The formation pressure plays a very important role in drilling engineering. So it is of great
significance to predict formation pressure before drilling. In order to solve the problem, the concept of
formation matrix and wellbore matrixwere put forward. Also the method of epitaxial transplantation
for the regional formation pressurewas proposed. With the concept of wellbore pressure matrix, the
target wellbore pressure matrix can be builtby dealing with the adjacent wellborepressureusing the
method of depth adjustment and weighted distance correction. Finally, we can obtain the formation
pressure of the targetwell. Case study of Qinghai Oilfield was carried out to test the method. Through
comparative analysis, the maximum relative error of the transplantation pressure and logging
interpretation pressure is 4.2%. The result indicated that the accuracy and reliability of the method can
meet the engineering requirement. This is conductive to designers to predict formation pressure which
can provide the basis for the casing design and the selection of the drilling fluid density.
Relation:
Journal of Applied Science and Engineering 19(2), pp.207-213