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Solid-Fluid Action of Glutenite and Predicton of Favorable Reservoirs in North Belt of Dongying Depression
Author: WangHuaJun
Tutor: HuangWenHui
School: Chinese Geology University (Beijing)
Course: Mineral prospecting and exploration
Keywords: The Dongying sag North with Diagenesis Main controlling factors
CLC: P618.13
Type: Master's thesis
Year: 2011
Downloads: 81
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Abstract
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In this paper, through the Dongying Depression the north belt deep glutenite of petrology characteristics, diagenesis systems research to explore the main factors affecting the reservoir properties, reservoir evaluation and classification, prediction of favorable reservoir, North sandy Dongying Depression exploration and development of the four has a very important significance. In the documentation has been collected on the basis of core observation, then the selection of the sample producer. Through the microscope on the the ordinary foil and cast thin layer of the main rock types for the purpose of statistical research area, analyze the rock characteristics, type of diagenesis and pore types. Combination of porosity and permeability reservoir properties data collected, summarizes the characteristics of the physical properties of the sandstone reservoirs by logging data, analysis of its reservoir properties. The combination of sedimentary facies, diagenetic phase and single-well reservoir evaluation results, the prediction of favorable reservoir. Major achievements and understanding as follows: Dongying Sag North with Shahejie mainly developed nearshore subaqueous fan deepwater turbidite fan sublacustrine fan deposition described by the observation of the specimens, we found in the study area sand four The lithology primarily glutenite which sandstone arkose, lithic arkose and feldspathic lithic sandstone. Compositional maturity and textural maturity are lower, the interstitial material the muddy the Miscellaneous base and cement. Cement calcareous, siliceous and clay-based, small amounts of pyrite, chlorite mineral. Parent rock complex composition and the lithic component accounted for a large proportion of diagenesis porosity. The Shahejie experienced multiple diagenetic environment evolution, the diagenetic fluids include acidic and alkaline fluid reservoir at different times, destruction or transformation of great change in fluid - solid interaction between reservoir properties. In addition to the interaction between the solid - fluid has a great impact on reservoir properties, there are some other factors of the physical properties of the reservoir has a greater impact on the interaction between these factors and solid - fluid reservoir The impact of the physical properties are closely related, is therefore necessary to analyze from the fundamental aspects. These factors are: sedimentary facies, tectonic activity and depth. The area's favorable reservoir sedimentary facies of the nearshore subaqueous fan and deepwater turbidite fan. Different sub-phase of the same sedimentary facies and microfacies its reservoir physical properties are very different. Nearshore subaqueous fan, for example, the best reservoir properties of the nearshore subaqueous fan in the fan subphase braided channel microfacies deposited glutenite the inner fan subphase main waterways microfacies followed by final is the outer fan subfacies. Tectonic activity of the area is mainly faulting. Through the porosity contours of the plan, we can see, the higher porosity near the fault, especially the change in fault strike turning parts. Because of the role of the fault, we also found faults development in near Shengbei fault the many fault block oil and gas reservoirs.
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