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Research on the Sedimentary Facies Characteristics of K Reservoir in Laojunmiao Oil Field

Author: HeYuanFang
Tutor: LinJinYan
School: Northwestern University
Course: Mineralogy,petrology, Mineral Deposit Geology
Keywords: Jiuxi Basin Laojunmiao anticline Baiyanghe K reservoir group Sedimentary facies
CLC: P618.13
Type: Master's thesis
Year: 2011
Downloads: 80
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Abstract


The Laojunmiao oil field is located in the central of the the Jiuquan Basin Laojunmiao anticline belt , is the the asymmetric anticline oil fields of the north slow steep south , and the group of the Tertiary Baiyanghe K reservoir is the important bit oily layer . After decades of mining , oil field has entered a stage of high water cut , however, the research phase for K - layer deposition have no understanding of the system is still at a very low level , K layers of sedimentary facies and sedimentary microfacies characteristics . In order to improve fine exploration efforts to fully absorb the results of previous studies , the guidance of the basic theory and method of sedimentology , geophysics, geochemistry, basin analysis , recovery palaeogeomorphology a variety of theories and methods to study the K reservoir group the type of sedimentary facies and sedimentary facies distribution law of the K reservoir group stratigraphic correlation divided , . The stratigraphic division than to K layer stable distribution segment mudstone and well logs mountain -shaped characteristics marked layer by sedimentary cycles divided the K reservoir group will be divided into K3 , K2 , K1 , 3 small layer , and found that the K strata by overthrusting role K strata vertical repeat , 2K, 3K stratigraphy appears in the top portion of the well Laojunmiao anticline bit . Rock types , sedimentary structures , paleontology, signs , sedimentary cycles , lithology - electrical response characteristics of the outcrop , well log data, drilling core observation and other means delta front Laojunmiao oilfield K layer is identified subfacies , and the development of underwater distributary channel , underwater distributary bay , underwater crevasse-splay underwater natural levee microfacies . The study area is the delta front deposits , the development of a number of underwater distributary channel , was the South East - North West to the broadband -like distribution , deposition phase plane distribution characteristics control sand body distribution , contiguous sand body was sheeted the area is located in the river area , favorable reservoirs are collective .

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