Effective 'Just In Time' Data Integration: The Cased-Hole/Openhole Composite Log

摘要

More data, fewer people, and less time are universal problems in our industry today. There is a continuous search for ways to streamline processes and to improve efficiency. A wealth of data must be rapidly validated and interpreted so that valuebased decisions can be made in a timely manner. In a typical development environment, wells are drilled, formation evaluation data acquired, completions run, cement evaluated, perforations made, and later in the life of the well, additional perforating added. The workflow includes geologists, petrophysicists, reservoir and completion engineers, and well operations personnel. Well log data contains critical information used by various asset team members at different times throughout the workflow. Traditionally, open-hole and cased-hole logs, while representing the same well have been maintained separately, most often because of the differing data-users. In this paper, we demonstrate improvements in workflow efficiency and database quality control by bringing together most of the depth-based well data into a single user-friendly format that can be used by all disciplines. The primary purpose of the cased-hole/open-hole (CHOH) composite log is the correlation between open-hole logs, either LWD or wireline, cased-hole logs, and other depthspecific data. Users of this log select the perforation intervals, write well work orders, complete perforating operations, and expedite hydrocarbon delivery. This composite log saves time, promotes cross-functional understanding, and provides the first step toward an all-electronic interface between reservoir engineering and completions engineering operations. This paper provides a detailed explanation of the process of building the CH-OH composite log and of the benefits realized by engineers, as well as the additional benefit of database quality control feedback for earth scientists in the asset team. We foresee a completely digital workflow in the future in which engineers select perforating intervals from a graphical composite log environment and work requested to the well site.