Dynamics for multistage pool formation of Lunnan low uplift in Tarim Basin

查看全文 作　　者：HE [1]Dengfa;JIA [2]Chengzao;LIU [1]Shaobo;PAN [3]Wenqing;WANG [1]Shejiao 机构地区：[1]Research Institute of Petroleum Exploration and Developmem,PetroChina,Beijing 100083,China;[2]PetroChina Limited Company,Beijing 100011,China;[3]Research Institute of PetroChina Tarim Oil Field Company,Korla,Xinjiang 841001,China 出　　处：《Chinese Science Bulletin》索引2002年第47卷第S1期,共11页 摘　　要：Lunnan area in the Tarim Basin has become animportant onshore oil production base in China. Formationof the oil and gas pools in the low uplift of Lunnan has ex-perienced a comparatively complex process of dynamics.Based on the hydrocarbon generation period of source rocks,the formation period of cap rocks and traps, the analysis oforganic inclusion and the analysis of bitumen in the reservoir,this paper draws the conclusion that the low uplift area ofLunnan has experienced three pool formation periods: thePermian period, the Cretaceous-Early Tertiary period andthe Late Tertiary-Quaternary period and two oil and gasreservoir adjustment periods: the Late Permian period andthe Late Tertiary-Quaternary period. The comprehensivestudy indicates that the large-scale Ordovician buried hill,formed in Early Hercynian, became the reservoir during thePermian period, because the Cambrian-Lower Ordovicianoil was discharged laterally into the reservoir along the topof the Ordovician weathering crust from south to north. Thereservoir experienced a complicated process-reconstruc-tion in the end of Permian, adjustment in Cretaceous-EarlyTertiary and re-discharging process in Late Tertiary-Qua-ternary, leading to the early original heavy oil reservoir ofmarine facies and the late original light oil reservoir and gaspool. Carboniferous, Triassic and Jurassic oil and gas reser-voirs result from upward adjustment and re-distribution ofOrdovician oil and gas reservoirs. Of those results, the for-mation of Triassic-Jurassic oil and gas pools came under theinfluence of the northward-tilting structure. The oil and gassourcing from the different hydrocarbon source rock inter-vals vertically migrated into the base unconformity of Trias-sic system. Then the oil and gas migrated laterally fromnorth to south and accumulated into the reservoir. 关 键 词：organic inclusion DYNAMICS of POOL formation superimposed BASIN reservoirs of multiple stages Lnnnan region TARIM Basin.