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Logging quantitative recognition method for gravity flow sediments in down-warped lake basin

A quantitative identification and gravity flow technology, applied in the field of gravity flow sediment identification, can solve the problems of low accuracy and difficult to meet the needs of oilfield production, and achieve good results.

Inactive Publication Date: 2015-12-16
SOUTHWEST PETROLEUM UNIV +1
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Problems solved by technology

[0004] The existing sediment logging quantitative identification method has strong multi-solutions and low accuracy, and it is difficult to meet the needs of oilfield production. To solve this problem, the patent applicant researched and developed a depression lake basin gravity flow sediment logging quantitative identification method. the problem

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  • Logging quantitative recognition method for gravity flow sediments in down-warped lake basin
  • Logging quantitative recognition method for gravity flow sediments in down-warped lake basin

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specific Embodiment

[0015] In a specific embodiment, the present invention takes the following steps for identification:

[0016] 1. On-site core analysis

[0017] Carefully observe and describe the lithology and sedimentary characteristics of the coring well core, and establish the core facies analysis of the coring well; according to the latest theory of gravity flow deposition, analyze and observe the gravity flow type developed in the coring well, and summarize the different types of gravity flow. Characteristics of stream sediments (including lithology, structure, sedimentary structure) (Table 1).

[0018] Table 1 Gravity flow sediment types and their fluid properties, transport deposition mechanism and identification marks in the study area

[0019]

[0020] 2. Microscopic analysis of gravity flow sediments

[0021] For the ground rock thin slices (0.03mm thick) formed by different types of gravity flow sediments, observe, identify and count the types and contents of rock minerals, esp...

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Abstract

The invention discloses a logging quantitative recognition method for gravity flow sediments in a down-warped lake basin and belongs to the technical field of recognizing gravity flow sediments. According to the technical scheme of the invention, firstly, with the observation on the core of a cored well, the identification of an indoor rock slice and the logging information as a basis, the type recognition, the summarization of lithological characters and the summarization of sedimentary tectonics are conducted. After that, according to the geological thought that indirect data (the logging information) are calibrated based on direct data (the rock cores of different types of gravity flow sediments), logging suites of good response performances for different types of gravity flow sediments are preferably adopted through the data mining approach. In combination with the macroscopic and microscopic analysis on the rock cores of different types of gravity flow sediments, a logging response standard for different gravity flow sediments and deep-lake mudstones is established. Finally, the above method is verified based on the cored well. The established recognition method is good in quantitative recognition effect for gravity flow sediments in a research area and can also be applied to other areas.

Description

technical field [0001] The invention belongs to the technical field of gravity flow sediment identification, and in particular relates to a logging quantitative identification method of gravity flow sediment in depression lake basins. Background technique [0002] Gravity flow in faulted basins in my country was studied earlier, and a large number of oil and gas enrichment areas were discovered, such as Dongying and Chezhen sags (Shengli Oilfield) in the Jiyang Depression of the Bohai Bay Basin, the western sag of the Liaohe Depression (Liaohe Oilfield), Jizhong Depression Shulu Sag, Langgu Sag and Jinxian Sag (Huabei Oilfield), Biyang Sag in Nanxiang Basin (Henan Oilfield), Erlian Basin Jiergalangtu Sag, Saihantala Sag, Baiyinchagan Sag ( A number of gravity flow glutenite oil and gas fields or oil-bearing sand bodies have been discovered in rift basins such as Huabei Oilfield, and these gravity flow sand bodies have become important replacement areas for oil and gas fields i...

Claims

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Application Information

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IPC IPC(8): G01V1/40
Inventor 廖纪佳林丹廖明光张廷山
Owner SOUTHWEST PETROLEUM UNIV
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