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Minimizing Uncertainty in Geosteering and Log Interpretation in Horizontal Wells

Speaker: John Zhou, Maxwell Dynamics, Inc

Date: Wednesday October 5th, 2016
Time: Presentation starts at 12:00 pm. The meeting room will be open at 11:00 am.
Cost: Free, lunch is not provided, bring your own or purchase nearby. There is a small café on the first floor of the building and a kitchen area near the meeting room.
Address: Weatherford Northside facility, 15710 JOHN F KENNEDY BLVD  Houston, TX, 77032
Parking: Visitor parking is available on the first floor of the parking garage. If the first floor is full, please park on the 2nd floor and above. Please take note of your license plate number if you use the garage.
Sign-in process: When you enter the building on the first floor, sign in at the security desk with your name and license plate number. Take the elevator to the meeting room on the 7th floor. Follow the signage.

Online Registration is required. Capacity: 50


While geosteering or interpreting horizontal wells, we are constantly faced with the challenge of correctly defining the well position with respect to the target reservoir and other geological markers from an often incomplete set of data. This presentation identiļ¬es the uncertainties associated with interpreting the placement of a horizontal well and points to the necessity of introducing geometric models and geologic constraints in the assessment.
The latest generation azimuthal propagation resistivity tools provide the geometric information such as the distance to bed-boundary (DTB) and its azimuthal direction. However, the geometric information is often “buried” deeply inside the measurements, and is difficult to comprehend visually. Until recently, there has been limited capability to independently compute DTB. Furthermore, users may find it difficult to assess the uncertainty in the interpretations presented to them due to a lack of access to the digital logs in many cases. We will examine the azimuthal propagation resistivity technology and present an integrated workflow that provides a comprehensive understanding of its applications.
The contents of this talk are mostly based on two recent papers published by Zhou (2015, TLE) on “Uncertainty in Geosteering and Interpretation of Horizontal Wells – The Necessity for Constraints and Geometric Models” and Zhou, et al. (2016, SPWLA) on “Interpretation of Azimuthal Propagation Resistivity Measurements: Modeling, inversion, application, and discussion”.

Dr. John Zhou is with Maxwell Dynamics, Inc. He received his Ph.D. degree from the University of California at Berkeley and his BS degree from the East China Petroleum Institute. Dr. Zhou served in many professional society functions and positions, including on the SPWLA board as Vice President of Technology for two terms. He was presented the Distinguished Technical Achievement award from SPWLA in 2011.