Investigation of the Hard-to-Recover Green Field as a Key to Development Optimization
Y. Golovatskiy, I. Ishimov, T. Kryuchkova, D. Sleptsov, N. Parshin and N. Mezhnova
Event name: ProGREss'19
Session: Round table «Field Development Role at Appraisal» / Круглый стол «Модели разработки месторождений на ранних стадиях»
Publication date: 05 August 2019
Info: Extended abstract, PDF ( 738.37Kb )
Price: € 20
A case study of investigation of the hard-to-recover tight green field in West Siberia is presented in the paper. The objective of the test was direct measurement of stresses in the target oil-bearing formation as well as in layers above and below, subsequently, obtained data were used to revise the model of hydraulic fracturing for multi-stage horizontal fracturing applications. The motivation to check the model was driven by high water cuts in new horizontal wells drilled at a lower depth. According to the revised geomechanical model, the stress profile in the field is not common for West Siberia, having very low stress contrast between the producing layer and shale layers above. Fractures exhibited excess height growth that could not be identified by common methods of analysis. Therefore, a primary source of water production was identified to be the layer above the producing formation (50-70 m above). The pilot horizontal wells with multi-stage fracturing according to the revised fracture technology application were positive: water cut remained below 15%. This results helps to optimize the development strategy of the field and to improve economic viability.