence, and it comprises hypothesis space process model and data characteristic;
(a4) formal rule: namely establishment rules formalization computing machine perform statement and the program of knowledge transformation for being represented by programming language;
(a5) rule legalizes: namely confirm regularization the rationality of knowledge, the validity of inspection rule.
In the described step (b), after the expression way of selected knowledge, can embark the needed experiment subset of whole system, it comprises the typical knowledge of whole model, and only relates to enough simple task and the reasoning process relevant with experiment.
In the described step (c), the effort of 3 years several months to two of process makes system reach human expert's level in certain scope.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and any simple modification, the equivalent variations on every foundation technical spirit of the present invention above embodiment done all fall within protection scope of the present invention.
Claims (4)
1. the method for a casing failure Expert System Design is characterized in that, may further comprise the steps:
(a) at first, design initial knowledge storehouse;
(b) then, carry out exploitation and the test of prototype;
(c) last, the improvement of carrying out knowledge base with conclude repeatedly the experiment of making amendment of knowledge base and inference rule, summarize more perfect result.
2. the method for a kind of casing failure Expert System Design according to claim 1 is characterized in that, described step (a) may further comprise the steps:
(a1) problem is more educated: and distinguish the name of the game of studying, what is such as the task that will solve, how he defines, and it could be decomposed into subproblem or subtask, and which typical data it comprises;
(a2) generalities of knowledge: namely summarize the needed key of the representation of knowledge and relation thereof, such as the data type, known conditions, and hypothesis and the control strategy of target, proposition;
(a3) formalization of concept: the data structure form of namely determining organization knowledge, the method for expressing handle of various knowledge key, subproblem and the information flow characteristic etc. relevant with generalities are transformed to more formal expression in the using artificial intelligence, and it comprises hypothesis space process model and data characteristic;
(a4) formal rule: namely establishment rules formalization computing machine perform statement and the program of knowledge transformation for being represented by programming language;
(a5) rule legalizes: namely confirm regularization the rationality of knowledge, the validity of inspection rule.
3. the method for a kind of casing failure Expert System Design according to claim 1, it is characterized in that, in the described step (b), after the expression way of selected knowledge, can embark the needed experiment subset of whole system, it comprises the typical knowledge of whole model, and only relates to enough simple task and the reasoning process relevant with experiment.
4. the method for a kind of casing failure Expert System Design according to claim 1 is characterized in that, in the described step (c), the effort of 3 years several months to two of process makes system reach human expert's level in certain scope.
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| CN 201110290349 CN102999650A (en) | 2011-09-14 | 2011-09-14 | Method for designing sleeve failure expert system |
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| CN 201110290349 CN102999650A (en) | 2011-09-14 | 2011-09-14 | Method for designing sleeve failure expert system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100617A (en) * | 2017-04-20 | 2017-08-29 | 中国石油大学(北京) | A kind of method for simulating compact reservoir horizontal cementing defect inducing casing deformation |
| CN109508880A (en) * | 2018-11-12 | 2019-03-22 | 西南石油大学 | Cementing quality appraisal procedure based on ontology |
-
2011
- 2011-09-14 CN CN 201110290349 patent/CN102999650A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100617A (en) * | 2017-04-20 | 2017-08-29 | 中国石油大学(北京) | A kind of method for simulating compact reservoir horizontal cementing defect inducing casing deformation |
| CN109508880A (en) * | 2018-11-12 | 2019-03-22 | 西南石油大学 | Cementing quality appraisal procedure based on ontology |
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Application publication date: 20130327 |