Method of Energetic Interconnected Junction of Large-Scale Inflow to SmartWells Constructed in Elaborated Reservoirs

Abstract

Introduction There are few people who have doubts concerning the important role of crest faults in migration and formation of oil/gas deposits. The increased fracturing and vags capacity in these zones creates the useful space which under favorable conditions that serves as subsurface storage of hydrocarbons (HC). Complex phase trajectories with the development of fractured reservoirs by numerous wells and rock pressure (stresses) related to them and the seismic emissions of condensed matrix cannot be described by parabolic equations of geological-hydrodynamical simulation. The geophysical and the related hydro-dynamic fields of HC genesis and accumulation, facies and phase borders of porous space in well inflow cases are characterized by the following general abnormal features: Complicated self-organizing feature of scaled macro-world/micro-world space with no strict structural monitoring; Fluctuations of inflow profiles from zero up to several hundreds of cubic meters per day, that are not coordinated to low porosity and permeability values; Restrictions of deposits by faults, replacements, tidal wave depositions, condensation, and for the wells - by segments with zero inflow from low-permeable, stagnant zones with jammed capillaries and counter-flow impregnation; Tangential pressures, non-equilibrium temperature, viscosity and difficulty (sometimes impossibility), inversion in saturation and pressure, defining the OWC; Convectual/diffusional shear deformations, non-equilibrium lithology, suffusion. We submit two ways for decisions with multi-scaled regional task: «on a flow basis» from a well towards petro-physics and from lithology of rock space - to a well, by methods of evolutionary transformation of the equations for mass preservation up to energy-steady solutions of Navier-Stoks's equation. We have received analytical and numerically integrated decisions on the interaction of rock pressure (stress) inside the porous space and viscous drain of a well. Theoretical Substantiation of a Problem The forecasting of saturation character for sedimentary HC traps is one of most complicated items inn seismic exploration, geo-physics and geological hydro-dynamic modeling of deposits as well as the processes of their development. The problems while simulating these systems is related to the arrangement of various areas inside the formation, which act differently with the actions applied towards them, depending upon the stage of development. With this in mind the model of interaction it substantially different depending upon the type of effect and the distance from the center of this effect. As a result the actual behaviour of the system deviates from model one, giving the solutions that are "asymmetrical?? in specific models.

Geo-informatics of multi-scale solutions in Navier-Stokes equations for deformed porous space

“…On a pliable surface with due account for cross displacement of a non-extendible membrane solutions was obtained by G.F. Trifonov (1978). For sheared layer of seismic emission in porous media the solution will be defined by the mixed boundary conditions at η=0, taking into account both cross and longitudinal displacements of deformations [19][20][21][22][23][24] u=∂ξ 1 The task to determine the kinematic and dynamic characteristics of multi-layered viscoelastic sheared layer subject to normal pulse-type loads of pressure is arranged as follows [6,[20][21][22][23], Fig. 3.…”

“…The profile of mean velocity U(η) is set on the basis of a principle of maximal stability for mean characteristics received after resolution of a system of linear differential equations (21)(22)(23)(24)(25)(26), proceeding from approximation in viscous sub-layer U(η)= η.…”

“…The multi-scale phenomena of geological search, exploration and development are diagnosed, supervised and managed by a system of electro-magnetic, hydro-dynamic, geo-physical gauges, instantaneous energy principles of thermal, electric and magnet-resonance show [24]. Adjusted for critical energy speed of choke-type water and gas breakthroughs, the diffusive filtration, dynamic counter-flow valves weaken or completely block the inflow displacement agent into water-cut sectors, thus equalizing the inflow profile and preventing negative consequences of interface structural arrangement and give the rise in skin-factor for zone heterogeneity.…”