METHOD FOR SEISMIC MONITORING OF PROCESS OF DEVELOPMENT OF HYDROCARBONS IN WATER AREAS

摘要

FIELD: geophysics.;SUBSTANCE: invention relates to geophysics and can be used to specify the structure of a deposit of hydrocarbons in water areas and increase the efficiency of its development. Proposed is a method for seismic monitoring of the process of development of a hydrocarbons deposits in water areas including three-dimensional seismic survey and building on its data a model of the reservoir, predicting orientation of subvertical cracks systems and designing arrangement of operational and injection wells, as well as arrangement at the bottom of the water area over the deposit of stationary seismic streamers, recording seismic traces with elastic vibrations from artificial sources and monitoring the process of development of the hydrocarbons deposit by dynamic and kinematic changes in the detected vibrations when processing the seismic traces. Before drilling of the projected horizontal section of the well arranged is a mobile seismic streamers liner on the bottom following a radial different-azimuth observation system on the object of survey with a center located above the horizontal section of the well. During drilling microseismic vibrations are recorded excited by the bit at the bottom hole, when processing which by dynamic and kinematic characteristics determined are anisotropic properties of the medium in the zone of drilling, specified is orientation of subvertical cracks systems and corrected are three-dimensional models of the reservoir. After completion of the well drilling the liner of seismic streamers is dismantled and moved to a new object of analysis. Herewith during the hydraulic fracturing microseismic vibrations are recorded, determined are three-dimensional coordinates of their sources and also refined is the three-dimensional model of the reservoir and orientation of the cracks systems.;EFFECT: technical result is the increase of efficiency of hydrocarbons development in water areas at drilling horizontal wells.;1 cl