CN105587311A - Tracking and explaining method for whole steam injecting process of heavy oil horizontal well - Google Patents
Tracking and explaining method for whole steam injecting process of heavy oil horizontal well Download PDFInfo
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- CN105587311A CN105587311A CN201410573703.3A CN201410573703A CN105587311A CN 105587311 A CN105587311 A CN 105587311A CN 201410573703 A CN201410573703 A CN 201410573703A CN 105587311 A CN105587311 A CN 105587311A
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Abstract
The invention provides a tracking and explaining method for a whole steam injecting process of a heavy oil horizontal well. The method comprises the steps that in the steam injecting process, temperature and pressure data are recorded at any time; according to the temperature and pressure data in the steam injecting process, the economic steam injection amount is judged, and the reasonable well shutting opportunity is determined; in the well shutting process, the temperature and pressure data are recorded at any time; according to the temperature and pressure data in the well shutting process, the flow opening opportunity is judged; after flow opening is finished, temperature and pressure data in the whole process of steam injecting, well shutting and flow opening are recorded; and the temperature and pressure data in the whole process of steam injecting, well shutting and flow opening are combined with original multifunctional logging data to analyze steam suction producing conditions of all well segments of the heavy oil horizontal well, and arrangement of the position of a steam injection sieve pipe and design of the steam injection amount in the next period are guided. According to the method, the reasonable well shutting time and the reasonable flow opening time are automatically judged, and economic steam injection and economic oil extraction are achieved; the production conditions of reservoirs in all well segments are analyzed and explained, optimization of the position and the like of the steam injection sieve pipe in the next period is guided, and the aims of improving the yield of the horizontal well and improving the economic benefits are achieved.
Description
Technical field
The present invention relates to oil field development technical field, particularly relate to a kind of thick oil horizontal well steam injection tracking control of full process and explainMethod.
Background technology
The status of heavy crude reservoir in petroleum industry and effect are more and more important. In recent years, Oilfield using horizontal well technology makes limitThin heavy crude reservoir is efficiently employed, and the initial stage is obtained extraordinary effect. But limit portion reservoir is thin, serious heterogeneity, waterHorizontal well well segment length, reservoir is employed inequality, causes production capacity to be successively decreased soon. Although there are the technical monitorings such as five parameter well loggings each both at home and abroadVapour situation is inhaled on well section stratum, but these technology heatproof times are all lower, and maximum duration, less than ten hours, cannot meet noteThe monitoring of 10-20 days of vapour overall process needs. Therefore result and the stratum actual conditions of test are quite different. We invent for this reasonA kind of new thick oil horizontal well steam injection tracking control of full process means of interpretation, monitoring steam injection overall process temperature, pressure changes, in conjunction withReservoir properties is explained each well section suction vapour effect. The method is more rationally more reliable compared with conventional method.
Summary of the invention
The object of the invention is, for viscous crude steam injection, stewing well, open flow overall process well logging blank, provides a kind of and judges that stratumEconomic steam injection amount, more rational open flow opportunity, the each well section of analysis interpretation reservoir is employed situation, is subsequent cycle steam injection sievePipe position optimization and the optimization of steam injection amount provide foundation.
Object of the present invention can be achieved by the following technical measures: thick oil horizontal well steam injection tracking control of full process means of interpretation,This thick oil horizontal well steam injection tracking control of full process means of interpretation comprises: step 1, in steam injection process, enroll at any time temperature, number pressureAccording to, and temperature, pressure data in the steam injection process of admission are made an explanation; Step 2, according to temperature, pressure in steam injection processForce data judges economic steam injection amount, determines rationally stewing well opportunity; Step 3, enrolls temperature, number pressure in stewing well process at any timeAccording to, and temperature, pressure data in the stewing well process of admission are made an explanation; Step 4, according to temperature, pressure in stewing well processForce data judges open flow opportunity; Step 5, after open flow finishes, admission steam injection, stewing well, open flow overall process temperature, number pressureAccording to; And step 6, by the temperature of steam injection, stewing well, open flow overall process, pressure data and original multi-functional log data knotClose and explain that the each well section of thick oil horizontal well inhales vapour producing status, instruct the establishing of setting, steam injection amount of steam injection screen casing of lower cycle positionMeter.
Object of the present invention also can be achieved by the following technical measures:
This thick oil horizontal well steam injection tracking control of full process means of interpretation also comprises, before step 1, by under high temperature resistant armouring wireropeEnter thick oil horizontal well assigned address.
This is high temperature resistant, and armouring wirerope has 11 points for measuring temperature and 2 pressure taps.
In step 2, judge economic steam injection amount, pressure data auxiliary reference according to temperature variation curve.
In step 2, by judging that temperature rise amplitude determines economic steam injection amount, when the temperature rise amplitude of recommending is less than0.05%, think that near the suction of pit shaft vapour is saturated, well is boiled in a covered pot over a slow fire in blowing out.
In step 4, judge open flow opportunity, pressure data auxiliary reference according to temperature variation curve.
In step 4, in the time of measuring point temperature and pressure generation big ups and downs, heat exchange completes, and reaches open flow opportunity.
In step 6, by the temperature data of test and the porosity of original multi-functional well logging, former oil saturation, lithology theseData combination, explains each well section steam entry profile, analyzes each well section producing status, for steam injection screen casing position optimization of lower cycle,The configuration of steam injection amount provides foundation.
Thick oil horizontal well steam injection tracking control of full process means of interpretation of the present invention, for thick oil horizontal well steam injection before, stewing well,Open flow overall process judges stratum suction vapour situation without means of testing, cannot the each well section of accurate evaluation horizontal well employ asking of situationTopic. By armouring wirerope admission thick oil horizontal well steam injection, stewing well and many well points of open flow overall process temperature and pressure data, enterRow thick oil horizontal well temperature and pressure data recording and being written into; Be positioned to time and well depth, intelligent decision according to test dataStewing well opportunity, open flow opportunity; The each well section in test data and original multi-functional log data binding analysis stratum is inhaled effect for steam-operatingReally, optimize steam injection of lower cycle; Utilize global test data to be combined with the multi-functional decryption of well logging, judge each well section reservoirInhale vapour producing status, this invention is all suitable for the heavy crude reservoir of horizontal well development. Present invention includes the judgement on opportunity of stewing well,Judgement on open flow opportunity, has also comprised the each well section of horizontal well and has inhaled steam-operating with explaining, reach optimize the economic steam injection of thick oil horizontal well,Economic oil recovery, and guides steam injection of lower cycle. To heavy crude reservoir, upgrading is proposed effect exploitation and is played significance. With conventional logging pairRatio, utilizes thick oil horizontal well steam injection tracking control of full process means of interpretation more reliable, and has excellent that other technologies do not possessGesture. Its concrete advantage and feature show the following aspects:
1, the reliability of test data. Source data acquisition is stainless steel armouring wirerope, has 7 layers of insulation protection, the limitHeatproof 1500 is spent, and operating temperature 550 is spent, operating pressure 40Mpa, and acid-alkali-corrosive-resisting, waterproof insulation, can realize long-termRepeatedly retest. Complete at present time test of more than ten wells.
2, the stewing well of intelligent decision, open flow opportunity. Other measuring technologies can only image data, cannot realize real-time online and observeData, cannot judge and cannot be optimized stewing well, open flow opportunity to this cycle.
3, the reasonability of data analysis. Other measuring technology memory data outputs are few, generally with regard to tens data points, analyze knotFruit error is large. Image data of the present invention is greater than 20,000, comprises steam injection, stewing well, open flow overall process, even if there are indivedual dataPoint has error, does not also affect the accuracy of result. Analyzing reservoir while employing, the porosity of novelty and reservoir, lithology,Saturation degree binding analysis, result more meets the truth on stratum.
Brief description of the drawings
Fig. 1 is thick oil horizontal well steam injection tracking control of full process means of interpretation of the present invention one specific embodiment flow chart;
Fig. 2 is that embodiment armouring wirerope is lowered to schematic diagram.
Detailed description of the invention
For above and other object of the present invention, feature and advantage can be become apparent, cited below particularly go out embodiment, andCoordinate appended graphicly, be described in detail below.
In step 101, specify being lowered to thick oil horizontal well with the high temperature resistant armouring wirerope of 11 points for measuring temperature and 2 pressure tapsPosition. As shown in Figure 2. Flow process enters into step 102.
In step 102, in steam injection process, enroll at any time temperature, pressure data, and test data is imported to interpretation software. ?In one embodiment, utilize teletransmission technology in real time measuring point data to be transferred to well head receiving equipment. Flow process enters into step 103.
In step 103, judge economic steam injection amount according to test data, determine rationally stewing well opportunity. In one embodiment, rootJudge economic steam injection amount, pressure data auxiliary reference according to temperature variation curve. Judge principle: behind steam injection stratum, withThere is heat exchange in stratum, measuring point temperature increases. Along with the increase of injection rate, near pit shaft, inhale vapour saturated, progressively to stratumHeat exchange is carried out in deep, and pit shaft measuring point range of temperature is very little, does not substantially increase. In fact to earth formation deep heat exchangeEnergy reduce after viscosity of crude, due to distant, crude oil cannot flow to pit shaft, this part heat has been wasted.Therefore, by judging that temperature rise amplitude determines economic steam injection amount. The temperature rise amplitude of recommending is less than 0.05%, thinksNear pit shaft, inhale vapour saturated, can the stewing well of blowing out. Temperature, pressure jump point are because injection boiler is abnormal in one exampleBlowing out. Flow process enters into step 104.
In step 104, in stewing well process, enroll at any time temperature, pressure data, and test data is imported to interpretation software. StreamJourney enters into step 105.
In step 105, judge open flow opportunity according to temperature, pressure data in stewing well process. In one embodiment, according to temperatureDegree change curve judges open flow opportunity, pressure data auxiliary reference. Judge principle: inhale after vapour on viscous crude stratum, and temperature increases,Viscosity of crude significantly reduces, and mobility increases, and to Wellbore Flow, pushes with the liquid in pit shaft, causes measuring pointTemperature and pressure generation big ups and downs. Now heat exchange completes, and reaches open flow opportunity. Flow process enters into step 106.
In step 106, after open flow finishes, admission steam injection, stewing well, open flow overall process temperature, pressure data. Flow process entersTo step 107.
In step 107, by test data and the original multi-functional log data binding analysis of steam injection, stewing well, open flow overall processThe each well section of thick oil horizontal well is inhaled vapour producing status, instructs the setting of steam injection screen casing of lower cycle position, the design of steam injection amount. ?In one embodiment, by data such as the temperature data of test and the porositys of original multi-functional well logging, former oil saturation, lithologyIn conjunction with, explain each well section steam entry profile, analyze each well section producing status, be steam injection screen casing position optimization of lower cycle, steam injectionAmount configuration provides foundation.
In an application specific embodiment of the present invention, through test in 21 days, whole process was obtained 126772 groups of data. This well is formerDesign steam injection amount is 2500 tons according to Experience Design, is 2300 tons according to test optimization steam injection amount, reaches economic steam injection amount,Save steam injection and take 80,000 yuan. After this well drives a well, the production per cycle cycle of going up increases by 251 tons, obtains 100.4 ten thousand yuan of economic benefits.Add up to and make a profit 108.4 ten thousand yuan, obtain good economic benefit.
Claims (8)
1. thick oil horizontal well steam injection tracking control of full process means of interpretation, is characterized in that, this thick oil horizontal well steam injection tracking control of full process means of interpretation comprises:
Step 1, enrolls temperature, pressure data at any time in steam injection process, and temperature, pressure data in the steam injection process of admission are made an explanation;
Step 2, judges economic steam injection amount according to temperature, pressure data in steam injection process, determines rationally stewing well opportunity;
Step 3, enrolls temperature, pressure data in stewing well process at any time, and temperature, pressure data in the stewing well process of admission are made an explanation;
Step 4, judges open flow opportunity according to temperature, pressure data in stewing well process;
Step 5, after open flow finishes, admission steam injection, stewing well, open flow overall process temperature, pressure data; And
Step 6, is combined steam injection, stewing well, the temperature of open flow overall process, pressure data and explains the each well section suction of thick oil horizontal well vapour producing status with original multi-functional log data, instruct the setting of steam injection screen casing of lower cycle position, the design of steam injection amount.
2. thick oil horizontal well steam injection tracking control of full process means of interpretation according to claim 1, is characterized in that, this thick oil horizontal well steam injection tracking control of full process means of interpretation also comprises, before step 1, high temperature resistant armouring wirerope is lowered to thick oil horizontal well assigned address.
3. thick oil horizontal well steam injection tracking control of full process means of interpretation according to claim 2, is characterized in that, this is high temperature resistant, and armouring wirerope has 11 points for measuring temperature and 2 pressure taps.
4. thick oil horizontal well steam injection tracking control of full process means of interpretation according to claim 1, is characterized in that, in step 2, judges economic steam injection amount, pressure data auxiliary reference according to temperature variation curve.
5. thick oil horizontal well steam injection tracking control of full process means of interpretation according to claim 4, is characterized in that, in step 2, determine economic steam injection amount by judging temperature rise amplitude, when the temperature rise amplitude of recommending is less than 0.05%, think that near the suction of pit shaft vapour is saturated, well is boiled in a covered pot over a slow fire in blowing out.
6. thick oil horizontal well steam injection tracking control of full process means of interpretation according to claim 1, is characterized in that, in step 4, judges open flow opportunity, pressure data auxiliary reference according to temperature variation curve.
7. thick oil horizontal well steam injection tracking control of full process means of interpretation according to claim 6, is characterized in that, in step 4, in the time of measuring point temperature and pressure generation big ups and downs, heat exchange completes, and reaches open flow opportunity.
8. thick oil horizontal well steam injection tracking control of full process means of interpretation according to claim 1, it is characterized in that, in step 6, the temperature data of test is combined with the porosity of original multi-functional well logging, former oil saturation, these data of lithology, explain each well section steam entry profile, analyze each well section producing status, for steam injection screen casing position optimization of lower cycle, the configuration of steam injection amount provide foundation.
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| CN109538181A (en) * | 2017-09-22 | 2019-03-29 | 中国石油化工股份有限公司 | Improve the optimization method of side water heavy crude reservoir Simulation on whole pay zones effect |
| CN111411927A (en) * | 2020-03-30 | 2020-07-14 | 中国石油大学(华东) | Method for adjusting steam injection mode in steam huff and puff process |
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Application publication date: 20160518 |