| Guided by new theories and viewpoints of sedimentology, petrology, log-geology, oil and gas geochemistry, the paper used extensive data including seimic, log, cores, oil samples and oil-gas geochemistry in order to make an integrated research on the northwest margin of Zhunger Basin .It emphasized on the distribution and laws of sedimentary facies,the controlling factors of facial distribution and relations between oil and sedimentary facies. It also made detailed analyses of geochemical character of oil pools in various district. The paper also studied the relationship between oil-resources correlation and evolutionary traits of oil pools. After integrated studies on sedimentary facies and geochemical character in this area,it is concluded that the oil and gas reserves in this district are mainly controlled by fans such as fan-detal ,denthic fans and alluvial fans.and that pool foration in the area under study is of multi-phase character. So the exploration domains are evaluated and anticipated. |
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