CN102278090A - Method and control system for stopping leakage of reservoir fracture in drilling - Google Patents
Method and control system for stopping leakage of reservoir fracture in drilling Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 78
- 239000012530 fluid Substances 0.000 claims abstract description 48
- 239000002245 particle Substances 0.000 claims abstract description 48
- 239000011148 porous material Substances 0.000 claims abstract description 20
- 230000002452 interceptive effect Effects 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 10
- 238000009825 accumulation Methods 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 8
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 6
- 238000003786 synthesis reaction Methods 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 6
- 238000003860 storage Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract 2
- 239000003566 sealing material Substances 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 101100310953 Arabidopsis thaliana SRD2 gene Proteins 0.000 description 1
- 101100096598 Caenorhabditis elegans srd-3 gene Proteins 0.000 description 1
- 240000007049 Juglans regia Species 0.000 description 1
- 235000009496 Juglans regia Nutrition 0.000 description 1
- 101100388638 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ECM23 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 235000020234 walnut Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a method and a control system for stopping the leakage of a reservoir fracture in drilling. The method comprises the following steps of: (1) collecting geological, drilling, drilling fluid and leakage parameters to compute the width of the reservoir fracture; (2) selecting a leakage stopping material with a corresponding particle size according t the width of the reservoir fracture; and (3) computing a pore size formed by the leakage stopping material selected by the step (2), selecting a next-stage leakage stopping material with a particle size corresponding to the pore size, sealing the pore size formed by an upper-stage leakage stopping material by using the next-stage leakage stopping material, computing the pore sizes formed by the leakage stopping materials of each stage by the operations stage by stage, and selecting sealing materials with the corresponding particle sizes to form a multistage leakage stopping drilling fluid composition of sealing pores formed by the leakage stopping materials with larger particle sizes by using the leakage stopping materials with smaller particle sizes to seal the reservoir fracture. The control system comprises a reservoir fracture width computing module adopting an interactive user interface, a leakage stopping drilling fluid composition generation module, a data recording and storage module and a composition design display module. The method and the system have the characteristics of convenience, practicability, timeliness and the like.
Description
Technical field
The present invention relates to a kind of blocking method of meeting the reservoir crack that bores, reach the leak stopping control system, it is used for aided drilling liquid engineer and calculates reservoir crack width and design plugging drilling fluid prescription, can be in the situ of drilling well real-time operation, and promptness is strong.
Background technology
The intrinsic fracture of reservoir is the important seepage channel of oil-gas mining, when running into the crack in the drilling well, leakage phenomena usually takes place, and this just needs drilling fluid to carry out leak stopping.At present, the blocking method that adopts in the oil-gas mining is, according to leaking fast big or small rough estimate crack width and designing the plugging drilling fluid prescription according to experience.There are following 3 main deficiencies in this method: 1. crack width is estimated, the engineer does not also know definite parameter, thereby causes difficulty for follow-up leak stopping design for scheme, and this is because the accurate prediction of crack width is the basis of follow-up leak stopping solution formulation; 2. rule of thumb definite plugging drilling fluid prescription can't be known the size distribution of material in the definite plugging drilling fluid, and this is because rational size distribution is the key of leak stopping success, thereby often repeatedly leak stopping could be successful to cause the scene; From crack width estimate the plugging drilling fluid Formula Design, rely on engineer individual's subjective experience fully, poor practicability.Above-mentioned 3 main deficiencies cause plugging operations once to determine, often need carry out repeatedly in the mode of test repeatedly could be successful, seriously restricted the smooth exploitation of oil gas well.And the leak stopping repeatedly of this test formula needs a large amount of plugging drilling fluids, has increased the cost of oil-gas mining, even more serious is to cause a large amount of plugging drilling fluids and leak stopping slurry to invade the reservoir deep, be difficult to the row of returning, loss oil and gas flow passage causes the injury that can't retrieve to reservoir.
In sum, accurately calculate the matter of great urgency that reservoir crack width and design plugging drilling fluid prescription have become current oil-gas mining.
Summary of the invention
One of purpose of the present invention is: at above-mentioned the deficiencies in the prior art, provide a kind of simple, convenient and practical, blocking method that brill that promptness is strong is met the reservoir crack.
Two of purpose of the present invention is: at above-mentioned the deficiencies in the prior art, provide a kind of automation, even intelligentized brill is met the leak stopping control system in reservoir crack.
One of purpose of the present invention adopts following technical proposals to realize: a kind of blocking method of meeting the reservoir crack that bores comprises the following steps:
(1) collects geologic parameter, drilling parameter, drilling liquid parameter and leakage parameter, obtain the width in reservoir crack by these calculation of parameter;
(2) select the loss circulation material of corresponding particle diameter according to the reservoir crack width;
(3), select the next stage loss circulation material with the corresponding particle diameter of this pore-size, with the pore-size of next stage loss circulation material shutoff upper level loss circulation material formation by calculating the pore-size that step (2) loss circulation material forms; According to preceding method, calculate the pore-size that each grade loss circulation material forms step by step, and select the plugging material of corresponding particle diameter, form multistage plugging drilling fluid prescription with this, with the shutoff of reservoir crack with the big particle diameter loss circulation material of small particle diameter loss circulation material shutoff hole.
The width in reservoir crack draws by following computation model in the step (1):
In the formula:
Be crack width;
Be formation porosity; r
EqBe the well equivalent redius; △
Be the drilling well positive differential pressure;
Plastic viscosity for drilling fluid;
Be the total compression coefficient; v
CumBe the accumulation wastage; T is the leakage time; C is a constant, gets 1.3956.
The average pore size that loss circulation material forms in the step (3) draws by the computation model of one of the following:
1. Coberly formula,
②
；
In the formula: D
PoreBe effective pore throat size, unit is μ m; D
50Be average packed particle size, unit is μ m; Φ is for piling up degree of porosity.
Two of purpose of the present invention adopts following technical proposals to realize: a kind of leak stopping control system of meeting the reservoir crack of boring comprises reservoir crack width computing module, plugging drilling fluid prescription generation module, the data record memory module of interactive user interface and shows the prescription design module; Wherein:
Reservoir crack width computing module:, calculate the width in reservoir crack based on the computation model analysis-by-synthesis of system according to the geologic parameter of collecting, drilling parameter, drilling liquid parameter and leakage parameter information;
Plugging drilling fluid prescription generation module: the width value to the output of reservoir crack width computing module is analyzed, and selects the plugging drilling fluid prescription of corresponding particle diameter in the data record memory module according to analysis result;
Data record memory module: title and the average packed particle size of being responsible for the various loss circulation materials of record, and calculate the particle packing degree of porosity and the average pore size of various loss circulation materials based on the computation model analysis-by-synthesis of system, accumulation degree of porosity and average pore size according to various loss circulation materials, various loss circulation materials are divided into a plurality of different ranks, the pore-size that makes the formation of each grade loss circulation material forms multistage plugging drilling fluid prescription with the big particle diameter loss circulation material of small particle diameter loss circulation material shutoff pore-size by the shutoff of next stage loss circulation material with this; And these information record is stored in database;
Show the prescription design module: the prescription that the responsible loss circulation materials at different levels that show that plugging drilling fluid prescription generation module generates are formed.
Computation model in the described reservoir crack width computing module is as follows:
In the formula:
Be crack width;
Be formation porosity; r
EqBe the well equivalent redius; △
Be the drilling well positive differential pressure;
Plastic viscosity for drilling fluid;
Be the total compression coefficient; v
CumBe the accumulation wastage; T is the leakage time; C is a constant, gets 1.3956.
Computation model in the described data record memory module is an one of the following:
1. Coberly formula,
②
；
In the formula: D
PoreBe effective pore throat size, unit is μ m; D
50Be average packed particle size, unit is μ m; Φ is for piling up degree of porosity.
The invention has the beneficial effects as follows:
Method of the present invention, be that this leakage parameter that " is harmful to " phenomenon and provides is converted into " useful " data of calculating the down-hole crack width with leakage, in conjunction with geologic parameter, science data such as drilling parameter and drilling liquid parameter, disposablely just can accurately calculate the reservoir crack width, integrated application particle packing theory, particle bridge formation theory and loss circulation material particle size distribution data are developed the plugging drilling fluid prescription of mutual compatibility, effective shutoff is carried out in the reservoir crack, it is reasonable to the demand of plugging drilling fluid prescription, there is not waste, injury to the reservoir crack is little, has simple, characteristics such as convenient and practical and promptness is strong;
Control system of the present invention, be to adopt computer programming language that blocking method of the present invention is written as special-purpose software, finish the integrated work that calculates the design of plugging drilling fluid prescription from the leakage crack width, thereby realize the computerization of plugging drilling fluid prescription design, automation, even it is intelligent, adjust the plugging drilling fluid prescription that corresponding proportioning comes grade reasonable in design to distribute by different crack widths intuitively, aided drilling liquid engineer formulates rational leak stopping scheme, effectively instruct field operation, significantly improve operating efficiency, leak stopping in time reduces leakage, thereby reduces loss.
Description of drawings
Fig. 1 is a kind of FB(flow block) of the present invention.
Fig. 2 is a kind of structured flowchart of control system of the present invention.
Fig. 3 is that the present invention shows that the prescription design module demonstrates the template figure of plugging drilling fluid commonly used.
The specific embodiment
Referring to Fig. 1: a kind of blocking method of meeting the reservoir crack that bores comprises the following order step:
(1). collect geologic parameter 3, drilling parameter 4, drilling liquid parameter 5 and leakage parameter 6, wherein, geologic parameter 3 comprises degree of porosity and fracture dip, drilling parameter 4 comprises bore hole hole diameter, drill footage and pressure reduction, drilling liquid parameter 5 comprises plastic viscosity and compression coefficient, leakage parameter 6 comprises wastage and leakage time, these parameters is applied in the following computation model, by calculating leakage (reservoir) crack width 1; Computation model is specific as follows,
In the formula:
Be crack width;
r
EqBe the well equivalent redius;
△
Be the drilling well positive differential pressure;
v
CumBe the accumulation wastage;
T is the leakage time;
C is a constant, gets 1.3956.
(2). according to the leakage crack width 1 that step (1) draws, selection is a loss circulation material with the plugging drilling fluid 2(of the corresponding particle diameter of this width).
(3). calculate the pore-size 8 that the selected loss circulation material of step (2) forms by the particle packing theory, select the next stage loss circulation material of the known size distribution 9 corresponding then, with the pore-size of next stage loss circulation material shutoff upper level loss circulation material formation with this pore-size; And according to preceding method, calculate the pore-size that each grade loss circulation material forms step by step, select next stage plugging material with the corresponding particle diameter of this grade pore-size, form multistage plugging drilling fluid prescription with this with the big particle diameter loss circulation material of small particle diameter loss circulation material shutoff hole, as plugging operations 7, with leakage (reservoir) crack shutoff, reduce leakage; The average pore size that loss circulation material in this step forms draws by following computation model:
1. Coberly formula,
Or
②
；
In the formula: D
PoreBe effective pore throat size, unit is μ m;
D
50Be average packed particle size, unit is μ m;
Φ is for piling up degree of porosity.
Referring to Fig. 2: a kind of leak stopping control system of meeting the reservoir crack of boring comprises reservoir crack width computing module 10, plugging drilling fluid prescription generation module 11, the data record memory module 12 of interactive user interface and shows prescription design module 13.Wherein:
Reservoir crack width computing module 10:, calculate the width in reservoir crack based on the computation model analysis-by-synthesis of system according to the geologic parameter of collecting, drilling parameter, drilling liquid parameter and leakage parameter information; Aforesaid geologic parameter comprises degree of porosity and fracture dip, and drilling parameter comprises bore hole hole diameter, drill footage and pressure reduction, and drilling liquid parameter comprises plastic viscosity and compression coefficient, and the leakage parameter comprises wastage and leakage time.
The aforementioned calculation model is specific as follows:
In the formula:
Be crack width;
Be formation porosity;
r
EqBe the well equivalent redius;
△
Be the drilling well positive differential pressure;
Be the total compression coefficient;
v
CumBe the accumulation wastage;
T is the leakage time;
C is a constant, gets 1.3956.
Plugging drilling fluid prescription generation module 11: the width value to 10 outputs of reservoir crack width computing module is analyzed, and selects plugging drilling fluid prescription with the corresponding particle diameter of width value according to analysis result in data record memory module 12.
Data record memory module 12: title and the average packed particle size of being responsible for the various loss circulation materials of record, and calculate the particle packing degree of porosity and the average pore size of various loss circulation materials based on the computation model analysis-by-synthesis of system, accumulation degree of porosity and average pore size according to various loss circulation materials, various loss circulation materials are divided into a plurality of different ranks, the pore-size that makes the formation of each grade loss circulation material forms multistage plugging drilling fluid prescription with the big particle diameter loss circulation material of small particle diameter loss circulation material shutoff pore-size by the shutoff of next stage loss circulation material with this; And these information record is stored in database.
Computation model in the above-mentioned data record memory module 12 is specific as follows:
1. Coberly formula,
Or
②
；
In the formula: D
PoreBe effective pore throat size, unit is μ m;
D
50Be average packed particle size, unit is μ m;
Φ is for piling up degree of porosity.
Show the prescription design module: the prescription that the responsible loss circulation materials at different levels that show that plugging drilling fluid prescription generation module 11 generates are formed, this design module will be filled a prescription with the form demonstration of template figure, make things convenient for the loss circulation material of engineer's match query directly perceived.
Referring to Fig. 3: with control system of the present invention some loss circulation materials commonly used have been carried out gathering and calculated, and with in these data record storages and the database, for future use.Below just the invention will be further described in conjunction with gathering these loss circulation material data commonly used that calculate.
Adopt computation model Blake-Kozeny formula, i.e. D
Pore=D
50Φ/(3(1-Φ)), be that walnut shell, SRD5, SRD3, SRD2 and FRD-2 calculate to loss circulation material title/code name; Adopt computation model Coberly formula, i.e. D
Pore=D
50/ 6.5, be RSD80, FRD-1, DTR, SD1, LF-2, FLC-1, LF-1 and CaCO to loss circulation material title/code name
3Calculate, computed information specifically is shown in Table 1.
The loss circulation material commonly used that table 1 calculates is piled up pore-size
Annotate: upward each loss circulation material is granular material in the table.
Loss circulation material according to table 1 is piled up pore-size, by the principle that the next stage loss circulation material must mate upper level loss circulation material hole, obtains drilling fluid composition design template figure shown in Figure 3.After calculating the reservoir crack width, the first order loss circulation material of elder generation's match query crack width on drilling fluid composition design template figure, find out the particle diameter particle corresponding with crack width, but find out the next stage particle that this grade particles of corresponding shutoff forms pore-size by this grade arrow indication then, by that analogy, and according to the best plugging drilling fluid prescription that must dosage plugging drilling fluid (seeing Table 2) obtain that is stored in the database.
Table 2 must the dosage plugging drilling fluid
Claims (6)
1. one kind is bored the blocking method of meeting the reservoir crack, comprises the following steps:
(1). collect geologic parameter, drilling parameter, drilling liquid parameter and leakage parameter, obtain the width in reservoir crack by these calculation of parameter;
(2). select the loss circulation material of corresponding particle diameter according to the reservoir crack width;
(3). by calculating the pore-size that step (2) loss circulation material forms, select the next stage loss circulation material with the corresponding particle diameter of this pore-size, with the pore-size of next stage loss circulation material shutoff upper level loss circulation material formation; According to preceding method, calculate the pore-size that each grade loss circulation material forms step by step, and select the plugging material of corresponding particle diameter, form multistage plugging drilling fluid prescription with this, with the shutoff of reservoir crack with the big particle diameter loss circulation material of small particle diameter loss circulation material shutoff hole.
2. meet the blocking method in reservoir crack according to the described brill of claim 1, it is characterized in that the width in reservoir crack draws by following computation model in the step (1):
In the formula:
Be crack width;
Be formation porosity; r
EqBe the well equivalent redius; △
Be the drilling well positive differential pressure;
Plastic viscosity for drilling fluid;
Be the total compression coefficient; v
CumBe the accumulation wastage; T is the leakage time; C is a constant, gets 1.3956.
3. meet the blocking method in reservoir crack according to the described brill of claim 1, it is characterized in that the average pore size that loss circulation material forms in the step (3) draws by the computation model of one of the following:
1. Coberly formula,
②
；
In the formula: D
PoreBe effective pore throat size, unit is μ m; D
50Be average packed particle size, unit is μ m; Φ is for piling up degree of porosity.
4. one kind is bored the leak stopping control system of meeting the reservoir crack, it is characterized in that, comprises reservoir crack width computing module, plugging drilling fluid prescription generation module, the data record memory module of interactive user interface and shows the prescription design module; Wherein:
Reservoir crack width computing module:, calculate the width in reservoir crack based on the computation model analysis-by-synthesis of system according to the geologic parameter of collecting, drilling parameter, drilling liquid parameter and leakage parameter information;
Plugging drilling fluid prescription generation module: the width value to the output of reservoir crack width computing module is analyzed, and selects the plugging drilling fluid prescription of corresponding particle diameter in the data record memory module according to analysis result;
Data record memory module: title and the average packed particle size of being responsible for the various loss circulation materials of record, and calculate the particle packing degree of porosity and the average pore size of various loss circulation materials based on the computation model analysis-by-synthesis of system, accumulation degree of porosity and average pore size according to various loss circulation materials, various loss circulation materials are divided into a plurality of different ranks, the pore-size that makes the formation of each grade loss circulation material forms multistage plugging drilling fluid prescription with the big particle diameter loss circulation material of small particle diameter loss circulation material shutoff pore-size by the shutoff of next stage loss circulation material with this; And these information record is stored in database;
Show the prescription design module: the prescription that the responsible loss circulation materials at different levels that show that plugging drilling fluid prescription generation module generates are formed.
5. meet the leak stopping control system in reservoir crack according to the described brill of claim 4, it is characterized in that the computation model in the described reservoir crack width computing module is as follows:
In the formula:
Be crack width;
Be formation porosity; r
EqBe the well equivalent redius; △
Be the drilling well positive differential pressure;
Plastic viscosity for drilling fluid;
Be the total compression coefficient; v
CumBe the accumulation wastage; T is the leakage time; C is a constant, gets 1.3956.
6. meet the leak stopping control system in reservoir crack according to the described brill of claim 4, it is characterized in that the computation model in the described data record memory module is an one of the following:
1. Coberly formula,
②
；
In the formula: D
PoreBe effective pore throat size, unit is μ m; D
50Be average packed particle size, unit is μ m; Φ is for piling up degree of porosity.
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| CN103015945A (en) * | 2012-12-07 | 2013-04-03 | 中国石油集团川庆钻探工程有限公司 | Process for improving pressure bearing capacity of stratum |
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| CN104949899A (en) * | 2015-05-19 | 2015-09-30 | 重庆科技学院 | Method for measuring effective viscosity of oil displacing polymer in porous medium |
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| CN103015945A (en) * | 2012-12-07 | 2013-04-03 | 中国石油集团川庆钻探工程有限公司 | Process for improving pressure bearing capacity of stratum |
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| CN104949899A (en) * | 2015-05-19 | 2015-09-30 | 重庆科技学院 | Method for measuring effective viscosity of oil displacing polymer in porous medium |
| CN104949899B (en) * | 2015-05-19 | 2017-09-08 | 重庆科技学院 | A kind of assay method of Polymer Used For Oil Displacement effective viscosity in porous media |
| CN108868687A (en) * | 2017-05-15 | 2018-11-23 | 中国石油化工股份有限公司 | A kind of method of leak-proof leak-stopping |
| CN108868687B (en) * | 2017-05-15 | 2020-08-11 | 中国石油化工股份有限公司 | Leakage-proof and plugging method |
| CN110017118A (en) * | 2018-01-08 | 2019-07-16 | 中国石油化工股份有限公司 | A kind of leak-proof leak-stopping system |
| CN110763826A (en) * | 2018-07-25 | 2020-02-07 | 中国石油天然气股份有限公司 | Drilling fluid detection equipment |
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| CN110764541B (en) * | 2018-07-26 | 2023-04-07 | 中国石油天然气股份有限公司 | Method and device for determining particle composition of drilling fluid |
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