Abstract
Aiming at the inter well drive immobile remaining oil in Fuyu oil layer of block 1 due to the non densification of surface village coverage, taking into account the undeveloped reserves that can not be produced by vertical wells due to being located in the wetland protection area along the river, the feasibility study of layered densification of horizontal wells in the main oil layer with good reservoir development is carried out to explore a new densification mode of horizontal wells in Fuyu tight oil reservoir.
Highlights
Raising questionsThe development experience of block 1 shows that infill adjustment can improve the oil production speed and recovery degree of the block
It is located in the West Wing of nose structure, showing a single slope dipping to the northwest, low in the West and high in the East in the east-west direction, and the stratum dip angle is 1-3.5 °
Medium and small channel sand bodies are developed in main oil layers A, B and C in the proposed well area, with a width of 400 ~ 800m and a thickness of 2 ~ 5m, mostly distributary plain river deposits; The effective thickness of flattening is 3.2, 2.8 and 4.7m respectively
Summary
The development experience of block 1 shows that infill adjustment can improve the oil production speed and recovery degree of the block. In view of the inter well drive immobile remaining oil caused by the non densification of the surface village coverage, taking into account some of the undeveloped reserves that cannot be produced by vertical wells because they are located in the wetland protection area along the river, the layered design horizontal wells of the main oil layers with good reservoir development are preferred, and a new densification mode of horizontal wells in Fuyu tight oil reservoir is explored
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