A Determination Method of S-wave Logging in Different Lithology Reservoirs
A determination method and technology of lithology, applied in the field of shear wave logging determination of different lithology reservoirs, can solve the problem of high cost of shear wave logging instrument measurement, and achieve the effect of wide application range and high calculation accuracy
Active Publication Date: 2019-12-13
VICTORY SOFT CORP
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Problems solved by technology
Shear wave logging tools are expensive to measure, and only a few exploration wells and development wells have shear wave logging data
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[0032] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0033] figure 1 A schematic flow chart of a shear wave logging determination method for different lithology reservoirs provided by an embodiment of the present invention, as shown in figure 1 As shown, the method in this embodiment may include:
[0034] When the logging data contains shale content curves, the formation compressional wave time difference, rock bulk density, and shale content can be obtained from the logging data;
[0035] According to the lithology type of the formation, determine the ...
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The invention provides a shear wave logging determination method for different lithologic reservoirs. The method comprises steps: when the logging data contain a shale content curve, a stratigraphic longitudinal wave time difference, a rock volume density and the shale content are acquired through the logging data; according to the type of stratigraphic lithology, a shear wave time difference correction coefficient and a correction value are determined; and according to the stratigraphic longitudinal wave time difference, the rock volume density, the shale content, the shear wave time difference correction coefficient and the correction value, shear wave time differences for different lithologic strata are calculated according to a preset depth step. The stratigraphic shear wave time difference can be calculated by only using the conventional logging data, the method is thus applicable to unconventional oil and gas strata, carbonate strata, igneous strata, glutenite strata, sand mudstone strata, tight sandstone strata and the like, the application range is wide, and the shear wave time difference calculation precision is high.
Description
Technical field: [0001] The invention relates to the technical field of well logging, in particular to a method for determining shear wave well logging in different lithology reservoirs. Background technique: [0002] Shear wave time-lapse data plays an important role in oilfield exploration and development. The shear wave time difference is the necessary information for calculating rock mechanics parameters, and the ground stress parameters, formation fracture pressure and formation collapse pressure can be further calculated through rock mechanics parameters. Rock mechanical parameters have important application value for drilling, oil production, geology, downhole operation and other projects. For example, the study of oil and gas migration laws, the analysis of wellbore stability in drilling, the calculation of rock mechanics parameters and in-situ stress parameters used in hydraulic fracturing, and the design of water injection pressure when the oil layer enters the wa...
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IPC IPC(8): G01V1/40
CPCG01V1/40G01V2210/163G01V2210/6222
Inventor 李颖许博越郑健周林帅刘伟李敏慧刘亚囡
Owner VICTORY SOFT CORP