Method for analyzing rock facies of shale bed section

A technology for rock and shale, which is applied in the field of lithofacies analysis of shale intervals, can solve problems such as the unsatisfactory subdivision effect of shale intervals, and achieve the effects of improving single well productivity, concise analysis methods, and easy operation.

Active Publication Date: 2015-12-30
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, the existing facies or lithofacies analysis methods can no longer achieve a satisfactory subdivision effect of shale intervals.

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  • Method for analyzing rock facies of shale bed section
  • Method for analyzing rock facies of shale bed section
  • Method for analyzing rock facies of shale bed section

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[0032] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so that implementers can fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0033] Facies or lithofacies is an important concept. Through phase relations and relative comparisons, geologists can determine regular or cyclical vertical sequences or facies sequences from chaotic and extremely thick strata. So as to achieve the purpose of subdividing the strata, and thus lay the foundation for geological research.

[0034] The definition of phase has undergone a complex...

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Abstract

The invention discloses a method for analyzing the rock facies of a shale bed section. The method includes the following steps that a classification and naming rule of the rock facies is established; the rock facies boundary is recognized; the types of the rock facies are divided; the characteristics of the rock facies are described, and thus the favorable rock facies can be made definite; the distribution range of the rock facies is analyzed; comprehensive assessment of the rock facies is conducted. The analysis method is simple, clear, practical and easy to operate. By the adoption of the analysis method, the exquisite layering problem of a large set of extremely-thick and monotonous shale bed section can be solved quickly, and thus 'selecting the best from the splendid' in layer commenting and section choosing as well as in fracturing layer choosing using the rock facies as the unit is carried out based on the geology, development and engineering integrated principle, and therefore the economic aims of decreasing costs and increasing benefits and the aim of improving the single-well production capacity of shale oil and gas can be achieved.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a method for analyzing lithofacies in shale intervals. Background technique [0002] Facies or lithofacies is an important concept. Through phase relations and relative comparisons, geologists can determine regular or cyclical vertical sequences or facies sequences from chaotic and extremely thick strata. So as to achieve the purpose of subdividing the strata, and thus lay the foundation for geological research. [0003] The definition of phase has undergone a complex and long evolution process. "Face" was first introduced into geology by Steno (N. Steno, 1669) of Denmark. Originally, the meaning of "phase" was equivalent to "period" or "stage". It was Switzerland's Gressly (A. Gressly, 1938) who introduced "facies" into sedimentology. He believes that only rock units or rock masses with the same petrological and paleontological characteristics can be regarded as a faci...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 彭勇民胡宗全高波龙胜祥朱彤边瑞康聂海宽王烽杜伟
Owner CHINA PETROLEUM & CHEM CORP
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