CN101240706B - Annular space logging process of neutron gamma-ray logging instrument for well gadolinium-injecting labelling - Google Patents
Annular space logging process of neutron gamma-ray logging instrument for well gadolinium-injecting labelling Download PDFInfo
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- CN101240706B CN101240706B CN2008100177059A CN200810017705A CN101240706B CN 101240706 B CN101240706 B CN 101240706B CN 2008100177059 A CN2008100177059 A CN 2008100177059A CN 200810017705 A CN200810017705 A CN 200810017705A CN 101240706 B CN101240706 B CN 101240706B
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Abstract
The present invention relates to a method for executing annular space log by neutron gamma-ray log instrument in tracing gadolinium between wells, includes trifluoro three ethylene diamine gadolinium complex compound taken as tracer, confects water solution of trifluoro three ethylene diamine gadolinium complex compound, and injects the solution into water injection well. Gathering water solution sample from effluent in each oil production well, and measuring gadolinium content with mass spectrography in sample; before gadolinium does not arrive at oil well, annular space log is executed and well logging baseline is obtained; when gadolinium content of the sample is upwardly mobile, oil well is in annular space log by using annular space neutron gamma-logging instrument; variation curve of gamma count in layers changed with times is measured, obtaining water-bearing saturation degree, obtaining horizontal distribution of remaining oil saturation, obtaining longitudinal distribution of remaining oil saturation and obtaining horizontal distribution of each reservoir remaining oil saturation. The method decreases well logging number, does not affect oil production, can obtain horizontal distribution and longitudinal distribution of remaining oil saturation, and can obtain horizontal distribution of each reservoir remaining oil saturation.
Description
Technical field
The present invention relates to gadolinium-injecting labelling between a kind of well carries out annular space logging with the neutron-gamma logging appearance method.
Background technology
At present; Spike test is to inject and can carry the fluid slug with the fluid that has injected has mixed, dissolved tracer to injecting well between China's well; Follow the tracks of the fluid that has injected, and then with this tracer slug of same fluid displacement, thereby mark has injected the movement locus of fluid.This tracer that utilizes is followed the tracks of the injection fluid at the oil reservoir moving situation, and through on producing well, detecting the production performance characteristic of tracer, the method for research oil reservoir characteristic and production performance is exactly a tracer technique between well.It is a kind of method of direct mensuration oil reservoir characteristic, and the detected tracer concentration breakthrough curve of producing well has fed back the information of relevant oil reservoir characteristic and current mining.We just can be through observing the production performance (relation curve of tracer concentration and cumulative water production) of tracer in producing well like this; Like the break through of tracer at producing well; Parameters such as the tracer quantity of the total amount of the size of peak value and number, corresponding injection fluid, extraction are further studied and are familiar with the anisotropic property that involves situation and the characteristics of motion and oil reservoir that injects fluid.On the comprehensive study basis, formulate feasible raising oil field ultimate recovery adjustment measure.
" layering spike " monitoring between well has been carried out in some oil fields; Being actually injecting well adopts the layering injection string to accomplish the injection of II, the two-layer tracer of III; A bite well wants layering to inject multiple tracer; Its screening principle also need meet following requirement: do not react between (1) multiple tracer except routine requires; (2) multiple tracer can be analyzed simultaneously, does not disturb mutually; (3) injection rate is few, easy construction." layering spike " like this; Reality is difficult to reach the concrete parameter of each layer of layering research position; On each producing well, gather to carry the tracer water sample because all be at last; No matter tracer at which layer injects, and gets into the movement mechanism of tracer in porous media behind the stratum, controlled by convection action and hydrodynamics dispersion with injecting fluid.Convection action is the fluid mass motion that receives the Darcy's law domination; Thisly flow to be that barometric gradient on the oil reservoir produces by acting on; This barometric gradient of oil reservoir is by the pressure differential between injection-production well; Or the fluid density contrast that is flowing sets up, and convection action depends primarily on the character of oil reservoir, the shape and the operating condition of well pattern.The hydrodynamics disperse of fluid is made up of two parts: the diffusion of molecule and mechanical dispersion.The diffusion of molecule results from the component concentration gradient of being set up between two kinds of fluids, and it and flowing velocity are irrelevant, and mechanical dispersion then is the result that fluid particle moves in the tortuous duct in porous media.As long as there is the passage tracer to distribute in each layer position.Even adopt different tracers, also can't carry out layering and detect.
But such sampled measurements method; Spike test is from the selection of tracer, consumption design, the layout of tracer, the injection of tracer, the monitoring (sample frequency, sample analysis) of tracer between well; Explanation (quantitative or qualitative interpretation) until final result; Constituted tracer technique system between a complete well, any one link goes wrong, and all can bring disaster to the reliability of spike test data between well.Some oil field is exactly owing to problem occurred in a certain link, causes the failure of spike scheme, has wasted great amount of manpower and material resources, and such lesson is all arranged both at home and abroad.The more important thing is and do not know the contribution of tracer peak by which layer position, its contribution is not promptly known the distribution along depth.Do not know the contribution share of each degree of depth stratum tracer, can not effectively analyze and estimate each stratum to peak value.
Summary of the invention
Technical problem to be solved by this invention is to deficiency of the prior art; Provide gadolinium-injecting labelling between a kind of well to carry out the method for annular space logging with the neutron-gamma logging appearance; This method can analyze the contribution share of each degree of depth reservoir tracer to peak value, and each reservoir is effectively analyzed and estimated.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopts is: gadolinium-injecting labelling carries out the method for annular space logging with the neutron-gamma logging appearance between a kind of well, may further comprise the steps:
(1) adopt the complex compound trifluoro triethylenediamine of element gadolinium to close gadolinium complex Gd (en)
3F
3Be Gd (H
2N-CH
2-CH
2-NH
2)
3F
3As tracer;
(2) transfer even trifluoro triethylenediamine to close the gadolinium complex aqueous solution in the well site, make that gadolinium concentration is 0.25%～5% in the solution;
(3) by the job practices of conventional neutron life time log, spider tubing string or ball-and-seat tubing string under water injection well inject water injection well with the complex solution of mixing well in the step (2);
(4) in each producing well ground output liquid of well group, gather the production fluid sample, with the gadolinium concentrations in the said sample of mass spectrometric determination;
(5) before gadolinium does not arrive oil well, adopted annular space neutron-gamma logging appearance that oil well is carried out annular space logging one time earlier, obtain the well logging baseline; When the content of gadolinium in the extraction liquid sample in the step (4) is on the rise, adopted the every interval of annular space neutron-gamma logging appearance one day that oil well is carried out annular space logging one time;
(6) according to step (5), obtain each reservoir neutron gamma of oil well by the annular space logging result and count curve over time, try to achieve the water saturation of each reservoir again according to said change curve, thereby confirm reservoir interwell communication property and remaining oil saturation; Try to achieve vertical distribution of remaining oil saturation by log; The horizontal distribution of each reservoir interwell communication property and remaining oil saturation.
According to the invention cross neutron gamma ray measure portion that annular space neutron-gamma logging appearance comprises magnetic orientator from top to bottom, is connected with magnetic orientator, joint that is connected with neutron gamma ray measure portion and the source bar that is connected with joint,
241Am-Be neutron source and chamber, source; Neutron gamma ray measure portion lower end is provided with gamma-ray probe, and neutron gamma ray measure portion inside is the electronic circuit part; The source bar with have
241The chamber, source of Am-Be neutron source connects.
The appearance of annular space neutron-gamma logging excessively maximum outside diameter according to the invention is 28.0mm.
The present invention compares with prior art and has the following advantages:
(1) adopt the trifluoro triethylenediamine to close gadolinium complex as tracer, soluble in water, be insoluble to oil, high-temperature stability is good; Neutron-capture cross section (probability) is big, and consumption is less, nontoxic, "dead" pollution; Be prone to detect; Particularly neutron gamma yield is high, has both helped laboratory measurement, also helps neutron-gamma logging and measures.
(2) method that adopts sampling test and annular space logging to combine reduces the well logging number of times.
(3) adopted annular space neutron-gamma logging method, and do not influence oil recovery, annular space logging carries out with oil recovery simultaneously.
(4) can understand the tracer gadolinium complex at first from which layer output, monitoring layering tracer breakthrough situation, the monitoring stratum is with seepage flow situation between the well of the degree of depth and reservoir physics characteristic.
(5) horizontal distribution of remaining oil saturation can be tried to achieve, vertical distribution of remaining oil saturation can also be tried to achieve, or the horizontal distribution of each reservoir remaining oil saturation.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
The structural representation of crossing annular space neutron-gamma logging appearance that Fig. 1 adopts for the present invention.
Description of reference numerals:
The 1-magnetic orientator; 2-neutron gamma ray measurement section 3-gamma-ray probe;
Divide;
Chamber, 4-source; 5-source bar; The 6-joint.
The specific embodiment
As shown in Figure 1, cross neutron gamma ray measure portion 2 that annular space neutron-gamma logging appearance comprises magnetic orientator 1 from top to bottom, is connected with magnetic orientator 1, joint 6 that is connected with neutron gamma ray measure portion 2 and the source bar 5 that is connected with joint 6,
241Am-Be neutron source and chamber, source 4; Neutron gamma ray measure portion 2 lower ends are provided with that gamma-ray probe 3, neutron gamma ray measure portion 2 are inner to be the electronic circuit part, source bar 5 with have
241The chamber, source 4 of Am-Be neutron source connects.Crossing annular space neutron-gamma logging appearance maximum outside diameter is 28.0mm.
That adopts said structure crosses annular space neutron-gamma logging appearance, the invention provides gadolinium-injecting labelling between a kind of well and carries out the method for annular space logging with the neutron-gamma logging appearance, may further comprise the steps:
(1) adopt the complex compound trifluoro triethylenediamine of element gadolinium to close gadolinium complex Gd (en)
3F
3Be Gd (H
2N-CH
2-CH
2-NH
2)
3F
3As tracer;
(2) transfer even trifluoro triethylenediamine to close the gadolinium complex aqueous solution in the well site, make that gadolinium concentration is 0.25%～5% in the solution;
(3) by the job practices of conventional neutron life time log, spider tubing string or ball-and-seat tubing string under water injection well inject water injection well with the complex solution of mixing well in the step (2);
(4) in each producing well ground output liquid of well group, gather the production fluid sample, with the gadolinium concentrations in the said sample of mass spectrometric determination;
(5) before gadolinium does not arrive oil well, adopted annular space neutron-gamma logging appearance that oil well is carried out annular space logging one time earlier, obtain the well logging baseline; When the content of gadolinium in the extraction liquid sample in the step (4) is on the rise, adopted the every interval of annular space neutron-gamma logging appearance one day that oil well is carried out annular space logging one time;
(6) according to step (5), obtain each reservoir neutron gamma of oil well by the annular space logging result and count curve over time, try to achieve the water saturation of each reservoir again according to said change curve, thereby confirm reservoir interwell communication property and remaining oil saturation; Try to achieve vertical distribution of remaining oil saturation by log; The horizontal distribution of each reservoir interwell communication property and remaining oil saturation.
Claims (2)
1. gadolinium-injecting labelling carries out the method for annular space logging with the neutron-gamma logging appearance between a well, it is characterized in that may further comprise the steps:
(1) adopt the complex compound trifluoro triethylenediamine of element gadolinium to close gadolinium complex Gd (en)
3F
3Be Gd (H
2N-CH
2-CH
2-NH
2)
3F
3As tracer;
(2) transfer even trifluoro triethylenediamine to close the gadolinium complex aqueous solution in the well site, make that gadolinium concentration is 0.25%～5% in the solution;
(3) by the job practices of conventional neutron life time log, spider tubing string or ball-and-seat tubing string under water injection well inject water injection well with the complex solution of mixing well in the step (2);
(4) in each producing well ground output liquid of well group, gather the production fluid sample, with the gadolinium concentrations in the said sample of mass spectrometric determination;
(5) before gadolinium does not arrive oil well, adopted annular space neutron-gamma logging appearance that oil well is carried out annular space logging one time earlier, obtain the well logging baseline; When the content of gadolinium in the extraction liquid sample in the step (4) is on the rise, adopted the every interval of annular space neutron-gamma logging appearance one day that oil well is carried out annular space logging one time; Said cross neutron gamma ray measure portion that annular space neutron-gamma logging appearance comprises magnetic orientator from top to bottom, is connected with magnetic orientator, joint that is connected with neutron gamma ray measure portion and the source bar that is connected with joint,
241Am-Be neutron source and chamber, source, neutron gamma ray measure portion lower end is provided with gamma-ray probe, neutron gamma ray measure portion inside is the electronic circuit part, the source bar with have
241The chamber, source of Am-Be neutron source connects;
(6) according to step (5), obtain each reservoir neutron gamma of oil well by the annular space logging result and count curve over time, try to achieve the water saturation of each reservoir again according to said change curve, thereby confirm reservoir interwell communication property and remaining oil saturation; Try to achieve vertical distribution of remaining oil saturation, the horizontal distribution of each reservoir interwell communication property and remaining oil saturation by log.
2. gadolinium-injecting labelling carries out the method for annular space logging with the neutron-gamma logging appearance between well according to claim 1, it is characterized in that said to cross annular space neutron-gamma logging appearance maximum outside diameter be 28.0mm.
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| CN101787884B (en) * | 2010-01-28 | 2013-03-13 | 中国石油集团川庆钻探工程有限公司 | Method for judging fluid type of reservoir through acoustic porosity-neutron porosity differential |
| CN101832133B (en) * | 2010-01-28 | 2013-03-20 | 中国石油集团川庆钻探工程有限公司 | Method for judging reservoir fluid type of difference between density porosity and neutron porosity |
| CN101806215B (en) * | 2010-03-05 | 2013-05-01 | 中国石油集团川庆钻探工程有限公司 | Method for judging reservoir fluid type with irreducible water saturation data |
| CN106845786B (en) * | 2016-12-26 | 2021-01-29 | 中国石油天然气股份有限公司 | Method and device for evaluating reservoir connectivity between injection well and production well |
| CN109577966A (en) * | 2018-11-29 | 2019-04-05 | 四川富利斯达石油科技发展有限公司 | Using the method for tracer monitoring individual well residual oil saturation |
| CN109707373B (en) * | 2018-12-17 | 2022-06-14 | 西安石油大学 | Horizontal well-vertical well bidirectional tracing method based on fluid production profile test and inter-well tracing |
| CN110376661B (en) * | 2019-07-19 | 2020-10-30 | 中国地质大学（北京） | Underground inter-well single-river sand body comparison method and device |
| CN112360440A (en) * | 2020-10-27 | 2021-02-12 | 陕西华晨石油科技有限公司 | Water injection well array gamma logging device and method for performing intrastratal subdivision logging |
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|---|---|---|---|---|
| US5322126A (en) * | 1993-04-16 | 1994-06-21 | The Energex Company | System and method for monitoring fracture growth during hydraulic fracture treatment |
| US5949069A (en) * | 1997-11-14 | 1999-09-07 | Western Atlas International, Inc. | Method and apparatus for measuring volumetric water flow rates in highly inclined wellbores |
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