CN1538166A - Comprehensive detecting method for quality of well cementation - Google Patents
Comprehensive detecting method for quality of well cementation Download PDFInfo
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- CN1538166A CN1538166A CNA2003101076372A CN200310107637A CN1538166A CN 1538166 A CN1538166 A CN 1538166A CN A2003101076372 A CNA2003101076372 A CN A2003101076372A CN 200310107637 A CN200310107637 A CN 200310107637A CN 1538166 A CN1538166 A CN 1538166A
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Abstract
A method for comprehensive detecting the quality of well cementation features that the sonic well-logging instrument and gamma-gamma density well-logging instrument are put in the well via sleeve pipe, the signals above the medium state around said instruments are transmitted to ground instrument for recording them, and they are analyzed by computer to obtain the quality result. Its advantages are complete information and high precision.
Description
Technical field: the present invention relates to the improvement of oil field oil, well cementing quality detection method.
Background technology: because to the imperfection of the Interpreting Method of cementing quality well-log information, it is also not really desirable that the home and abroad cementing quality detects effect, influenced the normal exploitation in oil field.Mainly utilize acoustic logging method to detect oil, well cementing quality at present, find that in the process of using this method has some shortcomings, at first, several different cementing status of cement mantle show as identical feature (multi-solution of acoustic logging) sometimes in acoustic logging, secondly, acoustic logging is only to the cement plane sensitivity, and insensitive to the fixed situation of cement ring body itself, can not provide the compressive strength of cement mantle exactly.Also has some other cementing quality detection method as a supplement, also all there are some shortcomings in these methods, well logging can only detect the Media density of sleeve pipe and stratum annular space as gamma density and casing wall thickness, makes fluid existence form that density changes and position etc. and can not discern.Aspect the cementing quality explanation, so far still do not solve preferably such as problems such as the little ring in well cementation I interface, cement mantle compressive strength, well cementation II interface agglutination states, and explanation results only shows the cement bond state, does not have directly to provide result accurately at the purpose (interlayer packing state) of cementing the well.
Summary of the invention: the purpose of this invention is to provide a kind of cementing quality method for comprehensive detection, it has the acoustic logging of utilization and gamma-gamma density well-log information is had complementary advantages, the little ring in identification well cementation I interface, calculate cement mantle compressive strength, detect well cementation II interface agglutination state, detect the waterpower packing system that well cementation forms waterpower packing ability, to the testing result of cementing quality accurately, comprehensive characteristics.Method of the present invention is achieved in that puts into the down-hole respectively with acoustic logging instrument and gamma-gamma density well logger in oil well casing, the state of surveying instrument surrounding medium (sleeve pipe, cement mantle), the signal of measuring reaches surface instrumentation by cable and goes on record, by the analysis of computing machine, the quality of cementing the well is provided testing result to the survey record result:
To between the 30.0mV, the well section continuous length with this feature is greater than 2.0m at 3.4mV for A, acoustic logging casing wave range value, and cement mantle density then is the little ring in well cementation I interface more than or equal to the cement stone density of standard;
B, well cementation I interface do not have and vertically scurry logical, cement bond index BI greater than 0.4, when well cementation II interface agglutination is good or medium, and cement mantle compressive strength is:
Compressive strength=α PS+ β PM
In the formula: the strength of cement (MPa) of PS for obtaining by acoustic logging casing wave amplitude;
The strength of cement (MPa) of PM for obtaining by cement mantle density;
α, β are weight factor, when the cover external diameter of pipe is 140mm, and α=0.4, β=0.6;
C, utilize acoustic variable density log, gamma density well-log information and natural gamma ray log data, well cementation II interface agglutination state is carried out integrated interpretation, ripple two thresholding Tut, Tlt then are set in full-wave train, and the water cement ratio of preparation grout is provided with two boundary ρ ut, ρ lt of cement mantle density during according to cementing operation;
C-1, primary wave be then less than Tlt, density value ρ＞ρ ut, and then the II interface agglutination is good; ρ ut＞ρ＞ρ lt, II interface agglutination situation is uncertain;
C-2, primary wave are then greater than Tut, and the natural gamma value is big, ρ＞ρ lt, and then the II interface agglutination is good; The natural gamma value is little, ρ＜ρ lt, then is that the II interface agglutination is poor;
C-3, primary wave then between Tut, Tlt, ρ＞ρ ut, then the II interface agglutination is in good condition; ρ ut＞ρ＞ρ lt then carries out integration to formation wave, and when integrated value was big, the II interface agglutination was good; Integrated value hour is investigated the natural gamma ray log curve, and the natural gamma value is bigger, and medium for the II interface agglutination, otherwise the II interface agglutination is poor; ρ＜ρ lt, for the II interface agglutination poor;
D, the system defect parameter and the system strength parameter detecting result of decision cementing quality are integrated, good, medium, the difference of system's waterpower packing ability provided the result.The present invention directly detects at the well cementation purpose, sleeve pipe-cement mantle-stratum, as a waterpower packing system on vertically, detects its waterpower packing ability.Compare with cementing quality detection method in the past, on to the cementing quality detection, innovation is arranged.In the cementing quality method for comprehensive detection, multiple well-log information obtains comprehensively, the information that the participation cementing quality detects from less to more, testing result is from the one-parameter to the multiparameter, compressive strength to the little ring in well cementation I interface, well cementation II interface agglutination quality and cement mantle has provided accurate result, solved the multiresolution issue of cementing quality in detecting, the detection that compares cementing quality with in the past detection method is more accurate, comprehensive.
Description of drawings: Fig. 1 is a cementing quality comprehensive detection schematic flow sheet of the present invention.
Embodiment: present embodiment is achieved in that puts into the down-hole respectively with acoustic logging instrument and gamma-gamma density well logger in oil well casing, the state of surveying instrument surrounding medium (sleeve pipe, cement mantle), the signal of measuring reaches surface instrumentation by cable and goes on record, by the analysis of computing machine, explain the quality of well cementation to the survey record result:
To between the 30.0mV, the well section continuous length with this feature is greater than 2.0m at 3.4mV for A, acoustic logging casing wave range value, and cement mantle density then is judged as the little ring in well cementation I interface more than or equal to the cement stone density of standard.
B, do not have when well cementation I interface and vertically to scurry logical, cement bond index BI greater than 0.4, when well cementation II interface agglutination is good or medium, cement mantle compressive strength is:
Compressive strength=α PS+ β PM
In the formula: the strength of cement (MPa) of PS for obtaining by acoustic logging casing wave amplitude;
The strength of cement (MPa) of PM for obtaining by cement mantle density;
α, β are weight factor, when the cover external diameter of pipe is 140mm, and α=0.4, β=0.6
C, utilize acoustic variable density log, gamma density well-log information and natural gamma ray log data, well cementation II interface agglutination state is carried out integrated interpretation, ripple two thresholding Tut, Tlt then are set in full-wave train, and the water cement ratio of preparation grout is provided with two boundary ρ ut, ρ lt of cement mantle density during according to the investigation cementing operation;
C-1, when primary wave during then less than Tlt, if density value ρ＞ρ ut judges that the II interface agglutination is good; If ρ is ut＞ρ＞ρ lt, and II interface agglutination situation is uncertain;
C-2, when primary wave during then greater than Tut, if the natural gamma value is big, ρ＞ρ lt, judge that the II interface agglutination is good; If the natural gamma value is less, ρ＜ρ lt, it is poor then to be judged as the II interface agglutination;
C-3, when primary wave is then between Tut, Tlt, if ρ＞ρ ut judges that the II interface agglutination is in good condition; If ρ is ut＞ρ＞plt, then formation wave is carried out integration, and when integrated value was big, the II interface agglutination was good; Integrated value hour is investigated the natural gamma ray log curve, if the natural gamma value is bigger, it is medium to be judged as the II interface agglutination, otherwise the II interface agglutination is poor; If p＜plt, it is poor to be judged as the II interface agglutination;
D, the system defect parameter and the system strength parameter detecting result of decision cementing quality are integrated, good, medium, the difference of system's waterpower packing ability provided evaluation (seeing attached list 1).Again in conjunction with cement sealing length, and parameter such as geologic interlayer pressure difference, specifically judge the waterpower packing situation of the waterpower packing system that the oil-water well well cementation forms.The step of (referring to Fig. 1) oil-water well cementing quality comprehensive evaluation is:
I, collection uncased hole departure curves data (hole diameter, density of earth formations) and well cementation related data (sleeve pipe standard and cementing concrete pulp density).II, enforcement gamma density are logged well (C Γ Д T-HB), and are obtained cement density, casing wall thickness, sleeve pipe coefficient of excentralization by preliminary interpretation; Implement sector cement bond log (SBT), pre-service such as box cupling, filtering disappear to the log data that obtains.III, utilize each parametric synthesis interpretation procedure of cementing quality to provide well cementation I interface agglutination state (comprising the circumferential distribution of little ring and cement), well cementation II interface agglutination state, the strength of cement value of each depth point.IV, in conjunction with each parameter interpretation result of cementing quality, whether well cementation is reached that its fundamental purpose---interlayer waterpower packing ability provides evaluation.The automatic generation and the output of V, oil, well cementing quality comprehensive evaluation result map, table.
The waterpower packing ability integration of the waterpower packing system that subordinate list 1 well cementation forms is estimated
| Well cementation I interface agglutination state | Well cementation II interface agglutination state | Cement mantle compressive strength MPa | Waterpower packing ability integration is estimated |
| Good | Good | Greater than 8.0 | Good |
| Good | Medium | 4.0-8.0 | |
| Good | Uncertain | Greater than 8.0 | |
| Good | Good | 4.0-8.0 | |
| Good | Medium | Greater than 8.0 | |
| Medium | Good | Greater than 8.0 | |
| Medium | Good | 4.0-8.0 | |
| Medium | Medium | Greater than 8.0 | |
| Good | Uncertain | 4.0-8.0 | Medium |
| Medium | Medium | 4.0-8.0 | |
| Medium | Uncertain | Greater than 8.0 | |
| Medium | Uncertain | 4.0-8.0 | |
| Otherwise | Difference | ||
Claims (1)
1, cementing quality method for comprehensive detection, it is characterized in that it is achieved in that puts into the down-hole respectively with acoustic logging instrument and gamma-gamma density well logger in oil well casing, the state of surveying instrument surrounding medium, the signal of measuring reaches surface instrumentation by cable and goes on record, by the analysis of computing machine, cementing quality is provided testing result to the survey record result:
To between the 30.0mV, the well section continuous length with this feature is greater than 2.0m at 3.4mV for A, acoustic logging casing wave range value, and cement mantle density then is the little ring in well cementation I interface more than or equal to the cement stone density of standard;
B, well cementation I interface do not have and vertically scurry logical, cement bond index BI greater than 0.4, when well cementation II interface agglutination is good or medium, and cement mantle compressive strength is:
Compressive strength=α PS+ β PM
In the formula: the strength of cement (MPa) of PS for obtaining by acoustic logging casing wave amplitude;
The strength of cement (MPa) of PM for obtaining by cement mantle density;
α, β are weight factor, when the cover external diameter of pipe is 140mm, and α=0.4, β=0.6;
C, utilize acoustic variable density log, gamma density well-log information and natural gamma ray log data, well cementation II interface agglutination state is carried out integrated interpretation, ripple two thresholding Tut, Tlt then are set in full-wave train, and the water cement ratio of preparation grout is provided with two boundary ρ ut, ρ lt of cement mantle density during according to cementing operation;
C-1, primary wave be then less than Tlt, density value ρ＞ρ ut, and then the II interface agglutination is good; ρ ut＞ρ＞ρ lt, II interface agglutination situation is uncertain;
C-2, primary wave are then greater than Tut, and the natural gamma value is big, ρ＞ρ lt, and then the II interface agglutination is good; The natural gamma value is little, ρ＜ρ lt, then is that the II interface agglutination is poor;
C-3, primary wave then between Tut, Tlt, ρ＞ρ ut, the II interface agglutination is in good condition; ρ ut＞ρ＞ρ lt then carries out integration to formation wave, and when integrated value was big, the II interface agglutination was good; Integrated value hour is investigated the natural gamma ray log curve, and the natural gamma value is bigger, and medium for the II interface agglutination, otherwise the II interface agglutination is poor; ρ＜ρ lt, for the II interface agglutination poor;
D, the system defect parameter and the system strength parameter detecting result of decision cementing quality are integrated, good, medium, the difference of system's waterpower packing ability provided the result.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858210A (en) * | 2010-06-21 | 2010-10-13 | 中国海洋石油总公司 | Simulated test device for acoustic logging instrument |
| CN109882152A (en) * | 2019-02-22 | 2019-06-14 | 中国石油大学(华东) | A kind of micro-loop recognition methods between casing and cement sheath |
| CN109958432A (en) * | 2019-02-26 | 2019-07-02 | 中国石油天然气股份有限公司 | Method and device for evaluating cementing quality of well cementation II interface by utilizing ultrasonic echo logging |
| CN111827975A (en) * | 2019-04-10 | 2020-10-27 | 中国石油化工股份有限公司 | II interface well cementation quality evaluation method |
| CN112001095A (en) * | 2020-09-09 | 2020-11-27 | 中石化石油工程技术服务有限公司 | Method for establishing well cementation quality evaluation index and well cementation quality evaluation method |
| CN112253100A (en) * | 2020-10-15 | 2021-01-22 | 中海油田服务股份有限公司 | Method and device for determining well cementation quality |
| CN112593926A (en) * | 2020-12-10 | 2021-04-02 | 北京华晖探测科技股份有限公司 | Method and system for measuring cementing quality of cased well by using SH wave |
| CN115419393A (en) * | 2022-05-13 | 2022-12-02 | 中海石油(中国)有限公司海南分公司 | Plate method for evaluating interlayer packing performance of cement sheath |
-
2003
- 2003-10-23 CN CNA2003101076372A patent/CN1538166A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858210B (en) * | 2010-06-21 | 2013-05-15 | 中国海洋石油总公司 | Simulated test device for acoustic logging instrument |
| CN101858210A (en) * | 2010-06-21 | 2010-10-13 | 中国海洋石油总公司 | Simulated test device for acoustic logging instrument |
| CN109882152A (en) * | 2019-02-22 | 2019-06-14 | 中国石油大学(华东) | A kind of micro-loop recognition methods between casing and cement sheath |
| CN109958432A (en) * | 2019-02-26 | 2019-07-02 | 中国石油天然气股份有限公司 | Method and device for evaluating cementing quality of well cementation II interface by utilizing ultrasonic echo logging |
| CN109958432B (en) * | 2019-02-26 | 2021-11-02 | 中国石油天然气股份有限公司 | Method and device for evaluating cementing quality of well cementation II interface by utilizing ultrasonic echo logging |
| CN111827975B (en) * | 2019-04-10 | 2023-03-10 | 中国石油化工股份有限公司 | II interface well cementation quality evaluation method |
| CN111827975A (en) * | 2019-04-10 | 2020-10-27 | 中国石油化工股份有限公司 | II interface well cementation quality evaluation method |
| CN112001095A (en) * | 2020-09-09 | 2020-11-27 | 中石化石油工程技术服务有限公司 | Method for establishing well cementation quality evaluation index and well cementation quality evaluation method |
| CN112001095B (en) * | 2020-09-09 | 2023-08-04 | 中国石油化工集团有限公司 | Method for establishing well cementation quality evaluation index and well cementation quality evaluation method |
| CN112253100A (en) * | 2020-10-15 | 2021-01-22 | 中海油田服务股份有限公司 | Method and device for determining well cementation quality |
| CN112593926A (en) * | 2020-12-10 | 2021-04-02 | 北京华晖探测科技股份有限公司 | Method and system for measuring cementing quality of cased well by using SH wave |
| CN115419393A (en) * | 2022-05-13 | 2022-12-02 | 中海石油(中国)有限公司海南分公司 | Plate method for evaluating interlayer packing performance of cement sheath |
| CN115419393B (en) * | 2022-05-13 | 2023-04-25 | 中海石油(中国)有限公司海南分公司 | Plate method for evaluating interlayer packing performance of cement annular layer |
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