Features of permeability anisotropy accounting in the hydrodynamic model

Abstract

Important step in the construction of a geological and hydrodynamic model is to set the correct properties of the formations and further adapt the model to the historical development data. Main source of information on the geological properties of reservoirs is well logging data.
 Paper describes the application of the method for post-interpretation processing of logging data, with the help of which the lateral anisotropy value of the field site is found. Brief discussion on the algorithm for adapting the hydrodynamic model to the parameters of the formation using one reference well is given. Feature of the logging data application to study the phenomenon of permeability anisotropy is that this type of research is widespread, has sufficient information content, and the geophysical system itself does not require the inclusion of specialized instruments. Based on geophysical study, a volumetric model of the properties for oil and gas bearing formation is constructed, from which the permeability distribution is used, whose gradient allows establishing the directions of improved and deteriorated filtration properties.
 As a result, during adaption of the model, it was possible to achieve a difference in reserves between the geological and hydrodynamic models of 2.4 %, which is an acceptable deviation for further calculations. It was found that the direction of improved filtration properties has a northeastern direction at an angle of 35°, and the value of lateral anisotropy is 2.2.
 Obtained results of lateral anisotropy, taking into account the data on values of vertical anisotropy, are included in the field model, where it is planned to further study the effect of permeability anisotropy on formation productivity.

Strategy of water-flooding enhancement for low-permeable polymictic reservoirs

“…All processes occurring in the reservoir system, when oil is displaced by various injected agents, are taken into account in the model due to changes in the curves of relative phase permeabilities (Fig. 3), constructed according to existing research in the scientific literature [34][35][36][37][38][39], as well as due to the previously mentioned effects of changing the reservoir properties (reservoir properties) of the reservoir system, in particular, permeability.…”

Water Balance Calculation Based on Hydrodynamics in Reservoir Operation

“…In view of this situation, the concept of the land zone in front of the dam was proposed [24]. Using the gradient of the water surface line [25,26], we divided the reservoir area into two parts, one for the land zone in front of the dam, and the other for a natural channel. The strictly straight land zone obeys the assumption of a static capacity curve, so the reservoir capacity can be calculated accurately.…”

Анализ Результатов Гидропрослушивания Пласта Юс2 Вишневского Нефтяного Месторождения

“…Разработка нефтяных и газовых месторождений на сегодняшний день требует обязательного построения максимально точных гидродинамических моделей объекта разработки [1,2]. Для качественного проектирования и настройки параметров пласта в моделях необходима точная информация о его состоянии и процессах, происходящих в пласте [3].…”

“…В [15] показано, как методы гидропрослушивания межскважинного пространства, применяемые на Чаяндинском нефтегазоконденсатном месторождении, позволили оценить проводимость одного из выделенных разломов до ввода рассматриваемого участка в эксплуатацию. В работе [1] описаны результаты проведения гидропрослушивания пласта на нефтяном месторождении в Тимано-Печорском регионе, а в [16] -на Ново-Серебрянском нефтяном месторождении Калининградской области. Авторы [17] уточнили геологическое строение Юрубчено-Тохомского месторождения по данным исследований скважин методом гидропрослушивания.…”