... permittivity at these higher frequencies, allows standoff and formation permittivity images to be provided as answer 1 SPWLA-2024-0136 SPWLA 65th Annual Logging Symposium, May 18-22, 2024 products as well. Although images obtained with the next generation OBRMI tools are greatly improved compared...

...SPWLA 65th Annual Logging Symposium, May 18-22, 2024 DOI: 10.30632/SPWLA-202 -0004 THE EVALUATION AND CORRECTION OF PHOTOELECTRIC FACTOR IN THE PRESENCE OF LARGE STANDOFF AND HEAVY MUDS Bair Banzarov, Andreas Vogt, and Nicklas Ritzmann, Baker Hughes Copyright 2024, held jointly by the Society...

... estimation spwla 63 hybrid approach interpretation drilling fluid property drilling fluid formulation permittivity filter cake reservoir characterization artificial intelligence fluid loss control resistivity image fracture resistivity rd annual logging symposium standoff basement...

... examples are given from unconventional online from May 17-20, 2021. wells to demonstrate that the inverted standoff image can reveal fractures when there is insufficient or even no ABSTRACT contrast in medium properties. The inverted standoff image also serves as a diagnostic tool for interpreting A new 2...

... images as well as a standoff image. The results have been provided from both the controlled experiments in the test fixture and from field logs. INTRODUCTION In the late 1960s, the first borehole imaging tool was introduced, which eliminated the necessity for "transparent mud" through the use...

... fluids and materials structural geology upstream oil & gas resistivity image oil-based mud july 29 log analysis hydraulic fracturing drilling operation wellbore seismic standoff image standoff permittivity symposium fracture drilling-induced fracture open fracture fractured reservoir...

... log analysis Artificial Intelligence machine learning neural network permittivity mud property Upstream Oil & Gas higher frequency standoff image permittivity image standoff interpretation formation permittivity image dataset well logging frequency spwla 60 inversion...

..., with part of the wave reflected from the formation surface. By analyzing the travel time of the pulse wave from transmitting to the echo being received, the transducer standoff, and therefore borehole radius, can be derived given the fluid sound speed. Analysis of the amplitude of the echo signal enables...

... sensors. The new tool is introduced along with the key design features that overcome the challenges associated with LWD imaging in oil-base mud. Sensors are positioned on the rotating drill collar with resulting standoff between the sensors and the formation. For the resistivity image, the tool's...

... Upstream Oil & Gas sensitivity neutron porosity apparent porosity neutron migration length flux epithermal Symposium standoff log analysis detector porosity Porosity Tool reaction well logging generator spwla 58 porosity sensitivity am-be source neutron generator source...

... source drives with short transmitter- receiver spacing for maximum formation signal, without interference by tool collar modes. The tool has a high resolution focused pulse echo transducer that fires every 2 ms used to generate ultrasonic standoff and amplitude measurements. It also has two orthogonally...

... and imaginary parts of the impedance. According to the acquired real part impedances, static and dynamic images are generated to provide a clear indication of the formation resistivity distribution around the borehole. In turn, imaginary parts of impedances permit an image of standoffs, which accompanies...

... the inversion, we use a sequence of inversion runs to first iteratively estimate the mud properties for a small depth section of the log; this estimate is then used to invert for the button standoff and the formation resistivity and permittivity for longer data sections. dielectric permittivity...

... and test-pit data to appraise environmental effects related to diffusion, tool standoff, borehole fluid, and borehole size. To assess the potential of multidetector Sigma logs, we compute radial invasion profiles for a wide range of formations under typical LWD drilling conditions. Finally, a comparison...

... detector gamma ray 75-inch tool density measurement Upstream Oil & Gas formate brine invasion effect formate mud well logging Brine porosity standoff response log analysis potassium correction count rate borehole fluid spwla 53 invasion depth Symposium invasion standoff...

... workflow Symposium curtain-section plane density image inversion well logging inversion-based workflow boundary interpretation reconstruction comp image azimuth final formation model formation model borehole geometry high-angle inversion standoff SPWLA 53 rd Annual Logging Symposium, Jun...

... with a resolution of 0.25 in. over a wide range of standoffs. The paper presents the tool performance during field tests juxtaposed against modeling and laboratory experiment results, and discusses tool specifications and limitations of the technology. It also provides suggestions of various ways in which...

... Field placement standoff azimuthal resistivity measurement horizontal well Norway saturation resistivity Symposium resistivity measurement SPWLA 51st Annual Logging Symposium, June 19-23, 2010 1 DETERMINING THE OIL-WATER CONTACT WHILE DRILLING ABOVE THE TRANSITION ZONE IN LONG HORIZONTAL...

... resistivities. Since the signal has to cross the mud gap, the standoff to the borehole wall has some influence especially in boreholes with large rugosity. Numeric simulation methods have greatly improved and accelerated over the last decade and are now used to optimize sensor geometry. Qualification...

.../fiberglass composite housing. Bowsprings are used to eccentralize the tool and force this sensor against the borehole wall, mitigating its sensitivity to tool standoff. The MSS also incorporates a low-resolution (40 cm) sensor modified from a susceptibility logging sonde developed at the University of Munich...