... ABSTRACT In upstream organizations, formation evaluation products are required by a multitude of subdisciplines in order to achieve their individual objectives. Moreover, some tasks require these products to be provided in real-time, such as geosteering, drilling management and formation...

... contrast caused by lithology and fluid saturation variations across the reservoir (Al-Mudhhi et al., 2005). More recently, as the LWD technology advanced in terms of quality and accuracy, petrophysicists started using it for formation evaluation purposes to derive water saturation from resistivity...

... a straightforward formation evaluation consistent with the complexity highlighted by core analyses. Therefore, after the calibration of the ensemble learner with hundreds of XRD data, high-frequency dielectric and reprocessed nuclear logs, the DDA steps have been successfully applied to about a hundred wells...

... in time. Hence, for each well the RF regressor has been trained and tested on the whole dataset available, obtaining a valid data-driven analytics model for formation evaluation. Next, 1000 scenarios of input logs have been generated via MC simulations using multivariate normal distributions. Finally...

... helps optimize well completion design. reservoir characterization well logging spwla-2021-0055 accuracy log analysis upstream oil & gas thickness drilling data acquisition lwd spwla 62 nd annual logging symposium geological concept formation evaluation doi drilling measurement...

... production monitoring artificial intelligence spwla 62 annual logging symposium nd annual logging symposium density curve quality control formation evaluation computation porosity fnx synthetic density cross-section spwla-2021-0098 production control reservoir surveillance upstream oil...

... guidelines for petrophysicists as independent contributors. The current version of the guidelines covers topics including: General Geoscience and Engineering Operations, Fundamental Petrophysical Data Acquisition, Integrated Formation Evaluation, LWD Petrophysics in Formation Evaluation and Geosteering...

... Abstract Conventional formation evaluation provides fast and accurate estimations of petrophysical properties in conventional formations through conventional well logs and routine core analysis (RCA) data. However, as the complexity of the evaluated formations increases conventional formation...

... methods. X-ray diffraction (XRD) and X-ray fluorescence (XRF) data from cuttings also support the findings. The formation evaluation objective is to quantify the volumes of each mineral and fluid present in the formation. SGR data brings the required additional information to reduce the mineral volume...

... loss control netherlands neutron porosity oil saturation saturation toc structural geology data integration formation evaluation evaluation carbon lithology drilling fluid formulation borehole july 29 porosity computation symposium resistivity spwla 61 june 24 SPWLA 61st Annual...

.... drilling data acquisition lwd laterolog resistivity measurement log analysis upstream oil & gas reservoir characterization well logging resistivity image formation evaluation drilling measurement logging while drilling mud filtrate invasion july 29 inversion june 24 invasion workflow...

... ABSTRACT Core measurements are often employed to detect rock types for improved well-log-based petrophysical evaluation and subsequent formation evaluation in noncored wells. However, acquisition of such measurements can be time-consuming, delaying rock classification efforts for weeks...

... of cased-hole formation evaluation along horizontal wells in unconventional reservoirs, and share lessons learned from an operator's perspective. The cased-hole logging suite includes spectral gamma ray, new-generation pulsed-neutron, and monopole and dipole sonic logs, with objectives to evaluate porosity...

...-in collars have been used to acquire logging-while-drilling resistivity and wellbore image logs in more than ten wells in the Sulige Gas Field, Changqing Oilfield, and Jidong Oilfield, addressing formation evaluation needs in, heterogeneous, low-porosity, or low permeability and other complex reservoirs...

... of conventional well logs, computed tomography (CT) scan/core images, and routine core analysis (RCA) data for simultaneously optimizing rock classification and formation evaluation. First, we perform conventional well-log interpretation to obtain petrophysical properties of the evaluated depth intervals...

... and robust estimate of the petrophysical uncertainty proved beneficial to the construction of a final reservoir model honouring both static and dynamic measurements. well logging petrophysical uncertainty porosity workflow upper limit single workflow Formation Evaluation process input data...

... salinity (one order of magnitude from hundreds to tens ppk). Small tubing in large casing environments, long perforated sections, different fluids in completion make the interpretation even more complicated. The available open-hole formation evaluation represents the input for the pulsed neutron modeling...

... and better vertical resolution but also high-resolution fullbore electrical images, making the tool valuable for formation evaluation and for geology and formation structures characterization while drilling. The availability of detail rich wellbore images obtained shortly after drilling while the formation...

... and different scales of measurement, has been applied and proved essential for formation evaluation in the fractured basement reservoir of the Lancaster Field. Hurricane incorporates drilling parameters, mudlogging data, high resolution gas chromatography, LWD and wireline logs, DST and PLT data to analyze...

... ABSTRACT Shaly formation cation exchange capacity (CEC) is an important parameter in formation evaluation, and in reservoir and production engineering since it is directly related to the type of clays. Currently, CEC is measured in the laboratory, which requires clay preserved core samples...