INVESTIGATION OF THE EFFECT OF SEAWATER INJECTION ON OIL DISPLACEMENT FROM CARBONATE ROCK (ON THE EXAMPLE OF A FIELD IN KAZAKHSTAN)

Increasing oil recovery is one of the most pressing issues today. Since the last century, scientists have been actively researching to enhance oil recovery. A huge number of scientists have turned their attention to this issue by using low-mineralized water (LMW). Thus, since the 90s, both theoretical and experimental research has been actively studied. Increased oil recovery depends on rock wettability and surface tension. This approach was key to a significant amount of experimental work. But, despite a lot of research, scientists still have not come to a consensus on the mechanisms that contribute to increased oil recovery. One of the main mechanisms is considered to be the movement of fine particles (i.e., clay particles) during flooding with low-mineralized water (LMW). As shown by the study of the topic of LMW, experimental work was often carried out on light oil. Experimental work with light oil has been positive. However, the interaction of the LMW with high-viscosity oil has not been deeply studied, which is relevant to the fields of Kazakhstan.

1. Morrow, N.R., Buckley,J.S., 2011. Improved Oil Recovery by Low-Salinity Waterflooding, JPT, Distinguished Author Series,pp.106–112.

2. Buzova O.V., Zhubanova K. A. Promising methods in high-viscosity oil production//Bulletin of Kaznitu named after K. I. Satpayev-2010-No. 5 (81)

3. Nadirov K. N. high-Viscosity oils and natural bitumen. In 5-and T. T. 1. History. Pools. Properties. – Almaty: Fyly. m, 2001. - 360 p.

4. Nadirov K. N. high-Viscosity oil and natural bitumen. Vol. 5. Characteristics of deposits. Principles of resource assessment. - Almaty: Fylym, 2001. – 369 p.

5. The Eurasian energy forum. Technology of production of "heavy" oil. ConocoPhillips. 05.09.2008 g

6. Austad,T., Rezaei Doust,A., Puntervold,T.,2010. Chemical Mechanism of Low Salinity Water Flooding in Sandstone Reservoirs. Paper SPE 129767 presented at the SPE Improved Oil Recovery Symposium. Tulsa,OK,24-28 April.

7. Mohammed B. Alotaibi, Ramez A. Nasralla, Hisham A. Nasr-El-Din. Wettability Studies Using Low-Salinity Water in Sandstone Reservoirs/SPE-149942-PA/ http://dx.doi.org/10.2118/149942-PA

8. Lager. A.. Webb. K.J.. Black. C.J.J.. Singleton. M., Sorbic, K.S.. 2008a. Low salinity oil recover) – an experimental investigation. Petrophysics 49 (1). 28-35.

9. Lager, A., Webb, K.J.. Collins, I.R., Richmond, D.M., 2008b. LoSal™ enhanced oil recoveryevidence of enhanced oil recovery at the reservoir scale. Paper SPE 113976 Presented at the 2008 Improved Oil Recovery Symposium, 19-23 April.

10. P. McGuire, J. Chatham, F. Paskvan, D. Sommer, and F. Carini, “Low salinity oil recovery: an exciting new EOR opportunity for Alaska’sNorth slope,” in Proceedings of the SPEWestern Regional Meeting, SPE-93903-MS, Irvine, California, USA, April 2005.

11. Morrow,N.R., Tang,G., Valat,M., Xie,X., 1998. Prospects of improved oil recovery related to wettability and brine composition.JPSE 20,267-276.

12. Nasralla, R.A., Bataweel, M.A., Nasr-El-Din, H.A., 2011. Investigation of Wettability Alteration by Low Salinity Water. Paper SPE 146322 presented at the Offshore Europe. Aberdeen, UK, 6-8 September.

13. Tang,G., Morrow,N.R.,1997.Salinity,temperature,oilcomposition and oil recovery by water flooding. SPE RE November,269-276.

14. Tang, G.Q. Morrow, N.R., 1999. Influence of brine composition and fines migration on crude / oil/ rock interactions and oil recovery. J. Pet. Sci.Eng.24, 99-111 р.

15. Vledder, P., Fonseca,J.C., Wells,T.,Gonzalez,I., and Ligthelm, D., 2010.Low Salinity Water Flooding: Proof Of Wettability Alteration On A Field Wide Scale.Paper SPE 129564, SPE Improved Oil Recovery Symposium, Oklahoma, USA.