A fine division method for deep/ultra-deep carbonate sedimentary microfacies based on lithoelectric interpretation model

A carbonate rock and sedimentary microfacies technology, applied in the field of petroleum exploration and development, can solve problems such as early formation time, great controversy over existing results, and influence on progress of understanding, so as to improve accuracy, enhance understanding, and ensure accuracy. Effect

Active Publication Date: 2022-05-31
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

However, due to the early formation of deep / ultra-deep carbonate formations, several tectonic movements, and special environments such as high temperature and high pressure, the research on the division of sedimentary microfacies of deep / ultra-deep carbonate rocks is relatively sluggish, and There is a lot of controversy over the existing results, which not only affects the understanding of the genetic mechanism of deep / ultra-deep carbonate reservoirs, but also restricts the progress of oil and gas exploration

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  • A fine division method for deep/ultra-deep carbonate sedimentary microfacies based on lithoelectric interpretation model
  • A fine division method for deep/ultra-deep carbonate sedimentary microfacies based on lithoelectric interpretation model
  • A fine division method for deep/ultra-deep carbonate sedimentary microfacies based on lithoelectric interpretation model

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[0039] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] like figure 1 As shown, the present invention includes the following steps ( figure 1 ):

[0041] S1. According to the geological background data, collect and sort out the coring data of the target area, screen out the relatively complete and representative well positions for coring, carry out core observation, and use 10% dilute hydrochloric acid to quickly identify the lithology. The characteristics of the top and bottom of the frequency cycle, the core cycle is divided, the sedimentary cycle is the basic unit, and the samples are collected according to the lithology.

[0042] S11. According to the geological background data, collect and sort out the coring data of the target area, screen out the relatively complete and representative well positions for coring, observe the core, and use 10% dilute hydrochloric acid to quickly iden...

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Abstract

The present invention proposes a method for finely dividing the sedimentary microfacies of deep / ultra-deep carbonate rocks based on a lithoelectric interpretation model. Classification, performing characteristic curve fusion processing on logging curves through principal component analysis, extracting characteristic curves of different rock types, and establishing rock-electrical interpretation models, so as to realize the identification and calibration of deep / ultra-deep carbonate rock types ; analysis of the vertical and horizontal development laws and superimposed relationships of rock types, determine the regional sedimentary model, and then finely divide the sedimentary microfacies of different rock types, and further restore the sea level change curve. The invention can not only improve the precision of sedimentary microfacies division and ensure the accuracy of geological information, but also improve the understanding of sedimentary facies, provide support for actual exploration deployment decisions, and further reduce exploration risks and investment in exploration costs.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploration and development, and particularly relates to a method for finely dividing deep / ultra-deep carbonate sedimentary microfacies based on a petroelectric interpretation model. Background technique [0002] According to the international common methods and drilling engineering specifications [buried depth ≥ 15000ft (4500m)], and my country's "oil and gas reserves calculation specification" (buried depth ≥ 3500m), and combined with the actual exploration and development work, the depth of 4500m in the western region (more than 6000m is Ultra-deep layers) and 3,500m deep in the eastern region (more than 4,500m are ultra-deep layers), which are defined as the occurrence areas of deep oil and gas resources. [0003] In recent years, domestic oil and gas exploration in deep / ultra-deep carbonate formations has successively made major discoveries in the Tarim, Ordos, Sichuan and other basins. Oil...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06K9/62G01N33/24
CPCG06F30/20G01N33/24G06F18/2135G06F18/24G06F18/25Y02A90/30
Inventor 王保保谭秀成刘宏肖笛熊鹰杨应芦飞凡李明隆
Owner SOUTHWEST PETROLEUM UNIV
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