Method and device for determining river type conversion of fluvial facies stratum

A technology of rivers and formations, applied in the field of geological research, can solve the problems of differences in division methods, affect the effect of exploration and development, and fail to provide quantitative determination of river type changes, etc., and achieve the effect of improving the effect

Active Publication Date: 2020-08-28
PETROCHINA CO LTD
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Problems solved by technology

However, it is limited to qualitatively describing the change trend of the river type, and does not provide a method for quantitatively determining the change of the ri...

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  • Method and device for determining river type conversion of fluvial facies stratum
  • Method and device for determining river type conversion of fluvial facies stratum

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] The embodiment of the present invention provides a method for determining the river-type transformation of fluvial strata, which is used to quantitatively determine the vertical section position of the river-type transformation of fluvial strata, such as figure 1 As shown, the method includes:

[0029] Step 101: Based on the sedimentary background analysis, core observation and logging facies analysis of the target area, determine the fluv...

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Abstract

The invention provides a method and device for determining river type conversion of a fluvial facies stratum. The method comprises the steps: determining a fluvial facies sedimentary layer section ofa target region, and dividing sand groups according to the sedimentary cycle characteristics of the fluvial facies sedimentary layer section; on the basis of the fluvial facies sedimentary stratum profile, carrying out statistics to obtain sensitive sedimentary parameters in each divided sand group and using the sensitive sedimentary parameters for reflecting river type changes; acquiring sensitive sedimentary parameters in each sand group according to statistics, determining indication sensitive parameters with obvious characteristic response in the sensitive sedimentary parameters, and calculating a change rate average value of the indication sensitive parameters of each sand group; and according to the change rate average value of the indication sensitive parameters of each sand group,determining the river type conversion vertical layer section position of the fluvial facies stratum in the target area. The vertical layer section position of river type conversion of the fluvial facies stratum is quantitatively determined based on logging data, plane and profile sand body distribution characteristics of different layers of sections in the fluvial facies stratum can be more accurately implemented, and the effect of exploration and development deployment is improved.

Description

technical field [0001] The invention relates to the technical field of geological research, in particular to a method and device for determining river-type transformation of fluvial strata. Background technique [0002] There are abundant mineral resources in fluvial sediments, and fluvial sand bodies are important reservoir types in many petroleum-bearing basins at home and abroad. The spatio-temporal transformation of the river type directly affects the plane and section distribution of favorable reservoirs. In the field of oil and gas exploration, the braided river sand bodies distributed contiguously in the same study area form structural oil reservoirs, which evolve into banded reservoirs due to the river type transformation. The distributed meandering river sand bodies have the exploration potential of lithologic reservoirs. In the field of oil and gas development, river type conversion may cause different distribution of sand bodies and interlayers in different subla...

Claims

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Application Information

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IPC IPC(8): G01V9/00
CPCG01V9/00
Inventor 陈彬滔杨丽莎白洁史忠生王磊赵伟薛罗马轮史江龙
Owner PETROCHINA CO LTD
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