Petrophysics and Geophysics have not always worked in the past as closely together as one might expect. This paper discusses current advances, and sketches future developments. The major objective of Geophysical Research was to obtain sharper pictures. With the advent of 3-D seismic, there is a strong trend to make displays both in time and depth, and to convert seismic attributes into rock pro...

Due to the complexity of sedimentary and diagenetic processes, natural rocks generally exhibit strong heterogeneity in mineral composition, physicochemical properties, pore structure. Currently, 3D printed (3DP) rock analogs fabricated from sandy materials (silica sand) are widely applied study petrophysical geomechanical characteristics reservoir rocks, which provides an alternative novel appr...

Downing, B.D., B.A. Bergamaschi, D.G. Evans and E. Boss. 2008. Estimating source-specific contributions of DOC into a drinking-water reservoir using optical profiling. Lake Reserv. Manage. 24:381–391. Understanding the sources of dissolved organic carbon (DOC) in drinking-water reservoirs is an important management issue because DOC may form disinfection by-products, interfere with disinfection...

NMR well logging of petroleum reservoir require the measurement of the NMR response of water, oil, and gas in the pore space of rocks at elevated temperatures and pressures. The viscosity of the oil may range from less than 1 cp to greater than 10,000 cp. Also, the oil and gas are not a single component but rather a broad distribution of components. The log mean T1 and T2 relaxation time of dea...

Reliable and sufficient welltest data is necessary for the evaluation of reservoir properties and well performance. Best results a r e usually obtained by monitoring downhole pressure and flow rate continuously during a transient test. However, a recurring problem for geothermal welltests has been the failure of the downhole pressure instrument in the high temperatures and hostile environments,...

The borehole wall stability of depleted reservoirs is a key problem that restricts the deeper potential exploitation old oilfields. Based on these, according to seepage and elastic mechanics theory porous media, combined with laboratory rock experiments, dynamic evaluation model geomechanical parameters reservoir established, this basis, method wellbore new wells in changing laws influencing fa...

Kalman filter-based methods have been widely applied for assimilating new measurements to continuously update the estimate of state variables, such as reservoir properties and responses. The standard Kalman filtering scheme requires computing and storing the covariance matrix of state variables, which is computationally expensive for large-scale problems with millions of gridblocks. In the ense...

The observatory of transfers in the vadose zone (OZNS-France) offers a unique support for characterizing Beauce limestone aquifer at various spatial and temporal scales. This consists large well associated with external boreholes dedicated to imaging, monitoring, understanding mass heat through zone. An initial geological characterization core samples gave valuable information on facies encount...

Flow unit characterization plays an important role in heterogeneity analysis and reservoir simulation studies. Usually, a correct description of the lateral variations of reservoir is associated with uncertainties. From this point of view, the well data alone does not cover reservoir properties. Because of large well distances, it is difficult to build the model of a heterogenic reservoir, but ...