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Study on Depositional Facies and Reservoir Characteristics of Cambrian and Ordovician in Eastern Tarim Basin

Author: LiTingYan
Tutor: YuBingSong
School: Chinese Geology University (Beijing)
Course: Mineralogy,petrology, Mineral Deposit Geology
Keywords: Sedimentary facies Reservoir Characteristics Cambrian - Ordovician Tadong
CLC: P618.13
Type: Master's thesis
Year: 2005
Downloads: 497
Quote: 1
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Abstract


Tower East is located in the eastern part of the Tarim Basin in Xinjiang, the the exploration practice has confirmed that the area of ??Cambrian - Lower Ordovician there is a set of high-quality hydrocarbon source rocks, said towers eastern Lower Paleozoic oil-rich, looking for high quality reservoirs become tower East in order to obtain the key to the breakthrough of oil and gas exploration. The paper uses the theory of sedimentology, reservoir geology and sequence stratigraphy, to focus on \facies and sedimentary system of the type, distribution and evolution of the reservoir rock characteristics, physical properties and reservoir development control factors, and finally a comprehensive evaluation of reservoir quality. Comprehensive analysis of seismic profiles and LWD clear evaporation platform Tadong Cambrian - Ordovician development phase, restricted platform, open platform, the platform margin, the slope of the platform margin, shelf relative equal to seven facies belts and basins. Initially clear spatial and temporal distribution of depositional systems in the study area, seismic facies based on the combination of drilling and outcrop calibration, the main body of the Middle Cambrian Manjiaer its area to the east are owed compensation shelf - basin phase with the development of the vast region west Manjiaer the platform carbonate rock slope facies and platform margin facies belts along Manjiaer edge into a NS-trending banded distribution. Upper Cambrian to Ordovician sedimentary pattern varies, the British East development platform carbonate rock. The Upper Ordovician in kuruktag Manjiaer widely developed a thick basinal turbidite Manjiaer west side remains the platform carbonate sedimentary rocks. Reservoir petrology and reservoir physical properties, and to explore the characteristics of dolomite, limestone and clastic three types of reservoir rock type, porosity type, reservoir type, porosity and permeability characteristics and pore structure development analysis of the quality control of the different types of reservoirs factors, combined with sedimentary facies belts and seismic profile characteristics, reservoir characteristics, prediction and evaluation on the the Tadong different types of reservoirs. Clear through the study of sedimentary facies and reservoir characteristics, preliminary three major exploration direction: Manjiaer west side of the Cambrian - Lower Ordovician platform margin reef facies belts; Cambrian, eastern Manjiaer, dolomite potential mountain belt; Ordovician basin floor fan turbidites.

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