--> The Resistivity Imaging LWD Method Suitable for Oil-Based Drilling Fluid
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Petroleum Previous HitDrillingNext Hit Techniques, Issue 1, 2019

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The Resistivity Imaging LWD Method Suitable for Oil-Based Previous HitDrillingNext Hit Fluid

ZHANG Wei1,2, LU Baoping1,2, WANG Baoliang3, LI Xin1,2, LU Junyi3, and JI Haifeng3


1State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing, 100101, China;
2Sinopec Research Institute of Petroleum Engineering, Beijing, 100101, China;
3State Key Laboratory of Industrial Control Technology (Zhejiang University), Hangzhou, Zhejiang, 310027, China


– Petroleum Previous HitDrillingNext Hit Techniques, Issue 1, 2019,

Posted: May 21, 2019

Abstract

The goal of this study was to solve the problem of Previous HitdrillingNext Hit fluids blocking circuits and losing signal during the Previous HitloggingNext Hit process. Oil-based Previous HitdrillingNext Hit fluids are prone to blocking the DC circuit and hence invalidating conventional resistivity when using the LWD method. In order to solve this problem, researchers proposed implementing the capacitive coupling-based non-contact conductance detection technology with a resistivity imaging LWD method suitable for oil-based Previous HitdrillingNext Hit fluids. This paper summarized the main methods of resistivity measurement Previous HitwhileNext Hit Previous HitdrillingNext Hit, and introduced the principle and characteristics of capacitive coupled non-contact conductance detection technology. The azimuth Previous HitloggingNext Hit simulation model for oil-based Previous HitdrillingNext Hit fluids was established by combining capacitive coupling principle and inductive coupling principle. Then, the Previous HitloggingNext Hit simulation experiment under various working conditions was carried out with this model, and the relationships between the circumferential position and current amplitude, circumferential position of electrode and the current phase, as well as the imaging principle of button electrode were analyzed. The simulation results showed that the button electrode had azimuth detection capability, and the proposed Previous HitloggingNext Hit method was feasible. A surface simulation Previous HitloggingNext Hit system was designed to carry out the indoor test of azimuth Previous HitloggingNext Hit. The test found that this Previous HitloggingNext Hit system may to achieve formation imaging and measure the formation dip angle, and the relative error between the test result and the actual formation dip angle is only 4.7%. The study showed that the proposed resistivity imaging LWD method is able to perform lateral resistivity measurements Previous HitwhileNext Hit Previous HitdrillingNext Hit in oil-based Previous HitdrillingNext Hit fluids, and make the measured resistivity imaging to obtain the reliable Previous HitloggingNext Hit results.

2019 AAPG Datapages/Search and Discovery Article #130006 © 2019 Petroleum Previous HitDrillingTop Techniques, Issue 1, 2019