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Method for explaining natural karst fracture stages by using imaging logging data

A technology of natural fractures and imaging logging, which is applied in the fields of resource exploration and geology, and can solve problems such as restricting imaging logging interpretation, difficulty, and inability to start

Active Publication Date: 2020-09-11
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

Geologically, the study of fracture stages is mainly obtained through observation and analysis of cores or field outcrops. Sometimes more core data are needed to obtain a clearer understanding, while imaging logging data is indirect information, and the logging data is used to study the stages of fractures. Not only is it extremely difficult, but it is almost impossible to start. It has always been the technical bottleneck restricting the interpretation of fractures by imaging logging

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  • Method for explaining natural karst fracture stages by using imaging logging data
  • Method for explaining natural karst fracture stages by using imaging logging data
  • Method for explaining natural karst fracture stages by using imaging logging data

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Embodiment

[0056] The Sinian multi-stage fracture identification in block A is based on core analysis and comprehensive geological research, and the fracture stages in this area are identified using imaging logging data, including the following steps:

[0057] 1. According to the research results of core observation and regional tectonic movement history and mechanism, the fractures in this area are superimposed by multi-phase tectonic movements, forming four phases of fractures, and the direction of the main fractures is northeast-southwest, and northwest-southeast to group 2, other directions are secondary fracture directions, late stage fractures are mainly high-angle fractures above 70°. Fractures are subject to multi-stage dissolution and filling, the relationship between fractures and dissolved pores, the properties of fracture fillings, the occurrence of fractures, the width and density of fractures, and the cutting relationship between fractures are important indicators to disting...

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Abstract

The invention discloses a method for explaining natural karst fracture stages by using imaging logging, which comprises the following steps of: 1, researching rock core observation and regional tectonic movement history and mechanism, determining control factors and development distribution rules of natural fractures, and extracting characteristic marks of the fracture stages; 2, obtaining rock core calibration imaging logging data; 3, distinguishing natural fractures and induced fractures by using imaging logging information; 4, distinguishing a tectonic fracture and a diagenetic fracture byusing imaging logging information; 5, extracting parameters such as the width, the density, the length and the occurrence of the fracture; 6, identifying a group system of the natural fractures according to the extracted fracture occurrence parameters; 7, explaining the mutual sequence of the fractures according to the mutual relation of the group fractures and the characteristic marks identifiedby the fracture stages; and 8, determining the formation periods of the fractures one by one according to the formation sequence of the group fractures. The method for explaining the natural karst fracture stages by using imaging logging disclosed by the invention provides a new way for deep development of oil and gas geology comprehensive research.

Description

technical field [0001] The invention belongs to the fields of resource exploration and geology, and in particular relates to a method for interpreting the phases of natural karst fractures with imaging logging data, which is used for interpreting the development sequence of underground natural fractures with well logging data. Background technique [0002] Carbonate rock fractures are important pathways for oil and gas migration and storage spaces. Fractures play an important role in increasing oil and gas production, and are very important for the study of reservoir fractures. The study of fracture stages is of great significance for the study of fracture origin and development and distribution. Interpreting the fracture stages is not only beneficial to the study of fracture origin, but also helps to evaluate the relationship between fractures, reservoirs and oil and gas reservoirs, and the effectiveness of fractures. of great value. [0003] The understanding of downhole ...

Claims

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Application Information

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IPC IPC(8): G01V3/18G01V3/38
CPCG01V3/18G01V3/38
Inventor 张树东齐宝权贺洪举黄宏罗利刘航
Owner BC P INC CHINA NAT PETROLEUM CORP
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