The Ottoman Age of Exploration by Giancarlo Casale

Coiled tubing minimized the hydrate issues from production start up until stable gas flow was reached. Therefore, special inhibitors at high concentrations were introduced in stimulation fluid and during wellbore cleanout and kickoff. Gas wells of Chayandinskoye field have a potential to form gas hydrates at formation conditions. The coiled tubing fleet made several runs for frac port manipulation, wellbore cleanout of debris and residual proppant, and well kickoff until production achieved the natural flow regime. This completion makes possible to get separate or combined inflow from producing layers. liners, equipped with three frac ports that allow multiple opening and closing. The well completion configuration combined 6-5/8- and 4-1/2-in.

The project is one of the first gas fracturing campaigns in Eastern Siberia. Coiled tubing was involved in operating controllable frac ports, well kick-off and inflow profile recording using proprietary technologies. A multistage stimulation campaign was executed to test the efficiency of hydraulic fracturing in subhorizontal multilayer well. One of the prospective options is to implement hydraulic fracturing in low-permeability areas of the Chayandinskoye. Geological properties of the formations vary significantly, and it is necessary to define appropriate methods of well construction and completion prior to switching to a field. The field is currently in the exploration stage. In particular, producing formations of the Chayandinskoye field have extremely low temperatures 46 -55° F (8 to 13☌). The geology of Eastern Siberia formations is unique.

The Ottoman Age of Exploration by Giancarlo Casale