Characteristics of fault accommodation structure-slope break zone and its control on reservoir distribution in southern subsag of Uliastai Sag，Erlian Basin
Wang Youzhi, Zhang Weihai
College of Geo-Resources and Information， China University of Petroleum（East China），Dongying, 257061,Shandong
Abstract：Based on restoration of the Early Cretaceous palaeogeomorphology of southern subsag of Uliastai Sag，researches have been carried out on the relationship between characteristics of fault accommodation structure-slope break zone， depositional systems， and reservoir distribution.The analyses show that the compound structural assemblage controls the shape of sandbody and reservoir distribution.There are accommodation structure-upper slope break， middle slope break and lower slope break spreading in NNE direction in southern subsag in the study area during the Early Cretaceous.The accommodation structure-slope break zone controls the formation of depositional systems. There are large-scaled fan delta—sublacustrine fan depositional system；The accommodation structure-slope break zone controls shapes of sandbodies，mainly seven small-scaled sublacustrine fan sandbodies were distributed in a tongue-like shape.Multistage slope breaks provide spaces for sediments deposition. The accommodation structure also controls provenance and drainage system，the major reservoir types are fan delta front and sublacustrine fan sandbodies controlled by the accommodation structure-slope break zone in southern subsag of the Uliastai Sag.The compound structure with different orders lead to the differences of reservoir types and their petrophysical property.
Wang Youzhi,Zhang Weihai. Characteristics of fault accommodation structure-slope break zone and its control on reservoir distribution in southern subsag of Uliastai Sag，Erlian Basin[J]. JOPC, 2009, 11(5): 573-580.
崔周旗，吴建平，李莉，等.2001.二连盆地巴音都兰凹陷早白垩世构造岩相带特征及含油性［J］.古地理学报，3(1):25-34. 李群，王英民.2003.陆相盆地坡折带的隐蔽油气藏勘探战略［J］.地质论评，49(4):445-448. 库国正，张放东，邓已寻，等.2005.白音查干凹陷变换构造与油气关系［J］.石油与天然气地质，26(4):257-261. 林畅松，潘元林，肖建新，等.2000.构造坡折带——断陷湖盆层序和油气预测的重要概念［J］.地球科学——中国地质大学学报，25(3):260-267. 刘豪，王英民，王媛.2004.坳陷湖盆坡折带特征及其对非构造圈闭的控制［J］.石油学报，25(2):30-35. 刘震，郝琦，赵贤正，等.2007.二连盆地砂岩体形成和分布的多元控制特征分析［J］.地质科学，42(2):319-334. 孙向阳，任建业.2004.东营凹陷北带转换带构造与储集体分布［J］.石油勘探与开发，31(1):21-23. 孙思敏.2007.东濮凹陷调节构造特征［J］.油气地质与采收率，14(2):38-45. 王英民，金武弟，刘书会，等.2003.断陷湖盆多级坡折带的成因类型、展布及其勘探意义［J］.石油与天然气地质，24(3):199-203. 王英民，刘豪，李立诚，等.2002.准噶尔大型坳陷湖盆坡折带的类型和分布特征［J］.地球科学——中国地质大学学报，27(6):683-687. 王英民，刘豪，辛仁臣，等.2005.坡折带——岩性油气藏勘探的重要领域［M］.北京：石油工业出版社，468-518. 邬光辉，漆家福.1999.黄骅盆地一级构造变换带的特征与成因［J］.石油与天然气地质，20(2):125-128. 张善文，王英民，李群.2003.应用坡折带理论寻找隐蔽油气藏［J］.石油勘探与开发，30(3):5-7. 赵红格，刘池洋，杨明慧，等.2000.调节带和转换带及其在伸展区的分段作用［J］.世界地质，19(2):105-110. Gibbs A D.1990.Linked fault families in basin formation［J］.Journal of Structural Geology，12(5-6):795-803. Lemons D R.1999.Facies architecture and sequence stratigraphy of fine-grained lacustrine deltas along the eastern margin of late Pleistocene lake Bonneville，northern Utah and southern Idaho［J］.AAPG， 83(4):635-665. Morley C K，Nelson R A，Patton T L.1990.Transfer zones in east African Rift system and their relevance to hydrocarbon exploration in rifts［J］.AAPG Bulletin，74(8):1234-1253. Posamentier H W，Jervey M T，Vail P R.1988.Eustatic Controls on Clastic Deposition I-Conceptual Frameworks in Sea-level Changes：All Interpreted Approach［M］.Spec.Pub1.Soc.Ecan Paleont.Miner.42:104-114. Stow D A V，Mayall M.2000.Deep-water sedimentary systems：New models for the 21st century［J］.Marine and Petroleum Geology，17(2):125-135. Vail P R，Mitchum R M，Todd R G， et al. 1977.Seismic stratigraphy and global change of sea level.In：Payton C E.Seismic Stratigraphy-Application of Hydrocarbon Exploration［C］.AAPG Memoir，(26):49-212. Vail P R，Audemard F，Bowman S A， et al. 1991.The stratigraphic signaturm of tectonics，eustasy and sedimentology: An overview［C］.In：Einsele G，Ricken W，Seilacher A(eds). Cycles and Events in Stratigraphy.Springer Verlag，Berlin Heidelberg New York， 617-659. Van Wagoner J C，Mitchum R M,Campion K M， et al. 1990.Siliciclastic sequence stratigraphy in well logs,cores,and outcrops［M］.AAPG Methods in Exploration Sereis， 1-55. Wescott W A.1997.Channel and valley：Difference in word or meaning［J］.The Leading Edge， 16(6):867-873. Wheeler H E.1964.Base level，lithosphere surface，and time-stratigraphy［J］.Geological Society of American Bulletin， 75(7):599-610.
