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SY/T5505-92, Petroleum and Natural Gas Industry Standard of the People's Republic of China
Overall Design Practice of Cluster Wells
Published on November 3, 1992
Ministry of Energy of the People's Republic of China
Implemented on April 1, 1993
Overall Design Practice of Cluster Wells of the Petroleum and Natural Gas Industry Standard of the People's Republic of China
SY/T6505-92
1 Subject Content and Applicable Scope
This standard specifies the overall planning method for the setting of cluster wells, the design method of cluster wells on a single platform, and the design principles and methods for the profiles of each single well in a cluster well group.
This standard applies to the development of cluster wells in onshore oil fields. It can be used as a reference for offshore oil fields. 2 No. 1 Standard
SY/T5435 Two-dimensional conventional directional track design and trajectory drawing method 3 Platform setting overall planning
Mathematical model
ti·fi(Siu)+
(i=1,2,.,m-)
(j=1,2,,np)
The total value of the section capital that matches the cluster development, 10,000 yuan Where: 2-
n——Number of platforms arranged in the block development, pieces; ———Total number of wells in cluster well development block, 口: i---0-1Variable
(1The first well is drilled on platform No. j: 1. The first well is not drilled on platform No. j, S——Horizontal displacement of platform No. j, mh(i=1,2,n)——Vertical depth of well No. j at the same time, mC
f(Si,h:)——Number of drilling and drilling expenses, C(,2,…,)——Investment expenses other than drilling and drilling expenses, 10,000 yuan——Total number of other expenses related to cluster well development except drilling expenses (j-1,2,,m——Number of wells drilled on platform No. j, 口——Maximum number of wells that can be drilled on platform No. j, 口. St,={(xj-x)8+(yi- yi)\91/2
Where: (xiy)i=,2,\,n)—the well position coordinates of the day, m (xy)=1,2,np)—the geographical coordinates of the jth platform, m. Approved by the Ministry of Energy of the People's Republic of China on November 3, 1992 (1)
Implementation on April 1, 1993
3.2 Mathematical model solution
SY/T 5505—92
3.2.1 Calculate fS) by statistical method based on the data of the drilled directional wells. 3.2.2 In the model, the number of platforms is a superscript variable, and the minimum and maximum values can be given according to the specific situation. 3.2.3 When the number of platforms is given a possible value, formula (1) can be decomposed into two parts for solution, that is, first determine the platform location and position division based on the lowest total drilling cost, and then solve the remaining parts based on the lowest total cost. 3.2.4 After the grid is given, solving the problem of the lowest total cost of drilling is related to the "site selection-allocation" problem. According to the characteristics of a platform controlling the well location in a certain area, the problem can be decomposed into two sub-problems of "site selection" and "allocation" and solved iteratively. 3.2.5 After solving the problem of the lowest total cost of drilling, the optimization and calculation problem of the remaining part of formula (1) is solved according to the specific situation, that is, the calculation of ≥C;.
3.2.5.1 Calculation of platform construction cost
The platform construction cost mainly depends on the construction cost per unit area of the platform and the total area of the platform. The unit area construction cost is mainly related to the price of the expropriated land and the overhead costs. When the geographical conditions of the development block do not change much, it can be considered that this cost is equal to the known constant 1 in the area. The total area of the platform can be considered to be linearly related to the number of holes drilled on the platform. The calculation formula is: "
Zuian+b(ni-
Where: C1—platform construction cost, 10,000 yuan u1——platform unit area construction cost, 10,000 yuan/n\; coefficient, m.
In some areas with complex geographical environments (such as Changqing Ansai, where oil is old and mountains are deep), as the number of wells increases, the platform construction cost increases exponentially with the number of wells, then C, can be expressed by the following formula: Cr- uru(m-a+ba(ni-1))
Equation: 一一The number of belts related to the terrain, no amount of steel. 6
If due to changes in geographical conditions, the construction cost per unit area of a platform in a block is related to the location of the platform, a certain model should be selected to solve it according to the specific situation
3.2.5.2 Calculation of highway and transmission line costs Highway laying is generally divided into three levels: main road, branch road and field road. The principle is that each platform must have a highway passing through. In addition to the existing highways, villages, rivers and other conditions, the design must also comply with the national standards for highway laying. Transmission lines are generally laid along highways. As long as the highway laying plan is determined, the transmission line is also determined. The calculation formula is: C,= j21L: +22L2+μ2s+μ24(L,+La+La)..Where: C2—highway and transmission line costs, RMB 10,000; 421—main road unit length compensation cost, RMB 10,000/kmu 22—branch road unit length construction cost, RMB 10,000/kmt 429—off-site road unit length construction cost, RMB 10,000/kmu 24—transmission line unit length erection cost, RMB 10,000/ks Li—main road length, km
L.—branch road length, kms||tt ||L9---length of the road to the field, km.
Regarding the solution of L1, Gong2, L, after the geographical coordinates of the platform are determined, according to the principle that each platform must be connected by a road, the Kruskal algorithm in graph theory can be used to first find a preliminary plan with the shortest total length of the road leading to each field. In the calculation, special points can be used to add different weights to the edges to deal with existing roads, rivers, villages and geographical environment restrictions. After obtaining the preliminary solution 2
SY/T 5505—92
After the case: the main flat road, branch road and well site road are further determined according to the busyness of transportation through a certain section of highway and relevant highway paving specifications.
3.2.5.3 Drilling rig moving and installation costs
The installation costs consist of three parts, namely, fire moving costs, medium moving costs and small moving costs. The calculation formula is: C,=μain+μa2(rn)+μs(n.-r) In the formula, G3
Drilling rig moving and installation costs, 10,000 yuan,
The cost of a large move, that is, the drilling rig The cost of moving to a new platform 1 is RMB 10,000. The cost of moving once is the cost of moving and installing between groups on a platform. The cost of moving once is the cost of moving between ports in the same group. (8)
The total number of well groups in the block is the sum of the number of groups in each platform. If there is no group division on the platform, the number of non-groups on the platform is 1
3.2.5.4 Oil and gas gathering and transportation costs
The oil and gas gathering and transportation costs mainly include the pipeline costs from the port to the metering station, from the metering station to the transfer station, and the construction costs of the metering station. Taking into account the convenience of management, the metering station is usually built on the platform, and the transfer station is built on the platform with the metering base station. The cost formula is: min
ma'thirdy
+ ms- Shi+ Pi+μas' n.
4ttaizhz
.mgi2ir -S2
(h1-1,2,*+*gnb)
(ii-1,2....n)
(j=1,2,..., np)
P,·miu=niSni1
(G1-1,2,ne)
(h2-1,2, .-+ne).
(j2-1,2,m)
(j1=1,2, ,e)
mimiaint
=n12nj2p
In the formula, C4-
Oil and gas gathering and transportation costs, square yuan!
Total number of metering stations, seats
(i2-I,2,*+n.
Total number of transfer stations, seats
H4—Expense of unit length of oil pipeline from platform to metering station, ten thousand yuan/k1*40——Construction cost of metering station, ten thousand yuan, Expenses of unit length of oil pipeline between metering station and transfer station, square yuan/cut ft4
（9）
SY/T 5505—92
The maximum number of wells that the No. metering station can measure, the maximum number of wells that the No. i transfer station can transfer, tiit2i22*mm1, are four groups of 01 variables, which are defined as follows: 1. The No. metering station is located in the,On the No. platform, tiud
t21242
m1i2/1
Lo The No. metering station is not located on the No. platform, rl The No. j2 transfer station is located on the No. metering station, 10 The No. 12 transfer station is not located on the No. 2 metering station, 1 The oil wells on the No. platform are measured by the No. i metering station, lo The oil wells on the No. 1 platform are not measured by the No. i metering station, 1 The oil measured by the No. i metering station is transferred by the No. transfer station, lo The oil measured by the No. metering station is not transferred by the No. transfer station, f. () The total number of meters measured by the metering station affects the cost of the oil pipeline from the metering station to the transfer station. Generally, it can be assumed to be a linear function of n:
The total number of tons of oil measured by the No. metering station, 口1-The distance between the No. platform and the No. i platform, km The distance between the No. 2 metering station and the No. metering station, km. Sh(x+ x+(yh-y))
Wu, (,), () are the coordinates of the two platforms. SpE(x.)\+(y2 yin))
Where: (x*yh), (xiyn)-
are the coordinates of the two metering stations.
When solving equation (5), it can be divided into two parts, C4 and CC4t
ji=l hr:
C pt+tin +mn -Shy+P,+ao ++
Szhafi(nin)
μi22k2m2h
In equation (20), the number of metering stations can be determined according to the oil field production capacity. After it is determined, the optimization problem of equation (20) can be solved by the same method of solving the platform position.
After the location of the metering station is selected, the optimization problem of equation (21) can be solved in the same way. 3.2.5.5 Water injection pipeline cost
The water injection pipeline cost only calculates the water injection pipeline cost between the water injection station and the water injection well, and assumes that the water injection station is set up on platform 1. Its cost expression is:
=1 h,-1 1
t3 i3t
.Saae+fr(s)+
(k3=1,2,+, n)
(j9=1.2,-**gn)
(j=1,2,..n.)
mzig =higniao
(ja=1,2,*+*,n)
In the formula, Cs-
Water injection pipeline cost, 10,000 yuan,
Total number of water injection stations, 10,000 yuan,
t3jahg, m2i3i
taiahs
SY/T 5505--92
Two groups of 0-1 variables, which are defined as follows: 1 The No. injection station is located on the No. platform, 10 The No. injection station is not located on the No. platform, m3i
1 The injection wells on the No. platform are supplied by the No. injection station, 10 The injection wells on the No. platform are not supplied by the No. injection station. The total number of injection wells drilled on the No. platform, 口1f(s) - The influence function of the total number of injection wells on the platform on the injection pipeline cost between the platform and the injection station, which can generally be assumed to be $. The cost of the unit length of the injection pipeline between the injection station and the platform with injection wells, 10,000 yuan/km - The number of injection wells allocated to the No. injection station: 口 - The maximum number of injection wells allowed by the No. injection station, 口: Ssa,\-- is the distance between the No. platform and the No. platform, km. Ss =(xg -x)\+(yna- y)2-+-
Where: (,), (y)——the coordinates of platform No. and platform No., respectively. The optimization problems given by equations (22) to (26) are solved by alternating the platform optimization problem. 3.2.5.6 Heat injection pipeline cost
This cost mainly considers the cost of the heat injection pipeline between the boiler station and the heat injection well. The boiler station is set on the platform. The calculation formula is minC=
fi=l -1
tAiaky
naarSmfe(H)·ue
t4/4h4 =1
(k+=-1,2,..+,n)
(j4=1,2,→ng)
(j+=1,2,--*gnp)
H,'mu nigsaao
In the formula: C is the cost of heat injection pipeline, square yuan, — the number of boiler stations, seats,
tdia and ar
taigh4
are two sets of 0-1 variables, defined as follows:
The No. boiler station is located on the No. platform,
10The No. boiler station is not located on the No. platform, 2t34i
(-1,2,,*)
{1The gas injection on the No. platform is not injected by the No. boiler station, loThe gas injection well on the No. platform does not inject gas from the No. boiler station: the distance between the No. platform and the No. platform, km. S4hy =r(x -x)2+(yyi)2)
Where: (xy), (x, y))——the coordinates of platform No. and platform No. j respectively H:
The total number of gas wells drilled by platform No. 1, mouth; (28)
(33)
f(II)——the influence function of the total number of heat injection wells on the platform on the cost of heat injection pipes from the platform to the boiler station, \-generally it can be assumed to be a linear function of H;ia
!
SY/T 5505--92
The total number of wells for gas injection at boiler station No. 1, mouth; The maximum number of gas injection wells at boiler station No. 1, mouth i4o
The cost of heat injection pipes per unit length between boiler station and heat injection platform, 10,000 yuan/km. The optimization problem given by (28) to (32) can still be solved by the same method as the previous platform optimization. 3.2.5.7 Completion costs
Completion costs only calculate the additional costs of oil layer casing and tubing compared with vertical wells, and the expression is: C=-AD..
Where: Cr—completion costs, 10,000 yuan:
The sum of the costs of one unit length of oil layer running pipe and tubing, 10,000 yuan/km! AD——the total increased well depth, km.
3.2.5.8 Management costs
Management costs can be estimated by the method commonly used in engineering budget estimates, multiplying the total investment by a percentage, and the expression is.
Where: Cs——management costs, 10,000 yuan
n——the percentage of management costs in the total investment. (35)
3.2.6 By performing the above calculations in 3.2.3 and 3.2.5 for each possible value of n, the optimal solution can be obtained (the optimal solution is always within a certain range of values, so when the value of z changes greatly during the solution process and exceeds the better solution obtained, the better solution obtained can be considered to be the global optimal solution, and there is no need to continue the iteration process). 3.3 Examples
See Appendix A (reference) for examples.
Single platform cluster well design method
The following method should be followed to determine the platform center position. 4.1 The sum of total horizontal displacement is the shortest, and its expression is S,=s
4.2 The total wellbore length is the shortest, and its expression is: min
The sum of total wellbore length and horizontal displacement is the shortest, and its expression is: 4.3
min MSi- Z(MD,+Si,).
4.4 The total drilling cost is the lowest, and its expression is: Efi(Smh)
minfi-
In the formula, the total drilling investment for the wells drilled on the No. platform is 10,000 yuan. (36)
4.5 The platform position (α,) obtained by the above model has little difference, and the wellheads on the platform are still arranged further apart, so one of the models can be selected and solved by the optimization method. 5 Platform wellhead layout
5.1 Layout principle
SY/T 5505—92
The wellhead layout in the platform should meet the requirements of ground and drilling and construction convenience and safety, and consider the requirements of oil construction, oil production and well repair. 5.2 Basic practice of wellhead layout
a. Design of a straight well:
b. The wellhead arrangement method should consider the local climate and wind and take into account the large displacement. C. Single row is suitable for platforms with a small number of wells to be drilled, and multiple rows are suitable for platforms with a dozen to dozens of wells. Circular and square are suitable for platforms with a large number of wells to be drilled. D. Row spacing: generally 30~~50 meters. E. The wellhead spacing is generally 3~~5m.
Optimized wellbore trajectory
The design method of single wellbore and wellbore trajectory shall be carried out in accordance with the provisions of SY/T5435, and the following factors shall be considered at the same time. 6.1 Selection of the inclination point
The inclination points of two adjacent wells should be staggered by a certain distance, generally not less than 30m. 6.2 Track anti-collision check
If there are drilled wells within the control area of the platform and they are not far from the designed track, you should use anti-collision technology to check. SY/T 5505--92
Appendix A
Example of overall planning for cluster well development platform setting in Du 48 block of Liaohe Oilfield (reference)
Du 48 block of Shu 1 area of Liaohe Oilfield is a heavy oil block with poor ground conditions and dense well network. Considering the construction of drilling and oil and gas gathering and transportation system, it is decided to develop this block by cluster well mining. There are 123 wells in this block. 26 wells have been drilled, and the ground gathering and transportation planning is calculated as 149 wells.
According to the characteristics of this block and the requirements for the development of the block, the project items that affect the investment of oilfield construction under the two different development plans of cluster well and Yisheng are comprehensively analyzed. The following expenses are involved in the planning and calculation in the optimization design.
A1 Drilling and Merger Costs
Multivariate stepwise regression is performed on the cost data of wells drilled in adjacent blocks to obtain the following variation patterns of drilling costs with well displacement and vertical depth:
a. Vertical well: f1(S*h)=0.815+0.038×hb. Directional well, f(Szsh)=-0.2388+0.058×h-0.16×10-4×h/+0.05×Si(S<150m）
fi(Su*h)=21.6362×1g()—1.147×St+31.35×10-4Si(Si2-150m)
A2 Platform Construction Costs
Depending on the size of the platform, the calculation method varies with the layout of the platform. In Du 48 blocks, there are single-row and double-row layouts. Single row, =1782, b=165, 1-19×10-10,000 yuan/m, then Cr= ≥ 0. 0019×E1782+165×(ni-1))jl
Double row well, a3577,6=365, then
C10.0019×[3577+365×(n-1)]j=l
A3 Moving and installation fee
It is calculated as 13,000 yuan for a large move and 0.5 yuan for a small move. A4 Highway construction cost
a: Determine the path length and use graph theory to find the shortest tree. b Road construction fee, platform road is 0.8433 yuan/km, branch road is 138,400 yuan/km. A5 Power grid system cost
Mainly considers 6kV power grid line. The power grid is laid along the road. The unit length cost is 15,400 yuan/km. If a metering station or transfer station is set up on the platform, two transformers and a distribution room are required. The transformer is 9,200 yuan/unit and the distribution room is 236,300 yuan/unit. A6 Oil well commissioning
This cost only considers the increase in the length of the well section due to the use of cluster development. The cost of the added oil layer casing and oil pipe is 2,600 yuan/t for the diameter of 117.8m11N80 oil layer casing and 3,500 yuan/t for the diameter of 88.9mm pipe. A Oil and gas gathering and transportation system cost
Because of this aspect, it is mainly the book saving on pipelines. The station pipeline is 121,000 yuan/km. There are two pipelines in the well station, the oil gathering pipeline is 38,250 yuan/km, the thin oil pipeline is 51,230 yuan/km, totaling 89,480 yuan/km. The equipment cost of the station is 614,000 yuan/seat. A8 Heat injection system cost
SY/T 5505-—92
The heat injection pipeline is calculated at 287,000 yuan/km.
A9 In addition, there is another cost saving of pipes, which is not included in the calculation because the calculation is more complicated and the changes are also large. A10 Based on the above data, the platform planning and design software package is applied to obtain the following optimization results. aThe total drilling cost is 57.718 million yuan, and the optimal number of platforms is 15. The positions of each platform and the number of distribution are shown in Table A1. Table A1
Equally divided position
Pi(499,100)
P2(131,440)
P:(398,399)
Pa(600,600)
P.(300, 799)
Pa(600,850)
P(1348,952)
Pa(400,1100)
Distributed number of liters
6 wells
9 wells
11 wells:
120 wells
3 wells
b. The platform construction cost C. is 1.7814 million yuan, C. highway and power transmission line cost C is 36.97 square yuan, d. drilling and relocation cost Cs is 7.41 square yuan, e. oil and gas gathering and transportation cost C is 14.3226 million yuan, f. heat injection pipeline cost C6 is 315,000 yuan, 9. well completion cost C is 217,000 yuan.
The total cost of the above items is 7479.78 yuan. The sound should be sent
1(786, :200)
P1:(1150.1200)
Hr(i550,1200)
P/2(962,:489)
Pi(13ct,i5io)
Pr.(1599,1401)
P1s(1000,800)
Additional remarks:
This standard was proposed and technically managed by the Petroleum Drilling Engineering Professional Standardization Committee. This standard was drafted by the Drilling Institute of the Petroleum Exploration and Development Research Institute. The drafters of this standard were Chen Zuguo and Ge Yunhua. Number of allocated materials
12 wells
12 wells per day
9 wells
9 yuan and
This standard will continue to be effective after the review in 199. The review results have been approved by the State Administration of Petroleum and Chemical Industry.10,000 yuan/km. There are two well station pipelines, the oil gathering pipeline is 38,250 yuan/km, the thin oil pipeline is 51,230 yuan/km, totaling 89,480 yuan/km. The station equipment fee is 614,000 yuan/seat. A8 Heat injection system cost
SY/T 5505-—92
The heat injection pipeline is calculated at 287,000 yuan/km.
A9 In addition, there is another item of pipe cost saving, which is not included in the calculation because the calculation is more complicated and the changes are also large. A10 Based on the above data, the platform planning and design software package is applied to obtain the following optimization results. aThe total drilling cost is 57.718 million yuan, and the optimal number of platforms is 15. The positions of each platform and the number of distribution are shown in Table A1. Table A1
Equally divided positionbZxz.net
Pi(499,100)
P2(131,440)
P:(398,399)
Pa(600,600)
P.(300, 799)
Pa(600,850)
P(1348,952)
Pa(400,1100)
Distributed number of liters
6 wells
9 wells
11 wells:
120 wells
3 wells
b. The platform construction cost C. is 1.7814 million yuan, C. highway and power transmission line cost C is 36.97 square yuan, d. drilling and relocation cost Cs is 7.41 square yuan, e. oil and gas gathering and transportation cost C is 14.3226 million yuan, f. heat injection pipeline cost C6 is 315,000 yuan, 9. well completion cost C is 217,000 yuan.
The total cost of the above items is 7479.78 yuan. The sound should be sent
1(786, :200)
P1:(1150.1200)
Hr(i550,1200)
P/2(962,:489)
Pi(13ct,i5io)
Pr.(1599,1401)
P1s(1000,800)
Additional remarks:
This standard was proposed and technically managed by the Petroleum Drilling Engineering Professional Standardization Committee. This standard was drafted by the Drilling Institute of the Petroleum Exploration and Development Research Institute. The drafters of this standard were Chen Zuguo and Ge Yunhua. Number of allocated materials
12 wells
12 wells per day
9 wells
9 yuan and
This standard will continue to be effective after the review in 199. The review results have been approved by the State Administration of Petroleum and Chemical Industry.10,000 yuan/km. There are two well station pipelines, the oil gathering pipeline is 38,250 yuan/km, the thin oil pipeline is 51,230 yuan/km, totaling 89,480 yuan/km. The station equipment fee is 614,000 yuan/seat. A8 Heat injection system cost
SY/T 5505-—92
The heat injection pipeline is calculated at 287,000 yuan/km.
A9 In addition, there is another item of pipe cost saving, which is not included in the calculation because the calculation is more complicated and the changes are also large. A10 Based on the above data, the platform planning and design software package is applied to obtain the following optimization results. aThe total drilling cost is 57.718 million yuan, and the optimal number of platforms is 15. The positions of each platform and the number of distribution are shown in Table A1. Table A1
Equally divided position
Pi(499,100)
P2(131,440)
P:(398,399)
Pa(600,600)
P.(300, 799)
Pa(600,850)
P(1348,952)
Pa(400,1100)
Distributed number of liters
6 wells
9 wells
11 wells:
120 wells
3 wells
b. The platform construction cost C. is 1.7814 million yuan, C. highway and power transmission line cost C is 36.97 square yuan, d. drilling and relocation cost Cs is 7.41 square yuan, e. oil and gas gathering and transportation cost C is 14.3226 million yuan, f. heat injection pipeline cost C6 is 315,000 yuan, 9. well completion cost C is 217,000 yuan.
The total cost of the above items is 7479.78 yuan. The sound should be sent
1(786, :200)
P1:(1150.1200)
Hr(i550,1200)
P/2(962,:489)
Pi(13ct,i5io)
Pr.(1599,1401)
P1s(1000,800)
Additional remarks:
This standard was proposed and technically managed by the Petroleum Drilling Engineering Professional Standardization Committee. This standard was drafted by the Drilling Institute of the Petroleum Exploration and Development Research Institute. The drafters of this standard were Chen Zuguo and Ge Yunhua. Number of allocated materials
12 wells
12 wells per day
9 wells
9 yuan and
This standard will continue to be effective after the review in 199. The review results have been approved by the State Administration of Petroleum and Chemical Industry.
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