It has been found that the existence of chlorite and illite will lead to the rock wettability of oil affinity. Chlorite and illite are developed in shaly sandstone of Yingcheng Formation in Longfengshan area, the saturation index n of 7 rock samples is very high, with the highest of 14.57, whereas the cementation index m is low. The X-ray diffraction of clay and whole rock analysis of 7 shaly sandstone samples are carried out, and the relationship between chlorite and illite content vs. m and n is established. It is concluded that the low m value and high n value are caused by the wettability of rock. In order to verify the influence of wettability on the parameters of rock electricity, this paper discusses the method of making artificial shaly sandstone and the control of wettability. This study provides certain reference for determining the saturation model of shaly sandstone and improving the logging interpretation accuracy of shaly sandstone reservoirs.
Abstract
It has been found that the existence of chlorite and illite will lead to the rock wettability of oil affinity. Chlorite and illite are developed in shaly sandstone of Yingcheng Formation in Longfengshan area, the saturation index n of 7 rock samples is very high, with the highest of 14.57, whereas the cementation index m is low. The X-ray diffraction of clay and whole rock analysis of 7 shaly sandstone samples are carried out, and the relationship between chlorite and illite content vs. m and n is established. It is concluded that the low m value and high n value are caused by the wettability of rock. In order to verify the influence of wettability on the parameters of rock electricity, this paper discusses the method of making artificial shaly sandstone and the control of wettability. This study provides certain reference for determining the saturation model of shaly sandstone and improving the logging interpretation accuracy of shaly sandstone reservoirs.
关键词
wettability /
rock electricity parameters /
chlorite /
illite /
shaly sandstone
Key words
wettability /
rock electricity parameters /
chlorite /
illite /
shaly sandstone
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
Archie G E. 1942. The electrical resistivity log as an aid in determining some reservoir characteristics.Trans AIME,146(1):54-62.
Han X H, Yang L, Hou Q Y,et al. 2007. A new method for making artificial rock of unconsolidated sandstone cemented by dispersed shale.Progress in Geophysics,28(6):2944-2949. (in Chinese with English abstract)
Ji L, Chen K G, Wang G,et al. 2009. Study on wettability mechanism of rock.West-China Exploration Engineering,21(7):100-102. (in Chinese with English abstract)
Liang W L. 2008. Study on preparing artificial cores.Petro-leum Instruments,22(2):72-74. (in Chinese with English abstract)
Tang R Q, Lu Y. 1986. Preparation and Research of LC Artificial Core.Oil Drilling & Production Technology,8(5):75-79. (in Chinese)
Tang R Q. 1994. Manufacturing and research of GM artificial rock samples.Compound Oil and Gas Field,5(3):50-53. (in Chinese)
Tang R Q, Zeng Y H, Yao F Y. 1998. The manufacture and study if HNT artificial rock sample.Oil Drilling & Production Technology,20(1):98-102. (in Chinese with English abstract)
Trantham J C,Clampitt R L. 1977. Determination of oil saturation after waterflooding in an oil-wet reservoir the North Burbank Unit, Tract 97 Project.Journal of Petroleum Technology,29(5):491-500.
Wang Z W, Li X F, Cheng S Q,et al. 2006. Influential factors on phase chance of condensate gas in porous Media. Natural Gas Industry,29(1):90-92. (in Chinese with English abstract)
Wen Y C. 2018. Study on the characteristics of core permeability and relative permeability curve:master's degree thesis. Beijing:China University of Petroleum (Beijing). (in Chinese with English abstract)
Xiong Y, Xu H G, Wang Y Q,et al. 2018. Progress of physical research on domestic artificial cores.Oil & Gas Exploration and Development,36(1):55-61. (in Chinese with English abstract)
Xu H B, Liu L, Li J G. 2011. The manufacturing methods of artificial sandstone core in Daqing oilfield. Science Technology and Engineering,11(30):7344-7348. (in Chinese with English abstract)
Yu B, Song Y J, Jia G Y,et al. 2006a. Design and making of synthetic cores for laminated and dispersed shaly sands.Journal of Daqing Petroleum Institute,30(4):88-90. (in Chinese with English abstract)
Yu B, Song Y J, Han Y X,et al.2006b. Experimental measurement of synthetic core samples for laminated and dispersed shaly sands.Journal of Daqing Petroleum Institute,30(4):91-94. (in Chinese with English abstract)
Zhang N Y. 2016. Production and Application of Daqing Oilfield Xingshugang artificial sandstone cores:master's degree thesis. Daqing:Northeast Petroleum University. (in Chinese with English abstract)
Zhao L C. 2017. Research progress in wettability measurement of low permeability reservoir.Petrochemical Industry Application,36(8):1-6. (in Chinese with English abstract)
Zhou C L, Zhu C A, Wang Y Q,et al. 2017. Study on the development of man-made core and the influencing factors of permeability.Petrochemical Industry Application,36(9):85-89. (in Chinese with English abstract)
基金
Supported by projects of Science and Technology Development Excellent Young Talents of Jilin Province(No. 20190103150JH)and Science and Technology Development Plan of Jilin Province (No. 20170201001SF).
PDF(466 KB)
