Hidrológiai Közlöny 1942 (22. évfolyam)

Szakosztályi ügyek

Part played by water in Oil production. By: János Dinda. In delving into the part played by water in the production of Oil there can be distinguished two interdependent chapters. Namely: the first ranges from the time the raw material, that will eventually turn into oil and the formations enclosing it begin sedimentation and ends when oils have been encountered and its surfacing will have been commenced. The second chapter dates from the time of surfacing oil, deals with the behaviour on the surface and thereunder of water encountered and comes to its termination simultaneously with abandonment. Supposing that Oil comes into being by way of organic sedimentation, water does in enormous quantities prevail already at the time when the minute organic beings begin to sink down to the bottom of the bay or to that of some inland lake. According to ascertations made so far, this water is either salt or brackish and it penetrates into the sediment filling up the basin. Further sedimentations had for the most part taken place during the prevalence of water, or, at least so much can be supposed that in the course of such sedimentations taking place water had succeeded in reaching them. At any rate it appears to be certain that water and the basic material of Oil do in combination constitute the formation of sedimentary origin. During the course of additional geological events the sediments do become more and more compact, the prevailing pressure, or, pressure and heat combined, squeeze water and oil from shaly or clayey, or, to say it better, from fine-grained compact formations of sedimentary origin into porous ones much better suited to storing or as means for flowing them. Broadly speaking it might be supposed that the porous formation was water-wet at the time when the water and oil squeezed out of more compact formations reached it. Therefore, it is probable, that in case of sand, oil finds room in the pores between sand grains filmed with water. (Water is being held to the sandgrains by adheison.)