Advances in Earth Science ›› 2018, Vol. 33 ›› Issue (11): 1112-1129. doi: 10.11867/j.issn.1001-8166.2018.11.1112.

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Research Progress of Modification of Reservoirs by Dissolution in Sedimentary Rock

Qilin Chen( ), Chenggang Huang   

  1. PetroChina Research Institute of Petroleum Exploration and Development-Northwest, Lanzhou 730020, China
  • Received:2018-08-22 Revised:2018-10-07 Online:2018-11-20 Published:2018-12-21
  • About author:

    First author:Chen Qilin(1963-),male,Dingxi City,Gansu Province,Professor. Research areas include petroleum exploration research and sedimentary analysis.

  • Supported by:
    Foundation item:Project supported by the Major National Science and Technology Projects "Accumulation regulation, key technologies and target evaluation of litho-stratigraphic reservoirs"(No. 2017ZX05001);The Major Science and Technology Project of China National Petroleum Corporation "Enrichment law and key technologies of large and medium-sized lithologic-stratigraphic reservoirs" (No.2016B-0301) .

Qilin Chen, Chenggang Huang. Research Progress of Modification of Reservoirs by Dissolution in Sedimentary Rock[J]. Advances in Earth Science, 2018, 33(11): 1112-1129.

With the deepening of exploration degree, the progress of exploration technology and the increasing demands for oil and gas resources, some deep buried reservoirs with relatively poor physical properties have attracted more and more attention of geologists. After decades of exploration, many high-quality reservoirs with shallow burial and well-preserved primary pores have been widely discovered and put into production. However, deep buried tight reservoirs with secondary dissolved pores as the main reservoir space are increasingly becoming the focus of exploration in mature exploration areas. Therefore, searching for secondary pore development zones and dissolved "sweet" reservoirs will become an important new field for fine exploration in the future. Based on some typical case studies and a large number of research results, this paper systematically expounded the modification of reservoirs by dissolution from the following four aspects:①Diagenetic stage of dissolution; ②Types of dissolution fluids;③Main controlling factors of dissolution; ④Effect of dissolution on reservoir modification. In recent years, more and more research achievements have made important progress in dissolution mechanism and reservoir modification effect. The systematic analysis of these mainstream views has some reference value for similar geological conditions in the future.

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