Three-dimensional geodetic deformation surveying for Naner area in Daqing oilfield
(1.The Second Oil Recovery Plant of Daqing Oilfields Co Ltd, Daqing 163414, China2.Daqing Logging and Testing Services Company, Daqing 163411, China3.Longnan Telephone Station of Daqing Communications Center, Daqing 163410, China4.Department of Civil Engineering, Wuhan Polytechnic University, Wuhan 430023, China)
Abstract: Geodetic deformation severely affects the development of the oilfield and probably causes casing damage or abandonment of injection wells and producers. Therefore, it is meaningful to survey and study three-dimensional geodetic deformation in the process of the oilfield development. In order to study this issue, 11-year long term surveying of three-dimensional geodetic deformation has been carried out while developing Naner area in Daqing oilfield. Basic rules of 3-D geodetic deformation have been obtained through surveying. Results show that production and injection under high pressure may cause the changes of surface elevation, and geodetic deformation correlates with simultaneous formation pressure. Precautions and relative technological measurements have been put forward in the waterflood development in Naner region and provide theoretical guidelines for the production and casing preservation of the oilfield. Finally, surveying results are interpreted by porous elastic theory. Mathematical model to calculate 3-D geodetic deformation is put forward in the course of the oilfield development.
Key words: Daqing oilfield； geodetic deformation； producer； water injector； mathematical model