Study On Distribution Of Remaining Oil And Excavating Potentiality Of Fluvial Facies Sand Bodies In Lamadian Oilfield

There are 67.51 percent reserve distribute in thick oil layer which effect thickness is more than 2m in Lamadian oilfield. At present water-cut in thick oil layer has been reached to 95 percent but 27.4 percent thickness of oil layer has not been water flushed and exploitation extent is 31.3 percent, therefore fluvial reservoir is main development object in Lamadian oilfield.In this paper, both at home and abroad fluvial reservoir using the latest achievements of research and La Oilfield logging cycle characteristics of the water after the initial interpretation of drilling results, Lamadian oilfield established with a variety of geological model of the fluvial facies: summed up the description of the six remaining oil techniques.Affected by the dissection of residual oil distribution, permeability, well spacing, fault block, water pressure, such factors as the state of connectivity in the remaining conventional oil Method, based on the use of fluvial reservoir unit within the structure of technology, the realization of a fluvial reservoir the positioning of the remaining oil in the forecast, made clear the high water cut stage fluvial reservoir oil remaining flat, vertical distribution, based on the current pattern of remaining oil potential and the size of encryption from the pattern of remaining oil potential of the two aspects of the research . First, for sand body improve low levels of injection-production and poor reservoir formed by seepage of residual oil, through the breakdown of water and plugging potential invalid cycle parts. The second is a "combination of 23" and encryption sand body pattern of development control by means of selective perforation fluvial reservoir for water flooding potential, at the appropriate time into the development of tertiary oil recovery, the establishment of a suitable structural unit of remaining oil potential new drive system and the relationship between injection and production, the achievement of water flooding fluvial reservoir of potential sub-scale encryption.The main thesis of this study achieved the following results: First, the compound fluvial facies have been dissected single body;Second,be sure the main resort place of the remaining oil in the fluvial reservoir;Low permeability place of the same flow unit; injection-production disequilibrium place in layer;Third, to formulate Excavating Potentiality of fluvial reservoir;the formation of a local potential of an effective means of remaining oil and a potential large-scale method of residual oil can be effectively adjusted to guide the development of oil field work.