CN1148132A - Dynamic method for monitoring the advanced direction of injected water into water injection well - Google Patents
Dynamic method for monitoring the advanced direction of injected water into water injection well Download PDFInfo
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- CN1148132A CN1148132A CN94115488A CN94115488A CN1148132A CN 1148132 A CN1148132 A CN 1148132A CN 94115488 A CN94115488 A CN 94115488A CN 94115488 A CN94115488 A CN 94115488A CN 1148132 A CN1148132 A CN 1148132A
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Abstract
The present invention relates to a method for determining water injection diffusion direction of water input well in petroleum engineering, and is characterized by that said testing technique uses the casing pipe of oil-water well as grounding body to supply power to stratum, and when making injection construction, a working liquor containing low-resistance body is injected into the stratum, and the surface measuring electrodes distributed around the water input well are used for dynamically monitoring surface potential variation due to diffusion of working liquor in stratum, and according to this variation it can determine the advancing direction of water injection and water-line advanced development process. Said method can provide important scientific basis for making dynamic analysis, injection and production regulation and detecting residual oil distribution, etc. for oil-field development.
Description
The present invention is a kind of measuring technology that is used for petroleum geology, petroleum production engineering mensuration water injection well water filling diffusion orientation.
In oilfield development process, be the raising flood effectiveness, prevent to inject water and advance by leaps and bounds along high permeability zone that to cause water logging be a crucial job, the main employing is radioactive tracer inter-well test technology in the prior art, this technology is to inject radioactive tracer by its radioactive activity of well sample analysis of being benefited when water injection well water filling operation on every side, come curve plotting to pass through analysis-by-synthesis according to the radioactive activity that records to curve, understand inject between anisotropic property between well and well fluid dynamically, reach the purpose of inter-well test with the method.The testing cost height of this measuring technology, test period is long, because the half-life of radioactive tracer is wayward, long half time, can influence construct once more, half-life is short, detects between well less than tracer and makes it probe material preparation difficulty, also exists in addition human body, environment, stratum are damaged and pollution problem.
The objective of the invention is to overcome weak point of the prior art and provide a kind of and utilize Casing Failure or oil pipe to do ground connector to power to the stratum, by to water injection well, the water filling interval injects low-resistance body running liquid, ground configuration annular test point utilizes dynamic monitor to monitor the measuring technology that spreads the ground potential variation that causes because of working solution.
Task of the present invention is finished by following measure.
In the water filling construction, contain a certain amount of dielectric low-resistance body running liquid to being injected by well logging water filling interval, this part injects the working solution on stratum can regard a field source as, because the existence of field source changes the distributional pattern of former electric field, utilizing Casing Failure to do ground connector powers to the stratum, make most of electric current focus on low resistance body band, cause that the current density in the stratum media reduces around the low-resistance body running liquid, by around by well logging ground, being circular layout to organize measuring points more, use high-precision current potential observation system, the variation of ground potential in the tracking and monitoring fluid injection work progress, carrying out data with computer at last handles, draw the potential change curve,, explain and infer the water injection well water injection propelling orientation according to analysis-by-synthesis to curve.
Accompanying drawing is the on-the-spot test schematic diagram.
Example among the present invention in conjunction with the accompanying drawings is described in further detail:
Provided according to condition of production needs by production unit by well logging, choose and selected a bite degree of depth more than or equal to by the return well of logging operation interval degree of depth well in the scope of well logging back 1000-3000 rice around by well logging as supply current, according to line electrode Calculating of Ground Resistance formula:
R＝ρ×ln(4L/d)/2πL
In the formula:
ρ-formation resistivity (Ω .m)
L-1/2 casing length (m)
D-casing diameter (m) learns that the depth of setting of ground connector and diameter are bigger, ground resistance is littler, so the ground connector of selecting Casing Failure or oil pipe to do to the stratum power supply is safe and reliable, before the on-the-spot water filling construction by the on-the-spot test schematic diagram equipment that installs instruments, current potential at fluid injection Pretesting normal field, after the stratum injection contains a certain amount of dielectric low-resistance body running liquid, survey the anomalous field potential difference again, selected low-resistance body running liquid and the resistivity contrasts between the surrounding formation rock at tens times between the hundreds of times, the test layer position is dark more, the test radius is big more, it is also big more then to inject the liquid measure that the stratum working solution goes into, during the pumping working solution, under the situation that is lower than broken pressure in stratum and liquid-injection equipment permission, improve the fluid injection pump pressure as far as possible.
Size according to in-place permeability, the measurement radius of how much choosing inside and outside two circles of reservoir quantity, the permeability height, reservoir quantity is big, then measure radius strengthens thereupon, central angle between two groups of adjacent test points of inner ring test point and outer ring test point is selected between 6 °-30 °, the test point of every circle is selected between 12-60, carry out sign in order and be circle-shaped cloth two circle multicore cables after choosing test point, connect two adjacent test points with this, cable is measured in the outer ring to be connected with DYL-1 type dynamic measuring instrument with inner ring measurement cable, transmitter is serially connected in by supply lines and is logged well and electric current returns between the well, the output of transmitter is sent into the down-hole through behind the current stabilization, squeeze into a measurement electrode at each the test point place that chooses, measurement electrode links to each other with multicore cable, in DYL-1 type dynamic measuring instrument sequential scanning collection, current potential difference between corresponding two survey marks in outer ring, for reducing the ground resistance of measurement electrode, to pour into a mould certain amount of fluid around the measurement electrode, test used measurement electrode all in surface deployment, finish after the above work in the fluid injection work progress potential change of tracking measurement anomalous field all the time, according to the formula of potential difference of total field: U
HMN=(1-N) U
AMN+ U
CMN+ U
BMN(1) U
QMN=U
AMN+ U
BMN(2) in the formula:
N-current division ratio;
U
AMN-being logged well produces in M, N two test points
Potential difference;
U
BMN-electric current returns well and produces in M, N two test points
Potential difference;
U
CMN-crack produces between M, N two test points
Potential difference;
U
QMN-normal field potential difference;
U
HMN-anomalous field potential difference;
Obtain following formula by (1) formula and (2) formula:
U
CMN＝(U
HMN-U
QMN)/N+U
AMN
Learn from formula, current division ratio, its size can only change the scale of potential difference between test point, can not change the form of curve, the voltage of being logged well is a constant, can only make curve along longitudinal axis translation, can not change its form, this shows that the value that potential difference deducts the normal field potential difference is the principal element of potential difference between reflection two test points, obtain following formula thus:
U
s=U
HMN-U
QMNIn the formula:
U
s-look pure abnormal electrical potential difference;
U
HMN-anomalous field potential difference;
U
QMN-normal field potential difference;
Can find out that from following formula pure abnormal potential extent is directly proportional with the length of low resistance body diffusion zone, in the fluid injection construction, along with the increase of fluid injection time, the lengthening of low resistance body diffusion zone, the variation of certain amplitude will take place in the electric potential signal of ground electric field.
At last the data input computer that records is handled, drawn potential difference according to the deal with data result and look pure abnormal curve,, infer and determine the growth course of water filling direction of propulsion and waterline through to the curve generalization analysis interpretation.
This measuring technology on-the-spot test expense is low, has only 1/5 of prior art expense, and construction technology is simple, convenient, reliability is high, measuring accuracy is high, the identical rate average out to 83.5% of test result and dynamic analysis, can be used for testing 4000 meters directions of well depth with interior water injection well water filling diffusion, test used low-resistance body running liquid to the pollution-free nothing corrosion of stratum and flow string, to rationally, formulate development plan economically important scientific basis is provided.
The explanation of accompanying drawing each several part.
(1) log well, (2) electric current returns well, (3) motor, (4) working solution inject band, (5) anomalous field electric current, (6) normal field electric current, (7) stratum media, (8) supply lines, (9) sleeve pipe, (10) outer ring measuring point, (11) inner ring measuring point, (12) outer ring measurement cable, (13) inner ring measurement cable, (14) DYL-1 type dynamic measuring instrument, (15) generator.
Claims (4)
1, a kind of technology that is used for petroleum geology, petroleum production engineering mensuration water injection well water filling dispersal direction is characterized in that:
A, quilt are logged well and electric current returns determining of well
Provided by production unit by well logging, to enroll the casing programme parameter of being logged well before the on-the-spot test, according to the casing programme parameter, 1000-3000 rice selects a bite well depth to return well more than or equal to the well of tested well test layer position as supply current with interior scope around being logged well, transmitter is being logged well and electric current returns between the well by the supply lines series connection, and is provided with the electric current of high stability to the stratum by sleeve pipe.
The selection of b, construction parameter
Inject working solution: select for use certain consumption to have the working solution of the solution of high ionization energy, inject liquid measure and decide according to well depth as the injection stratum.
The fluid injection pump pressure: the topping-up pump pressure-controlled is within the scope that is lower than the permission of formation fracture pressure and liquid-injection equipment.
The test radius: according to the size of in-place permeability, the measurement radius of how much determining inside and outside circle of reservoir quantity, it is big that permeability height, reservoir quantity greatly, are then measured radius.
The test point angle: with the quilt well logging is the center of circle, be the radial corresponding two circle measuring points of arranging, heart angle, garden is 6 °-30 ° between adjacent two measuring points, every circle is provided with 12-60 measuring point, each measuring point place squeezes into a measurement electrode, connect with multicore cable between adjacent two test points, the cable of inside and outside test circle is connected with dynamic measuring instrument.
Ground resistance: the regional the earth ground resistance of being logged well is less than 4 Ω.
C, fluid injection construction
Connect supply lines and measurement circuitry by test philosophy figure, measure earlier the normal field potential difference, at the scene the whole process of the fluid injection construction many groups potential difference between the tracking measurement Internal and external cycle all the time.
D, data are handled
The data input computer system that in-site measurement is enrolled is handled, drawn according to the data after handling and look pure abnormal electrical potential difference curve,, determine the direction of water filling propelling and the growth course that waterline advances by analysis, explanation to curve.
2, measuring technology according to claim 1 is characterized in that: test used measurement electrode all in surface deployment, what current electrode was selected for use is Casing Failure or oil pipe.
3, measuring technology according to claim 1 is characterized in that: this measuring technology can be used for the formation testing degree of depth in 4000 meters directions with interior water injection well water filling diffusion.
4, measuring technology according to claim 1 is characterized in that: low-resistance body running liquid of selecting for use and the resistivity contrasts between the surrounding formation rock at tens times between the hundreds of times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94115488A CN1052776C (en) | 1994-08-31 | 1994-08-31 | Dynamic method for monitoring the advanced direction of injected water into water injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94115488A CN1052776C (en) | 1994-08-31 | 1994-08-31 | Dynamic method for monitoring the advanced direction of injected water into water injection well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1148132A true CN1148132A (en) | 1997-04-23 |
| CN1052776C CN1052776C (en) | 2000-05-24 |
Family
ID=5037524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94115488A Expired - Lifetime CN1052776C (en) | 1994-08-31 | 1994-08-31 | Dynamic method for monitoring the advanced direction of injected water into water injection well |
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| Country | Link |
|---|---|
| CN (1) | CN1052776C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768370A (en) * | 2012-08-11 | 2012-11-07 | 吉林大学 | Hydrofracture fracture monitoring device and monitoring method based on electrokinetic coupling |
| CN103174405A (en) * | 2013-03-15 | 2013-06-26 | 中国石油天然气股份有限公司 | System and method for increasing injection to under-injection wells in oil field |
| CN104265276A (en) * | 2014-09-12 | 2015-01-07 | 中国石油集团长城钻探工程有限公司测井公司 | Specific resistance tracer agent based flow measuring method and flowmeter |
| CN105781520A (en) * | 2014-12-22 | 2016-07-20 | 中国石油天然气股份有限公司 | Ground surface blowout detecting method |
| CN105840185A (en) * | 2016-03-30 | 2016-08-10 | 大港油田集团有限责任公司 | Stable electric field horizontal well fracture crack monitoring method |
| CN106646635A (en) * | 2016-12-26 | 2017-05-10 | 张鑫 | Modified line source resistivity continuous measurement method |
| CN108387444A (en) * | 2018-04-02 | 2018-08-10 | 东方华隆（北京）石油技术有限公司 | A kind of continuous monitoring and control method of cased well pressure break based on well-in-situ potential imaging |
| CN109386252A (en) * | 2018-09-29 | 2019-02-26 | 北京大德广源石油技术服务有限公司 | Water-control fracturing yield increasing method for oil gas well |
| US20220074186A1 (en) * | 2018-12-03 | 2022-03-10 | Van Nam NGUYEN | Flush toilet |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103397879B (en) * | 2013-08-14 | 2014-09-10 | 中国石油大学(华东) | Reservoir parameter measurement system and method based on streaming potential |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076759A (en) * | 1993-02-16 | 1993-09-29 | 四川石油管理局川西南矿区机械厂 | Drilling fluid well kick, leakage, gas soak alarm |
-
1994
- 1994-08-31 CN CN94115488A patent/CN1052776C/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768370A (en) * | 2012-08-11 | 2012-11-07 | 吉林大学 | Hydrofracture fracture monitoring device and monitoring method based on electrokinetic coupling |
| CN102768370B (en) * | 2012-08-11 | 2015-10-28 | 吉林大学 | Based on hydraulically created fracture monitoring device and the monitoring method of dynamic electric coupling |
| CN103174405A (en) * | 2013-03-15 | 2013-06-26 | 中国石油天然气股份有限公司 | System and method for increasing injection to under-injection wells in oil field |
| CN103174405B (en) * | 2013-03-15 | 2015-10-14 | 中国石油天然气股份有限公司 | A kind of system and method for oil field under-injected well augmented injection |
| CN104265276A (en) * | 2014-09-12 | 2015-01-07 | 中国石油集团长城钻探工程有限公司测井公司 | Specific resistance tracer agent based flow measuring method and flowmeter |
| CN105781520A (en) * | 2014-12-22 | 2016-07-20 | 中国石油天然气股份有限公司 | Ground surface blowout detecting method |
| CN105840185A (en) * | 2016-03-30 | 2016-08-10 | 大港油田集团有限责任公司 | Stable electric field horizontal well fracture crack monitoring method |
| CN105840185B (en) * | 2016-03-30 | 2019-02-05 | 大港油田集团有限责任公司 | A kind of consistent electric field fractured horizontal well Crack Monitoring method |
| CN106646635A (en) * | 2016-12-26 | 2017-05-10 | 张鑫 | Modified line source resistivity continuous measurement method |
| CN108387444A (en) * | 2018-04-02 | 2018-08-10 | 东方华隆（北京）石油技术有限公司 | A kind of continuous monitoring and control method of cased well pressure break based on well-in-situ potential imaging |
| CN109386252A (en) * | 2018-09-29 | 2019-02-26 | 北京大德广源石油技术服务有限公司 | Water-control fracturing yield increasing method for oil gas well |
| US20220074186A1 (en) * | 2018-12-03 | 2022-03-10 | Van Nam NGUYEN | Flush toilet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1052776C (en) | 2000-05-24 |
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