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- Title
考虑变启动压力和压敏效应的蒸汽吞吐 产能计算新方法.
- Authors
张 宇; 李承龙
- Abstract
The pressure-sensitivity of low-permeability reservoir leads to variable starting pressure, permeability and porosity, which seriously influence the production of low-permeability heavy-oil reservoir. At present, the pressure-sensitivity effect has not been taken into consideration for the available productivity forecast models of steam stimulation, which shows a significant deviation and poor applicability. Based on the fluid seepage theory of low-permeability heavy-oil reservoir, lateral radial flow pressure distribution pattern and formation temperature dis tribution pattern, the pressure-sensitivity equation was used to deduce a productivity forecast model for horizontal and vertical wells in the low-permeability heavy-oil reservoir by considering starting pressure and pressure-sensi tivity. Then it was applied to a certain block in Shengli Oilfield. Research indicates that the actual cumulative oil production of 3 horizontal wells in the pilot test is 4 695 t, the forecasted cumulative oil production is 4 893 t and the corresponding forecast error is only 4, 22%. The actual cumulative oil production of 12 vertical wells in the pilot test area is 3 868 t, the forecasted cumulative oil production is 4 080 t and the corresponding forecast error is only 5. 46%. This research can be applied to evaluate the productivity of low-permeability heavy-oil reservoirs and could also provide a theoretical basis for the efficient development
- Publication
Special Oil & Gas Reservoirs, 2020, Vol 27, Issue 1, p89
- ISSN
1006-6535
- Publication type
Article
- DOI
10.3969/j.issn.1006-6535.2020.01.013