Systematic Uncertainty Analysis of Reservoir Image from New Generation LWD Azimuthal Resistivity Measurements

2018 ◽  
Author(s):  
Qiuyang Shen ◽  
Jiefu Chen ◽  
Hanming Wang
Keyword(s):  
Uncertainty Analysis ◽  
Systematic Uncertainty ◽  
Resistivity Measurements ◽  
Azimuthal Resistivity ◽  
New Generation

Maximizing Net Pay in Penta-Lateral Well With Advanced Proactive Geosteering and 2D Structural Analysis Using Azimuthal Resistivity Measurements

2021 ◽  
Vol 62 (3) ◽  
pp. 311-330
Author(s):  
Yuriy Antonov ◽  
◽  
Dmitry Kushnir ◽  
Sergey Martakov ◽  
Jhonatan Pazos ◽  
...  
Keyword(s):  
Uncertainty Analysis ◽  
Real Time ◽  
3D Visualization ◽  
Service Level ◽  
Appropriate Technology ◽  
Time Data ◽  
Unique Challenge ◽  
Geological Interpretation ◽  
Resistivity Measurements ◽  
Azimuthal Resistivity

A unique challenge for ongoing Schrader Bluff development is to increase field production with the drilling of a high-angle, multilateral producer. To address the challenge, a project was initiated with the primary goal to safely drill five laterals with a key emphasis on maximizing net sand exposure while balancing the short- and long-term value associated with selecting the appropriate technology. This paper focuses on the technical aspects of the proactive geosteering with azimuthal resistivity measurements and multilayered user-guided inversion used in this project. The prewell study based on multiple offset wells is discussed in detail, followed by presenting the highlights of the real-time drilling/geosteering operations, and concluded with the comprehensive post-well analysis study after all five laterals were drilled. The key effort before the drilling was thorough simulation of various scenarios for several target formations. It allowed the selection of the proper geosteering service level (tools and data inversion methods), providing required resolution capabilities but not exceeding the project budget. Value of inversion on real-time data is demonstrated with several examples accompanied by uncertainty analysis of inversion results. Post-well processing included quantification of the main fault amplitude, in-depth uncertainty analysis, and 3D visualization, as well as geological interpretation using an advanced 3D modeling application. The final position and orientation of the major fault were supported with the results of 2D inversion performed in the vicinity of the fault. The integration between advanced geosteering tools and an active team effort helped achieve this complex penta-lateral well, drilling all legs with excellent directional control with numerous steering adjustments and a final net pay of 20,455 ft out of 28,886 ft drilled, which exceeded the operator’s expectations.

Investigation of borehole effects on azimuthal resistivity measurements using novel pseudo‐analytic formulas

2019 ◽  
Vol 68 (2) ◽  
pp. 709-720 ◽  
Author(s):  
Decheng Hong ◽  
Hu Li ◽  
Wei‐Feng Huang ◽  
Hongmei Liu
Keyword(s):  
Resistivity Measurements ◽  
Azimuthal Resistivity

scholarly journals Algorithm for inversion of resistivity logging-while-drilling data in 2D pixel-based model

2021 ◽  
Vol 2099 (1) ◽  
pp. 012040
Author(s):  
A V Bondarenko ◽  
D Yu Kushnir ◽  
N N Velker ◽  
G V Dyatlov
Keyword(s):  
Technical Problem ◽  
Integral Equation Method ◽  
Time Inversion ◽  
Suggested Approach ◽  
Resistivity Measurements ◽  
Environment Model ◽  
Marquardt Algorithm ◽  
Resistivity Logging ◽  
Azimuthal Resistivity ◽  
Volume Integral Equation Method

Abstract Multi-frequency and multi-component extra-deep azimuthal resistivity measurements with depth of investigation of a few tens of meters provide advanced possibilities for mapping of complex reservoir structures. Inversion of the induction measurements set becomes an important technical problem. We present a regularized Levenberg–Marquardt algorithm for inversion of resistivity measurements in a 2D environment model with pixel-based resistivity distribution. The cornerstone of the approach is an efficient parallel algorithm for computation of resistivity tool signals and its derivatives with respect to the pixel conductivities using volume integral equation method. Numerical tests of the suggested approach demonstrate its feasibility for near real time inversion.

A Systematic Uncertainty Analysis of an Evaluative Fate and Exposure Model

Risk Analysis ◽  
2000 ◽  
Vol 20 (4) ◽  
pp. 439-454 ◽  
Author(s):  
Edgar G. Hertwich ◽  
Thomas E. McKone ◽  
William S. Pease
Keyword(s):  
Uncertainty Analysis ◽  
Systematic Uncertainty ◽  
Exposure Model

scholarly journals Calibration procedures and uncertainty analysis for a thermal mass gas flowmeter of a new generation

Measurement ◽  
2016 ◽  
Vol 89 ◽  
pp. 280-287 ◽  
Author(s):  
F. Cascetta ◽  
G. Rotondo ◽  
A. Piccato ◽  
P.G. Spazzini
Keyword(s):  
Uncertainty Analysis ◽  
Thermal Mass ◽  
New Generation
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