Development Of An Electro-Opto Logging Cable And Video System For Offshore And Other Downhole Applications

Abstract

This papar was salected for fxasentatlon by the OTC Proaram Committae following raview of Information oontained in art absfraot submkfad by the authorfs). Contants of the oaoer, as presented, have not baen"raviawed by the Offshora Te~hnology Confatance an~are subjaot to curreotlon by tha author(e), The material, as preeented, d"&$ not neceaaarily;ejleã ny poeitlon of the Offshore Technology Conference or he offloers. Permission to oopy Ie rastrkted 10an abstract of not more than 300 worde, Illustration may not be copied. The alxlracf should contain rmnspkuous acknowledgment of where and by whom the paper [e presented. AbstractOver the years, oil and gas well operators have been able to develop soiutions to practically all problems that occur downhole. The difficulties and expense incurred in the implementation of these solutions, however, can be significantly multiplied when the problem is incorrectly identified.Before the development of real-time downhole video systems, identification of downhole problems usually involved interpretation of well performance with electronicallycollected data, or in some cases, the use of lead impression blocks. Misinterpretation of data often resulted in unsuccessful repair operations. Real-time downhole video eliminated many of the problems by allowing the operator to view actual downhole conditions in real time and accurately identify problems.However, operational difficulties experienced with earlier systems that employed coaxial cable prevented widespread usage of the systems. This paper will describe the development of a smalldiameter electro-opto cable for downhole video use that overcomes many of the operational limitations experienced with earlier cable designs. The discussion traces the cable through several iterations of Referencesand illustrationsat end of paper. development to its final form. The broadened scope of downhole video service applications that have resulted from the development of a state-of-the-art smalldiameter electro-opto cable and other camera enhancements will also be presented.The paper will conclude with three case histories of successful video logging jobs made possible by the small diameter cable and enhanced equipment capabilities.

Downhole Video Services Enhance Conformance Technology

“…4 To address these limitations, several the recent enhancements have been made to DRY systems as follows:…”