METHOD FOR EXTRACTION OF OIL DEPOSIT Russian patent published in 2007 - IPC E21B43/16 

FIELD: oil extractive industry, possible use during extraction of oil pools, in particular at later stages of extraction of watered pools with complicated geological conditions.

SUBSTANCE: method includes geo-physical research of structure of beds and research of wells, drilling of product and force wells, extraction of oil from product wells, forcing of displacing agents into force wells and usage of methods for affecting productive formations. Acoustic emission is registered preliminarily across the area of deposit. On basis of registration results sources of acoustic activity and distribution of fissuring across each productive formation is determined. During extraction, acoustic emission is registered in relation to area also in real time, on basis of total of change of acoustic emission and deposit extraction characteristics, in particular, isobar maps and water content of wells, weakly drained, sediment and washed zones are detected, directions of filtration flows are changed, additional fissure generation is initiated and intensified in weakly drained and sediment zones up to level of registered noises matching level of noises of main displacement vector.

EFFECT: increased efficiency of extraction with increased oil recovery, current and final oil recovery due to operative processing and usage of information received from geological environment, connected to dynamic processes occurring in productive formation across whole area of deposit.

22 cl, 1 ex, 6 dwg