Geology, geography and global energy

Scientific and Technical Journal

Natural and geodynamic processes during on shore and shelfРѕre areas of the seas

2014. №3, pp. 183-187

Ushivtseva Lyubov F. - C.Sc. in Geology and Mineralogy Associate Professor, Astrakhan State University, 1 Shaumjan sq., Astrakhan, 414000, Russian Federation,

Sharova Oksana A. - Post-graduate student, Astrakhan State University, 1 Shaumjan sq., Astrakhan, 414000, Russian Federation,

Oil and gas development, offshore and onshore causes a number of technological engineering-geological processes: the subsidence of the surface above the reservoir induced seismicity induced earthquakes, deformation of structural elements, casing pipes, pipelines. This is due to the natural stress state of rock mass during drilling, intensive fluid, discharge into subsoil waters and industrial wastewater pumping, activation of tectonic movements, frac, technology failure operation of facilities and other factors. In world practice there are many cases of subsidence of the ground surface above the developed deposits, emergency open emissions fluids, technogenic earthquakes, provoked intense fluid, the appearance of induced seismicity, cutting and deformation of casing strings, the emergence of annular pressure, the formation of technogenic deposits in the overlying sediments gusts of oil pipelines. A particular danger when developing represents deposits with complicated structure formation fluid as the Astrakhan gas condensate field with abnormal deposits of sea areas. Development of offshore deposits in the Caspian is today a priority task that requires the use of the newest technologies of prospecting, exploration and security of the ecosystems of the Caspian shelf. In this connection, a study and monitoring the above anthropogenic processes is essential to ensure the safe development of hydrocarbon raw materials.

Key words: шельф, месторождения нефти и газа, разработка, сейсмичность, оседание поверхности, деформации, техногенные землетрясения, геодинамические процессы, мониторинг, экосистемы Каспия, shelf, oil and gas field, development, seismicity, subsidence and deformatio