Monitoring the development of gas-oil layers of area AB Samotlor field on the basis of hydrodynamic models

The effectiveness of the barrier flooding depends on the geological features of deposit structure, the properties of the saturating fluid, and in comparison with areal flooding recovery factor can provide gains of up to 10% and significantly reduce the production of gasbreakthrough [1, 2, 3]. Detailed settings for the digital filter model of geological and production data after the implementation of the system enables reliable monitoring of the quantitative assessment of these parameters can be. The results of monitoring the development of stocks of group formations AV1-5 Samotlor field with thebarrier waterflooding.
Materials and methods
For completing of the work geological field data on development of object of AV of Samotlor field have been used. Using digital filtrational model of the researched objectsthe assessment (comparison) of technological efficiency of the realized system of development to barrier flooding in comparison with classical intra planimetric without a barrier row has been made.
Results
As a result of performance of monitoring of the power characteristic on the basisof the hydrodynamic and geological field analysis it should be noted that application of barrier flooding in combination with various systems of vulgar flooding has provided:
• prevention of breaks of large volumes of gas of a gas cap by cutting by ranks of delivery wells of a gas-oil and clean oil zone from a gas cap;
• reduction of volumes of the oil which has taken root into a gas cap thereby having reduced irrevocable losses of oil;
• prevention of expansion of a gas cap and gasification of the extracting oil wellsthat has improved conditions of their operation;
• possibility of gas offtake from a gas cap with smaller pressure decrease in her.
Considerable amounts of pumping water in barrier wells promoted a water rush in production wells of a gas-oil zone, adjoining barrier ranks from outer side, to their sharp flood with increase in an output on liquid and decrease on oil.
The downloading large volumes of water in barrier wells of AV2-3 layer has caused considerable overflows of fluids betweenobjects, first of all a liquid overflow from object of AV2-3 in gas part of object of AB13 through extensive windows of merge.
Сonclusions
It should be noted that now it is possible to recognize efficiency of development of gas-oil zones of objects of the field satisfactory.The operational objects differing in geological conditions are characterized by various efficiency of the developed systems of development and efficiency of barrier flooding.
On separate layers efficiency of barrier flooding is various that is substantially caused by the technogenic factors taking place in case of its implementation.Implementation of barrier flooding also promoted promotion of large volumes of water in the gas heading.
Maintenance of development of objects of AV of Samotlor field using geological and hydrodynamic models provides continuous control of efficiency of development of inventories as oil and gas parts with a possibility of an operational assessment of scenarios of development.