一种快速建立上覆岩层压力体的方法

doi:10.11720/wtyht.2021.2580

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Abstract

Overburden pressure is the source power of sedimentary compaction,and is also the key data to compute core pressure.This paper shows density variation with overburden pressure and core pressure,the effect of different thicknesses of mudstone on overburden pressure and core pressure.It is proved that the maximum core pressure variation is 0.02 while density variation of mudstone is 0.3 g/cm³ from 100 to 400 m,and overburden pressure is almost the same by density integration which is filtered form 3 to 250 Hz,which represents low-frequency tendency.Therefore,on the basis of the relationship between the effective stress of the normal compacted formation and the pressure of the overlying strata,a fast method was established for converting the pressure field according to the well-controlled seismic layer velocity field,which was verified by multiple drill holes in some structure of West Bohai Sea,thus satisfying rapid exploration.

Key words： overburden pressure density effect interval velocity

Received: 13 December 2019 Published: 29 April 2021

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	Articles by authors
	Xing ZHOU
	Ying LI
	Jun GUO
	Yu HE

Cite this article:

Xing ZHOU,Ying LI,Jun GUO, et al. A fast method for establishing pressure body of overburden[J]. Geophysical and Geochemical Exploration, 2021, 45(2): 490-495.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.2580 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I2/490

The map view of target wells

The density distribution characterstic of target wells

The overburden pressure of target wells

The overburden pressure as well as fitted pressure of six wells in a structure

The mudstone model of low density with different thickness

The overburden pressure calculated by mudstone of different thickness

The pressure coefficients calculated by mudstone of different thickness

The map view of Dongsan Member layer and drilled wells

A velocity profile superimposes on a seismic section of some structure in Bozhong

A overburden pressure profile superimposes on a seismic section

The overburden pressure calculated by different methods

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