Method, Device and Equipment for Selecting Key Geological Parameters of a To-Be-Prospected Block

An electronic device comprising:

• a non-transitory memory storage comprising instructions;
• and
• one or more processors in communication with the memory storage, wherein the instructions, when executed by the one or more processors, cause the electronic device to:
• obtain first sampling values of key geological parameters of m comparison blocks, wherein the m comparison blocks are selected from a plurality of known blocks, each comparison block of the m comparison blocks comprises p key geological parameters, and each key geological parameter of a g-th comparison block of the m comparison blocks has ng first sampling values, and wherein m, p, g and ng are positive integers, and g=1, 2, . . . , m;
• obtain m sets of second sampling values of a to-be-prospected block with an unconventional oil and gas resource, wherein the m sets of second sampling values correspond one-to-one to the m comparison blocks, and each of the m sets of second sampling values comprises p second sampling values that correspond one-to-one to p geological parameters of the to-be-prospected block, and wherein the p geological parameters of the to-be-prospected block correspond one-to-one to and are same as the p key geological parameters of a corresponding comparison block of the m comparison blocks;
• input first sampling values of the m comparison blocks and second sampling values of the to-be-prospected block to a first model to calculate m similarity probabilities of the to-be-prospected block relative to the m comparison blocks, respectively, the first model being represented as:
• F
• g
• (
• Y
• )
• =
• ln
• ⁢
• q
• g
• +
• Y
• ′
• ⁢
• S
• -
• 1
• ⁢
• X
• _
• g
• -
• 1
• 2
• ⁢
• X
• g
• ′
• ¯
• ⁢
• S
• -
• 1
• ⁢
• X
• g
• ,
• ¯
• wherein:
• Fg(Y) denotes a g-th similarity probability of the to-be-prospected block relative to the g-th comparison block of the m comparison blocks;
• ln qg denotes natural logarithm of qg, qq is a g-th prior probability of the g-th comparison block and qg=ng/N, and N=n1+n2+n3+ . . . +ng+ . . . ++nm;
• Y′ denotes a matrix of a g-th set of second sampling values of the m sets of second sampling values of the to-be-prospected block, the g-th set of second sampling values corresponds to the g-th comparison block, Y′=[y1, y2, y3, . . . , yp], and y1 to yp are p second sampling values of the g-th set of second sampling values;
• S−1 is an inverse matrix of S,
• S
• =
• ∑
• g
• =
• 1
• m
• S
• g
• /
• (
• N
• -
• m
• )
• ,
• Sg is a deviation matrix of the g-th comparison block and Sg=[Skt(g)]p×p, wherein
• S
• k
• ⁢
• t
• (
• g
• )
• =
• ∑
• j
• =
• 1
• n
• g
• (
• x
• g
• ⁢
• j
• ⁢
• k
• -
• x
• g
• ·
• k
• )
• ⁢
• (
• x
• g
• ⁢
• i
• ⁢
• k
• -
• x
• g
• ·
• k
• )
• ,
• xgjk is a j-th first sampling value of a k-th key geological parameter of the p key geological parameters of the g-th comparison block, xgik is a i-th first sampling value of the k-th key geological parameter of the p key geological parameters of the g-th comparison block, xg·k is a mean of the ng first sampling values of the k-th key geological parameter of the p key geological parameters of the g-th comparison block,
• X
• g
• ,
• k
• =
• 1
• n
• g
• ⁢
• ∑
• j
• =
• 1
• n
• g
• ⁢
• x
• g
• ⁢
• j
• ⁢
• k
• ,
• k
• =
• 1
• ,
• 2
• ,
• …
• ,
• p
• ,
• both i and j are positive integer, and i≠j;
• X
• ¯
• g
• =
• [
• x
• g
• ·
• 1
• x
• g
• ·
• 2
• ⋮
• x
• g
• ·
• p
• ]
• ,
• wherein xg·l to xg·p are respective means of the ng first sampling values of the p key geological parameters of the g-th comparison block;
• and
• X′g is a transposed matrix of Xg;
• obtain m analogy probabilities of the to-be-prospected block relative, respectively, to the m comparison blocks based on the m similarity probabilities of the to-be-prospected block relative to the m comparison blocks, wherein the m analogy probabilities correspond one-to-one with the m similarity probabilities;
• select a first comparison block from the m comparison blocks as a most relevant block of the to-be-prospected block based on the m analogy probabilities of the to-be-prospected block relative to the m comparison blocks;
• and
• select p key geological parameters of the to-be-prospected block from geological parameters of the to-be-prospected block, wherein the p key geological parameters of the to-be-prospected block correspond one-to-one to and are same as the p key geological parameters of the first comparison block.

A non-transitory computer readable storage medium storing a computer executable program, wherein when the computer executable program is executed by a processor, a method is performed, and the method comprises:

• obtaining first sampling values of key geological parameters of m comparison blocks, wherein the m comparison blocks are selected from a plurality of known blocks, each comparison block of the m comparison blocks comprises p key geological parameters, and each key geological parameter of a g-th comparison block of the m comparison blocks has ng first sampling values, and wherein m, p, g and ng are positive integers, and g=1, 2, . . . , m;
• obtaining m sets of second sampling values of a to-be-prospected block with an unconventional oil and gas resource, wherein the m sets of second sampling values correspond one-to-one to the m comparison blocks, and each of the m sets of second sampling values comprises p second sampling values that correspond one-to-one to p geological parameters of the to-be-prospected block, and wherein the p geological parameters of the to-be-prospected block correspond one-to-one to and are same as the p key geological parameters of a corresponding comparison block of the m comparison blocks;
• inputting first sampling values of the m comparison blocks and second sampling values of the to-be-prospected block to a first model to calculate m similarity probabilities of the to-be-prospected block relative to the m comparison blocks, respectively, the first model being represented as:
• F
• g
• (
• Y
• )
• =
• ln
• ⁢
• q
• g
• +
• Y
• ′
• ⁢
• S
• -
• 1
• ⁢
• X
• _
• g
• -
• 1
• 2
• ⁢
• X
• g
• ′
• ¯
• ⁢
• S
• -
• 1
• ⁢
• X
• g
• ,
• ¯
• wherein:
• Fg(Y) denotes a g-th similarity probability of the to-be-prospected block relative to the g-th comparison block of the m comparison blocks;
• ln qg denotes natural logarithm of qg, qg is a g-th prior probability of the g-th comparison block and qgg=ng/N, and N=n1+n2+n3+ . . . +ng+ . . . ++nm;
• Y′ denotes a matrix of a g-th set of second sampling values of the m sets of second sampling values of the to-be-prospected block, the g-th set of second sampling values corresponds to the g-th comparison block, Y′=[y1, y2, y3, . . . , yp], and y1 to yp are p second sampling values of the g-th set of second sampling values;
• S−1 is an inverse matrix of S,
• S
• =
• ∑
• g
• =
• 1
• m
• S
• g
• /
• (
• N
• -
• m
• )
• ,
• Sg is a deviation matrix of the g-th comparison block and Sg=[Skt(g)]p×p, wherein
• S
• k
• ⁢
• t
• (
• g
• )
• =
• ∑
• j
• =
• 1
• n
• g
• (
• x
• g
• ⁢
• j
• ⁢
• k
• -
• x
• g
• ·
• k
• )
• ⁢
• (
• x
• g
• ⁢
• i
• ⁢
• k
• -
• x
• g
• ·
• k
• )
• ,
• xgjk is a j-th first sampling value of a k-th key geological parameter of the p key geological parameters of the g-th comparison block, xgik is a i-th first sampling value of the k-th key geological parameter of the p key geological parameters of the g-th comparison block, xg·k is a mean of the ng first sampling values of the k-th key geological parameter of the p key geological parameters of the g-th comparison block,
• X
• g
• ,
• k
• =
• 1
• n
• g
• ⁢
• ∑
• j
• =
• 1
• n
• g
• ⁢
• x
• g
• ⁢
• j
• ⁢
• k
• ,
• k
• =
• 1
• ,
• 2
• ,
• …
• ,
• p
• ,
• both i and j are positive integer, and i≠j;
• X
• ¯
• g
• =
• [
• x
• g
• ·
• 1
• x
• g
• ·
• 2
• ⋮
• x
• g
• ·
• p
• ]
• ,
• wherein xg·l to xg·p are respective means of the ng first sampling values of the p key geological parameters of the g-th comparison block;
• and
• XX′g is a transposed matrix of Xg;
• obtaining m analogy probabilities of the to-be-prospected block relative, respectively, to the m comparison blocks based on the m similarity probabilities of the to-be-prospected block relative to the m comparison blocks, wherein the m analogy probabilities correspond one-to-one with the m similarity probabilities;
• selecting a first comparison block from the m comparison blocks as a most relevant block of the to-be-prospected block based on the m analogy probabilities of the to-be-prospected block relative to the m comparison blocks;
• and
• selecting p key geological parameters of the to-be-prospected block from geological parameters of the to-be-prospected block, wherein the p key geological parameters of the to-be-prospected block correspond one-to-one to and are same as the p key geological parameters of the first comparison block.