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The Study on Sand Body Migrating System and Hydrocarbon Acumulation in the North Slope of Dongying Depression
Author: ZhangZongFeng
Tutor: ChaMing
School: China University of Petroleum
Course: Mineral prospecting and exploration
Keywords: Dongying Depression Shahejie Formation Sand body connectivity Hydrocarbon migration Hydrocarbon accumulation
CLC: P618.13
Type: Master's thesis
Year: 2009
Downloads: 452
Quote: 1
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Abstract
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This article integrated application of geological , geophysical , geochemical and other theories and methods , logging, oil testing , analysis and testing of more than 200 wells in the study area , Dongying Sag northern steep slope zone Sandbody conductor system a study on the the sand body conduit system and its relationship with hydrocarbon accumulation . Geological background and analysis based on sequence stratigraphy and depositional systems and sedimentary facies of the results , on the northern steep slope with ancient Paleogene the Shahejie body type , the the planar distribution profile connectivity macroscopic characteristics of the research . The results show that the northern steep slope zone sand bodies are mainly developed in the Sand the Sec - Sand Mikami subsegmental , especially as the the Shahejie Delta sandbodies best connectivity , the layer of sand profiles connectivity is also good is conducive to oil and gas side migration; plane near the northern edge of the raised sand bodies , good connectivity ; the sand four at the end - Sha mid fan of the main developmental stages , with the characteristics of the distribution of inheritance and multi-phase superposition . Contact relationship through the analysis of the sand body and source rocks , diagenesis, the physical characteristics of the sand body , Fracture development and the factors that impact on the effectiveness of the Sandbody pointed layers paragraph high porosity and permeability distribution with transporting the hydrocarbon advantages channels ; with the simulation experiments the microscopic mechanism analysis of the oil and gas sandbody , sand transporting capacity of a semi-quantitative evaluation using fuzzy mathematical method to select a few key factors . To select typical wells in the oil-source correlation analysis to clear sand four sand three in the next two source rocks and their associated distribution characteristics of the three types of crude oil ; physical properties of crude oil , n-alkanes parameters analysis of oil and gas migration direction the results show that the oil and gas has , from the bottom up , from south to north , from both sides of the fault to the migration trend ; fluid inclusion data analysis shows the area of oil and gas accumulation in two : Dongying final Guantao at the end - Minghuazhen period; with each District fault , unconformity distribution characteristics , summed up the fracture and sand body type (T ) , not the unconformity glutenite Body (S -type ) , recessive transporting three kinds of oil and gas ( \accumulation mode , that connected sand body into transporting the oil and gas reservoir plays an important role .
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