| Author's Name: Chen Anding, Dai Jinyou, Wang Wenyue |
| Institution: Geological Research Institute of Jiangshu Oilfield Company, SINOPEC |
| Abstract: |
| This research indicates that gas reservoirs in Jingbian Gasfield, Ordos, are characteristic of:(1)Gas is supplied by mixed gas sources from two directions; (2)Reservoir space are dominated by anhydrite-dissolved and dolomitized pores and subordinated by fractures; (3)Stratigraphic and lithogic traps are common and paleostuctures control the direction of hydrocarbon migration and emplacement; (4)Fluids in gas reservoirs are of heterogencity and negative pressure feature; (5)Formation water are compartmentally preserved without water beds. The mechanism
resulting in these characteristics are discussed. The main geological factors leading to gas accumulation are owing to four"fitting match"conditions: (1)The match of enclosed sea with wide flats brings up good source-reservoir facies belt; (2)The match of erosion ridges with erosion grooves builds up layered dissolved currents; (3)The match of cutting with filling, and dissolution with filling, forms stratigraphic traps and lithologic traps; (4)The match of pore space with fissures nets gets to both gas reserves and output. |
| Keywords: Mixed gas source; Carbonate reservoir; Origin of Gas reservoir; Jingbian Gasfield; Ordos Basin |
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投稿时间：
2009-05-29 |
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