Application of Horizontal Wells for the Development of Complex Reservoirs with Gas Cap and Bottom Water

Srednebotuobinskoe oil and gas-condensate field is one of the giant fields in East Siberia (Russia) that is developed since 2013. Main production target is botubinskiy horizon named layer Bt which is consists of terrigenous sediments and it differs by monolithic structure with wide gas cap and bottom water. There is no barriers between saturation zones of the field. Therefore all the reserves of the field are contact. The key solution of the development of reservoir Bt is application of horizontal wells. After start of the pilots in the the gas-oil- water zone (GOWZ) of the field the primary problems have appeared at the well performance. They were gas coning and early gas breakthrouhg to the bottom well. On the pilot stage there is no the conseption of geometry well and selection of well operation coditions. It is presented in the article the justification of the approach to the gas-oil-water zones development of the field by horizontal wells taking account two factors: geometry of the wells in relation to gas oil contact and control of the well operation coditions.