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Ma Y.,Xian Shiyou University | Li W.-H.,Northwest University, China | Wang R.-G.,Research Institute of Yanchang Petroleum GROUP Co. | Zhang H.-R.,Petrochina
Natural Gas Geoscience | Year: 2015

Analytical tests were used in this study such as core observation, casting thin section observation, SEM, high pressure Hg injection and X-ray diffractometer. Based on study of lithology characteristics, physical properties and pore structure on Shan2 3 member of Shanxi Formation in the north of Zizhou Gasfield in the Ordos Basin, the diagenesis was analyzed qualitatively and quantitatively by multi-parameter. Diagenetic evolution sequence, determined diagenetic stage and porosity evolution were restored. The diagenetic facies of reservoir were divided according to the results of diagenesis analysis, physical property and characteristics of capillary pressure curve. The plane distribution characteristics of diagenetic facies were studied. This research shows that Shan2 3 reservoir of the study area has experienced four stages of diagenesis which respectively are compaction, cementation, metasomatism and dissolution. It is now in the phase B of middle diagenetic stage, with parts of the late diagenetic stage. The diagenetic facies of reservoir are divided into six types. The most favorable facies distribute in central of underwater distributary channel in the southwest of the study area, which are potato-like or island shaped. These areas are the preferred for gas exploration and development of Shan2 3 Member in the north of Zizhou Gasfield. © 2015, Science Press. All right reserved. Source


Ma Y.Q.,China University of Mining and Technology | Liu K.,Research Institute of Yanchang Petroleum GROUP Co. | Chen T.,China University of Mining and Technology | Pei G.D.,China University of Mining and Technology
Advanced Materials Research | Year: 2013

Mechanism of water Inrush indicates that water resources is the essential factor for water inrush, roof and floor sandstone aquifer is the main source of water in the shallow seam mining process, take advantage of the physical property that sandstone is porous medium, using logging-seismic-geological comprehensive prediction method to determine the position of the sandstone porosity where is rich in water, the delineation of the rich water area, provide the evidence for the work of mine Water. © (2013) Trans Tech Publications, Switzerland. Source


Ge Y.,Research Institute of Yanchang Petroleum GROUP Co. | Ge Y.,China University of Petroleum - East China | Chen Y.,China University of Petroleum - East China | Zhou Y.,China University of Petroleum - East China | And 2 more authors.
Scientia Geologica Sinica | Year: 2012

The experiment which temperature and pressure were near the condition ofnatural reservoir was carried out to synthesize hydrocarbon inclusions in carbonate within pure oil. Through the microscopic and fluorescent characters of hydrocarbon inclusions in carbonate, it demonstrated that carbonate remained growing and trapping inclusions when fluid medium was pure oil. The water was not necessity for trapping hydrocarbon inclusions in growing carbonate. Combined with conclusions of predecessors and wettability determination of carbonate, the trapping mechanism of hydrocarbon inclusions in carbonate was concluded as follows: coexistence of oil and water (water wetted), coexistence of oil and water (oil wetted) and pure oil. Under the conditions of water wetted, the mineral matter for carbonate growing was supplied by water solution. The speed of carbonate growing was relatively quick and quantity of synthetic hydrocarbon inclusions was big. Under the conditions of oil wetted, the mineral matter was supplied by both water solution and polar component of oil. Under condition of pure oil, the mineral matter was supplied by polar component of oil and organic acid generated when oil cracking. The mineral matter was limited, so carbonate growing was constrained and quantity of hydrocarbon inclusions was little. Source

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