.... Figure 7 shows the model with anisotropic resistivities, the survey plan and the resistivity logs used to derive the resistivities. Instrument pictures are shown at the top (after Barajas-Olalde et al., 2021 ). Figure 7 Geoelectric model (3D anisotropic) and survey plan for the CO 2 monitoring...

... Abstract Logging-while-drilling (LWD) ultra-deep resistivity technology can explore the reservoir on a similar scale to seismic, so interpreted resistivity models can be combined with seismic sections to enable oil field operators to delineate pay zones better, improve reservoir understanding...

... and recorded data. All inversion results show uncertainty in the exact position of formation/fluid boundaries and inverted resistivity values. Understanding this uncertainty and deploying multiple inversions to mitigate it is essential for attaining high confidence in the quality of results. Multi-antenna...

.... Automating log interpretation is a complex task, but solvable given a known environment. As an engineering problem it must be split up into multiple smaller tasks that can be independently solved and when combined, solve the greater task. Logging while drilling (LWD) deep azimuthal resistivity data is run...

... Figure 1 Hydrocarbon proven of Low Resistivity Low Contrast (LRLC) reservoir in the South Sumatra working area Conductive Minerals As previously explained, the presence of hydrocarbons is characterized by a high resistivity log reading. On the other hand, the higher the log RHOB...

... of the effective diffusion coefficient of D 2 O and the bulk diffusion coefficient of D 2 O were used to compute the diffusional tortuosity. To measure electrical tortuosity, the samples were resaturated with 2.5% KCl brine prior to immersion into 6% KCl brine. The measurements of the samples’ resistivities...

.... On the other hand, the ANN model was developed and tested using well log inputs such as porosity, gamma ray, and resistivity logs. Results showed that the accuracy of the machine learning model outperforms that of the rock physics model in the prediction of the P-wave velocity. In particular, a correlation...

... productive zones, it is critical to understand the results and have high confidence in them. The second tool in the BHA, the established azimuthal resistivity tool, provided an opportunity to directly compare the azimuthal data with the inversion result from the new tool to critique the inversion results...

... to be calculated by Archie's equation. The porosity of the tight carbonate of Qixia formation is usually lower than 5%, and the low porosity has raised issues in the petrophysical analysis of the water saturation ( Zhao et al. 2017 ; Li et al. 2019 ). Besides, induction resistivities can be limited in an oil...

... around 27 pu ranging from 18 to 35.98 pu, permeability around 2036mD ranging from 60 to 10615mD. Its hydrocarbon type is heavy oil with an in-situ viscosity between 50-200cp ( Shi., 2018 ). Among GuanTao formation, L62 sublayer develops a large scale of low resistivity pay as result of a higher content...

... Abstract The purpose of this paper is to present the equations about intrinsic formation factor (F) developed from a series of experimental data that will provide a method to recognize both the additional conductivity and resistivity of the rocks. In the experiment, 14 pieces of core plugs...

... Abstract Deep directional resistivity logging-while-drilling technology and its measurement processing are instrumental in strategic well placement, landing, geosteering, and reservoir understanding. However, since the measurements are truly at the reservoir scale, reservoir complexities limit...

... Abstract Deep directional resistivity LWD measurements have been shown to be sensitive to resistive transitions over a broad range of distances around the tool from tens to hundreds of feet. These detected transitional surfaces are primarily used to detect formation resistivity boundaries...

... that the standardresolution petrophysical logs were insufficient to accurately evaluate this low-resistivity, low-contrastreservoir. The presence of salt intrusions compromises the surface seismic interpretation and poseadditional geological challenges, adding uncertainty to the oil water contact—which...

... resistivities cannot match that of the 2-foot array induction resistivity. Sometimes large apparent anisotropy can be seen in high-resistivity clean sands, which has caused confusion in data interpretation and reserve evaluation. Researchers have long known that triaxial induction data contains high-frequency...

... upon the combination of an ultra deep resistivity tool with a previously unattempted benchmarking scenario for a look around inversion. Drilling a trajectory of 45° inclination in order to proactively identify the oil water contact (OWC) in the far field below, and confirm this forecast with an actual...

..., a reliable source for fracture length data would greatly reduce the high uncertainties associated with fractured reservoir characterization. In this study, we present a method that categorizes fracture length using laterolog-type resistivity and electrical borehole image logs, based on the different...

... application resistivity artificial intelligence tracer analysis system october 2020 petroleum engineer Introduction Tracer technology is an effective monitoring and surveillance tool that has a wide range of applications in many disciplines including petroleum, chemical, hydrology...

... Oil & Gas coefficient drqi resistivity production performance Introduction Effective reservoir performance prediction depends on utilizing different approaches that balance natural geological complexity with practical reservoir-engineering challenges. As resources and reserves...

..., they often cause some deviations. Therefore, in this work, we combine cores and well logs together to provide a more accurate guideline for estimation of total organic carbon, which is primarily of interest to petroleum geochemists and geologists. Our work is based on Archie's equation. Resistivity log...