Assessment and evaluation of degree of multilateral well's performance for determination of their role in oil recovery at a fractured reservoir in Iran

Current drilling costs may exceed more than million dollars for each well; therefore designing a well completion, which can increase production, is essential. Multilateral well is a well completed in two or more zones, also has a great potential to optimize oil well production. The first goal of such wells is to improve the primary recovery through increasing the reservoir exposure. The rate of development of multilateral wells in the petroleum industry has been increased in the recent decades. In addition to this, recent advanced technological tools have made enough flexibility for developing complex multilateral wells. Since the challenge is becoming a question not of whether a multilateral system is available, but rather a question of what type of multilateral, if any, is the best suited to the reservoir and production demands. The object of this study is to develop an integrated completion-planning approach, based on the current global and broad experience. In this research the role and performance of 2 kinds of multilateral wells are considered these are identified in this research as planar dual-lateral and dual opposite laterals, then their performance to enhanced oil production in one of the fractured reservoirs of Iran, in ILAM formation, is compared.