... ABSTRACT The implementation of waterflooding projects in mature hydrocarbon fields poses significant challenges in effective water management and unlocking untapped reservoir potential, especially in secondary reservoirs. As hydrocarbon fields mature, the optimization of production becomes...

... acquisition annual logging symposium khz transverse inversion reservoir sedimentology well logging reservoir characterization th annual logging symposium brazil resistivity petrobras receiver detection frequency three-dimensional reservoir mapping-while-drilling system ABSTRACT Marlim...

... sedimentary rock geologist structural geology well logging geological subdiscipline salt tectonics log analysis th annual logging symposium cutoff petrobras frequency spwla 65 integrating statistically significant laboratory information reservoir rock type annual logging symposium...

... clastic rock mudrock sedimentary rock reservoir geologist complex reservoir shale gas well logging reservoir characterization reservoir geomechanics saturation th annual logging symposium spwla 65 prediction shale reservoir gulf sandstone mudstone swt resistivity substitution...

... ABSTRACT The Thomas-Stieber method has been widely used to evaluate thin-bedded clastic reservoirs by accounting for the distribution of clay minerals within the rock matrix. In such reservoirs, clay content has a profound impact on porosity and, consequently, hydrocarbon storage. However...

... ABSTRACT The accurate determination of formation water salinity is crucial for petroleum exploration and development as it plays a significant role in determining reservoir parameters. In particular, salinity determines the Sigma value of formation water in pulsed neutron capture logging...

... ABSTRACT With the development of unconventional reservoirs and continuous advancements in production technology, fracturing has emerged as a crucial method to enhance oil and gas production in tight reservoirs. Unconventional reservoirs typically possess low porosity and permeability...

... ABSTRACT Well-placement techniques have been evolving in recent years to improve reservoir exposure and optimize well placement. While the traditional reactive geosteering methodology in thin reservoirs has improved reservoir exposure, it cannot anticipate sudden dip changes and potential...

... ABSTRACT Logging-while-drilling (LWD) ultra-deep azimuthal resistivity (UDAR) tools became an essential part of well placement technology because they are deep enough to explore the reservoir as a whole and map it in a similar scale with seismic sections. Due to the large formation volume...

... of the pulsed-neutron tool are often reconcilable and may carry additional information about the state of the well or reservoir. With respect to verification of containment, depending on well configuration, it may be possible to differentiate between CO 2 in the formation and CO 2 in the annulus...

... ABSTRACT The sandy conglomerate reservoir has a wide distribution in Bahai Bay Basin, which has become one of the most important exploration targets. However, characterization of reservoir connectivity is quite difficult due to strong reservoir heterogeneity and complex logging responses...

... ABSTRACT The recently discovered B19-6 basement reservoir of Bozhong Sag in Bohai Bay Basin is a proven condensate gas reserves over 100 billion cubic meters. It is the largest deep buried condensate gas field discovered in the metamorphic basement with a gas column of over 1000m. Clear...

... ABSTRACT Breidablikk is a green field on the Norwegian Continental Shelf and just started the pre-production drilling of 23 wells in two structures. We have two reservoir fluid samples from exploration wells in each structure with relatively high viscosity of 4 cP and 8 cP, respectively...

... resonance (NMR), FS is used to eliminate the hydrocarbon (HC) contribution from T 1 and T 2 distributions and thus to establish the pure response of a water-filled rock. In 2015, Christensen et al. presented the first study conducting successful FS for a chalk reservoir. Based on theoretic...

... ABSTRACT The evaluation of drilling fluid damage to reservoir is an important work for reservoir protection and oil and gas exploitation. This paper discusses the damage degree of drilling fluid to tight sandstone gas reservoir. In this paper, an indoor drilling fluid reservoir damage...

... effects can artificially increase water saturation (Sw) estimations by 20 saturation units (s.u.) in the Barik reservoir, resulting in pessimistic estimates of hydrocarbon pore volume if no corrections are applied. The Barik sandstone reservoir, which is characterized by low porosity (up to 14pu), low...

... and future wells. Advancement in tool design and inversion algorithms has allowed mapping the reservoir in 3D and exploring the sensitivity of these tools ahead of the measure point to provide look ahead warning of resistivity boundaries. Improvements in the technology over the decade have changed the way...

... if the as-acquired deep resistivity is used in volumetric calculations. Overbalanced drilling causes deep invasion of waterbased mud (WBM) filtrate into porous and permeable rocks, leading to radial displacement of in-situ saturating fluids away from the wellbore. In low-porosity reservoirs drilled with WBM...

.... In this paper, the authors will review the use of UDAR in Equinor the last decade and highlight both successful use and real-time challenges related to interpretation of the inversion results. UDAR-technology and inversion algorithms have been very powerful for reservoir mapping to geosteer or geostop according...

... interpretation method of log data is based on petrophysical mechanisms and models, many assumptions are needed, which may lead to deviations in practical application. Therefore, it is of great significance to achieve reservoir fluid identification when using machine learning processing and interpreting log data...