Geology, geography and global energy

Scientific and Technical Journal

Map of isobars to assess the state of development of offshore fields with horizontal trunks wells great length

2015. №1, pp. 42-50

Semisotova Olga S. - Chief Engineer, Branch of "LUKOJL-INZhINIRING" "VolgogradNIPImorneft", 12 Gubernator Anatoliy Guzhvin ave., Astrakhan, 414014, Russian Federation,

Serebryakova Oksana A. - Senior Lecturer, Astrakhan State University, 1 Shaumyan sq., Astrakhan, 414000, Russian Federation,

This work is devoted to the method of calculating the dynamic formation pressure for building the isobar maps used in the analysis of development the Yu. Korchagin field in the North Caspian shelf. In the process of developing offshore fields with horizontal long-haul wells is necessary to analyze the physical properties of the fluid, temperature and pressure in the reservoir, the productivity of wells and their mutual influence, and especially moving oil-water contact (OWC). For the calculation values of pressure near wells, pressure gradients on the area of the field and are built in these areas of isobar maps, with which average dynamic reservoir pressure can be defined. For operational control of the processes occurring in the reservoir, and regulation of mining is conducted monthly calculation of dynamic formation pressure formula S.Joshi based on filtration characteristics and physical properties of the fluid hydrodynamic studies and variables measured parameters, fished in the well: the flow rate of the well and the bottom hole pressure. This type of work in the development of the field is necessary for analysis of the energy state of sediments, so need regular work to refine the mathematical model of production wells in Northern Caspian fields.

Key words: Северный Каспий, эксплуатационная скважина, горизонтальный ствол, карта изобар, дебит скважины, пластовое давление, анизотропия пласта, скин-фактор, гидродинамические исследования, кривая восстановления давления, Northern Caspian, production well, horizon