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Rock physical modeling and longitudinal wave velocity estimation method considering compaction effect

A technology of petrophysical modeling and longitudinal wave velocity, applied in geophysical measurement, instruments, etc., can solve the problems of not considering the compaction effect and the accuracy needs to be further improved, so as to achieve reliable prediction, reduce development risk, and improve estimation accuracy Effect

Active Publication Date: 2022-03-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

This method uses the V-R-H average formula when calculating the dry rock skeleton modulus, without considering the impact of compaction, and the accuracy needs to be further improved

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  • Rock physical modeling and longitudinal wave velocity estimation method considering compaction effect
  • Rock physical modeling and longitudinal wave velocity estimation method considering compaction effect
  • Rock physical modeling and longitudinal wave velocity estimation method considering compaction effect

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Embodiment Construction

[0046] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0047] Such as figure 1 as shown, figure 1 It is a flow chart of the method for rock physics modeling and compressional wave velocity estimation considering compaction in the present invention.

[0048] Step 101, obtaining the elastic modulus of rock minerals. The minerals that make up sandstone are mainly quartz and clay, and their elastic modulus can be obtained through core laboratory tests.

[0049] Step 102, input well logging interpretation results. Through logging interpretation, three curves of porosity, shale content and water saturation are obtained. The porosity curve is used to characterize the size of rock porosity, and it needs to be used in the process of calculating the elastic modulus related to porosity, such as rock skeleton elas...

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Abstract

The invention provides a rock physical modeling and longitudinal wave velocity estimation method considering a compaction effect. The method comprises the following steps: step 1, acquiring an elastic modulus of a rock mineral; 2, obtaining a logging interpretation result; 3, calculating the modulus of the rock skeleton by using the improved V-R-H model; 4, calculating the elastic modulus of the dry rock; step 5, respectively calculating volume moduli of oil and water; 6, calculating the modulus of the mixed fluid after the oil and the water are mixed; 7, calculating the elastic modulus of the saturated rock; and step 8, calculating the longitudinal wave velocity of the weakly consolidated sandstone. According to the rock physical modeling and longitudinal wave velocity estimation method considering the compaction effect, an existing rock skeleton calculation model is improved, the concept of rock consolidation factors is provided, the applicability of a rock physical model is improved, and the method has a good application effect on calculation of the longitudinal wave velocity of shallow weakly consolidated rocks.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a rock physics modeling and compressional wave velocity estimation method considering compaction. Background technique [0002] Rock physics is a bridge connecting reservoir properties and seismic data, which can provide a theoretical basis for the interpretation of seismic data and reduce the ambiguity of seismic interpretation. [0003] With the continuous improvement of oil and gas exploration, the use of high-precision seismic data to carry out structural interpretation can no longer meet the needs of exploration and production. The prediction of reservoir lithology, physical properties, and fluid properties puts forward higher requirements for the use of seismic data. Require. Seismic data contain rich information, and elastic parameters such as P-wave velocity, S-wave velocity, P-wave velocity ratio, Poisson's ratio, and density can be obtained by inversion. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 杨国杰王学军张奎华尹克敏王有涛相鹏李竹强陈学国魏敏李学良
Owner CHINA PETROLEUM & CHEM CORP