CN101749014B - Simulated formation testing device for carbon-to-oxygen ratio spectrum logging and application method - Google Patents
Simulated formation testing device for carbon-to-oxygen ratio spectrum logging and application method Download PDFInfo
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- CN101749014B CN101749014B CN 200910255763 CN200910255763A CN101749014B CN 101749014 B CN101749014 B CN 101749014B CN 200910255763 CN200910255763 CN 200910255763 CN 200910255763 A CN200910255763 A CN 200910255763A CN 101749014 B CN101749014 B CN 101749014B
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Abstract
The invention relates to a simulated formation testing device for carbon-to-oxygen ratio spectrum logging with double source distances and an application method. In the technical scheme of the device, a sleeve axially penetrates along the axial direction of a test tube, a carbon-to-oxygen ratio gamma spectrum probe is inserted in one end of the sleeve, a scale rod is inserted in the other end of the sleeve, a cement ring is jacketed outside the sleeve, the middle part of the test tube is provided with a baffle in the direction vertical to the cement ring so that two closed annular cavities can be formed in the test tube, a SiO2 microsphere is respectively filled in either annular cavity, and the outer wall of the test tube is provided with a liquid tube and a filler hole. The device can be applied to simulate the formation porosity and the formation with oil saturation. The invention establishes a simulated formation testing device and lays a foundation for detection of the parameters of a simulated formation with different changes in porosity and saturation. The device also has the advantages of simple structure, high operability, easy filler filling process, easy saturation control, high reliability, high measurement precision, easy maintenance and low cost, has advanced and innovative performances in both the technology and the structural design.
Description
Technical field
The present invention relates to double source apart from simulated formation testing device and the application process of carbon-to-oxygen ratio spectrum logging.
Background technology
Along with old filed production enters later development, judge that accurately high remaining oil saturation layer position is the key that keeps the old filed stable yields.Because oil district's oil-gas reservoir type is varied, the non-homogeneity of reservoir plane and interlayer, the isostructure unusual complexity of tomography etc. factor, determined this district to keep aspect difficulty such as stable yields situation and effective raising oil recovery very big, directly monitoring reservoir oil saturation Changing Pattern is one of vital task of well logging work always in cased well.In numerous methods, carbon-to-oxygen ratio gamma spectrometry log (C/O) can pass steel sleeve and cement sheath, obtain information such as formation lithology, oil saturation, degree of porosity, this method is not owing to influenced by formation water salinity substantially, be applicable to most of oil field, therefore in many years in the past, obtained using widely at China's onshore oil field, obtained technical economic benefit preferably.
Because carbon-to-oxygen ratio spectrum logging is subjected to the influence of spacing, investigative range is more shallow, influenced by borehole environment and formation condition simultaneously, has restricted the further application of this technology.
Summary of the invention
The present invention is intended to carry out scale and correction by stratum and borehole environment information that simulated formation testing device for carbon-to-oxygen ratio spectrum logging and application process are gathered length spacing probe, with High Water Cut Reservoir Remaining Oil Distribution in the scrutiny, the exact evaluation effect of reservoir development, the dynamic monitoring level of raising old filed.
Technical scheme of the present invention comprises:
Simulated formation testing device for carbon-to-oxygen ratio spectrum logging is: axially be penetrated with sleeve pipe along test barrel, one end of sleeve pipe inserts carbon-to-oxygen ratio gamma spectra probe, the other end inserts the scale bar, jacket exterior suit cement sheath, vertical cement sheath direction arranges dividing plate in the test barrel middle part, make the toroidal cavity that forms two sealings in the test barrel, in toroidal cavity, fill SiO
2Microballoon is respectively equipped with liquid pipe and stuffing hole at the test barrel outer wall of two toroidal cavity correspondences, and the liquid pipe is provided with valve, the stuffing hole capping.
Described SiO
2Microballoon adopts the atresia SiO of diameter 0.01～5.00mm
2Microballoon.Bottom in test barrel is provided with base.
The application process of simulated formation testing device for carbon-to-oxygen ratio spectrum logging is: at first accurately measure the volume of test barrel, use SiO
2Two toroidal cavities of the full test barrel of microballoon filling, accurately weighing test barrel quality; Then test barrel is vacuumized more than 30 minutes, under 20 ℃ to the abundant saturation water of the test barrel behind the vacuum well; Remove connecting tube at last, dry test barrel outer wall, the quality of 20 ℃ of down accurate weighing test barrel this moment; Repeat prior process 3-5 time, calculate degree of porosity average according to the stereometer of saturation water, by adjusting SiO
2The diameter of micro ball portfolio ratio simulates degree of porosity respectively and is 25% and 35% stratum.
After the implementation process of finishing the simulated formation degree of porosity, add saturated oils, water respectively from two liquid pipes of test barrel, with the gas in the abundant discharge slit; Insert carbon-to-oxygen ratio gamma spectra probe along sleeve pipe one end then, the other end inserts the scale bar; Enter the different degree of depth by scale bar record carbon-to-oxygen ratio gamma spectra probe, the carbon-to-oxygen ratio spectrum logging instrument draws the profit saturation ratio of different depth, and final to realize simulating oil saturation be 0%, 25%, 50%, 100% stratum.
Described hydromining pure water, saturated oils adopts not volatile machine oil or the lower crude oil of viscosity.
Technique scheme is the principle that influenced by spacing according to investigation depth, the carbon-to-oxygen ratio spectrum logging instrument can adopt double source apart from the probe detection mode, the information of long space probe detection stratum and borehole environment, short space is popped one's head in the main detecting shaft and the information of cement sheath, integrated interpretation can be eliminated the influence of borehole fluid and cement sheath, improve to measure and explain precision, the reduction logging cost reduces flow chart.Set up simulated formation testing device, for the simulated formation parameter of surveying different aperture degree, saturation ratio variation lays the foundation.
Remarkable result of the present invention is: fill combination atresia SiO in experimental facilities respectively
2It is two kinds of stratum of 25% and 35% that microballoon is simulated degree of porosity, fills saturated oils and water, can simulate oil saturation from 0%～100% continually varying stratum by the mobile test probe.The experiment of in experimental facilities, logging well, research institute surveys C/O log response feature, extract the carbon-to-oxygen ratio spectrum logging response characteristic data of oil reservoir, water layer and different saturation reservoir, set up double source apart from carbon/oxygen log saturation ratio interpretation chart, and by the oil reservoir of real well and the field data of water layer, the bearing calibration of research carbon/oxygen log curve is the interpretation and evaluation of the correct application of test pit experimental data and the actual well-log information of the carbon-to-oxygen ratio basis that theorizes.Simultaneously graduation apparatus is simple in structure, workable, filler filling is simple, saturation ratio is easy to control, reliability and certainty of measurement height, easy maintenance, and cost is low, all has advance and novelty on technology and structure design.
Description of drawings
Accompanying drawing is the structural representation of a kind of embodiment of apparatus of the present invention.
The specific embodiment
The present invention is described further below in conjunction with drawings and Examples.
Referring to accompanying drawing, test barrel 1 adopts 10mm welded steel plate tubular (side or garden) shell, length 4500mm, and the feeding port 3 that two salable Φ 500mm * 200mm have the expansion space is left in the top, and the bottom has the correspondence of two band valve Φ 25mm to advance leakage fluid dram 5 and base 6.Seal diaphragm 11 is set in the middle of the test barrel 1, and with tube each toroidal cavity that is divided into two, one of them toroidal cavity is used for filling saturated oils as saturated oils stratum 10, and another toroidal cavity is used for filling water as water stratum 9.The axial centre of test barrel 1 is the normal sleeve 2 of external diameter 140mm, internal diameter 125mm, and skin adds the thick cement sheath of 30mm 4, has one to lead to movably scale bar 8 of outside in the sleeve pipe, to show probe 7 degree of depth that enter at any time.Two interior atresia SiO with many specifications of 0.01～5.00mm of toroidal cavity
2The microballoon combination is filled full.The hydromining pure water, general not volatile machine oil, diesel oil or the lower crude oil of viscosity of adopting of oil.
Application process 1: the implementation process of simulated formation degree of porosity is test barrel and the SiO to be measured that at first is ready to a precise volumes in the carbon/oxygen log instrument simulated formation testing device
2Microballoon is with SiO
2Microballoon fills in the test barrel and suitably vibration tamping, is full of test barrel, with the accurate weighing test barrel of 1/10000 balance quality.Then test barrel is placed to vacuumize on the vacuum plant more than 30 minutes, under 20 ℃ to the abundant saturation water of the test barrel behind the vacuum well.Remove connecting tube at last, dry test barrel outer wall, 20 ℃ are descended the accurate weighing quality of test barrel at this moment; Record data repeat prior process 3 times, calculate degree of porosity average according to the stereometer of saturation water.It is 25% and 35% stratum that Using such method simulates degree of porosity respectively.
Application process 2: based on the above method, the implementation process of simulated formation profit saturation ratio is to fill SiO in the carbon/oxygen log instrument calibration simulated formation testing device
2In the jar behind the microballoon respectively the inlet at the bottom of the jar 5 slowly add saturated oils, water, with the gas in the abundant discharge slit.The hydromining pure water, general not volatile machine oil or the lower crude oil of viscosity of adopting of oil gets final product, and the overfill that profit can not add will leave certain expansion space with the variation of the condition of conforming, and closes the feed liquor valve, the airtight and watertight padding mouth after the profit filling finishes.The degree of depth difference that carbon-to-oxygen ratio gamma spectra probe enters, the saturation ratio of profit are just different, and the degree of depth that probe enters can be by reading on the deep calibration bar, and equivalence is corresponding profit saturation ratio.According to the experimental facilities requirement, realize that simulating oil saturation by the mobile test probe is 0%, 25%, 50%, 100% stratum.
Claims (5)
1. the application process of a simulated formation testing device for carbon-to-oxygen ratio spectrum logging, it is characterized in that: the structure of described experimental facilities is: axially be penetrated with sleeve pipe along test barrel, one end of sleeve pipe inserts carbon-to-oxygen ratio gamma spectra probe, the other end inserts the scale bar, jacket exterior suit cement sheath, vertical cement sheath direction arranges dividing plate in the test barrel middle part, makes the toroidal cavity that forms two sealings in the test barrel, fills SiO in toroidal cavity
2Microballoon is respectively equipped with liquid pipe and stuffing hole at the test barrel outer wall of two toroidal cavity correspondences, and the liquid pipe is provided with valve, the stuffing hole capping; At first accurately measure the volume of test barrel, use SiO
2Two toroidal cavities of the full test barrel of microballoon filling, accurately weighing test barrel quality; Then test barrel is vacuumized more than 30 minutes, under 20 ℃ to the abundant saturation water of the test barrel behind the vacuum well; Remove connecting tube at last, dry test barrel outer wall, the quality of 20 ℃ of down accurate weighing test barrel this moment; Repeat prior process 3-5 time, calculate degree of porosity average according to the stereometer of saturation water, by adjusting SiO
2The diameter of micro ball portfolio ratio simulates degree of porosity respectively and is 25% and 35% stratum.
2. the application process of simulated formation testing device for carbon-to-oxygen ratio spectrum logging according to claim 1, it is characterized in that: after the implementation process of finishing the simulated formation degree of porosity, add saturated oils, water respectively from two liquid pipes of test barrel, with the gas in the abundant discharge slit; Insert carbon-to-oxygen ratio gamma spectra probe along sleeve pipe one end then, the other end inserts the scale bar; By carving
Degree bar record carbon-to-oxygen ratio gamma spectra probe enters the different degree of depth, and the carbon-to-oxygen ratio spectrum logging instrument draws the profit saturation ratio of different depth, and final to realize simulating oil saturation be 0%, 25%, 50%, 100% stratum.
3. the application process of simulated formation testing device for carbon-to-oxygen ratio spectrum logging according to claim 2 is characterized in that: described hydromining pure water, the saturated oils not volatile machine oil of employing or the lower crude oil of viscosity.
4. the application process of simulated formation testing device for carbon-to-oxygen ratio spectrum logging according to claim 1 is characterized in that: described SiO
2Microballoon adopts the atresia SiO of diameter 0. 01～5.00mm
2Microballoon.
5. according to the application process of claim 1 or 4 described simulated formation testing device for carbon-to-oxygen ratio spectrum logging, it is characterized in that: the bottom in test barrel is provided with base.
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| CN 200910255763 CN101749014B (en) | 2009-12-22 | 2009-12-22 | Simulated formation testing device for carbon-to-oxygen ratio spectrum logging and application method |
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| CN 200910255763 CN101749014B (en) | 2009-12-22 | 2009-12-22 | Simulated formation testing device for carbon-to-oxygen ratio spectrum logging and application method |
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| CN101749014B true CN101749014B (en) | 2013-07-03 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606136B (en) * | 2012-04-01 | 2013-03-06 | 中国石油大学(华东) | Logging-while-drilling value response law simulated experimental device |
| CN105243220B (en) * | 2015-10-26 | 2018-06-19 | 中国海洋石油总公司 | The method that fluid influences in annular space is eliminated in RPM-C/O well loggings |
| CN105467467A (en) * | 2015-12-23 | 2016-04-06 | 西京学院 | Manufacture technology of standard module used for carbon-dioxide ratio energy spectrum well |
| US10156137B2 (en) * | 2017-03-06 | 2018-12-18 | Saudi Arabian Oil Company | Determining a rock formation content |
| CN106958443B (en) * | 2017-05-02 | 2020-10-09 | 长江大学 | Method and system for correcting carbon-oxygen ratio logging drilling fluid invasion influence factors |
| CN111781328A (en) * | 2020-05-14 | 2020-10-16 | 中国海洋石油集团有限公司 | Drilling fluid mud cake generation test shaft simulation mechanism and system |
| CN111965731B (en) * | 2020-08-14 | 2023-10-20 | 中国海洋石油集团有限公司 | Testing device and testing equipment |
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| CN1098763A (en) * | 1993-08-09 | 1995-02-15 | 清华大学 | Carbon/carbon/oxygen energy spectrum logging system |
| GB2376523A (en) * | 2001-03-30 | 2002-12-18 | Schlumberger Holdings | Multiple measurements borehole detector with segmented sensors |
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2009
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098763A (en) * | 1993-08-09 | 1995-02-15 | 清华大学 | Carbon/carbon/oxygen energy spectrum logging system |
| GB2376523A (en) * | 2001-03-30 | 2002-12-18 | Schlumberger Holdings | Multiple measurements borehole detector with segmented sensors |
Non-Patent Citations (6)
| Title |
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| Benchmarking Computer Simulations of Neutron-induced, Gamma-ray Spectroscopy for Well Logging;Richard C. ODOM et al.;《Applied Radiation and Isotopes》;19971231;第48卷(第10-12期);1322-1323 * |
| C/O测井响应随源距变化的理论研究;郑华等;《测井技术》;19981231;第22卷(第2期);79-82 * |
| C/O测井对地层孔隙度与含油饱和度响应的理论研究;王喆;《吉林大学硕士学位论文》;19991231;17-19、24 * |
| RichardC.ODOMetal..BenchmarkingComputerSimulationsofNeutron-induced Gamma-ray Spectroscopy for Well Logging.《Applied Radiation and Isotopes》.1997 |
| 王喆.C/O测井对地层孔隙度与含油饱和度响应的理论研究.《吉林大学硕士学位论文》.1999, |
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