Abstract:The physical property lower limit for mining of tight oil reservoir is becoming lower and lower, gradually approaching that of accumulation filling. Therefore, it is significantly important to accurately determine such lower limit. The bound water film thickness plays a key role in the determination, while the surface area of bound water can be obtained accurately by nitrogen adsorption experiment. There are quite a few defects despite many methods to determine the volume of bound water film. Through investigating various methods, the rock-electric experiment which simulates the formation pressure and temperature is finally adopted, combined with the Archie formula to calculate the saturability, then the volume and finally the thickness of bound water film. The method can well simulate the strata environment, with result closer to the true value, thus the obtained bound water film thickness is more accurate. The low limit of pore throat mean radius is determined by establishing its relation to the bound water film thickness. Then, with principle of statistics, the relation between the pore throat mean radius and permeability is set up to finally decide the low limit of porosity filling and permeability of tight oil reservoir. The results prove to be accurate according to the mercury injection curve.
王洋, 陈海峰, 王凤启. 结合高温高压物性实验确定致密油储层充注物性下限新方法[J]. 地质与资源, 2019, 28(1): 66-71.
WANG Yang, CHEN Hai-feng, WANG Feng-qi. DETERMINATION OF THE PHYSICAL PROPERTY LOWER LIMIT OF TIGHT OIL RESERVOIR BY HIGH-TEMPERATURE AND HIGH-PRESSURE EXPERIMENT. GEOLOGY AND RESOURCES, 2019, 28(1): 66-71.
Cheng Y, Zhang C, Zhu L Q. A fractal irreducible water saturation model for capillary tubes and its application in tight gas reservoir[J]. Journal of Petroleum Science and Engineering, 2017,159:731-739.
Lewicki J P, Ratel M, Morrell P, et al. The stability of polysiloxanes incorporating nano-scale physical property modifiers[J]. Science and Technology of Advanced Materials,2008,9(2).
Kwon M, Kang H, Ahn J H, et al. Comparison on physical property, dissolution and disintegration of four launched orally disintegration film (ODF) products for erectile dysfunction[J]. Journal of Pharmaceutical Investigation,2014,44(4).
Hamada G M, Almajed A A, Okasha T M, et al. Uncertainty analysis of Archie's parameters determination techniques in carbonate reservoirs[J]. Journal of Petroleum Exploration and Production Technology, 2013,3(1):498-502.
Zhang X W, Cao G S, Niu L J, et al. Determination of irreducible water saturation and its application in analysing water producing after fracturing[J]. Applied Mechanics and Materials, 2014,3147(548):1120-1125.
Timmer A. Kontrollierte klinische Studien vor Archie Cochrane[J]. Zeitschrift fuer Evidenz, Fortbildung und Qualitaet im Gesundheitswesen, 2008,102(8):895-906.
Cong C, Ma S Z, Li J H, et al. Study on physical property lower limit of effective reservoir of deep layer in Qingshui-Yuanyang area[J]. Advanced Materials Research, 2013(616-618):104-108.
[27]
Feng C, Shi Y J, Li J H, et al. A new empirical method for constructing capillary pressure curves from conventional logs in low-permeability sandstones[J]. Journal of Earth Science, 2017,28(3):516-522.