Scientific and technical journal

«Geology, geophysics and development of oil and gas fields»

ISSN 2413-5011

Geology, geophysics and development of oil and gas fields
Identification of a high-conductive fault in a homogeneous formation based on the data of the nearby wells observation testing

UDC: 622.276.5.001.5
DOI: 10.33285/2413-5011-2022-11(371)-42-53

Authors:

YUDIN VALERIY A.1,
VOLPIN SERGEY G.1,
EFIMOVA NATALIA P.1,
AFANASKIN IVAN V.1,
KOROLEV ALEXANDER V.1,
LOMAKINA OLGA V.1

1 Federal Research Center Scientific Research Institute for System Analysis of the Russian Academy of Sciences, Moscow, Russia

Keywords: wells observation testing, wells interference testing, fault permeability structure, high-conductive fault, high-conductive channel

Annotation:

The possibility of identification of three models of a formation composition with a detected fault based on the interference testing data of two wells located on one side from the fault such as a fault non-significant from a filtration point of view, impermeable screen; high-conductive fault is analyzed. Multi-variant computer modeling of interference testing was used for studying. The formation perturbing effect was reached by a single putting into operation of a production well. It was shown 1) which one of the mentioned above models can be identified as corresponding to the reality under some variants of the task geometry; 2) moreover, such goal can be achieved in case when the pressure measurement error is no higher than 0,05 % and the time of the study should last from a week up to 2 months depending on the measurement conditions; 3) a preparatory stage should be required when, based on the data of computer modeling, the expediency of the study, minimal channel conductivity, meaningful for the development, maximum acceptable error of pressure measurement, minimum possible prolongation of the reacting curves registration should be assessed.

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