CN110400093B - Shale oil industrial value grade evaluation method and device and electronic equipment - Google Patents
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Abstract
The invention provides a method, a device and electronic equipment for evaluating the industrial value grade of shale oil, wherein the method comprises the steps of obtaining the rhythm layer thickness, the abundance of movable hydrocarbon, the brittleness index and the flow index of each rhythm layer of a gyrus unit to be evaluated in a target shale stratum; calculating the abundance, brittleness index and flow index of the movable hydrocarbon of the gyre unit to be evaluated according to the thickness, the abundance, the brittleness index and the flow index of the movable hydrocarbon of each prosodic layer; calculating an oil-containing index according to the abundance of the movable hydrocarbon of the to-be-evaluated cycle unit, and calculating a fracturing index according to the brittleness index of the to-be-evaluated cycle unit; calculating the shale oil industrial coefficient of the to-be-evaluated convolution unit according to the oil index, the fracturing index and the flow index of the to-be-evaluated convolution unit; and determining the industrial value grade of the gyrus unit to be evaluated according to the shale oil industrial coefficient. The method can quantify the industrial development potential of the shale oil in the target shale stratum and improve the reliability of the shale oil industrial development evaluation result.
Description
Technical Field
The invention relates to the technical field of oil exploration, in particular to a shale oil industrial value grade evaluation method and device and electronic equipment.
Background
The exploration example proves that the shale oil and gas resource amount is rich, and the dessert section has the condition of forming stable industrial oil and gas flow after being engineered. For the oil gas deposit, the conventional oil gas is deposited in a favorable trap after primary migration and secondary migration; the dense oil gas is transported and accumulated in short distance to form reservoir through source storage pressure difference; unlike conventional oil gas and dense oil gas, shale oil has the features of self-generation, self-storage, source-storage and in-situ oil gas accumulation.
At present, the conventional oil gas and dense oil gas evaluation method is still used for the industrial development and evaluation of the shale oil, the evaluation method respectively evaluates the shale oil only through single factors such as source rock characteristics, reservoir characteristics and the like, the characteristic of the shale oil of self-generation and self-storage is ignored, and the reliability of the evaluation result is poor. In addition, the existing evaluation methods also do not enable the industrial development potential of shale oil in the target shale formation.
Disclosure of Invention
In view of the above, the present invention provides a method, an apparatus, and an electronic device for evaluating an industrial value grade of shale oil, which can improve reliability of an evaluation result of shale oil industrial development and can quantify an industrial development potential of shale oil in a target shale formation.
In a first aspect, an embodiment of the present invention provides a method for evaluating a shale oil industrial value grade, including: obtaining the prosodic layer thickness, the abundance of movable hydrocarbon, the brittleness index and the flow index of each prosodic layer of a gyrus unit to be evaluated in a target shale stratum; calculating the abundance, brittleness index and flow index of the movable hydrocarbon of the gyre unit to be evaluated according to the thickness, the abundance, the brittleness index and the flow index of the movable hydrocarbon of each prosodic layer; calculating the oil-containing index of the to-be-evaluated gyre unit according to the abundance of the movable hydrocarbon of the to-be-evaluated gyre unit, and calculating the fracturing index of the to-be-evaluated gyre unit according to the brittleness index of the to-be-evaluated gyre unit; calculating the shale oil industrial coefficient of the to-be-evaluated convolution unit according to the oil index, the fracturing index and the flow index of the to-be-evaluated convolution unit; and determining the industrial value grade of the gyrus unit to be evaluated according to the shale oil industrial coefficient.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein a calculation formula for calculating the abundance of the movable hydrocarbon of the cyclic unit to be evaluated according to the thickness of the prosody layer and the abundance of the movable hydrocarbon of each prosody layer is as follows:
wherein A is the abundance of the mobile hydrocarbon of the gyrocompartment to be evaluated, liAbundance of mobile hydrocarbons as the i-th prosodic layer, diIs the thickness of the prosodic layer of the ith prosodic layer, and n is the number of the prosodic layers of the gyrus unit to be evaluated.
With reference to the first possible implementation manner of the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein the calculation formula for calculating the oil-content index of the cyclic unit to be evaluated according to the abundance of the movable hydrocarbons of the cyclic unit to be evaluated is as follows:
in the formula IoThe oil index of the cyclic unit to be evaluated, and A is the abundance of the mobile hydrocarbon of the cyclic unit to be evaluated.
In combination with the first aspect, the inventionAn embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein a calculation formula for calculating the brittleness index of the convolution unit to be evaluated according to the thickness of the prosodic layer and the brittleness index of each prosodic layer is as follows:
wherein B is the brittleness index of the gyrotron cell to be evaluated, BiIs the brittleness index of the i-th prosodic layer, diIs the thickness of the prosodic layer of the ith prosodic layer, and n is the number of the prosodic layers of the gyrus unit to be evaluated.
With reference to the third possible implementation manner of the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein a calculation formula for calculating the fracture index of the cyclic unit to be evaluated according to the brittleness index of the cyclic unit to be evaluated is as follows:
in the formula, EfIs the fracture index of the cyclic unit to be evaluated, B is the brittleness index of the cyclic unit to be evaluated, BiIs the brittleness index of the i-th prosodic layer, diThe sum of the average values of the n and the Avg is the rhythm layer thickness of the ith rhythm layer, n is the number of the rhythm layer of the gyrus unit to be evaluated, and Avg represents the average value; mid1/41/4 digits representing the fetch group; mid3/43/4 digits representing the fetch group; min represents taking the minimum value.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where a calculation formula for calculating a flow index of the convolution unit to be evaluated according to the prosody layer thickness and the flow index of each prosody layer is as follows:
in the formula IfFlow index of the gyrotron cell to be evaluated, piIs the flow index of the i-th prosodic layer, diIs the thickness of the prosodic layer of the ith prosodic layer, and n is the number of the prosodic layers of the gyrus unit to be evaluated.
In combination with the first aspect, the embodiment of the invention providesIn a sixth possible implementation manner of the first aspect, the above calculation formula for calculating the shale oil industry index of the cyclic unit to be evaluated according to the oil content index, the fracture index and the flow index of the cyclic unit to be evaluated is as follows:
in which ESO is the shale oil industry coefficient of the gyre unit to be evaluated, IoOil index of the gyratory unit to be evaluated, EfFracturing index of the gyratory unit to be evaluated, IfThe flow index of the gyrotron cell to be evaluated.
With reference to the sixth possible implementation manner of the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, where the step of evaluating the industrialization value of the cyclic unit to be evaluated according to the shale oil industry factor includes: if the ESO is more than or equal to 0.8, dividing the gyrus unit to be evaluated into type I desserts; if the ESO is more than or equal to 0.6 and less than 0.8, dividing the gyrus unit to be evaluated into II desserts; if the ESO is more than or equal to 0.4 and less than 0.6, dividing the gyrus unit to be evaluated into a type III dessert; if ESO is less than 0.4, the cyclic unit to be evaluated is divided into cyclic units without industrial exploitation value.
In a second aspect, an embodiment of the present invention further provides a device for evaluating a shale oil industrial value grade, including: the system comprises a rhythm layer parameter acquisition module, a movable hydrocarbon abundance, a brittleness index and a flow index, wherein the rhythm layer parameter acquisition module is used for acquiring the rhythm layer thickness, the movable hydrocarbon abundance, the brittleness index and the flow index of each rhythm layer of a to-be-evaluated gyrus unit in a target shale stratum; the first calculation module of the parameter of the convolution unit is used for calculating the abundance, the brittleness index and the flow index of the movable hydrocarbon of the convolution unit to be evaluated according to the thickness, the abundance, the brittleness index and the flow index of the prosody layer of each prosody layer; the second calculation module of the cycle unit parameter is used for calculating the oil-containing index of the cycle unit to be evaluated according to the abundance of the movable hydrocarbon of the cycle unit to be evaluated and calculating the fracturing index of the cycle unit to be evaluated according to the brittleness index of the cycle unit to be evaluated; the shale oil industrial coefficient calculation module is used for calculating the shale oil industrial coefficient of the to-be-evaluated convolution unit according to the oil content index, the fracturing index and the flow index of the to-be-evaluated convolution unit; and the industrialization value grade determining module is used for determining the industrialization value grade of the to-be-evaluated convolution unit according to the shale oil industry coefficient.
In a third aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory, where the memory stores computer-executable instructions capable of being executed by the processor, and the processor executes the computer-executable instructions to implement the shale oil industrial value grade evaluation method.
The embodiment of the invention has the following beneficial effects:
the method comprises the steps of obtaining the prosodic layer thickness, the abundance of movable hydrocarbon, the brittleness index and the flow index of each prosodic layer of a gyral unit to be evaluated in a target shale stratum; calculating the abundance, brittleness index and flow index of the movable hydrocarbon of the gyre unit to be evaluated according to the thickness, the abundance, the brittleness index and the flow index of the movable hydrocarbon of each prosodic layer; calculating the oil-containing index of the to-be-evaluated gyre unit according to the abundance of the movable hydrocarbon of the to-be-evaluated gyre unit, and calculating the fracturing index of the to-be-evaluated gyre unit according to the brittleness index of the to-be-evaluated gyre unit; calculating the shale oil industrial coefficient of the to-be-evaluated convolution unit according to the oil index, the fracturing index and the flow index of the to-be-evaluated convolution unit; and determining the industrial value grade of the gyrus unit to be evaluated according to the shale oil industrial coefficient. In the method, by setting a shale oil industrial coefficient, the shale oil industrial coefficient is based on the shale oil reservoir formation rule, and the influences of the brittleness index, the fracturing index and the flow index of each rhythm layer of a gyrus unit to be evaluated in a target shale stratum are integrated, wherein the brittleness index reflects the fracturing efficiency of the target shale stratum, the fracturing index reflects the fracture communication capacity of the target shale stratum after fracturing, and the flow index reflects the capacity of the shale oil entering a fracture network when the pressure of the target shale stratum is released, so that the method can quantify the industrial development potential of the shale oil in the target shale stratum and improve the reliability of the shale oil industrial development evaluation result.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic flow chart of a shale oil industrial value grade evaluation method provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of an evaluation result obtained by evaluation according to a shale oil industrial value grade evaluation method according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a shale oil industrial value evaluation device provided by an embodiment of the invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Icon: 31-a prosodic layer parameter acquisition module; 32-a first calculation module of the parameter of the gyrus unit; 33-a second calculation module of the rotation unit parameters; 34-a shale oil industrial coefficient calculation module; 35-an industrialization value grade determining module; 40-a memory; 41-a processor; 42-a bus; 43-communication interface.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In consideration of the problems that the evaluation result of the existing industrialized evaluation method for the shale oil is poor in reliability and the industrial development potential of the shale oil in the target shale formation cannot be quantified, the method, the device and the electronic equipment for evaluating the industrial value grade of the shale oil provided by the embodiment of the invention can improve the reliability of the industrial development evaluation result of the shale oil and can quantify the industrial development potential of the shale oil in the target shale formation.
For the convenience of understanding the embodiment, a method for evaluating the industrial value grade of shale oil disclosed by the embodiment of the invention is described in detail first.
The first embodiment is as follows:
as shown in fig. 1, which is a schematic flow chart of a shale oil industrial value grade evaluation method provided by an embodiment of the present invention, as can be seen from fig. 1, the method includes the following steps:
step S102: and acquiring the prosodic layer thickness, the abundance of movable hydrocarbon, the brittleness index and the flow index of each prosodic layer of the gyrus unit to be evaluated in the target shale stratum.
Here, the gyrus is a structural phenomenon existing in a stratum, and the gyrus layer refers to a stratum composed of a series of different rocks formed due to the constant change of a deposition environment in the periodic sea advance and sea retreat processes. In this embodiment, a convolution element is a convolution layer. There are typically multiple cyclic units in shale formations that contain oil. Secondly, the rhythm layer is also called rhythm layer theory, and the horizontal layer of the sand-mud interlayer is a line-layer interlayer formed by single layers with different colors, different components and different granularities when the thickness is thinner (less than 4-5 mm), which is called rhythm layer theory.
Firstly, for a to-be-evaluated convolution unit in a target shale stratum, acquiring the prosodic layer thickness, the abundance of movable hydrocarbons, the brittleness index and the flow index of each prosodic layer of the to-be-evaluated convolution unit. The hydrocarbon is a hydrocarbon and is one of organic compounds, and the movable hydrocarbon refers to movable hydrocarbons, such as petroleum, natural gas, and the like. The abundance refers to the relative share of the weight of a chemical element in a natural body in the total weight of the natural body, the abundance of movable hydrocarbon reflects the content of movable oil and gas in the shale stratum, and the larger the value of the abundance of movable hydrocarbon, the higher the content of movable oil and gas in the stratum. And, the brittleness index reflects the fracturing efficiency of the shale formation, and the larger the value, the easier the shale formation is fractured. The flow index reflects the ability of shale oil to enter a fracture network when the pressure is released from the shale formation.
Step S104: and calculating the abundance of the movable hydrocarbon, the brittleness index and the flow index of the gyre unit to be evaluated according to the thickness of the prosodic layer, the abundance of the movable hydrocarbon, the brittleness index and the flow index of each prosodic layer.
In one possible embodiment, the movable hydrocarbon abundance of the cyclic unit to be evaluated may be calculated from the prosodic layer thickness and the movable hydrocarbon abundance of each prosodic layer in the cyclic unit to be evaluated. For example, assuming that the number of prosodic layers included in the gyral unit to be evaluated is n, the number of the prosodic layers is 1 and 2 · n from bottom to top in the vertical direction, the thickness of each prosodic layer is d1 and d2 · dn, and the abundance of the movable hydrocarbon corresponding to each prosodic layer is l1、l2···ln(ii) a The formula for calculating the abundance of the mobile hydrocarbons of the cyclic unit to be evaluated is:
wherein A is the abundance of movable hydrocarbons in the cyclic unit to be evaluated in kg/t; liIs the movable hydrocarbon abundance of the ith prosodic layer in kg/t; diThe thickness of the prosodic layer of the ith prosodic layer is m; n is the number of prosodic layers of the gyrus unit to be evaluated.
And calculating the brittleness index of the convolution unit to be evaluated according to the thickness of the prosodic layer of each prosodic layer in the convolution unit to be evaluated and the brittleness index, wherein the calculation formula is as follows:
in the formula, B is the brittleness index of the gyrus unit to be evaluated and is dimensionless; biThe brittleness index of the ith rhythm layer is dimensionless; diIs the thickness of the prosodic layer of the ith prosodic layer, and n is the number of the prosodic layers of the gyrus unit to be evaluated.
In addition, the flow index of the convolution unit to be evaluated can also be calculated according to the thickness and the flow index of each prosodic layer in the convolution unit to be evaluated, wherein the calculation formula is as follows:
in the formula IfThe flow index of the gyrotron unit to be evaluated is dimensionless; p is a radical ofiIs the flow index of the ith prosodic layer and is dimensionless; diIs the thickness of the prosodic layer of the ith prosodic layer, and n is the number of the prosodic layers of the gyrus unit to be evaluated.
Thus, the abundance of mobile hydrocarbons, brittleness index and flow index of the cyclic unit to be evaluated were obtained.
Step S106: and calculating the oil-containing index of the cyclic unit to be evaluated according to the abundance of the movable hydrocarbon of the cyclic unit to be evaluated, and calculating the fracturing index of the cyclic unit to be evaluated according to the brittleness index of the cyclic unit to be evaluated.
In one embodiment, the oil index of the cyclic unit to be evaluated may be calculated according to the following formula:
in the formula IoThe oil content index of the convolution unit to be evaluated is dimensionless; a is the abundance of mobile hydrocarbons in kg/t of the cyclic unit to be evaluated.
According to the oil content index calculation formula, when the abundance of the movable hydrocarbon of the cyclic unit to be evaluated is less than 1, the cyclic unit to be evaluated is determinedThe oil content index of the convolution unit to be evaluated is 0; when the abundance of the movable hydrocarbon of the cyclic unit to be evaluated is less than 3 and not less than 1, determining the oil content index of the cyclic unit to be evaluated as
And when the abundance of the movable hydrocarbon of the cyclic unit to be evaluated is more than or equal to 3, determining that the oil content index of the cyclic unit to be evaluated is 1.
And, the formula for calculating the fracture index of the cyclic unit to be evaluated according to the brittleness index of the cyclic unit to be evaluated may be:
in the formula, EfIs the fracture index of the cyclic unit to be evaluated, B is the brittleness index of the cyclic unit to be evaluated, BiIs the brittleness index of the i-th prosodic layer, diThe sum of the average values of the n and the Avg is the rhythm layer thickness of the ith rhythm layer, n is the number of the rhythm layer of the gyrus unit to be evaluated, and Avg represents the average value; mid1/41/4 digits representing the fetch group; mid3/43/4 digits representing the fetch group; min represents taking the minimum value.
Wherein, if the number of data in a certain array A is N, the N/4 th data in sequence in the array is Mid1/4(A) Is the 1/4 bit number of array A; similarly, the 3N/4 data in the array is Mid3/4(A) Is the 3/4 bit number of array a.
Step S108: and calculating the shale oil industrial coefficient of the to-be-evaluated convolution unit according to the oil index, the fracturing index and the flow index of the to-be-evaluated convolution unit.
After obtaining the oil index, the fracture index, and the flow index of the cyclic unit to be evaluated, the shale oil industry coefficient of the cyclic unit to be evaluated may be calculated according to the above parameters, and in one embodiment, the shale oil industry coefficient may be calculated according to the following formula:
in which ESO is the shale oil industry coefficient of the gyre unit to be evaluated, IoOil index of the gyratory unit to be evaluated, EfFracturing index of the gyratory unit to be evaluated, IfThe flow index of the gyrotron cell to be evaluated.
Thus, the shale oil industry factor integrates three key indexes that restrict whether shale oil can be industrially developed: oil index, fracture index, and flow index. The shale oil industrial coefficient comprehensively reflects the abundance of shale movable oil gas in the rotary unit, the fracture communication capacity after fracturing and the oil gas seepage capacity after pressure release, so that the comprehensive evaluation of the shale oil industrial coefficient is realized, and the capacity of the target shale stratum which can be industrially utilized can be indicated according to the shale oil industrial coefficient.
Step S110: and determining the industrial value grade of the gyrus unit to be evaluated according to the shale oil industrial coefficient.
Here, the industrial value grade reflects the ability to be industrially utilized, and the higher the grade is, the higher the ability to be industrially utilized is. After obtaining the shale oil industry coefficient of the gyre unit to be evaluated, the industrialization value grade of the gyre unit to be evaluated can be determined according to the coefficient, and in one mode, the grade division is carried out according to the size of the shale oil industry coefficient as follows:
if the ESO is more than or equal to 0.8, dividing the gyrus unit to be evaluated into type I desserts;
if the ESO is more than or equal to 0.6 and less than 0.8, dividing the gyrus unit to be evaluated into II desserts;
if the ESO is more than or equal to 0.4 and less than 0.6, dividing the gyrus unit to be evaluated into a type III dessert;
if ESO is less than 0.4, the cyclic unit to be evaluated is divided into cyclic units without industrial exploitation value.
Thus, when the shale oil industry coefficient of the to-be-evaluated convolution unit is calculated, the to-be-evaluated convolution unit can be divided into desserts of different grades according to the industrial value grading mode. In the process of oil and gas exploration and development, a large-area hydrocarbon-containing area and a large-area hydrocarbon-containing interval are revealed, but only part of the hydrocarbon-containing area and the large-area hydrocarbon-containing interval have good development benefits under the current economic and technical conditions, so the hydrocarbon-containing interval is called a dessert.
And repeating the operation to obtain the shale oil industrial coefficient of each convolution unit in the target shale stratum and obtain the industrial value grade corresponding to each convolution unit.
In actual operation, after the industrialization value grades of all the rotary units in the target shale stratum are obtained, the rotary units with the ESO more than 0.4 are sorted from high to low, and the shale oil development target is selected preferably in turn.
Compared with the traditional shale oil evaluation method, evaluation parameters related to oil and gas hydrocarbon source rocks, reservoirs, brittleness and the like are more than hundreds, the method optimizes the evaluation process by summarizing the shale oil reservoir formation rule, and provides an evaluation method with strong operability and strong practicability, and the evaluation result of the method can be directly applied to the evaluation of the shale oil development potential, and highlights the main geological problems concerned in the shale oil industrial development process. In addition, in the method, the shale fracturing efficiency is evaluated through the brittleness average value and the brittleness dispersion degree of each rhythm layer in the gyrating unit, and the fracture index is used for indicating the fracture communication capacity of the shale in the gyrating unit section after the shale is subjected to engineering fracturing, so that the engineering workload loss caused by invalid fracturing layer sections is effectively avoided. In addition, the method also utilizes the flowing capacity of the oil gas in the shale to indicate the capacity of the shale oil entering a fracture network when the pressure is released after the shale is fractured, thereby effectively ensuring the stable yield capacity of the shale oil in the later development process.
The shale oil industrial value evaluation method provided by the embodiment of the invention comprises the steps of firstly, obtaining the prosodic layer thickness, the abundance of movable hydrocarbon, the brittleness index and the flow index of each prosodic layer of a gyral unit to be evaluated in a target shale stratum; calculating the abundance, brittleness index and flow index of the movable hydrocarbon of the gyre unit to be evaluated according to the thickness, the abundance, the brittleness index and the flow index of the movable hydrocarbon of each prosodic layer; then, calculating the oil-containing index of the to-be-evaluated gyre unit according to the abundance of the movable hydrocarbon of the to-be-evaluated gyre unit, and calculating the fracturing index of the to-be-evaluated gyre unit according to the brittleness index of the to-be-evaluated gyre unit; then, calculating the shale oil industrial coefficient of the to-be-evaluated convolution unit according to the oil content index, the fracturing index and the flow index of the to-be-evaluated convolution unit; and evaluating the industrialization value of the gyre unit to be evaluated according to the shale oil industry coefficient. The method can improve the reliability of the shale oil industrial development evaluation result and can quantify the industrial development potential of the shale oil in the target shale stratum.
Example two:
in order to better understand the shale oil industrial value evaluation method, the embodiment provides an application example for illustration.
In this embodiment, it is known that a certain high-frequency convolution thickness of the target shale layer system is 20.93m, lithology mainly includes 3 types of mixed shale, long-quartz shale and dolomitic shale, the section of shale is divided into 25 prosodic layers by a prosodic description method, the prosodic layers are respectively numbered as 1 and 2 · 25 from bottom to top, and abundance, brittleness index and flow index of movable hydrocarbons corresponding to each prosodic layer are shown in table 1.
TABLE 1
Specifically, the shale oil industry coefficient of the gyrating unit is calculated and evaluated through the following five steps.
(1) Oil content index IoAnd (4) calculating.
Mobile hydrocarbon abundance a:
the abundance A of the mobile hydrocarbon of the cyclic unit was calculated to be 2.76kg/t, satisfies the condition that A is more than or equal to 1 and less than 3, and the oil content index I in the convolution unitoComprises the following steps:
(2) fracturing index EfAnd (4) calculating.
The brittleness index B of the gyrotron cell was calculated:
the brittleness index B of the rotary unit satisfies the condition that B is more than or equal to 30 and less than 46.4, and the Mid is calculated1/4(bidi) Value 21.49, Mid3/4(bidi) Value 41.9, Avg (b)idi) A value of 37.07, the fracturing index E in the cyclic unitfComprises the following steps:
(3) flow index IfAnd (4) calculating.
Flow index I of this stagefComprises the following steps:
(4) and (4) calculating and evaluating an ESO (shale oil industry index).
The shale oil industrial coefficient ESO in the rotary unit is 0.75, has shale oil industrial development conditions, and belongs to II-type desserts.
(5) The industrial coefficient evaluation is performed on the 21 cyclic units in the target shale layer system by using the method, as shown in fig. 2, which is a schematic diagram of the evaluation result obtained by the evaluation according to the shale oil industrial value evaluation method in this embodiment, and as can be seen from fig. 2, 13 layers of type i dessert, 6 layers of type ii dessert, 1 layer of type iii dessert and 1 layer of invalid dessert segment are identified in the target shale layer.
And finally, selecting a 4 th small layer with shallow burial depth from the II-type dessert layers according to the evaluation results, designing horizontal well development aiming at the section of shale, and realizing industrialized production after fracturing, wherein the daily oil production of the well is stabilized at 23.4m at present3D, 1300m of daily output gas3And d, obtaining better effect.
Example three:
an embodiment of the present invention further provides a device for evaluating the industrial value of shale oil, as shown in fig. 3, which is a schematic structural diagram of the device, and as can be seen from fig. 3, the device includes a prosodic layer parameter obtaining module 31, a first calculation module 32 for a cyclic unit parameter, a second calculation module 33 for a cyclic unit parameter, a shale oil industrial coefficient calculation module 34, and an industrial value grade determination module 35, which are sequentially connected.
The prosodic layer parameter acquiring module 31 is configured to acquire a prosodic layer thickness, a mobile hydrocarbon abundance, a brittleness index and a flow index of each prosodic layer of a to-be-evaluated gyral unit in the target shale formation;
the first calculation module 32 for the parameter of the cyclic unit is used for calculating the abundance of the movable hydrocarbon, the brittleness index and the flow index of the cyclic unit to be evaluated according to the thickness of the cyclic layer, the abundance of the movable hydrocarbon, the brittleness index and the flow index of each cyclic layer;
the second calculation module 33 for the parameter of the cyclic unit is used for calculating the oil-containing index of the cyclic unit to be evaluated according to the abundance of the movable hydrocarbon of the cyclic unit to be evaluated, and calculating the fracture index of the cyclic unit to be evaluated according to the brittleness index of the cyclic unit to be evaluated;
the shale oil industry coefficient calculation module 34 is used for calculating the shale oil industry coefficient of the to-be-evaluated convolution unit according to the oil content index, the fracturing index and the flow index of the to-be-evaluated convolution unit;
and the industrialization value grade determining module 35 is used for determining the industrialization value grade of the to-be-evaluated convolution unit according to the shale oil industry coefficient.
The shale oil industrial value grade evaluation device provided by the invention firstly obtains the prosodic layer thickness, the abundance of movable hydrocarbon, the brittleness index and the flow index of each prosodic layer of a gyral unit to be evaluated in a target shale stratum; calculating the abundance, brittleness index and flow index of the movable hydrocarbon of the gyre unit to be evaluated according to the thickness, the abundance, the brittleness index and the flow index of the movable hydrocarbon of each prosodic layer; then, calculating the oil-containing index of the to-be-evaluated gyre unit according to the abundance of the movable hydrocarbon of the to-be-evaluated gyre unit, and calculating the fracturing index of the to-be-evaluated gyre unit according to the brittleness index of the to-be-evaluated gyre unit; then, calculating the shale oil industrial coefficient of the to-be-evaluated convolution unit according to the oil content index, the fracturing index and the flow index of the to-be-evaluated convolution unit; and evaluating the industrialization value of the gyre unit to be evaluated according to the shale oil industry coefficient. The device can improve the reliability of the shale oil industrial development evaluation result and can quantify the industrial development potential of the shale oil in the target shale stratum.
In one possible embodiment, the first calculation module 32 of the parameter of the cyclic unit is also configured to calculate the abundance of movable hydrocarbons of the cyclic unit to be evaluated according to the following formula:
wherein A is the abundance of the mobile hydrocarbon of the gyrocompartment to be evaluated, liAbundance of mobile hydrocarbons as the i-th prosodic layer, diIs the thickness of the prosodic layer of the ith prosodic layer, and n is the number of the prosodic layers of the gyrus unit to be evaluated.
In another possible embodiment, the second calculation module 33 for the parameter of the cyclic unit is further configured to calculate the oil content index of the cyclic unit to be evaluated according to the following formula:
in the formula IoThe oil index of the cyclic unit to be evaluated, and A is the abundance of the mobile hydrocarbon of the cyclic unit to be evaluated.
In another possible embodiment, the first calculation module 32 of the above-mentioned convolution element parameter is further configured to calculate the first calculation parameter according toThe brittleness index of the gyrotron unit to be evaluated is calculated by the following formula:
wherein B is the brittleness index of the gyrotron cell to be evaluated, BiIs the brittleness index of the i-th prosodic layer, diIs the thickness of the prosodic layer of the ith prosodic layer, and n is the number of the prosodic layers of the gyrus unit to be evaluated.
In another possible embodiment, the second calculation module 33 for the parameter of the cyclic unit is further configured to calculate the fracture index of the cyclic unit to be evaluated according to the following formula:
in the formula, EfIs the fracture index of the cyclic unit to be evaluated, B is the brittleness index of the cyclic unit to be evaluated, BiIs the brittleness index of the i-th prosodic layer, diThe sum of the average values of the n and the Avg is the rhythm layer thickness of the ith rhythm layer, n is the number of the rhythm layer of the gyrus unit to be evaluated, and Avg represents the average value; mid1/41/4 digits representing the fetch group; mid3/43/4 digits representing the fetch group; min represents taking the minimum value.
In another possible embodiment, the first calculation module 32 of the parameter of the cyclic unit is also configured to calculate the flow index of the cyclic unit to be evaluated according to the following formula:
in the formula IfFlow index of the gyrotron cell to be evaluated, piIs the flow index of the i-th prosodic layer, diIs the thickness of the prosodic layer of the ith prosodic layer, and n is the number of the prosodic layers of the gyrus unit to be evaluated.
In another possible embodiment, the shale oil industry coefficient calculation module 34 is further configured to calculate the shale oil industry coefficient of the gyre unit to be evaluated according to the following formula:
in which ESO is the shale oil industry coefficient of the gyre unit to be evaluated, IoTo be evaluatedOil index of the oil recovery unit, EfFracturing index of the gyratory unit to be evaluated, IfThe flow index of the gyrotron cell to be evaluated.
In another possible embodiment, the industrialization value level determination module 35 is further configured to: if the ESO is more than or equal to 0.8, dividing the gyrus unit to be evaluated into type I desserts; if the ESO is more than or equal to 0.6 and less than 0.8, dividing the gyrus unit to be evaluated into II desserts; if the ESO is more than or equal to 0.4 and less than 0.6, dividing the gyrus unit to be evaluated into a type III dessert; if ESO is less than 0.4, the cyclic unit to be evaluated is divided into cyclic units without industrial exploitation value.
The implementation principle and the generated technical effect of the device for evaluating the shale oil industrial value grade provided by the embodiment of the invention are the same as those of the embodiment of the method for evaluating the shale oil industrial value grade, and for the sake of brief description, corresponding contents in the embodiment of the method for evaluating the shale oil industrial value grade can be referred to where the embodiment of the device for evaluating the shale oil industrial value grade is not mentioned.
Example four:
an embodiment of the present invention further provides an electronic device, as shown in fig. 4, which is a schematic structural diagram of the electronic device, where the electronic device includes a processor 41 and a memory 40, the memory 40 stores computer-executable instructions that can be executed by the processor 41, and the processor 41 executes the computer-executable instructions to implement the shale oil industrial value grade evaluation method.
In the embodiment shown in fig. 4, the electronic device further comprises a bus 42 and a communication interface 43, wherein the processor 41, the communication interface 43 and the memory 40 are connected by the bus 42.
The Memory 40 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 43 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, etc. may be used. The bus 42 may be an ISA bus, PCI bus, EISA bus, or the like. The bus 42 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 4, but that does not indicate only one bus or one type of bus.
The processor 41 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 41. The Processor 41 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and the processor 41 reads information in the memory and completes the steps of the shale oil industry value grade evaluation method of the foregoing embodiment in combination with hardware thereof.
The embodiment of the invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions cause the processor to realize the shale oil industrial value grade evaluation method.
The shale oil industrial value grade evaluation method, the shale oil industrial value grade evaluation device and the computer program product of the electronic device provided by the embodiment of the invention comprise a computer readable storage medium storing program codes, instructions included in the program codes can be used for executing the shale oil industrial value grade evaluation method in the previous method embodiment, and specific implementation can be referred to the method embodiment, and is not described herein again.
Unless specifically stated otherwise, the relative steps, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present invention.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. A shale oil industrial value grade evaluation method is characterized by comprising the following steps:
obtaining the prosodic layer thickness, the abundance of movable hydrocarbon, the brittleness index and the flow index of each prosodic layer of a gyrus unit to be evaluated in a target shale stratum;
calculating the abundance, brittleness index and flow index of the movable hydrocarbon of the gyre unit to be evaluated according to the thickness, the abundance, the brittleness index and the flow index of the movable hydrocarbon of each prosodic layer;
calculating the oil-containing index of the cyclic unit to be evaluated according to the abundance of the movable hydrocarbon of the cyclic unit to be evaluated, and calculating the fracturing index of the cyclic unit to be evaluated according to the brittleness index of the cyclic unit to be evaluated;
the calculation formula for calculating the oil content index of the to-be-evaluated convolution unit is as follows:
in the formula IoThe oil content index of the cyclic unit to be evaluated, and A is the abundance of the movable hydrocarbon of the cyclic unit to be evaluated;
the calculation formula for calculating the fracturing index of the to-be-evaluated convolution unit is as follows:
in the formula, EfIs the fracture index of the cyclic unit to be evaluated, B is the brittleness index of the cyclic unit to be evaluated, BiIs the brittleness index of the i-th prosodic layer, diThe thickness of the prosodic layer of the ith prosodic layer is Avg, and the average value is taken; mid1/41/4 digits representing the fetch group; mid3/43/4 digits representing the fetch group; min represents taking the minimum value;
calculating the shale oil industrial coefficient of the to-be-evaluated convolution unit according to the oil content index, the fracturing index and the flow index of the to-be-evaluated convolution unit;
the calculation formula for calculating the shale oil industrial coefficient of the gyrus unit to be evaluated is as follows:
in which ESO is the shale oil industry coefficient of the gyre unit to be evaluated, IoOil index of the gyratory unit to be evaluated, EfFracturing index of the gyratory unit to be evaluated, IfThe flow index of the gyrotron unit to be evaluated;
and determining the industrial value grade of the gyrus unit to be evaluated according to the shale oil industrial coefficient.
2. The method according to claim 1, wherein the calculation formula for calculating the abundance of movable hydrocarbons of the cyclic unit to be evaluated from the prosodic layer thickness and the abundance of movable hydrocarbons of each prosodic layer is as follows:
wherein A is the abundance of the mobile hydrocarbon of the gyrocompartment to be evaluated, liAbundance of mobile hydrocarbons as the i-th prosodic layer, diIs the thickness of the prosodic layer of the ith prosodic layer, and n is the number of the prosodic layers of the gyrus unit to be evaluated.
3. The method according to claim 1, wherein the brittleness index of the gyral unit to be evaluated is calculated according to the thickness of the prosodic layer and the brittleness index of each prosodic layer by the following formula:
wherein B is the brittleness index of the gyrotron cell to be evaluated, BiIs the brittleness index of the i-th prosodic layer, diIs the thickness of the prosodic layer of the ith prosodic layer, and n is the number of the prosodic layers of the gyrus unit to be evaluated.
4. The method according to claim 1, wherein the formula for calculating the flow index of the convolution element to be evaluated according to the prosodic layer thickness and the flow index of each prosodic layer is as follows:
in the formula IfFlow index of the gyrotron cell to be evaluated, piIs the flow index of the i-th prosodic layer, diIs the thickness of the prosodic layer of the ith prosodic layer, and n is the number of the prosodic layers of the gyrus unit to be evaluated.
5. The method according to claim 1, wherein the step of determining the industrialization value grade of the cyclic unit to be evaluated according to the shale oil industry coefficient comprises:
if the ESO is more than or equal to 0.8, dividing the gyrus unit to be evaluated into type I desserts;
if the ESO is more than or equal to 0.6 and less than 0.8, dividing the gyrus unit to be evaluated into II desserts;
if the ESO is more than or equal to 0.4 and less than 0.6, dividing the gyrus unit to be evaluated into a type III dessert;
and if the ESO is less than 0.4, dividing the cyclic unit to be evaluated into cyclic units without industrial exploitation value.
6. A shale oil industry value grade evaluation device, characterized by comprising:
the system comprises a rhythm layer parameter acquisition module, a movable hydrocarbon abundance, a brittleness index and a flow index, wherein the rhythm layer parameter acquisition module is used for acquiring the rhythm layer thickness, the movable hydrocarbon abundance, the brittleness index and the flow index of each rhythm layer of a to-be-evaluated gyrus unit in a target shale stratum;
the first calculation module of the parameter of the convolution unit is used for calculating the abundance of the movable hydrocarbon, the brittleness index and the flow index of the convolution unit to be evaluated according to the thickness of the prosody layer, the abundance of the movable hydrocarbon, the brittleness index and the flow index of each prosody layer;
the second calculation module of the cycle unit parameters is used for calculating the oil-containing index of the cycle unit to be evaluated according to the abundance of the movable hydrocarbon of the cycle unit to be evaluated and calculating the fracturing index of the cycle unit to be evaluated according to the brittleness index of the cycle unit to be evaluated;
the calculation formula for calculating the oil content index of the to-be-evaluated convolution unit is as follows:
in the formula IoThe oil content index of the cyclic unit to be evaluated, and A is the abundance of the movable hydrocarbon of the cyclic unit to be evaluated;
the calculation formula for calculating the fracturing index of the to-be-evaluated convolution unit is as follows:
in the formula, EfIs the fracture index of the cyclic unit to be evaluated, B is the brittleness index of the cyclic unit to be evaluated, BiIs the brittleness index of the i-th prosodic layer, diThe thickness of the prosodic layer of the ith prosodic layer is Avg, and the average value is taken; mid1/41/4 digits representing the fetch group; mid3/43/4 digits representing the fetch group; min represents taking the minimum value;
the shale oil industry coefficient calculation module is used for calculating the shale oil industry coefficient of the to-be-evaluated convolution unit according to the oil content index, the fracturing index and the flow index of the to-be-evaluated convolution unit;
the calculation formula for calculating the shale oil industrial coefficient of the gyrus unit to be evaluated is as follows:
in which ESO is the shale oil industry coefficient of the gyre unit to be evaluated, IoOil index of the gyratory unit to be evaluated, EfFracturing index of the gyratory unit to be evaluated, IfThe flow index of the gyrotron unit to be evaluated;
and the industrialization value grade determining module is used for determining the industrialization value grade of the to-be-evaluated convolution unit according to the shale oil industry coefficient.
7. An electronic device comprising a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement the shale oil industry value grade evaluation method of any of claims 1 to 5.
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