Research progress and key issues of ultra-deep oil and gas exploration in China  

作　　者：HE Dengfa JIA Chengzao ZHAO Wenzhi XU Fengyin LUO Xiaorong LIU Wenhui TANG Yong GAO Shanlin ZHENG Xiujuan LI Di ZHENG Na 

机构地区：[1]China University of Geosciences(Beijing),Beijing 100083,China [2]China National Petroleum Corporation,Beijing 100724,China [3]PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China [4]China Petroleum Society,Beijing 100120,China [5]Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [6]Northwestern University,Xi'an 710069,China [7]PetroChina Xinjiang Oilfield Company,Karamay 834000,China [8]China Petroleum and Chemical Corporation,Beijing 100728,China [9]China University of Petroleum(Beijing),Beijing 102249,China

出　　处：《Petroleum Exploration and Development》2023年第6期1333-1344,共12页石油勘探与开发（英文版）

基　　金：Supported by the National Natural Science Foundation of China(U19B6003-01,42330810).

摘　　要：Based on the recent oil and gas discoveries and geological understandings on the ultra-deep strata of sedimentary basins, the formation and occurrence of hydrocarbons in the ultra-deep strata were investigated with respect to the processes of basin formation, hydrocarbon generation, reservoir formation and hydrocarbon accumulation, and key issues in ultra-deep oil and gas exploration were discussed. The ultra-deep strata in China underwent two extensional-convergent cycles in the Meso-Neoproterozoic Era and the Early Paleozoic Era respectively, with the tectonic-sedimentary differentiation producing the spatially adjacent source-reservoir assemblages. There are diverse large-scale carbonate reservoirs such as mound-beach, dolomite, karst fracture-vug, fractured karst and faulted zone, as well as over-pressured clastic rock and fractured bedrock reservoirs. Hydrocarbons were accumulated in multiple stages, accompanied by adjusting and finalizing in the late stage. The distribution of hydrocarbons is controlled by high-energy beach zone, regional unconformity, paleo-high and large-scale fault zone. The ultra-deep strata endow oil and gas resources as 33% of the remaining total resources, suggesting an important successive domain for hydrocarbon development in China. The large-scale pool-forming geologic units and giant hydrocarbon enrichment zones in ultra-deep strata are key and promising prospects for delivering successive discoveries. The geological conditions and enrichment zone prediction of ultra-deep oil and gas are key issues of petroleum geology.

关 键 词：China ultra-deep oil and gas multi-cycle superimposed basin exploration progress exploration technology light oil natural gas 

分 类 号：P618.13[天文地球—矿床学]