Far reach horizontal well intervention and logging

By using an integrated fibre optic cable in the carbon rod both as a sensor and to transmit data, we seek simultaneous measurements of pressure, temperature, and acoustic signals throughout the entire length of complex wells (distributed measurements). Ba sed on the measurements we seek to increase understanding of well and reservoir characteristics. The cost of the service must be competitive to production logs on wireline with tractor or coiled tubing, which are not able to serve this market. Our propos ed idea to reach the primary objective is to develop a modular system (Z-system) consisting of surface equipment, a sectioned carbon rod, sensors, and interpreters. The rod section in the horizontal part of the well should ideally float in the oil-water-g as mixture present in order to reduce friction forces, while the rod section in the vertical part should be stiff and strong enough to avoid buckling and breaking under extreme compression. Separate sections need to be spliced together using designated co nnectors. In all sections, a fibre optic cable provides a way of measuring distributed signals from the entire length of the rod and therefore the well, while electrical conductors should ensure high current output for logging and intervention tools. In t his way all necessary operations can be done in one run. The underlying idea of this R&D project is for Ziebel to realise a highly efficient and reliable modular technological solution that will increase and maximize well recovery rates for the oil compa nies by providing extended reach (20-30% increase) and a better reservoir understanding.