A method for obtaining hydrocarbon from a reservoir in a subterranean formation can include measuring a poromechanic pressure change due to lithostatic load sharing in the subterranean formation. The poromechanic pressure change can then be mapped to one or more locations within the subterranean formation. Once mapped, the method can identify one or more local pressure peaks in the poromechanic pressure change, wherein each of the one or more local pressure peaks are marked by a pressure escalation and subsequent pressure depletion. The method can then determine one or more regions within the reservoir exhibiting single phase hydrocarbon production.

The invention is a method for exploiting a subterranean formation including hydrocarbons with at least one lithologic facies of the formation having undergone at least one diagenetic phase over geological times. From at least one sample of rock obtained from the formation, from measured production data relating to the formation and from a meshed representation representative of the formation, each mesh of the meshed representation is determined including at least one indicator relating to the distribution of the facies present in the mesh. The method comprises a step of history matching in which at least one of the adjustment parameters is the diagenetic state of the identified facies.

Hybrid 3D geocellular grids are generated to represent a subset of a natural fracture network (NFN) directly in the simulation, while the remainder of the NFN is approximated by a multi-continuum formulation.

Certain implementations of a three-dimensional elastic frequency domain iterative solver for full waveform inversion can be implemented as a method in which frequency domain numerical simulation of elastic waves is per formed in three-dimensional (3D) media.

Certain implementations of a three-dimensional elastic frequency domain iterative solver for full waveform inversion can be implemented as a method in which frequency domain numerical simulation of elastic waves is per formed in three-dimensional (3D) media.

A method and a system for modeling a three-dimensional geological structure. A method may comprise selecting input data from well measurement systems, seismic surveys or other sources, inputting the input data into an information handling system, building a quotient space, projecting constraints to the quotient space, constructing depth functions on the quotient space, trimming against a fault network, and producing a three-dimensional model of horizons. A system may comprise a downhole tool. The downhole tool may comprise at least one receiver and at least one transmitter. The system may further comprise a conveyance and an information handling system. The information handling system may be configured to select an input data, build a quotient space, project constraints to the quotient space, construct depth functions on the quotient space, trim against a fault network, and produce a three-dimensional model of a geological structure.

The subject matter of this specification can be embodied in, among other things, a method for geological modeling includes receiving a forward depositional model, determining a Latin Hypercube Sampling (LHS) stratigraphic model based on the projected forward depositional model, performing forward depositional modeling, transform the forward depositional model from time domain to stratigraphic-depth domain, determining one or more pseudo-wells based on the transformed model, determining a mismatch value based on the transformed forward depositional model and a collection of simulated physical value, and determining a kriging surrogate model based on the LHS stratigraphic model and the mismatch value.

A method is described for property estimation including receiving a seismic dataset representative of a subsurface volume of interest and a well log from a well location within the subsurface volume of interest; identifying seismic traces in the seismic dataset that correspond to the well location to obtain a subset of seismic traces; windowing the subset of seismic traces and the well log to generate windowed seismic traces and a windowed well log; multiplying the windowed seismic traces and the windowed well log by a random matrix to generate a plurality of training datasets; and training a neural network using the plurality of training datasets. The method may be executed by a computer system.

Methods and devices for seismic exploration of an underground structure apply W.sup.2-based full-wave inversion to transformed synthetic and seismic data. Data transformation ensures that the synthetic and seismic data are positive definite and have the same mass using an adaptive normalization. This approach yields superior results particularly when the underground structure includes salt bodies.

Techniques for generating a geological model include identifying a plurality of well data for each of a plurality of wells drilled into a reservoir basin from a terranean surface. The reservoir basin includes a plurality of landing zones formed under the terranean surface, each of the landing zone including a discrete geological layer. The techniques further include comparing the plurality of well data for each well with a reservoir basin database that associates the well data with one of the plurality of landing zones; correlating each of the plurality of wells with a particular landing zone of the plurality of landing zones based on the comparison; and generating a geological model of the reservoir basin based on the correlated wells.