CN105589987A - Artificial gas cap and edge water two-way drive development reservoir screening and evaluating method for fault block oil reservoir - Google Patents
Artificial gas cap and edge water two-way drive development reservoir screening and evaluating method for fault block oil reservoir Download PDFInfo
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- CN105589987A CN105589987A CN201410638163.2A CN201410638163A CN105589987A CN 105589987 A CN105589987 A CN 105589987A CN 201410638163 A CN201410638163 A CN 201410638163A CN 105589987 A CN105589987 A CN 105589987A
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Abstract
The invention provides an artificial gas cap and edge water two-way drive development reservoir screening and evaluating method for a fault block oil reservoir. The method comprises the following steps: (1), developing fine strata comparison and structural interpretation of a candidate fault block oil reservoir, establishing a reservoir geologic model, and determining a reservoir parameter; (2), establishing a reservoir numerical model, developing development history fitting, and correcting the reservoir geologic model and the reservoir parameter; (3), analyzing the potential of increasing the reservoir recovery ratio through two-way drive, and demonstrating the necessity of developing two-way drive development; and (4), judging whether the candidate fault block oil reservoir is suitable for two-way drive development or not according to the corrected reservoir parameter. By means of the artificial gas cap and edge water two-way drive development reservoir screening and evaluating method for the fault block oil reservoir, the problem that a screening and potential-evaluating method of a two-way drive development unit of a fault block oil reservoir having extra-high water-cut stage is undefined and nonstandard can be solved; and thus, the technical application effect of increasing the recovery ratio by developing two-way drive in the last period of development of the fault block oil reservoir and the development adjustment plan compiling level can be effectively increased.
Description
Technical field
The present invention relates to fault block oil reservoir development technique field, specially refer to ultra-high water cut stage fault block oil reservoir and utilize crestal gas injectionForm artificial gas cap and form the two-way exploitation oil reservoir adaptability screening and assessment method of driving of edge water drive in conjunction with the water filling of low position.
Background technology
Eastern China oil district Complex Fault Block Oil Reservoir generally has higher formation clination, and viscosity of crude is low and have a spy of a deckle waterPoint. In such oil reservoir development, conventionally adopt the high waterflooding development mode of adopting of top rare, the low note in close limit, go through exploitation for many years,Enter the ultra-high water-containing stage. For present stage structure high-order bit ridge one line, tomography angle remaining oil Local enrichment district scaleLittle, bore new well without economic benefit; Waist and the entirety water logging of low position, but still the movable remaining oil generally distributing to a certain degree,But further improve and involve the problem that difficulty is large, proposed to form secondary pneumatic jack gravity row by crestal gas injection and driven draining, withAquifer injection combination, artificial gas cap-Bian water bi-directional drive improves the skill of Local enrichment and general remainder of distribution oil recovery simultaneouslyArt thinking. In the exploitation of investigation Oilfields, obtain by the displacement of reservoir oil of gas injection assisted gravity for primary pneumatic jack and limit water oil reservoirGood development effectiveness, as multiple field use such as oil field, Huo Jinsi oil fields in western Haake uncle, has all obtained success. But,Compared with external reservoir condition, domestic fault block oil reservoir is at reserves scale, core intersection, and the aspects such as original oil columns existDeficiency, and differ greatly between unit, many without primary pneumatic jack, and be exploitation middle and later periods, moisture height, the equal shadow of these factorsRing artificial gas cap-Bian water two-way development effectiveness of driving, therefore, two-wayly drive technology and be not suitable for all faulted blocks unit, having mustFormulate the two-way exploitation reservoir selection condition of driving of fault block oil reservoir, for this reason we study invented a kind of fault block oil reservoir artificial gas cap-The two-way exploitation reservoir selection evaluation method of driving of limit water, instructs two-way development block screening and technology application, the solution of driving of fault block oil reservoirThe above technical problem of having determined.
Summary of the invention
The object of this invention is to provide one has effectively improved the fault block oil reservoir development later stage and has carried out the two-way raising recovery efficiency technique that drivesTwo-way the driving of fault block oil reservoir artificial gas cap-Bian water of effect and developing adjustment scheme establishment level developed reservoir selection evaluationMethod.
Object of the present invention can be achieved by the following technical measures: the two-way exploitation oil reservoir that drives of fault block oil reservoir artificial gas cap-Bian waterScreening and assessment method, the two-way exploitation reservoir selection evaluation method of driving of this fault block oil reservoir artificial gas cap-Bian water comprises: step 1,Carry out the meticulous Strata Comparison of candidate's fault block oil reservoir and structure interpretation, implement oil deposit parameter, set up geological model of oil accumulation; Step 2,Set up numerical reservoir model, carry out on developing history matching basis, revise geological model of oil accumulation and oil deposit parameter; Step 3,Analyze two-way driving and improve oil recovery potentiality, demonstration is carried out two-way necessity of driving exploitation; And step 4, according to correctionOil deposit parameter, judge that whether this candidate's fault block oil reservoir is applicable to the two-way exploitation of driving.
Object of the present invention also can be achieved by the following technical measures:
In step 1, the exploitation later stage is than more rich geology, well logging, well logging, seismic data, dynamic these data,Carry out meticulous Strata Comparison and structure interpretation, implement these oil deposit parameter of reservoir geologic character, reservoir properties and fluid properties,Set up geological model of oil accumulation.
In step 2, carry out reservoir numerical simulation, set up numerical reservoir model, develop history matching, revise geologyModel and oil deposit parameter, comprise level and vertical permeability, each substratum oil-water interfaces, water energy, oil viscosityThese parameters, meanwhile, the current major oil reservoir are-al remaining oil of the selective analysis regularity of distribution, evaluates boundary fault shutoff.
In step 3, two according to reservoir oil water distribution feature, at present well pattern hole condition and theoretical recovery ratio Analyzing on SizeImprove oil recovery potentiality to driving, demonstration is carried out two-way necessity of driving exploitation.
In step 3, improve Water Under when current well pattern and drive recovery ratio and be starkly lower than theoretical recovery ratio, and exist at presentIn the situation of tomography corner, the structure high-order bit remaining oil Local enrichment that well pattern difficulty is employed, possess and two-wayly drive further raising and adoptThe potentiality of yield.
In step 4, choose oil columns, oil-containing strip width, underground viscosity of crude, core intersection, level and verticalPermeability and these oil deposit parameter of limit water condition, according to practicable oil deposit parameter, with reference to being applicable to carrying out two-way waterflooding development oilThe screening and assessment condition of hiding, and overall merit, judge that whether this candidate's fault block oil reservoir is applicable to the two-way exploitation of driving, and determines whetherBe applicable to the whole district or part series of strata and local well group and be applicable to carrying out the two-way exploitation of driving.
In step 4, screening and assessment condition comprises: 1. boundary fault shutoff is good, and reservoir development is stable; 2. original containingDeep-fried twisted dough sticks bandwidth > 300m, oil column height is greater than 50m; 3. oil viscosity < 10mPa.s; 4. core intersection 3-10m;5. level, vertical permeability are larger, and gas injection well point oil saturation is higher and the certain Edge water energy of tool is favourable.
The two-way exploitation reservoir selection evaluation method of driving of fault block oil reservoir artificial gas cap-Bian water in the present invention, for ultra-high water cut stageFault block oil reservoir, by setting up fault block oil reservoir characteristic model, utilizes reservoir numerical simulation analytical method, affects fault block in evaluationOil reservoir is two-way to be driven on main sensitive parameter basis, has formulated the two-way exploitation oil deposit parameter screening conditions of driving, and comprises main sensitivityThe original oil columns of parameter (> 50m), oil-containing strip width (> 300m), underground viscosity of crude (< 10mPa.s)And compared with parameter requests such as water conditions at the bottom of sensitive parameter permeability, core intersection, limit, solve ultra-high water cut stage fault block oilHide two-way development block screening and indefinite, the nonstandard problem of Assessment Method on Potential of driving, effectively improved fault block oil reservoir and openedSend out the later stage and carry out two-way raising recovery efficiency technique effect and the developing adjustment scheme establishment level of driving. In the present invention spyIn high water-cut stage fault block oil reservoir, adopt two-way the driving of artificial gas cap-Bian water to improve recovery efficiency technique oil reservoir adaptability screening and assessment sideMethod, has proposed to carry out two-way reservoir selection condition and the screening technique that drives exploitation for fault block oil reservoir first, has realized fault blockIn oil reservoir, adopt the standardization of the two-way oil reservoirs screening and assessment of artificial gas cap-Bian water method of work, standardization, particularly forDevelop fault-block oilfield, there is the conveniently advantage of applying, for efficiently taping the latent power of fault block oil reservoir high water-cut stage adopted with raisingThe application of yield technology provides decision-making foundation, and its popularizing application prospect is wide, remarkable economic and social benefits.
Brief description of the drawings
Fig. 1 is that two-way one of the exploitation reservoir selection evaluation method of driving of fault block oil reservoir artificial gas cap-Bian water of the present invention is specifically implementedThe flow chart of example;
Fig. 2 is oil-containing substratum profit distribution plane in the present invention's one instantiation;
Fig. 3 is oil column height choice of parameters evaluation map in the present invention's one instantiation;
Fig. 4 is oil viscosity choice of parameters evaluation map in the present invention's one instantiation;
Fig. 5 is core intersection choice of parameters evaluation map in the present invention's one instantiation.
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 preferred embodiment,And coordinate appended graphicly, be described in detail below.
As shown in Figure 1, Fig. 1 is the two-way exploitation reservoir selection evaluation method of driving of fault block oil reservoir artificial gas cap-Bian water of the present inventionFlow chart.
In step 101, the exploitation later stage is than more rich geology, well logging, well logging, seismic data, the data such as dynamic,Carry out meticulous Strata Comparison and structure interpretation, implement these oil deposit parameter of reservoir geologic character, reservoir properties and fluid properties,Set up geological model of oil accumulation. If Fig. 2 is oil-containing substratum profit distribution plane in an instantiation of the present invention. Research showsExample element is the reverse ridge fault block oil reservoir that a typical case is subject to fault barrier, reservoir buried depth 2000m, and stratigraphic dip 8-10 °,Effective pay thickiness 2.9-5.4m, air permeability 870 × 10-3μm2, oil viscosity 2.8mPa.s, oil area0.1km2, oil in place 15.2 × 104T, oil-containing strip width 600-850m. Flow process enters into step 102.
In step 102, utilize reservoir numerical simulation software, set up numerical reservoir model, develop history matching, repairPositive geological model and oil deposit parameter, mainly comprise level and vertical permeability, each substratum oil-water interfaces, water energy,The parameters such as layer viscosity of crude, meanwhile, the current major oil reservoir are-al remaining oil of selective analysis distributes to study and shows example element orderFront recovery percent of reserves 11.8%, water flooding degree is lower, according to new well explanation and numerical simulation result show waist water flooding degree in recent yearsStill lower, high-order bit tomography angle, ridge one line development degree are low, remaining oil enrichment. Flow process enters into step 103.
In step 103, according to reservoir oil water distribution feature, current well pattern hole condition and theoretical recovery ratio Analyzing on SizeCarry out two-way driving and improve oil recovery space, demonstration is carried out two-way necessity of driving exploitation. When current well pattern is improved barUnder part, waterflood recovery efficiency factor is starkly lower than theoretical recovery ratio, and the tomography corner, structure high-order bit that exists current well pattern difficulty to employ is surplusIn the situation of excess oil Local enrichment, possess two-way potentiality of driving further raising recovery ratio. Analysis shows that example element is originalOil-containing band is greater than 600m, and all there is old well control system in high-order bit, waist and pool, limit, and hole condition is better, meets the two-way height that drivesPosition gas injection, outside limit or the well pattern deployment request that recovers the oil of periferal water flooding and waist, prediction theory waterflood recovery efficiency factor simultaneously34.7%, the two-way recovery ratio of driving can reach more than 40%, further improves recovery ratio space large. Flow process enters into step 104.
In step 104, choose oil columns, oil-containing strip width, underground viscosity of crude, core intersection, level and hang downTo oil deposit parameter such as permeability and limit water conditions, according to practicable oil deposit parameter, with reference to being applicable to carrying out two-way waterflooding development oilThe screening and assessment condition of hiding, and overall merit, judge that whether this candidate's fault block oil reservoir is applicable to the two-way exploitation of driving, and determines whetherBe applicable to the whole district or part series of strata and local well group and be applicable to carrying out the two-way exploitation of driving. Main screening and assessment condition comprises: 1.Boundary fault shutoff is good, and reservoir development is stable; 2. original oil-containing strip width > 300m, oil column height is greater than 50m;3. oil viscosity < 10mPa.s; 4. core intersection 3-10m; 5. level, vertical permeability are larger, and gas injection well point containsOil saturation is higher and the certain Edge water energy of tool is favourable. If Fig. 3 is that in the present invention's one instantiation, oil column height choice of parameters is commentedValency figure, Fig. 4 are that in the present invention's one instantiation, oil viscosity choice of parameters evaluation map, Fig. 5 are that the present invention one is concrete realCore intersection choice of parameters evaluation map in example. Overall merit, this development block reservoir condition meets the two-way crucial oil of screening that drivesHide parameter and with reference to oil reservoir parameter request, be applicable to the two-way further oil reservoir of exploitation that drives of application and improve recovery ratio. Further basisReservoir engineering method prediction, compared with water drive, can further improve recovery ratio more than 6.5%, has better economic benefit.
Claims (7)
1. the two-way exploitation reservoir selection evaluation method of driving of fault block oil reservoir artificial gas cap-Bian water, is characterized in that this fault block oil reservoir peopleThe two-way exploitation reservoir selection evaluation method of driving of work pneumatic jack-Bian water comprises:
Step 1, carries out the meticulous Strata Comparison of candidate's fault block oil reservoir and structure interpretation, implements oil deposit parameter, sets up geological model of oil accumulation;
Step 2, sets up numerical reservoir model, carries out on developing history matching basis, revises geological model of oil accumulation and oil deposit parameter;
Step 3, analyzes two-way driving and improves oil recovery potentiality, and demonstration is carried out two-way necessity of driving exploitation; And
Step 4, according to the oil deposit parameter of revising, judges whether this candidate's fault block oil reservoir is applicable to the two-way exploitation of driving.
2. two-way exploitation reservoir selection evaluation method, its feature of driving of fault block oil reservoir artificial gas cap-Bian water according to claim 1Be, in step 1, the exploitation later stage is than more rich geology, well logging, well logging, seismic data, dynamic these moneysMaterial, carries out meticulous Strata Comparison and structure interpretation, implements these oil reservoirs of reservoir geologic character, reservoir properties and fluid propertiesParameter, sets up geological model of oil accumulation.
3. two-way exploitation reservoir selection evaluation method, its feature of driving of fault block oil reservoir artificial gas cap-Bian water according to claim 1Be, in step 2, carry out reservoir numerical simulation, set up numerical reservoir model, develop history matching, revise groundMatter model and oil deposit parameter, comprise that level and vertical permeability, each substratum oil-water interfaces, water energy, in-place oil glueSpend these parameters, meanwhile, the current major oil reservoir are-al remaining oil of the selective analysis regularity of distribution, evaluates boundary fault shutoff.
4. two-way exploitation reservoir selection evaluation method, its feature of driving of fault block oil reservoir artificial gas cap-Bian water according to claim 1Be, in step 3, according to reservoir oil water distribution feature, current well pattern hole condition and theoretical recovery ratio Analyzing on SizeTwo-way driving improved oil recovery potentiality, and demonstration is carried out two-way necessity of driving exploitation.
5. two-way exploitation reservoir selection evaluation method, its feature of driving of fault block oil reservoir artificial gas cap-Bian water according to claim 4Be, in step 3, improve Water Under when current well pattern and drive recovery ratio and be starkly lower than theoretical recovery ratio, and have orderIn the situation of tomography corner, the structure high-order bit remaining oil Local enrichment that front well pattern difficulty is employed, possesses the two-way further raising of drivingThe potentiality of recovery ratio.
6. two-way exploitation reservoir selection evaluation method, its feature of driving of fault block oil reservoir artificial gas cap-Bian water according to claim 1Be, in step 4, choose oil columns, oil-containing strip width, underground viscosity of crude, core intersection, level and hang downTo permeability and these oil deposit parameter of limit water condition, according to practicable oil deposit parameter, with reference to being applicable to carrying out two-way waterflooding developmentThe screening and assessment condition of oil reservoir, and overall merit, judge that whether this candidate's fault block oil reservoir is applicable to the two-way exploitation of driving, and determines to beThe no applicable whole district or part series of strata and local well group are applicable to carrying out the two-way exploitation of driving.
7. the two-way exploitation reservoir selection evaluation method of driving of fault block oil reservoir artificial gas cap-Bian water according to claim 6, itsBe characterised in that, in step 4, screening and assessment condition comprises: 1. boundary fault shutoff is good, and reservoir development is stable; 2. formerBeginning oil-containing strip width > 300m, oil column height is greater than 50m; 3. oil viscosity < 10mPa.s; 4. core intersection3-10m; 5. level, vertical permeability are larger, and gas injection well point oil saturation is higher and the certain Edge water energy of tool is favourable.
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| CN110414085A (en) * | 2019-07-09 | 2019-11-05 | 中国石油化工股份有限公司 | It has developed fault block oil reservoir original oil-water level and has determined method |
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| CN112001132A (en) * | 2020-08-06 | 2020-11-27 | 中国石油化工股份有限公司 | Rigid water-drive reservoir residual oil distribution condition determining method and oil extraction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112001132A (en) * | 2020-08-06 | 2020-11-27 | 中国石油化工股份有限公司 | Rigid water-drive reservoir residual oil distribution condition determining method and oil extraction method |
| CN115422789A (en) * | 2022-11-07 | 2022-12-02 | 中国石油大学(华东) | Prediction method and system for optimizing water drive recovery ratio of fault block oil reservoir in consideration of whole process |
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