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Diagenetic Evolution Modeling and Reservoir Secondary Pore Predicting in Qijia Oil Field

Author: LiuShaoJun
Tutor: LuShuangZuo
School: Daqing Petroleum Institute
Course: Geochemistry
Keywords: Diagenesis Numerical Simulation Secondary porosity Organic acids Clay minerals Formation water Qijia depression
CLC: P618.131.1
Type: Master's thesis
Year: 2008
Downloads: 142
Quote: 1
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Abstract


Paper application of microscopic reservoir testing techniques , to reservoir diagenesis macroeconomic research and petroleum geological characteristics of the study area , on the the Songliao Basin Qijia oilfields layers diagenetic environment , diagenetic stage diagenesis types of secondary porosity characteristics , secondary porosity development rules and genetic mechanism system . Diagenesis process (process oriented) principle of analog integrated considering temperature , pressure , fluid and time four kinds of factors of diagenesis by simulated diagenetic parameters vitrinite reflection rate , paleotemperature , mixed illite / in Mongolia the soapstone content authigenic quartz percentage content and sterane isomerization rate variation in time and space , and then simulate the diagenetic history of your family oilfields and to predict the distribution characteristics of the diagenetic stage . Measured porosity the cast thin that the District Cenozoic reservoir two secondary porosity development between 1600 ~ 2180m and 2300 ~ 2500m with two secondary porosity the band corresponding Gaotaizi reservoirs and Fuyang reservoir the study found that abnormal the high stomatal development of local organic acids are also more developed . It is due to the emergence of two secondary pore zone , the Cenozoic deep clastic reservoirs , relatively high quality reservoir porosity development in the context of a generally low porosity and permeability . A comprehensive analysis of the study area, clay minerals into organic matter thermal evolution of the temperature field , pressure field , formation water salinity , organic acid , carbonic acid, the type of sandstone diagenesis , sedimentary facies , depth horizon of secondary porosity , summed up the law of development of secondary porosity . Think the Qijia oilfields secondary porosity main controlling factors for organic acids and carbonic acid ( organic and inorganic ) dissolution . Mainly in the distribution pattern of organic acids and carbonic acid , refer to a variety of factors , the use of the planar contour map superimposed law with secondary porosity in the study area were predicted , predicted results with known oil-bearing area with good correlation , which provides a valid indicator for a favorable target prediction .

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CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Fuel deposits > Oil, natural gas
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