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Reservoir characteristic evaluation method and device for fault-karst body oil and gas reservoirs

A technology for oil and gas reservoirs and evaluation methods, which is applied in the field of fault-karst oil and gas reservoir property evaluation, can solve the problems of reducing the production efficiency of fault-karst oil and gas reservoirs, low oil and gas production, and low accuracy, and achieves improved production efficiency and efficiency. The effect of oil and gas production, accuracy and reliability

Active Publication Date: 2021-08-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, only relying on the existing human experience and the characteristics of the adjacent drilled reservoirs to evaluate the oil and gas reserves of the reservoir and determine the location of the wellbore to be drilled according to the oil and gas reserves, the accuracy of the evaluation is low, and it also reduces the storage capacity of fault-karst reservoirs. production efficiency and oil and gas production

Method used

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  • Reservoir characteristic evaluation method and device for fault-karst body oil and gas reservoirs
  • Reservoir characteristic evaluation method and device for fault-karst body oil and gas reservoirs
  • Reservoir characteristic evaluation method and device for fault-karst body oil and gas reservoirs

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Embodiment 1

[0055] figure 1 It is a schematic flowchart of the method for evaluating the reservoir properties of fault-karst body oil and gas reservoirs provided in Embodiment 1 of the present invention. figure 2 It is a schematic flow chart of determining the fracture attribute and seismic attribute of the reservoir to be tested in the fault-karst reservoir reservoir property evaluation method provided in Embodiment 1 of the present invention. image 3 It is a schematic flowchart of determining the three-dimensional geometric models of the reservoir and caprock to be tested in the fault-karst reservoir reservoir property evaluation method provided in Embodiment 1 of the present invention. Figure 4 It is a schematic flow chart of determining the three-dimensional geometric model of the reservoir to be tested in the fault-karst reservoir reservoir property evaluation method provided in Embodiment 1 of the present invention. Figure 5 It is a schematic flow chart of determining the reser...

Embodiment 2

[0101] Figure 8 The structure schematic diagram of the fault-karst body oil and gas reservoir reservoir characteristic evaluation device provided for the second embodiment of the present invention, as Figure 8 As shown, Embodiment 2 of the present invention provides a reservoir characteristic evaluation device 8 of fault-karst body oil and gas reservoirs, including:

[0102] The first analysis module 81 is configured to acquire seismic data of the area where the reservoir to be tested is located, and determine the fracture attribute and seismic attribute of the reservoir to be tested according to the seismic data.

[0103] It should be noted that the seismic data involved in this embodiment may include time-domain seismic data and depth and seismic data, as well as seismic data processed by pre-stack depth migration technology. Fracture and seismic properties of the reservoir. Among them, the fault attribute refers to the development size of the fault system in the area wh...

Embodiment 3

[0110] Figure 9 It is a schematic structural diagram of a fault-karst body oil and gas reservoir reservoir property evaluation device provided in Embodiment 3 of the present invention. Such as Figure 9 As shown, the fault-karst body reservoir property evaluation device 9 provided in Embodiment 3 of the present invention includes:

[0111] The memory 91 is used to store instructions; specifically, the storage objects of the memory 91 include software and modules. The processor 92 is configured to execute the instructions stored in the memory 91 to execute the reservoir characteristic evaluation method of the fault-karst body oil and gas reservoir provided in the first embodiment above. The processor 92 executes various functions and processes data of the fault-karst reservoir property evaluation device 9 by running or executing software programs and / or modules stored in the memory 91 and calling data stored in the memory 91 .

[0112] Specifically, the processor 92 is used...

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Abstract

The invention provides a method and device for evaluating the characteristics of fault-karst oil and gas reservoirs, wherein the method includes: acquiring seismic data of the area where the reservoir to be tested is located, determining the fracture properties and seismic properties of the reservoir to be tested according to the seismic data; The attributes and seismic attributes determine the three-dimensional geometric model of the reservoir to be tested; the reservoir static characteristics of the reservoir to be tested are determined according to the three-dimensional geometric model of the reservoir to be tested. The method and device for evaluating the reservoir characteristics of the fault-karst oil and gas reservoir provided by the invention can effectively determine the oil and gas content characteristics of the fault-karst oil and gas reservoir, and use the oil and gas content characteristics to determine the position of the wellbore to be drilled and guide the fault-karst oil and gas reservoir. Potential tapping of failed wells or lying wells improves the exploitation efficiency and oil and gas production of fault-karst oil and gas reservoirs.

Description

technical field [0001] The invention relates to the technical field of exploration and development of fracture-cavity carbonate rock reservoirs, in particular to a method and device for evaluating reservoir properties of fault-karst body oil and gas reservoirs. Background technique [0002] The types of carbonate reservoirs are mainly fracture-cavity reservoirs, which have strong heterogeneity and poor connectivity. The production characteristics of oil and gas reservoirs generally show the characteristics of "one well and one reservoir", and different "single wells" also have different Due to the oil-gas-water relationship, the reservoir characteristics of fracture-cavity reservoirs are completely different from those of common clastic reservoirs. The faulted karst oil and gas reservoir is a karst fracture-cavity system with a three-dimensional space structure formed by the dissolution and reformation of karst water along the fractured zone of the carbonate rock formation u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
Inventor 江同文邓兴梁李世银关宝珠王彭赵龙飞沈春光
Owner PETROCHINA CO LTD