Open AccessResearch on Sand Body Description and Perforation Plan Optimization of Off-surface Reservoir in Block a of X Oilfield
Author(s) -
Yuanyuan Zhang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/781/2/022064
Subject(s) - coring , geology , facies , perforation , block (permutation group theory) , front (military) , sedimentary rock , petrology , drilling , geotechnical engineering , geomorphology , structural basin , geochemistry , materials science , geometry , oceanography , punching , mathematics , metallurgy
Based on the previous understanding of off-surface reservoirs of closed coring wells in Block B of X Oilfield, this paper selects the “four injection and nine production” test well group in Block A as the research object, and studies the distribution characteristics of dominant bands in off-surface sand bodies. The results show that the off-balance-sheet reservoirs can be vertically subdivided into two types and seven sub-types of sand body connectivity patterns, and the understanding of sand body connectivity is deepened by finely depicting sedimentary facies belts on the plane. On the basis of the above research, according to the sedimentary environment and distribution characteristics of the dominant zones, the perforation scheme of the tertiary infill wells is further optimized, and the three principles of “no shooting in the inner front, type I and II selective shooting in the outer front, and type III and IV full shooting in the outer front” are defined, which provides a new research direction for effectively controlling the rapid rise of water cut in the initial stage of new wells and further tapping the potential of the off surface remaining oil.