Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (5): 1-10.doi: 10.3969/j.issn.1673-8926.2017.05.001

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Depositional system of lacustrine basins within high-resolution sequence framework:a case of Jurassic to Paleogene in western Turpan-Kumul Basin

YANG Zhanlong1,2, XIAO Dongsheng3, ZHOU Lihua4, HUANG Yunfeng1,2, HUANG Xiaopeng1,2, SHA Xuemei1,2   

  1. 1. PetroChina Research Institute of Petroleum Exploration & Development-Northwest, Lanzhou 730020, China;
    2. Key Laboratory of Reservoir Description, China National Petroleum Corporation, Lanzhou 730020, China;
    3. Research Institute of Exploration and Development, PetroChina Tuha Oilfield Company, Hami 839009, Xinjiang, China;
    4. No. 1 Oil Production Plant, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China
  • Received:2017-02-13 Revised:2017-05-16 Online:2017-09-21 Published:2017-09-21

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Abstract: In order to deepen the fine exploration of Jurassic-Paleogene lithologic reservoirs in the oil-rich zones of the western Turpan Depression of Turpan-Kumul Basin,based on well-seismic matching fourth-order sequence framework establishment,systemically fine depositional system was deeply studied and spatial distribution was depicted. The result shows that establishment of the fourth-order sequence framework based on well-seismic matching is the maximum study unit for understanding fine depositional system,the two-step horizon-reservoir calibration is a key step for the matching analysis of logging calibration to seismic,and the lateral variation analysis of seismic reflection within isochronous sequence framework is core for the deep understanding of contacting and evolution of different sedimentary bodies. It is considered that the differential tectonic activities of Tianshan orogenic belt in the north and the Jueluotage orogenic belt in the south are main controlling factors for the lateral migration of depositional system,the underwater distributary channel sandstone within braided river delta front is the main type of reservoir,and lateral up-dipping and pinching out sand bodies attaching to paleo-topographic setting are favorable for extend lithologic reservoir exploration in Pubei,Putaogou,Shenquan and Shengnan areas of western Turpan Depression. Under the guidance of this understanding,good result has been achieved in the exploration of lithologic reservoirs in oil-rich zones of western Turpan Depression.

Key words: shale gas, shale pore, porosity, pore structure characterization, integral geometry

CLC Number: 

  • TE121.3
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