CN-121995485-A - Method, medium and equipment for evaluating hidden potential of broken block trap

CN121995485ACN 121995485 ACN121995485 ACN 121995485ACN-121995485-A

Abstract

The embodiment of the application provides a method, medium and equipment for evaluating the hidden potential of a broken block trap, wherein the method comprises the steps of obtaining geological parameters of a target layer of the broken block trap; classifying faults corresponding to the target layer, normalizing geological parameters based on classification results of the faults in corresponding fault block trapping to obtain standard geological parameters, calculating standard fault parameters of a conducting fault, determining a conducting capacity index, calculating standard fault parameters of a shielding fault, determining a shielding capacity index, calculating standard trapping parameters of the fault block trapping, determining a trapping aggregation index, determining a hiding potential index of the target layer according to the conducting capacity index, the shielding capacity index and the trapping aggregation index, and sequencing the fault block trapping according to the hiding potential indexes of all the target layers of each fault block trapping to obtain a sequencing result of the hiding potential of the fault block trapping. The accurate evaluation of the hidden potential of the broken block trap is realized by the quantitative evaluation method.

Inventors

YU CHENGLIN
LI BIN
YANG LI
HUANG PENG
LI LIANG
XU BO
Gong Faxiong
YU ZHONGLIANG
LI XIAOGE
QU LILI
XUE XUE
ZHANG JUAN
Huo Yanda

Assignees

中国石油天然气股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260109

Claims (10)

1. A method for evaluating the potential of a broken block trap for hiding, the method comprising: Obtaining geological parameters of a target layer of the interrupted block trap of the target work area, wherein the geological parameters comprise trap parameters and fault parameters of all faults corresponding to the target layer; according to the function of each fault corresponding to the target layer for oil gas migration in the fault block trap, classifying each fault corresponding to the target layer, and obtaining a classification result of each fault in the corresponding fault block trap; based on classification results of all faults in corresponding fault block trap, standardizing geological parameters of a target layer to obtain standard geological parameters of the target layer, wherein the standard geological parameters comprise standard trap parameters and standard fault parameters of all faults corresponding to the target layer; calculating standard fault parameters of a target conducting fault, and determining a conducting capability index of the target conducting fault, wherein the target conducting fault is a conducting fault corresponding to a target layer of a fault block trap; calculating standard fault parameters of a target shielding fault, and determining a shielding capacity index of the target shielding fault, wherein the target shielding fault is a shielding fault corresponding to a target layer trapped by a fault block; calculating standard trap parameters corresponding to the target layer of the block trap, and determining trap aggregation indexes of the target layer of the block trap; Determining a hiding potential index of the target layer of the fault block trap according to the conducting capability index of the target conducting fault, the shielding capability index of the target shielding fault and the trap aggregation index of the target layer of the fault block trap; And sequencing all the fault block trapping in the target work area according to the hiding potential indexes corresponding to all the target layers of each fault block trapping to obtain a fault block trapping hiding potential sequencing result.
2. The method for evaluating the potential of a fault block trap as defined in claim 1, wherein normalizing the geological parameters of the target layer based on the classification result of each fault in the corresponding fault block trap to obtain the standard geological parameters of the target layer comprises: According to the corresponding conducting faults of each fault block trap target layer, determining the fault block trap with the same conducting fault as the fault block trap of the same cause type; based on the geological parameters of the target layer of all the broken block trapping in the same cause type, carrying out standardized processing on the geological parameters of the target layer of each broken block trapping in the same cause type to obtain the standard geological parameters of the target layer of each broken block trapping; if a plurality of conducting faults exist in the target layer of the fault block trap, the fault block trap is classified into a cause type corresponding to any one of the conducting faults.
3. The method for evaluating the potential of a fault block trap as defined in claim 2, wherein the step of normalizing the geological parameters of the target layer of each fault block trap in the same cause type based on the geological parameters of the target layer of all fault block traps in the same cause type to obtain the standard geological parameters of the target layer of each fault block trap comprises the steps of: Selecting a maximum value from the geological parameters of the target layer of all the broken block trap of the same cause type; Substituting the maximum value and the geological parameters of the target layer of each broken block trap in the same cause type into a standardized algorithm for calculation to obtain the standard geological parameters of the target layer of each broken block trap; The expression of the normalization algorithm is as follows: Wherein, the Standard geological parameters of the i-th type in the target layer for the broken block trap, Absolute values of the ith geological parameter in the target layer for the broken block trap; is the maximum value of the same type of geological parameters in the same cause geological parameters.
4. The method of claim 1, wherein calculating the standard fault parameters of the target fault to determine the fault conductivity index comprises: substituting the standard fault parameters of the target fault into a fault conductivity index algorithm to calculate so as to obtain a fault conductivity index of the target fault; the expression of the conductivity index algorithm is as follows: Wherein: is the conductivity index of the jth target conductivity fault, Fault activity rates in the standard fault parameters for the target conducting fault, Fault inclination in the standard fault parameters of the fault is conducted for the target, The slice surface curvature in the standard slice parameters for the target conducting slice, And importing fault smearing factors in the standard fault parameters of the fault for the target.
5. The method for evaluating the hidden potential of a fault block trap according to claim 1, wherein the method is characterized by calculating standard fault parameters of a target shielding fault to determine a shielding capability index of the target shielding fault, wherein the target shielding fault is a shielding fault corresponding to a target layer of the fault block trap, and comprises the following steps: Substituting the standard fault parameters of the target shielding fault into an shielding capacity index algorithm to calculate so as to obtain the shielding capacity index of the target shielding fault; The expression of the occlusion ability index algorithm is as follows: Wherein, the Is the occlusion conductivity index of the mth object occlusion fault, The fault smearing factor in the standard fault parameters of the fault is occluded for the target, The fault activity rate in the standard fault parameters of the occlusion fault for the target, The fault inclination angle in the standard fault parameters of the fault is blocked for the target, The object is occluded for the fault surface curvature in the standard fault parameters of the fault.
6. The method for evaluating the potential of a broken block trap according to claim 1, wherein calculating a standard trap parameter corresponding to a target layer of the broken block trap to determine a trap aggregation index of the target layer of the broken block trap comprises: Substituting the standard trap parameters corresponding to the target layer of the block trap into a trap aggregation index algorithm to calculate so as to obtain a trap aggregation index of the target layer of the block trap; The expression of the trap aggregation index algorithm is as follows: Wherein, the Is the trap aggregation index of the x-th target layer of the broken block trap, For the thickness of the trapping reservoir in the standard trapping parameters corresponding to the target layer, For the trap reservoir area in the standard trap parameters corresponding to the target layer, The formation dip in the standard trap parameters corresponding to the target layer, For the mud-to-ground ratio in the standard trap parameters corresponding to the target layer, And the trap burial depth in the standard trap parameters corresponding to the target layer.
7. The method of evaluating the potential of a fault trap as defined in claim 1, wherein determining the potential of a fault trap for a target layer based on the conductivity index of the target conductivity fault, the occlusion capacity index of the target occlusion fault, and the trap aggregation index of the target layer of the fault trap comprises: substituting the transmission capability index of the target transmission fault, the shielding capability index of the target shielding fault and the trap aggregation index of the target layer of the block trap into a hidden potential index algorithm for calculation to obtain the hidden potential index of the target layer of the block trap; the expression of the hidden potential index algorithm is as follows: Wherein, the Is the hiding potential index of the xth target layer of the broken block trap, n is the number of the conducting faults corresponding to the target layer of the broken block trap, Is the conductivity index of the target conductivity fault, Is the minimum occlusion capability index in all occlusion faults corresponding to the object layer of the fault block trap, Is the trap aggregation index of the x-th target layer of the broken block trap.
8. The method for evaluating the potential of a segment trap as defined in claim 1, wherein the step of sorting the segments in the target work area according to the potential indexes of the segment trap corresponding to all the target layers to obtain a segment trap potential sorting result comprises the steps of: Determining the average hiding potential index of each broken block trap according to the hiding potential indexes corresponding to all the target layers of each broken block trap; And sequencing the average hiding potential indexes corresponding to the block trapping in the target work area according to the sequence from large to small to obtain a block trapping hiding potential sequencing result.
9. A computer readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, realizes the steps in the method of evaluating the hidden potential of a broken block trap according to any of claims 1 to 8.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the computer program, realizes the steps of the method for evaluating the hidden potential of a break trap according to any one of claims 1 to 8.

Description

Method, medium and equipment for evaluating hidden potential of broken block trap Technical Field The application relates to the technical field of petroleum, in particular to a method, medium and equipment for evaluating the potential of a broken block trap. Background The trap is the minimum unit of oil gas accumulation, and the accumulation of oil gas in a single trap is the oil gas reservoir. The fault block trap belongs to one type of fault trap, and refers to a structural trap formed by intersecting two or more faults. In the process that oil gas enters the broken block trap to form an oil gas reservoir, the fault at the low position is constructed to play a role in transporting and guiding the oil gas, and the fault at the high position is constructed to play a role in shielding the oil gas. As an important trap type of a hydrocarbon reservoir, particularly an eastern trap basin hydrocarbon reservoir in China, the evaluation on trap potential is mainly qualitative at present, namely, the current evaluation system depends on experience, analogy and subjective judgment of geologists to a great extent, and the evaluation result obtained by the evaluation method may have the problem of insufficient precision. Disclosure of Invention The application provides a method, medium and equipment for evaluating the potential of a broken block trap, and aims to realize accurate evaluation of the potential of the broken block trap in a quantitative mode. The first aspect of the embodiment of the application provides a method for evaluating the potential of a broken block trap, which comprises the following steps: Obtaining geological parameters of a target layer of the interrupted block trap of the target work area, wherein the geological parameters comprise trap parameters and fault parameters of all faults corresponding to the target layer; according to the function of each fault corresponding to the target layer for oil gas migration in the fault block trap, classifying each fault corresponding to the target layer, and obtaining a classification result of each fault in the corresponding fault block trap; based on classification results of all faults in corresponding fault block trap, standardizing geological parameters of a target layer to obtain standard geological parameters of the target layer, wherein the standard geological parameters comprise standard trap parameters and standard fault parameters of all faults corresponding to the target layer; calculating standard fault parameters of a target conducting fault, and determining a conducting capability index of the target conducting fault, wherein the target conducting fault is a conducting fault corresponding to a target layer of a fault block trap; calculating standard fault parameters of a target shielding fault, and determining a shielding capacity index of the target shielding fault, wherein the target shielding fault is a shielding fault corresponding to a target layer trapped by a fault block; calculating standard trap parameters corresponding to the target layer of the block trap, and determining trap aggregation indexes of the target layer of the block trap; Determining a hiding potential index of the target layer of the fault block trap according to the conducting capability index of the target conducting fault, the shielding capability index of the target shielding fault and the trap aggregation index of the target layer of the fault block trap; And sequencing all the fault block trapping in the target work area according to the hiding potential indexes corresponding to all the target layers of each fault block trapping to obtain a fault block trapping hiding potential sequencing result. Optionally, normalizing the geological parameters of the target layer according to the cause type of the broken block trap to obtain the standard geological parameters of the target layer, including: According to the corresponding conducting faults of each fault block trap target layer, determining the fault block trap with the same conducting fault as the fault block trap of the same cause type; based on the geological parameters of the target layer of all the broken block trapping in the same cause type, carrying out standardized processing on the geological parameters of the target layer of each broken block trapping in the same cause type to obtain the standard geological parameters of the target layer of each broken block trapping; if a plurality of conducting faults exist in the target layer of the fault block trap, the fault block trap is classified into a cause type corresponding to any one of the conducting faults. Optionally, based on the geological parameters of the target layer of all the fault block trap in the same cause type, carrying out standardization processing on the geological parameters of the target layer of each fault block trap in the same cause type to obtain standard geological parameters of the target layer of each fault block trap, inc