CN107038327B - Method and device for determining multi-purpose layer trap geological resource amount - Google Patents
Method and device for determining multi-purpose layer trap geological resource amount Download PDFInfo
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Abstract
The invention provides a method and a device for determining the quantity of multi-purpose stratigraphic trap geological resources, wherein the method comprises the following steps: calculating the hydrocarbon-containing probability of the multi-purpose trap with at least one target trap successfully explored according to the geological correlation among the target traps; acquiring the trap geological resource amount after the multi-purpose layer trap risk based on a risk analysis technology; and calculating to obtain the trap geological resource amount of the multi-target stratum according to the oil-gas containing probability of the multi-target stratum trap and the trapped geological resource amount after risk. The method takes the geological correlation among the target layer traps into consideration, objectively and reasonably reflects the uncertainty characteristic of underground resources, can provide multi-target layer trap geological resource amount which is more in line with the actual situation, and further lays a solid foundation for exploration planning and investment decision.
Description
Technical Field
The invention relates to the technical field of oil-gas exploration, in particular to a method and a device for determining the geological resource quantity of multi-purpose layer trap.
Background
The estimation of the trap geological resource amount is a main task for carrying out the potential evaluation of the drilling target, although the volume of oil gas contained in the trap is objective, the estimation is limited by the prior art and economic conditions, the exploration stage cannot directly measure and obtain the accurate volume of the oil gas, the trap related geological parameters can be obtained only by an indirect means, and the trap geological resource amount is estimated. Therefore, reasonably selecting a calculation method, objectively and quantitatively evaluating the oil-gas-containing scale of trap is the core of the estimation of the trap resource amount.
The volume method is a common method for calculating the trap geological resource amount, and comprises a determination method and a probability method. The mathematical formula is Q ═ A × Ca × Hf × SNF, A is the trap area, Ca is the oil (or gas) containing area coefficient, Hf is the effective thickness of the oil (or gas) layer, and SNF is the single storage coefficient. However, the method is only suitable for calculating the trap geological resource amount of a single-purpose layer, and for calculating the trap geological resource amount of a multi-purpose layer, the currently adopted calculation method is as follows: firstly, calculating the geological resource amount of each target layer trap according to a volumetric method, and then taking the sum of the calculated geological resource amounts of each target layer trap as the multi-target layer trap geological resource amount. The calculation method only reflects the optimistic exploration condition, namely the trap geological resource quantity of the multiple target layers under the condition that each target layer trap is successful, the trap geological risk of each target layer and the geological relationship between the target layers are not considered, so that the too-high estimation of the trap geological resource quantity of the multiple target layers generally exists, the difference from the actual condition is caused, and the exploration plan making and the exploration investment decision are directly influenced. From the current domestic research technical level, a unified calculation method with strong operability and high precision is not formed for calculating the multi-purpose stratigraphic trap geological resource amount.
Disclosure of Invention
The invention provides a method and a device for determining the quantity of multi-purpose stratigraphic trap geological resources, which are used for solving the technical problem that the method in the prior art cannot accurately obtain the quantity of the multi-purpose stratigraphic trap geological resources.
The invention provides a method for determining the quantity of multi-purpose stratigraphic trap geological resources on one hand, which comprises the following steps:
102, acquiring trap geological resource amount after multi-purpose layer trap risk based on a risk analysis technology;
and 103, calculating to obtain the trap geological resource amount of the multi-target stratum according to the gas-containing probability of the multi-target stratum trap and the trapped geological resource amount after risk.
Further, step 101 specifically includes:
dividing geological correlation relations among all the target layer traps into three categories, namely, no geological correlation of all the target layer traps, partial geological correlation of all the target layer traps and complete geological correlation of all the target layer traps;
respectively calculating the hydrocarbon containing probability of the multi-purpose trap with at least one target trap successfully exploited according to the geological correlation among the three types of target traps;
wherein, for traps with n target layers, the oil and gas containing probability of each target layer trap is P1，P2，…，PnWhen the traps of all the target layers are not geologically related, the oil-gas containing probability of the traps of the multi-target layers is as follows:
the probability of the oil gas contained in the trap of each target layer when the traps of the target layers are in geological correlation is as follows:
Pdepprobability of correlation factor, P, for each destination layer trapindep,iProbability of uncorrelated factors for each destination layer trap;
the probability of the oil gas contained in the multi-purpose stratigraphic trap when the stratigraphic traps of all purposes are completely geologically related is as follows:
P＝P1＝P2＝…＝Pn。
further, step 102 specifically includes:
acquiring the trap geological resource quantity of each target layer, wherein the quantities are Q1，Q2，…，QnN is the number of target layers of a trap;
obtaining the oil and gas containing probability of each target layer trap, wherein the probability is P1，P2，…，Pn；
Calculating to obtain the risky trap geological resource amount according to the trap geological resource amount of each target layer and the trap hydrocarbon-containing probability of each target layer, wherein the risky trap geological resource amount calculation formula is as follows:
further, step 103 specifically includes:
according to the formula Q ═ QAfter riskthe/P calculation obtains the trap geological resource amount of a multi-purpose layer, wherein QAfter riskAnd P is the hydrocarbon-containing probability of the multi-purpose stratigraphic trap, which is the amount of the geological resources of the trapped geological after risk.
Further, the volume method is used for calculating the trap geological resource amount of each target layer.
Another aspect of the present invention provides a device for determining the amount of geological resources of a multi-purpose stratigraphic trap, including:
the acquisition module of the hydrocarbon-containing probability of the multi-purpose trap is used for calculating the hydrocarbon-containing probability of the multi-purpose trap with at least one target trap which is successfully explored according to the geological correlation among the target traps;
the post-risk trap geological resource amount acquisition module is used for acquiring multi-purpose post-layer trap geological resource amount based on a risk analysis technology;
and the multi-purpose layer trap geological resource quantity acquisition module is used for calculating and acquiring the multi-purpose layer trap geological resource quantity according to the multi-purpose layer trap hydrocarbon-containing probability and the risk trap geological resource quantity.
Further, the multi-purpose stratum trap hydrocarbon-containing probability obtaining module specifically includes:
the classification submodule is used for dividing geological correlation relations among all target layer traps into three classes, namely, no geological correlation of all target layer traps, partial geological correlation of all target layer traps and complete geological correlation of all target layer traps;
the multi-purpose layer trap hydrocarbon-containing probability calculation submodule is used for respectively calculating the hydrocarbon-containing probability of at least one multi-purpose layer trap successfully exploited by the target layer trap according to the geological correlation among the three types of the target layer traps,
wherein, for traps with n target layers, the oil and gas containing probability of each target layer trap is P1，P2，…，PnWhen the traps of all the target layers are not geologically related, the oil-gas containing probability of the traps of the multi-target layers is as follows:
the probability of the oil gas contained in the trap of each target layer when the traps of the target layers are in geological correlation is as follows:
Pdepprobability of correlation factor, P, for each destination layer trapindep,iProbability of uncorrelated factors for each destination layer trap;
the probability of the oil gas contained in the multi-purpose stratigraphic trap when the stratigraphic traps of all purposes are completely geologically related is as follows:
P＝P1＝P2＝…＝Pn。
further, the module for acquiring the quantity of the trapped geological resources after the risk specifically comprises:
each target layer trap geological resource quantity obtaining submodule is used for obtaining each target layer trap geological resource quantity which is Q1，Q2，…，QnWherein n is the number of target layers of a trap;
each target layer trap hydrocarbon-containing probability obtaining submodule for obtaining each target layer trap hydrocarbon-containing probability, which is P1，P2，…，Pn；
And the post-risk entrapment geological resource metering operator module is used for calculating and obtaining the post-risk entrapment geological resource amount according to the entrapment geological resource amount of each target layer and the entrapment oil-gas containing probability of each target layer, wherein the post-risk entrapment geological resource amount calculation formula is as follows:
further, the multi-purpose stratigraphic trap geological resource quantity obtaining module is specifically configured to:
according to the formula Q ═ QAfter riskthe/P calculation obtains the trap geological resource amount of a multi-purpose layer, wherein QAfter riskAnd P is the hydrocarbon-containing probability of the multi-purpose stratigraphic trap, which is the amount of the geological resources of the trapped geological after risk.
The method and the device for determining the geological resource amount of the multi-purpose trap are used for the condition that one trap comprises a plurality of purpose trap layers, firstly, according to the geological correlation relationship between all target layer traps, the hydrocarbon-containing probability of multi-target layer traps with at least one target layer trap exploration success is calculated, then acquiring the trap geological resource amount after the risk of the multi-purpose layer trap on the basis of a risk analysis technology, finally calculating the acquired trap geological resource amount of the multi-purpose layer according to the hydrocarbon-containing probability of the multi-purpose layer trap and the trap geological resource amount after the risk, the method takes the geological correlation among the target layer traps into consideration, objectively and reasonably reflects the uncertainty characteristic of underground resources, can provide multi-target layer trap geological resource amount which is more in line with the actual situation, and further lays a solid foundation for exploration planning and investment decision.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 is a schematic flow chart of a method for determining the volume of geologic resources for trapping a multi-destination layer according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for determining the volume of geologic resources for trapping a multi-destination layer according to a second embodiment of the present invention;
FIG. 3 is a diagram illustrating a comparison of the volume of geologic resources trapped in a multi-purpose layer according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a multi-destination trap geological resource amount determination device according to a third embodiment of the invention;
fig. 5 is a schematic structural diagram of a multi-destination trap geological resource amount determination device according to a fourth embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
Example one
Fig. 1 is a schematic flow chart of a method for determining a quantity of multi-purpose stratigraphic trap geological resources according to an embodiment of the present invention, and as shown in fig. 1, the present invention provides a method for determining a quantity of multi-purpose stratigraphic trap geological resources, including:
Specifically, one trap comprises a plurality of target layers, and on the basis of considering the trap risk of each target layer, the geological correlation relationship among the traps of each target layer is analyzed, wherein the geological correlation relationship among the traps of each target layer comprises three conditions of no geological correlation, partial geological correlation and complete geological correlation of the traps of each target layer, and the probability of at least one trap of the target layer when the exploitation is successful is calculated for the three conditions respectively and is used as the hydrocarbon-containing probability of the traps of the plurality of target layers, namely the hydrocarbon-containing probability and the geological resource content of the traps of each target layer are considered, and the geological correlation of each target layer is considered. The calculation method objectively and reasonably reflects the uncertainty characteristic of underground resources, can provide multi-purpose stratigraphic trap geological resource amount which is more in line with actual conditions, and further lays a solid foundation for exploration planning and investment decision.
And 102, acquiring the trap geological resource amount after the multi-purpose layer trap risk based on a risk analysis technology.
In particular, risk generally refers to the loss of actual results with a large deviation from prior estimates due to the influence of some factors that cannot be controlled. And risk analysis is carried out, so that the influence degree of the change of the relevant factors on the decision is favorably determined, and the estimation result can be closer to a true value by carrying out the risk analysis. Therefore, the multi-purpose layer trap risk is analyzed, the trap geological resource amount after the multi-purpose layer trap risk is obtained, and the risk is taken into consideration, so that the trap geological resource amount after the risk is more consistent with the real situation.
There is no strict sequence between the steps 101 and 102, and the sequence can be selected according to actual situations.
And 103, calculating to obtain the trap geological resource amount of the multi-target stratum according to the gas-containing probability of the multi-target stratum trap and the trapped geological resource amount after risk.
Specifically, the multi-purpose layer trap geological resource amount obtained in the step considers the geological correlation among the target layer traps and takes the risk analysis into consideration, so that the multi-purpose layer trap geological resource amount is closer to a true value.
The method for determining the geological resource amount of the multi-purpose stratigraphic trap provided by the embodiment is used for the condition that one trap comprises a plurality of objective stratigraphic traps, firstly, according to the geological correlation relationship between all target layer traps, the hydrocarbon-containing probability of multi-target layer traps with at least one target layer trap exploration success is calculated, then acquiring the trap geological resource amount after the risk of the multi-purpose layer trap on the basis of a risk analysis technology, finally calculating the acquired trap geological resource amount of the multi-purpose layer according to the hydrocarbon-containing probability of the multi-purpose layer trap and the trap geological resource amount after the risk, the method takes the geological correlation among the target layer traps into consideration, objectively and reasonably reflects the uncertainty characteristic of underground resources, can provide multi-target layer trap geological resource amount which is more in line with the actual situation, and further lays a solid foundation for exploration planning and investment decision.
Example two
This embodiment is a supplementary explanation based on the above embodiment.
Fig. 2 is a schematic flow chart of a method for determining a quantity of multi-purpose stratigraphic trap geological resources according to a second embodiment of the present invention, and as shown in fig. 2, the present invention provides a method for determining a quantity of multi-purpose stratigraphic trap geological resources, including:
Specifically, the geological correlation between the traps of the target layers can be divided into three categories, namely no geological correlation of the traps of the target layers, partial geological correlation of the traps of the target layers and complete geological correlation of the traps of the target layers. The non-geological correlation means that all target layer traps are mutually independent on an oil-gas reservoir system, for example, the target layer trap A, B is completely independent on the aspects of trap, reservoir, filling, storage and the like, and all the systems are formed, namely, the drilling result of the target layer trap A has no influence on the drilling result of the target layer trap B. The partial geological correlation means that partial correlation dependencies exist on a hydrocarbon reservoir system by a plurality of target layer traps, for example, the target layer trap A, B has interdependencies in the aspects of source rocks, migration and the like, and is independent from each other in the aspects of reservoir and storage, and at the moment, the target layer trap A, B is regarded as the partial correlation dependencies exist on the hydrocarbon reservoir system. By fully geologically related, it is meant that multiple target layer traps are fully dependent on the hydrocarbon reservoir system, such as target layer trap A, B having identical trap, reservoir, fill, and hold reservoir elements, which typically means that if target layer trap a is successfully drilled then target layer trap B is successfully drilled, and if target layer trap a is not successfully drilled then target layer trap B is not drilled.
wherein, for traps with n target layers, the oil and gas containing probability of each target layer trap is P1，P2，…，PnWhen the traps of all the target layers are not geologically related, the oil-gas containing probability of the traps of the multi-target layers is as follows:
the probability of the oil gas contained in the trap of each target layer when the traps of the target layers are in geological correlation is as follows:
Pdepprobability of correlation factor, P, for each destination layer trapindep,iProbability of uncorrelated factors for each destination layer trap;
the probability of the oil gas contained in the multi-purpose stratigraphic trap when the stratigraphic traps of all purposes are completely geologically related is as follows:
P＝P1＝P2＝…＝Pn。
specifically, for the geological correlation relations among the three types of target layer traps, the hydrocarbon-containing probabilities of at least one target layer trap which is successfully exploited by the target layer trap are respectively calculated, wherein the hydrocarbon-containing probabilities of the target layer traps are the same when the target layer traps are completely correlated.
further, the volume method is used for calculating the trap geological resource amount of each target layer.
For traps having n target layers, the amount of geological resources of each target layer trap is calculated, and preferably, the amount of geological resources is calculated by a volumetric method.
And 1023, calculating the trapped geological resource amount after risk according to the trapped geological resource amount of each target layer and the oil-gas containing probability of each target layer, wherein the calculation formula of the trapped geological resource amount after risk is as follows:
and 103, calculating to obtain the trap geological resource amount of the multi-target stratum according to the gas-containing probability of the multi-target stratum trap and the trapped geological resource amount after risk.
Further, according to the formula Q ═ QAfter riskthe/P calculation obtains the trap geological resource amount of a multi-purpose layer, wherein QAfter riskAnd P is the hydrocarbon-containing probability of the multi-purpose stratigraphic trap, which is the amount of the geological resources of the trapped geological after risk.
Specifically, the formula is based on risk analysis, and meanwhile, the correlation of multi-purpose layer trap is considered, so that the estimation result is closer to a true value.
As shown in fig. 3, the geological correlation relationship between the traps of the target layers gradually increases, and the geological resource amount of the traps of the multi-purpose layers also gradually increases as can be seen from fig. 3. The method comprises the steps of acquiring a geological data of a geological data, and acquiring a geological data of a geological data, wherein the geological data comprises a plurality of geological data, a plurality of geological.
The method for determining the amount of the geological resource of the multi-purpose trap, provided by the embodiment, is used for the situation that one trap comprises a plurality of target traps, the geological correlation among the target traps is divided into three types, the hydrocarbon-containing probability of the multi-purpose trap with at least one target trap which is successfully explored is calculated for three different types of geological correlation, then the trap geological resource amount after the risk of the multi-purpose trap is obtained on the basis of a risk analysis technology, and finally the trap geological resource amount of the multi-purpose trap is calculated and obtained according to the hydrocarbon-containing probability of the multi-purpose trap and the hydrocarbon-containing geological resource amount after the risk, because the geological correlation among the target traps is considered, the method objectively and reasonably embodies the characteristics of underground resources, and can provide the multi-purpose trap geological resource amount of the trap which is more in line with the actual situation, and further lays a solid foundation for exploration planning and investment decision.
The following describes the superiority of the method for determining the amount of multi-purpose stratigraphic trap geological resources according to the present invention with reference to specific examples.
In order to illustrate the application effect of the method in calculating the trap geological resource amount of the multi-purpose layer, a lithologic trap under the sand-dropping disk of the east-Yingjiang West fault is taken as an example, the trap consists of two purpose layers Es4-1 and Es4-2, the probability Pg (A-1) of oil and gas in the purpose layer Es4-1 is 0.27, and the trap geological resource amount is 99 multiplied by 104t; target layer Es4-2 has a hydrocarbon probability Pg (A-2) of 0.14, and trap geological resource amount is 702 x 104t; the petroleum geology research and analysis result shows that the two objective layer traps Es4-1 and Es4-2 have no geological correlation, namely the two objective layer traps Es4-1 and Es4-2 are completely independent in the aspects of trap, reservoir, filling, storage and the like, the probability Pg of the success of at least one objective layer is calculated to be 0.37 according to the geological correlation, the geological resource content of the multi-objective layer trap is divided by the sum of the geological resource contents after the risks of the objective layers, namely Q is [ (0.27 x 99) + (0.14 x 702)]÷0.37＝337.8×104t. According to the conventional method for calculating the trap geological resource amount of the multi-purpose layer, the trap geological resource amount of the multi-purpose layer is 801 multiplied by 104t, i.e., Q, 99+ 702. By comparing with the actual proven reserves, the multi-purpose stratigraphic trap geological resource amount (337.8 multiplied by 10) calculated by the invention can be seen4t) and ascertained reserves (201X 10)4And the error between t) is relatively small and is closer to geological objective reality, and specific data are shown in a table 1.
TABLE 1
EXAMPLE III
The present embodiment is an apparatus embodiment, and is configured to perform the method in the first embodiment.
Fig. 4 is a schematic structural diagram of a device for determining an amount of multi-purpose stratigraphic trap geological resources according to a third embodiment of the present invention, and as shown in fig. 4, the present invention provides a device for determining an amount of multi-purpose stratigraphic trap geological resources, including: a multi-purpose stratigraphic trap hydrocarbon-containing probability obtaining module 201, a post-risk trap geological resource amount obtaining module 202 and a multi-purpose stratigraphic trap geological resource amount obtaining module 203.
The acquisition module 201 is used for calculating the hydrocarbon-containing probability of the multi-purpose stratigraphic trap, which has at least one successful target stratigraphic trap exploration, according to the geological correlation among the target stratigraphic traps;
a post-risk trap geological resource amount obtaining module 202, configured to obtain multi-purpose trap geological resource amounts after the risk of layer trapping based on a risk analysis technique;
and the multi-destination layer trap geological resource amount acquisition module 203 is used for calculating and acquiring the multi-destination layer trap geological resource amount according to the gas containing probability of the multi-destination layer trap and the risk trap geological resource amount.
The present embodiment is an embodiment of the apparatus of the first embodiment, and specific reference may be made to the description of the first embodiment, which is not repeated herein.
The method for determining the amount of the multi-purpose stratigraphic trap geological resource provided by the embodiment is used for the situation that one trap comprises a plurality of target stratigraphic traps, firstly, the multi-purpose stratigraphic trap hydrocarbon-containing probability obtaining module 201 calculates the hydrocarbon-containing probability of the multi-purpose stratigraphic trap with at least one target stratigraphic trap exploration success according to the geological correlation among the target stratigraphic traps, then the at-risk trap geological resource amount obtaining module 202 obtains the at-risk stratigraphic trap geological resource amount of the multi-purpose stratigraphic trap on the basis of the risk analysis technology, and finally, the multi-purpose stratigraphic trap geological resource amount obtaining module 203 calculates the multi-purpose stratigraphic trap hydrocarbon-containing probability and the at-risk trap geological resource amount according to the multi-purpose stratigraphic trap hydrocarbon-containing probability and the at-risk trap geological resource amount, and the device objectively and reasonably embodies the uncertainty characteristics of underground resources due to the consideration of the geological correlation among the target stratigraphic traps, the method can provide multi-purpose stratigraphic trap geological resource amount which is more in line with actual conditions, and further lays a solid foundation for exploration planning and investment decision.
Example four
The present embodiment is a supplementary description performed on the basis of the third embodiment, and is an embodiment of an apparatus for performing the method in the second embodiment.
Fig. 5 is a schematic structural diagram of a device for determining an amount of multi-purpose stratigraphic trap geological resources according to a fourth embodiment of the present invention, and as shown in fig. 5, the present invention provides a device for determining an amount of multi-purpose stratigraphic trap geological resources, including: a multi-purpose stratigraphic trap hydrocarbon-containing probability obtaining module 201, a post-risk trap geological resource amount obtaining module 202 and a multi-purpose stratigraphic trap geological resource amount obtaining module 203.
Further, the multi-purpose stratigraphic trap hydrocarbon-containing probability obtaining module 201 specifically includes a classification submodule 2011 and a multi-purpose stratigraphic trap hydrocarbon-containing probability calculating submodule 2012.
The classification submodule 2011 is configured to classify geological correlation relationships among the target layer traps into three categories, namely no geological correlation of the target layer traps, partial geological correlation of the target layer traps and complete geological correlation of the target layer traps;
the multi-purpose stratigraphic trap hydrocarbon-containing probability calculation submodule 2012 is used for calculating the hydrocarbon-containing probability of at least one multi-purpose stratigraphic trap successfully exploited according to the geological correlation among the three kinds of stratigraphic traps,
wherein, for traps with n target layers, the oil and gas containing probability of each target layer trap is P1，P2，…，PnWhen the traps of all the target layers are not geologically related, the oil-gas containing probability of the traps of the multi-target layers is as follows:
the probability of the oil gas contained in the trap of each target layer when the traps of the target layers are in geological correlation is as follows:
Pdepprobability of correlation factor, P, for each destination layer trapindep,iFor each purpose layerA correlation factor probability;
the probability of the oil gas contained in the multi-purpose stratigraphic trap when the stratigraphic traps of all purposes are completely geologically related is as follows:
P＝P1＝P2＝…＝Pn。
further, the post-risk trap geological resource amount obtaining module 202 specifically includes a trap geological resource amount obtaining submodule 2021 for each destination layer, a trap gas-containing probability obtaining submodule 2022 for each destination layer, and a post-risk trap geological resource amount calculating operator module 2023.
Wherein, the acquisition submodule 2021 of the trap geological resource amount of each destination layer is used for acquiring the trap geological resource amount of each destination layer, which is Q respectively1，Q2，…，QnWherein n is the number of target layers of a trap;
the hydrocarbon-containing probability obtaining submodule 2022 for obtaining hydrocarbon-containing probability of each target layer trap, which is P1，P2，…，Pn；
The post-risk entrapment geological resource amount calculation operator module 2023 is configured to calculate and obtain a post-risk entrapment geological resource amount according to the entrapment geological resource amount of each target layer and the entrapment hydrocarbon-containing probability of each target layer, where the post-risk entrapment geological resource amount calculation formula is:
further, the multi-purpose stratigraphic trap geological resource amount obtaining module 203 is specifically configured to:
according to the formula Q ═ QAfter riskthe/P calculation obtains the trap geological resource amount of a multi-purpose layer, wherein QAfter riskAnd P is the hydrocarbon-containing probability of the multi-purpose stratigraphic trap, which is the amount of the geological resources of the trapped geological after risk.
The present embodiment is an embodiment of the apparatus of the second embodiment, and specific reference may be made to the description of the second embodiment, which is not repeated herein.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (5)
1. A method for determining the quantity of geological resources for multi-purpose stratigraphic trap is characterized by comprising the following steps:
step 101, calculating the hydrocarbon-containing probability of a multi-purpose trap with at least one target trap successfully explored according to the geological correlation among the target traps;
102, acquiring the trap geological resource amount after the multi-purpose layer trap risk based on a risk analysis technology, and specifically comprising the following steps:
acquiring the trap geological resource quantity of each target layer, wherein the quantities are Q1，Q2，…，QnN is the number of target layers of a trap;
obtaining the oil and gas containing probability of each target layer trap, wherein the probability is P1，P2，…，Pn；
Calculating to obtain the risky trap geological resource amount according to the trap geological resource amount of each target layer and the trap hydrocarbon-containing probability of each target layer, wherein the risky trap geological resource amount calculation formula is as follows:
103, calculating to obtain the trapping geological resource amount of the multi-target stratum according to the trapping geological resource amount after the hydrocarbon-containing probability and the risk of the multi-target stratum, which specifically comprises the following steps:
according to the formula Q ═ QAfter riskthe/P calculation obtains the trap geological resource amount of a multi-purpose layer, wherein QAfter riskP is the probability of success of the trap exploration of at least one target layer, which is the amount of the trapped geological resources after risk.
2. The method for determining the volume of the geological resources for the multi-purpose stratigraphic trap according to claim 1, wherein the step 101 specifically comprises:
dividing geological correlation relations among all the target layer traps into three categories, namely, no geological correlation of all the target layer traps, partial geological correlation of all the target layer traps and complete geological correlation of all the target layer traps;
respectively calculating the hydrocarbon containing probability of the multi-purpose trap with at least one target trap successfully exploited according to the geological correlation among the three types of target traps;
wherein, for traps with n target layers, the oil and gas containing probability of each target layer trap is P1，P2，…，PnWhen the traps of all the target layers are not geologically related, the oil-gas containing probability of the traps of the multi-target layers is as follows:
the probability of the oil gas contained in the trap of each target layer when the traps of the target layers are in geological correlation is as follows:
Pdepprobability of correlation factor, P, for each destination layer trapindep,iProbability of uncorrelated factors for each destination layer trap;
the probability of the oil gas contained in the multi-purpose stratigraphic trap when the stratigraphic traps of all purposes are completely geologically related is as follows:
P＝P1＝P2＝…＝Pn。
3. the method according to claim 1, wherein the volume of the geological resources for each target layer trap is calculated by a volume method.
4. A multi-purpose stratigraphic confinement geological resource quantity determination apparatus, comprising:
the acquisition module of the hydrocarbon-containing probability of the multi-purpose trap is used for calculating the hydrocarbon-containing probability of the multi-purpose trap with at least one target trap which is successfully explored according to the geological correlation among the target traps;
the post-risk trap geological resource amount acquisition module is used for acquiring the multi-purpose trap geological resource amount after the layer trap risk based on a risk analysis technology, and specifically comprises the following steps:
each target layer trap geological resource quantity obtaining submodule is used for obtaining each target layer trap geological resource quantity which is Q1，Q2，…，QnWherein n is the number of target layers of a trap;
each target layer trap hydrocarbon-containing probability obtaining submodule for obtaining each target layer trap hydrocarbon-containing probability, which is P1，P2，…，Pn；
And the post-risk entrapment geological resource metering operator module is used for calculating and obtaining the post-risk entrapment geological resource amount according to the entrapment geological resource amount of each target layer and the entrapment oil-gas containing probability of each target layer, wherein the post-risk entrapment geological resource amount calculation formula is as follows:
the multi-purpose layer trap geological resource amount obtaining module is used for calculating and obtaining a multi-purpose layer trap geological resource amount according to the multi-purpose layer trap hydrocarbon-containing probability and the risk trap geological resource amount, and specifically comprises the following steps:
according to the formula Q ═ QAfter riskthe/P calculation obtains the trap geological resource amount of a multi-purpose layer, wherein QAfter riskP is the probability of success of the trap exploration of at least one target layer, which is the amount of the trapped geological resources after risk.
5. The apparatus for determining the geological resource content of the multi-purpose stratigraphic trap according to claim 4, wherein the multi-purpose stratigraphic trap hydrocarbon-containing probability obtaining module specifically comprises:
the classification submodule is used for dividing geological correlation relations among all target layer traps into three classes, namely, no geological correlation of all target layer traps, partial geological correlation of all target layer traps and complete geological correlation of all target layer traps;
the multi-purpose layer trap hydrocarbon-containing probability calculation submodule is used for respectively calculating the hydrocarbon-containing probability of at least one multi-purpose layer trap successfully exploited by the target layer trap according to the geological correlation among the three types of the target layer traps,
wherein, for traps with n target layers, the oil and gas containing probability of each target layer trap is P1，P2，…，PnWhen the traps of all the target layers are not geologically related, the oil-gas containing probability of the traps of the multi-target layers is as follows:
the probability of the oil gas contained in the trap of each target layer when the traps of the target layers are in geological correlation is as follows:
Pdepprobability of correlation factor, P, for each destination layer trapindep,iProbability of uncorrelated factors for each destination layer trap;
the probability of the oil gas contained in the multi-purpose stratigraphic trap when the stratigraphic traps of all purposes are completely geologically related is as follows:
P＝P1＝P2＝…＝Pn。
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