Abstract
Finding appropriate amounts and types of hydrocarbons and the proper and economic way to extract them to surface will be a formidable challenge over the next decades. The use of new technology & resources to brought economic life to oil fields will be a key too in the intent to recover hydrocarbons out.
In order to reach these objectives, different types of tools and operations that years ago were impossible to do have been planned and executed. Geological uncertainties and wells proposed to reach deeper targets on high pressure and high temperature (HPHT) environments give drilling engineers the challenge to work with new technologies in order to reach an economic way to do it.
The Huacaya structure comprises part of the Bolivian Sub Andean. The structure lies at north of Margarita structural trend, discovered in 1998 by the MGR-X1 well. Three additional wells, MGR-X2, MGR-X3 and MGR-4, had been drilled and completed during 1999, 2000 and 2004.
The HCY-X1 well is located 350 km south of Santa Cruz de la Sierra and 12.4 Km North of MGR-4, the closest well of Margarita Field. The target location is placed 750 m to the North of the Margarita Exploitation area boundary (Figures 1 & 2)
A detailed prognosis with formation tops and the casing program are described in Table 1 & 2.
The purpose of the paper is to analyze the difficulties to drill the Carboniferous formations (Taiguati, Tarija, Itacuami and Tupambi) in previous wells, the experienced obtained with the use of impregnated bits with turbine compared with traditional drilling systems and the results of the trial.
