CN104484492B - Section extraction is evaluated using gas pumping data step type be connected rational method - Google Patents

Abstract

It is connected rational method the invention discloses section extraction is evaluated using gas pumping data step type, including：1) drill site gas pumping scale data, drill site characteristic parameter, drill site extraction duration, coal-bed gas geological information, drill site control range gas reserves Q are obtained₁, the average daily yield Y of working face₁Yield Y average daily with standby face₂；2) working face residue yield Y, standby face section coal reserves M are obtained¹With standby face gas reserves Q¹；3) Y is utilized₁、Y₂、Y、M¹Calculate standby face each section Production Cohesion time；4) using drill site control range gas pumping effect, M¹、Q¹Calculate each section extraction of standby face and bore dipstick metering and extraction time relationship；5) dipstick metering, extraction time relationship and each each section extraction connection and balance of section Production Cohesion Time evaluation standby face of standby face are bored using each section extraction of standby face.Step type extraction design can propose more rational extraction design according to different coalbed gas geologies, different engineering times, increased high methane, the security of low extraction time section, reduce the engineering waste of present low gas, extraction time section high.

Description

Section extraction is evaluated using gas pumping data step type be connected rational method

Technical field

The present invention relates to a kind of gas pumping linking Rationality Assessment method, more particularly to taken a step using gas pumping data Formula evaluates section extraction and is connected rational method.

Background technology

The current existing gas pumping design in colliery, extraction linking design, engineering construction major part are all according to mine itself Production needs to complete, and extraction evaluation only produces a tables of data of needs to meet in itself.It is this not examine Consider the actual coalbed gas geology information of construction location and production time, and there is great engineering in the blindness design and construction for carrying out Waste, there is also great potential safety hazard.Using step type extraction evaluation method can according to construction location coalbed gas geology information, The difference of production practices takes significantly more efficient detail design.For example, many working faces are inclined to length more than 2000 meters, eye position is cut Put gas bearing capacity 12m³/ t, working face first section gas bearing capacity 10m from opening³/ t, the construction engineering time is later than after cutting eye 200 days, at this moment, first section extraction borehole detail design can be substantially sparse in cutting eye, or cut eye and answer intensive in first Individual section, but be often what all place detail designs were just as in actual work progress, cause serious open region Section engineering is wasted or incisor canal has hidden danger.

The content of the invention

In consideration of it, the present invention is provided evaluates the section extraction rational method of linking using gas pumping data step type, The purpose of the present invention realizes that evaluating section extraction using gas pumping data step type is connected by such technical scheme Rational method, comprises the following steps：

1) drill site gas pumping scale data X is obtained_t, drill site characteristic parameter C₁, drill site extraction duration T₁, coal-bed gas ground Matter information, drill site control range gas reserves Q₁, the average daily yield Y of working face₁Yield Y average daily with standby face₂；

2) standby face is divided into n section from eye is cut to opening direction, is worked using coalbed gas geology acquisition of information The remaining yield Y in face, standby face section coal reserves M¹With standby face gas reserves Q¹；

3) Y is utilized₁、Y₂、Y、M¹Calculate standby face each section Production Cohesion time；

4) using drill site control range gas pumping effect, M¹、Q¹Each section extraction of standby face is calculated to bore dipstick metering and take out Adopt time relationship；

5) dipstick metering, extraction time relationship and each section production rank of standby face are bored using each section extraction of standby face Connect each section extraction connection and balance of Time evaluation standby face.

Further, the standby face gas reserves Q¹Specially：

The standby face section coal reserves M¹Specially：

Wherein W¹--- standby face section gas bearing capacity, m³/t；ρ --- coal body unit weight, t/m³；σ --- area is micro Unit, m²；H --- coal is thick, m；M¹--- standby face section coal reserves, t；D represents curve surface integral.

Further, standby face each section Production Cohesion time be specially：

In formula--- the section coal reserves of standby face i-th -1, i-1 >=0, t；T_i--- the area of standby face i-th Section Production Cohesion time, d.

Further, step 4) specifically, 1. utilizing drill site gas pumping scale data X_tCalculate drill site extraction cumulative amount and Its development trend, development trend is processed using the mode of numerical fitting；

Q_tDuring for accumulative extraction amount：

In formula

X_t--- drill site gas pumping scale, m³/min；Q_t--- drill site gas pumping total amount, m³；T --- the extraction time； 2. drill site control model is calculated using the maximum gas bearing capacity in drill site control range and drill site control range extraction critical value up to standard Enclose extraction cumulative amount Q up to standard_c；

W in formula_0max--- the maximum gas bearing capacity in drill site control range, m³/t；

W '-drill site extraction critical value up to standard, m³/t；

3. drill site is calculated with drill site control range extraction cumulative amount up to standard using drill site extraction cumulative amount and its development trend Control range extraction effect up to standard；

Q_tDuring for accumulative extraction amount：Q_t≥Q_c, extraction is up to standard, and otherwise, extraction is not up to standard,When t1 is extraction up to standard Between；

C₁=L₁·t₁ (6)

C in formula₁、L₁--- drill site characteristic parameter；

Or step 4) specifically, 1. utilizing drill site gas pumping scale data X_tCalculate drill site extraction cumulative amount and its development Trend, development trend is processed using the mode of numerical fitting；

Q_tDuring for estimated extraction amount：

Q_t=f (t) (7)

T is the extraction time；

2. calculated using the maximum gas bearing capacity in drill site control range and drill site control range extraction critical value up to standard and bored Field control range extraction cumulative amount Q up to standard_c；

In formula

W_0max--- the maximum gas bearing capacity in drill site control range, m³/t；W '-drill site extraction critical value up to standard, m³/t；

3. drill site is calculated with drill site control range extraction cumulative amount up to standard using drill site extraction cumulative amount and its development trend Control range extraction effect up to standard；

Q_tDuring for estimated extraction amount：Q_t≥Q_c, extraction is up to standard, and otherwise, extraction is not up to standard,t₂For estimated extraction reaches Between timestamp；

C₂=L₁·t₂ (9)

L in formula₁、C₂--- drill site characteristic parameter.

Further, each section extraction connection and balance of the standby face are obtained using following methods：

In formula--- the maximum gas bearing capacity of the section of standby face i-th, m³/t；W " --- standby face i-th Section extraction critical value up to standard, m³/t；Q′_c--- standby face the i-th section extraction cumulative amount up to standard, m³；

L in formula_i--- standby face the i-th section drill site characteristic parameter；t_i--- when the section of standby face i-th is taken out in advance Between, d；

Work as t_i≤T_iThen extraction connection and balance；Otherwise extraction linking is uneven, and extraction linking increases L when uneven_i, reduce t_i。

By adopting the above-described technical solution, the present invention has the advantage that：

(1) step type extraction design can propose more rational extraction according to different coalbed gas geologies, different engineering times Design, increased high methane, the security of low extraction time section, reduce the engineering wave of present low gas, extraction time section high Take.

(2) engineering construction amount has more really and accurately been reacted in step type extraction design, is the arrangement of mine more science Production has carried direction.

Brief description of the drawings

In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into The detailed description of one step, wherein：

Fig. 1 is to evaluate section extracting result method route figure using drill site extraction monitoring data.

Specific embodiment

Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail；It should be appreciated that preferred embodiment Only for the explanation present invention, rather than in order to limit the scope of the invention.

Section extraction is evaluated using gas pumping data step type and be connected rational method, comprise the following steps：

1) drill site gas pumping scale data X is obtained_t, drill site characteristic parameter C₁, drill site extraction duration T₁, coal-bed gas ground Matter information, drill site control range gas reserves Q₁, the average daily yield Y of working face₁Yield Y average daily with standby face₂；Drill site extraction Duration T₁Refer to any one time with reference to drill site control range extraction needed for up to standard, it refers to that drill site control range is appointed that extraction is up to standard Meaning point gas bearing capacity is no more than 8m³/ t, page can be investigated according to authoritative institution and determine a value as value up to standard.

2) standby face is divided into n section from eye is cut to opening direction, is worked using coalbed gas geology acquisition of information The remaining yield Y in face, standby face section coal reserves M¹With standby face gas reserves Q¹；

The standby face gas reserves Q¹Specially：

The standby face section coal reserves M¹Specially：

Wherein W¹--- standby face section gas bearing capacity, m³/t；ρ --- coal body unit weight, t/m³；σ --- area is micro Unit, m²；H --- coal is thick, m；M¹--- standby face section coal reserves, t；D represents curve surface integral.

3) Y is utilized₁、Y₂、Y、M¹Calculate standby face each section Production Cohesion time；

Standby face each section Production Cohesion time is specially：

In formula--- the section coal reserves of standby face i-th -1, i-1 >=0, t；T_i--- standby face i-th Section Production Cohesion time, d.

4) using drill site control range gas pumping effect, M¹、Q¹Each section extraction of standby face is calculated to bore dipstick metering and take out Adopt time relationship；Specifically,

1. drill site extraction scale data X is utilized_tDrill site extraction cumulative amount and its development trend are calculated, development trend utilizes number The mode of value fitting is processed；

Q_tDuring for accumulative extraction amount：

Q_tDuring for estimated extraction amount：

Q_t=f (t) (2)

X in formula_t--- drill site gas pumping scale, m³/min；

Q_t--- drill site gas pumping total amount, m³。

T is the extraction time, and the extraction time is the time calculated according to the different condition of drill site

2. it is up to standard critical with drill site control range extraction using coalbed gas geology acquisition of information drill site control range gas reserves Value calculates drill site control range extraction cumulative amount up to standard；

W in formula_0max--- the maximum gas bearing capacity in drill site control range, m³/t；

W ' --- drill site extraction critical value up to standard, m³/t；

Q_c--- drilling control range extraction cumulative amount up to standard, m³。

3. drill site is calculated with drill site control range extraction cumulative amount up to standard using drill site extraction cumulative amount and its development trend Control range extraction effect up to standard；

Q_tDuring for accumulative extraction amount：Q_t≥Q_c, extraction is up to standard, and otherwise, extraction is not up to standard,t₁For extraction it is up to standard when Between.

C₁=L₁·t₁ (5)

Q_tDuring for estimated extraction amount：Q_t≥Q_c, extraction is up to standard, and otherwise, extraction is not up to standard,t₂For estimated extraction reaches Between timestamp.

C₂=L₁·t₂ (6)

C in formula₁、L₁、C₂--- drill site characteristic parameter.

5) dipstick metering, extraction time relationship and each section production rank of standby face are bored using each section extraction of standby face Each section extraction connection and balance of Time evaluation standby face are connect, specially：

In formula--- the maximum gas bearing capacity of the section of standby face i-th, m³/t；The area of W " --- standby face i-th Section extraction critical value up to standard, m³/t；Q′_c--- standby face the i-th section extraction cumulative amount up to standard, m³；

L in formula_i--- standby face the i-th section drill site characteristic parameter；t_i--- when the section of standby face i-th is taken out in advance Between, d；

Work as t_i≤T_iThen extraction connection and balance；Otherwise extraction linking is uneven, and extraction linking increases L when uneven_i, reduce t_i。

Step type extraction design of the present invention can be proposed more rational according to different coalbed gas geologies, different engineering times Extraction is designed, and increased high methane, the security of low extraction time section, reduces present low gas, the work of extraction time section high Journey is wasted.

The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, it is clear that those skilled in the art Member can carry out various changes and modification without departing from the spirit and scope of the present invention to the present invention.So, if of the invention These modifications and modification belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to comprising these Including change and modification.

Claims (5)

1. evaluate section extraction using gas pumping data step type and be connected rational method, it is characterised in that：Including as follows Step：

1) drill site gas pumping scale data X is obtained_t, drill site characteristic parameter C₁, drill site extraction duration T₁, coal-bed gas geology letter Breath, drill site control range gas reserves Q₁, the average daily yield Y of working face₁Yield Y average daily with standby face₂；

2) standby face is divided into n section from eye is cut to opening direction, it is surplus using coalbed gas geology acquisition of information working face Remaining yield Y, standby face section coal reserves M¹With standby face gas reserves Q¹；

3) Y is utilized₁、Y₂、Y、M¹Calculate standby face each section Production Cohesion time；

4) using drill site control range gas pumping time, M¹、Q¹When calculating each section extraction brill dipstick metering of standby face with extraction Between relation；

5) when boring dipstick metering, extraction time relationship and each section Production Cohesion of standby face using each section extraction of standby face Between evaluate each section extraction connection and balance of standby face；

The standby face gas reserves Q¹Specially：

The standby face section coal reserves M¹Specially：

Wherein W¹--- standby face section gas bearing capacity, m³/t；ρ --- coal body unit weight, t/m³；σ --- the micro list of area Unit, m²；H --- coal is thick, m；M¹--- standby face section coal reserves, t；D represents curve surface integral.

2. utilization gas pumping data step type according to claim 1 evaluates the section extraction rational method of linking, It is characterized in that：

Standby face each section Production Cohesion time is specially：

$T_i=\frac{Y}{Y_1}+\underset{i=1}{\overset{n}{\Σ}}\frac{M_{i-1}^1}{Y_2}---\left(3\right)$

In formula--- the section coal reserves of standby face i-th -1, i-1 >=0, t；T_i--- the section of standby face i-th is given birth to Produce convergence time, d.

3. utilization gas pumping data step type according to claim 1 evaluates the section extraction rational method of linking, It is characterized in that：Step 4) it is specially

1. drill site gas pumping scale data X is utilized_tDrill site extraction cumulative amount and its development trend are calculated, development trend utilizes number The mode of value fitting is processed；

Q_tDuring for accumulative extraction amount：

$Q_t=\underset{t=0}{\overset{t=i}{\mathrm{\Σ}}}{X}_t---\left(4\right)$

In formula

X_t--- drill site gas pumping scale, m³/min；T --- the extraction time；

2. drill site control is calculated using the maximum gas bearing capacity in drill site control range and drill site control range extraction critical value up to standard Scope extraction cumulative amount Q up to standard processed_c；

$Q_c=(W_{0max}-W^{\′})\·\mathrm{\ρ}\·\underset{D}{\∫\∫}h\·d\mathrm{\σ}---\left(5\right)$

W in formula_0max--- the maximum gas bearing capacity in drill site control range, m³/t；

W '-drill site extraction critical value up to standard, m³/t；

3. drill site control is calculated with drill site control range extraction cumulative amount up to standard using drill site extraction cumulative amount and its development trend Scope extraction effect up to standard；

Q_tDuring for accumulative extraction amount：Q_t≥Q_c, extraction is up to standard, and otherwise extraction is not up to standard,t₁It is extraction reaching standard time；

C₁=L₁·t₁ (6)

C in formula₁、L₁--- drill site characteristic parameter.

4. utilization gas pumping data step type according to claim 1 evaluates the section extraction rational method of linking, It is characterized in that：Step 4) specifically,

1. drill site gas pumping scale data X is utilized_tDrill site extraction cumulative amount and its development trend are calculated, development trend utilizes number The mode of value fitting is processed；

Q_tDuring for estimated extraction amount：

Q_t=f (t) (7)

T is the extraction time；

2. drill site control is calculated using the maximum gas bearing capacity in drill site control range and drill site control range extraction critical value up to standard Scope extraction cumulative amount Q up to standard processed_c；

$Q_c=(W_{0max}-W^{\′})\·\mathrm{\ρ}\·\underset{D}{\∫\∫}h\·d\mathrm{\σ}---\left(8\right)$

In formula

W_0max--- the maximum gas bearing capacity in drill site control range, m³/t；W '-drill site extraction critical value up to standard, m³/t；

3. drill site control is calculated with drill site control range extraction cumulative amount up to standard using drill site extraction cumulative amount and its development trend Scope extraction effect up to standard；

Q_tDuring for estimated extraction amount：Q_t≥Q_c, extraction is up to standard, and otherwise extraction is not up to standard,t₂During to be expected that extraction is up to standard Between；

C₂=L₁·t₂ (9)

L in formula₁、C₂--- drill site characteristic parameter.

5. utilization gas pumping data step type according to claim 4 evaluates the section extraction rational method of linking, It is characterized in that：

Each section extraction connection and balance of the standby face are obtained using following methods：

$Q_c^{\′}=(W_{0\max }^1-W^{\′\′})\·\mathrm{\ρ}\·\underset{D}{\∫\∫}h\·d\mathrm{\σ}---\left(10\right)$

In formula--- the maximum gas bearing capacity of the section of standby face i-th, m³/t；The section of W " --- standby face i-th Extraction critical value up to standard, m³/t；Q′_c--- standby face the i-th section extraction cumulative amount up to standard, m³；

$\frac{Q_c}{Q_c^{\′}}=\frac{L_1\·t_2}{L_i\·t_i}---\left(11\right)$

L in formula_i--- standby face the i-th section drill site characteristic parameter；t_i--- the section of standby face i-th is found time in advance, d；

Work as t_i≤T_iThen extraction connection and balance；Otherwise extraction linking is uneven, and extraction linking increases L when uneven_i, reduce t_i。